Day 2 :
- Regenerative Medicine | Models of Regeneration | Cell and Organ Regeneration | Regenerative Medicine Market
Location: Kiel 1-3
Chair
Hans-Georg Simon
Northwestern University, USA
Co-Chair
Jaroslaw Fabis
Medical University of Lodz, Poland
Session Introduction
Hazem Barmada
Mississippi Stem Cell Treatment Center, USA
Title: The addition of EPAT to SVF is perceived to improve the treatment outcomes in severe degenerative joint conditions- a small personal series
Biography:
Hazem Barmada is a Cardiovascular & Thoracic Surgeon. He has completed his Graduation from St. Andrews and Manchester Universities in 1971 and 1974, respectively. He was active in Martial Arts in Britain from 1968 to 1984 and Medical Officer to the Martial Arts Commission and other major karate organizations in GB from 1974 to 1984. He is a Fellow of the Royal College of Surgeons of Edinburgh in General and Cardiothoracic Surgery and a Member of the Society of Thoracic Surgeons and American College of Phlebology. He has two patents and published a number of papers. His interests include “regenerative medicine and stem cell research, sports injuries and venous and lymphatic disease”.
Abstract:
Stromal vascular fraction (SVF) was first isolated from adipose tissue around 1970. SVF has proved very effective to manage many hitherto difficulties or untreatable conditions, including severe degenerative joint disease (DJD), medically. Nonetheless, it has not been effective in every case, especially in the more severe cases of DJD, possibly reflecting the diversity of the pathology within each category. Extracorporeal Pulse Activation Technology (EPAT), alias dictus shock or Pressure Wave Therapy (ESWT), is a non-invasive technology platform of Storz Medical that employs acoustic pressure waves to affect a mechanic-transduction response at the cellular level, which leads to cell activation, improved metabolism, angiogenesis, neovascularization and improved healing. This has been used as a stand-alone modality for treating various musculoskeletal conditions in Germany over the past two decades. In a small series of patients with severe DJD who have either refused surgery or had undergone multiple unsuccessful surgeries, we found the addition of EPAT to the deployment of SVF intravenously as well as locally, were perceived to be highly effective in decreasing pain, reducing stiffness and increasing functionality. It was also perceived that giving 2-43 treatments of EPAT to the region in question, days apart and one treatment immediately before the SVF deployment, enhanced the benefit. This possibly recruited more local repair processes, attracting more regenerative cells, and releasing growth factors and cytokines for repair.
Romaldas Maciulaitis
Lithuanian University of Health Sciences, Lithuania
Title: Translational challenge in renal regeneration: Establishment of posology
Biography:
Romaldas Maciulaitis has completed his MD and PharmD studies more than 20 years ago and after PhD studies in Clinical Pharmacology he was involved into Drug Regulatory and Scientific Appraisals at the national (Lithuania) and international (European) levels. In 2009, he initiated new experimental Pharmacology research direction in his University in Kaunas on Regenerative Pharmacology applying cell preparations with research program focusing on PK/PD of cell therapies in renal and cartilage injuries. He has published more than 20 papers in reputed journals.
Abstract:
The scientific and regulatory communities are confronted during more than 10 last years with rather numerous controversial views in what is important for successful clinical translation for what is seen as promising during non-clinical studies. Not the last reason why is this still valid today is the fact that there are numerous gaps in knowledge obtained in the fundamental understanding of the biological rationale of regenerative capacities in case of various cell and gene based technologies. On the other hand, regulatory environment of this technology is heavily driven by the principles of conventional drug development and it is not necessarily easily transferable to regenerative drugs, starting from defining the effective dose. The renal regeneration could serve as one of the typical examples of this controversy. One of the biggest remaining uncertainties in cell therapy for kidney regeneration is the understanding of the mechanisms involved in the therapeutic effect. Among the possible mechanisms of action of mesenchymal stem cells (MSCs) for the treatment of acute kidney injury are the reduction of cell apoptosis and the anti-inflammatory effects via paracrine/endocrine mechanisms. The results of our studies with one of novel MSC type cells: Skeletal muscle-derived stem/progenitor cells does support alternative mode of action, that MSCs improve the functional and morphological renal recovery directly, by migrating and populating the renal cortex. This debate is not only the academic issue. The answer facilitates translation from the very beginning, enabling developer specify the potency of the product, later the dose definition, magnitude and dose response.
Xue Bin
Nanjing University School of Medicine, China
Title: PP2Acα positively regulates mice liver regeneration termination through AKT/GSK3β/Cyclin D1 pathway
Biography:
Bin Xue has completed his PhD from Nanjing Normal University and was a Visiting Scholar at Harvard School of Medicine. He is the Director of Nanjing University School of Translational Medicine Lab. He has published more than 25 papers in reputed journals.
Abstract:
Background & Aims: Liver injury triggers a highly organized and ordered liver regeneration (LR) process. Once regeneration is complete, a stop signal ensures that the regenerated liver is at appropriate functional size. The inhibitors and stop signals that regulate LR are unknown, and only limited information is available about these mechanisms.
Methods: A 70% partial hepatectomy (PH) was performed in hepatocyte-specific (PP2Ac_-), deleted (PP2Ac_-/-) and control (PP2Ac_+/+) mice. LR was estimated by liver weight, serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST) levels and cell proliferation; and the related cellular signals were analyzed.
Results: We found that the catalytic subunit of PP2A was markedly up-regulated during the late stage of LR. PP2Ac_-/- mice showed prolonged LR termination, an increased liver size compared to the original mass and lower levels of serum ALT and
AST compared with control mice. In these mice, cyclin D1 protein levels, but not mRNA levels, were increased. Mechanistically, AKT activated by the loss of PP2Ac_ inhibited glycogen synthase kinase 3 (GSK3beta) activities, which led to the accumulation of cyclin D1 protein and accelerated hepatocyte proliferation at the termination stage. Treatment with the PI3K inhibitor wortmannin at the termination stage was sufficient to inhibit cyclin D1 accumulation and hepatocyte proliferation. Conclusions: PP2Ac_ plays an essential role in the proper termination of LR via the AKT/GSK3/Cyclin D1 pathway. Our findings enrich the understanding of the molecular mechanism of LR termination control and provide a potential therapeutic target for treating liver injury.
Jaroslaw Fabis
Medical University of Lodz, Poland
Title: Rotator cuff tear and regenerative medicine - present state of the art and future
Biography:
Jaroslaw Fabis is the Head of the Department of Arthroscopy, Minimally Invasive Surgery and Sport Traumatology of Medical University of Lodz, Poland. He is a Member of many scientific societies and has got a distinction to be the corresponding Member of the ASES. His latest scientific activities and publications are focused on “molecular and structural aspects of tendon, muscle, menisci and cartilage degenerative process and their regenerative capabilities”.
Abstract:
From epidemiological point of view, rotator cuff injury is the third orthopaedic entity after spine and arthritic changes. It is connected with loss of functional independence of hand due to shoulder dysfunction. The aim of rotator cuff reconstruction is to restore the muscle function which is the key target of the operation. The proper understanding of mechanism of muscle atrophy and degeneration is connected with extensive investigation of two phenomena’s. The first is physiological sarcopenia and the second is acceleration by tear of tendon. However, in spite of current knowledge and improvement of surgical technique, the rate of recurrence of tear after reconstruction is extremely high. Therefore, it is nothing strange that surgeons and scientists are looking for help coming from rapidly growing medical field-regenerative medicine. There are three key structures related to application possibilities of regenerative medicine-tendon, muscle and bony bed. In all, three cases are of key importance-proliferation, apoptosis and autophagy of tenocytes, muscle cells and osteoblasts as well as production and degradation of extracellular matrix. All these processes influence each other on the way multi-molecular feedback modified by inflammation and oxidative stress. The current approach to this issue are stimulation of healing process by platelet rich plasma and selected growth factors, blocking of pro-inflammatory cytokines and selected molecules as well as receptors, antiinflammatory cytokines, implementation of mesenchymal stem cells and different scaffolds. All these methods are separate research areas of regenerative medicine and their skillful combination of connection opens up new horizons.
Shan Ping Yu
Emory Univerisity School of Medicine, USA
Title: Optogenetic stimulation of glutamatergic neuronal activity in the striatum enhances neurogenesis in the subventricular zone of normal and stroke mice
Biography:
Shan Ping Yu has received his PhD from Stony Brook University and Post-doctoral training in Neuroscience from the Howard Hughes Medical Institute. He is currently the O Wayne Rollins Endowed Chair Professor at Emory University. He has published more than 120 peer-reviewed papers in reputed journals such as Science, PNAS, Journal of Neuroscience, FASEB Journal, Journal of Cerebral Blood Flow and Metabolism, Cell Death and Differentiation and Neurobiology of Diseases and Stroke. He has been serving as an Editorial Board Member of more than 10 scientific journals.
Abstract:
Neurogenesis in the sub-ventricular zone (SVZ) of the adult brain may contribute to tissue repair after brain injuries. Although the regulation of neurogenesis by molecular genes and signal pathways has been extensively investigated, especially in the dentate gyrus (DG) of the hippocampus, whether SVZ neurogenesis can be regulated by neuronal activities is not well defined. Using the spatial and cell type specific optogenetic technique combined with multiple approaches of in vitro, ex vivo and in vivo examinations, we showed morphological and functional evidence of a novel neuronal link between the striatum and SVZ. Transgenic mice expressing the light-gated channelrhodopsin-2 (ChR2) channel in glutamatergic neurons, optogenetic stimulation of the glutamatergic activity in the striatum triggered glutamate release that consequently evoked membrane currents, Ca2+ influx and increased proliferation of SVZ neural stem cells, mediated by AMPA receptor activation. In ChR2 transgenic mice subjected to focal ischemic stroke, optogenetic stimuli to the striatum not only promoted cell proliferation but also the migration of neuroblasts into the peri-infarct cortex with increased neuronal differentiation and improved long-term functional recovery. These data provide the first morphological and functional evidence showing a unique striatum-SVZ connection that up-regulates SVZ neurogenesis and may be a therapeutic target for promoting adult neurogenesis and brain tissue repair.
Sandeep Shrivastava
Datta Meghe Institute of Medical Sciences, India
Title: An ideal solution for wound management led by regenerative medicine product
Biography:
Abstract:
Introduction: People tend to get injured, leading to wounds with losses of multiple tissues including skin, subcutaneous tissue, btendons and bones. There effective management is a complex process, but the outcomes many a time remain unpredictable. The complications involve further tissue loss, infections, and non-healing ulcers leading to huge morbidity. Throughout the world large resources have been spent, consuming billions of dollars, towards manage these wounds and lessen the morbidity. A simple therapy for effective wound management if evolved will transform this health problem and save lot of sufferings.
Aim: To study an ideal solution for wound management led by regenerative medicine product.
Method: The “Sandeep’s Technique for Assisted Regeneration of Skin” (STARS) is a therapy for complete healing of wounds with autologous self activated platelet rich plasma (PRP), imparted as local subcutaneous infiltrate in the wound margin or underneath the necrotic flap, on every 4th day till complete regeneration takes place and wound heals. The wounds were dressed daily/alternate day with only moist saline. It is a prospective case series study of 75 wounds associated with problems such as compound fracture, amputations, infections, post surgical necrotizing flaps treated with STARS, at Acharya Vinobha Bhave Rural Hospital, J N Medical College, Wardha, India.
Findings: The final outcome was complete/near complete healing of all the wounds without requiring any surgical or intense medical intervention, with a near normal skin including sole, with minimum of scar just like primary healing.
Interpretation: The STARS technique for PRP led wound healing in acute wounds is a safe, easily reproducible and widely accessible way of treating even complex wounds. It can be imparted in a very standard manner across the entire health care centre from territory to primary, without any risks. It needs just a little training towards PRP preparation and a low cost centrifuge machine. The results are predictable and good quality wound healing is ensured with control of infection and Pain. It obviates the need for surgical, medical interventions and intense local care. STARS may be the turning point in the history of wound management. A regenerative product (autologous PRP), is being used widely and easily, to overcome one of the largest problem of the humans; hoping to bring relief to millions who continue to suffer because of affordability and accessibility of expert health care. It is single, simple, affordable and effective therapy for wound management, just as an ideal treatment should be.
Hans-Georg Simon
Northwestern University, USA
Title: Dynamic remodeling of extracellular matrix instructs regenerative cell behavior
Biography:
Hans-Georg Simon has completed his PhD at the University of Freiburg, Germany and after Post-doctoral training at Harvard Medical School, USA, he has research experiences in “academic and industrial settings”. Being a Developmental Biologist for over two decades, he is investigating the reactivation of developmental programs as a mechanism to restore damaged or missing tissues and/or organs. He has won Marcus Singer Award for excellence in Regeneration Research.
Abstract:
The ability to functionally repair tissues damaged by disease or injury remains a significant challenge for regenerative medicine. While tissue repair is limited in higher vertebrates, particular in humans, regeneration of complex tissues occurs widely throughout the animal kingdom. Employing multiple regeneration-competent species in a comparative and complementing manner is currently providing a blueprint for regeneration at the cellular and molecular levels. Using new t and zebrafish model organisms, we are investigating the underlying principles that control the differentiated state of the cell and regulate regenerative processes. Performing multi-tissue microarray analyses, we have recently discovered concerted gene activities in different tissue types indicative of a molecular signature of regeneration. We have demonstrated a key role for the extracellular matrix (ECM) at the wound site, revealing that the transition from a stiff structural ECM environment to a softer, regulatory matrix and then back to the default stiff matrix of differentiated tissues is a critical driving force for regeneration. Employing novel 3D-imaging techniques to regenerating skeletal and cardiac muscle and explanting muscle cells into defined environments, we generated experimental evidence for distinct ECM components providing biochemical and mechanical signals that cooperatively regulate muscle regeneration. Using a cross-disciplinary approach incorporating developmental biology, cell signaling, and material sciences, we are now leveraging the gained knowledge towards engineering artificial matrices as a mimetic of the natural regeneration-specific ECM. We will discuss our progress towards deciphering the matrix code to unlock dormant regenerative abilities in mammals and develop new strategic opportunities in regenerative medicine.
Ken Yaegaki
Nippon Dental University School of Life Dentistry, Japan
Title: Regenerated liver tissues derived from human tooth treat swine liver failure induced by progressive nonalcoholic fatty liver disease
Biography:
Yaegaki K is a Doctor of Dental Science. He has completed his PhD in Medicine from Kureme University Medical Biochemistry and Post-doctoral studies from University of British Columbia. He was trained as Oral Maxillofacial Surgeon at School of Medicine Kurume University. His specialty was facial injuries and cancer. He is the Director and Head of Oral Health at Nippon Dental University, which is the oldest dental school in Asia, also a Dean of PhD program. He has published more than 100 papers and 20 books. He has been serving as an Editorial Board Member of repute.
Abstract:
One of the reasons to limit the liver transplantation is fewer available organs than number of the patients on the waiting list. The liver regeneration might be one of the alternatives of the transplantation. Several clinical studies with employing the transplantation of mesenchymal stem cells from blood, adipose tissue or others were reported. Transplantation of those cells might show decline of hepatic reserve function rather than treating conditions of the liver. The objective of adult stem cell transplantations might be to launch “bridge to transplant” strategy rather than treating liver condition. We have shown that human dental pulp stem cell involves potential to treat lethal liver disease. Hence, we have previously treated the biliary liver cirrhosis and acute liver injury in nude rats with transplanting the regenerated liver tissues which were originated from human dental pulp. Nonalcoholic fatty liver disease (NAFLD) has been ascertained as one of the most prevailing liver condition. Hence, the objectives of the research was to evaluate the clinical potential of our transplantation protocols using swine model of progressive liver failure developed from NAFLD. After four weeks of transplantation into six swine with the condition, secondary liver in the spleen and the regenerated liver were produced. Epithelial cells of biliary ducts were partially replaced with human cells. Serum albumin level recovered from 1.5 g/dL to over 3.0 g/dL. Other factors, i.e. HPT, choline esterase, collagen type IV, ALT etc were also improved, although any of them in the positive control has not been changed.
Roberta Di Pietro
Gabriele d’Annunzio University, Italy
Title: Mapping of the human amniotic membrane: A morpho-functional study to better understand amniotic membrane stem cells regenerative capacity
Biography:
Roberta Di Pietro has obtained her degree in Medicine cum Laude in 1985 and the Specialization in Sports Medicine cum Laude in 1988 from University of Chieti, Italy. She has worked as a Visiting Scientist at the Biochemistry Department, AFRC, UK, at the Pathology Department, USUHS, USA and at the Institute of Human Virology, University of Maryland, USA. In 2005, she became Full Professor of Histology and Embryology at the University of Chieti. She has joined the Editorial Board of Current Pharmaceutical Design as an Executive Guest Editor and recently, the Editorial Academy of the International Journal of Oncology as an Honorary Member. She is an author of 176 scientific publications plus international e-book chapters, editorials, Italian textbooks and 1 Italian patent.
Abstract:
The amniotic membrane (AM) is the innermost part of the placenta, in direct contact with the amniotic fluid. In recent years, the interest toward placenta stem cells has been increasingly growing. At present, two main stem cells populations have been identified in AM: Amniotic epithelial cells (AECs) and amniotic mesenchymal stromal cells (AMSCs). Although AM is an excellent source of cells for regenerative medicine, also due to its immune-modulatory properties and low immunogenicity. Thus, the aim of our study was to map the human AM under physiological conditions to identify possible differences in structural features and regenerative capacity of its components. Human term placentas were collected from healthy women after vaginal delivery or caesarean section at Fondazione Poliambulanza-Istituto Ospedaliero of Brescia or at the SS. Annunziata Hospital of Chieti. Samples of AM were isolated from four different regions according to their position relative to umbilical cord (central, intermediate, peripheral and reflected). By means of immunohistochemistry, morphometry, flow cytometry, electron microscopy, CFU assays and AECs in vitro differentiation we demonstrated the existence of different morphofunctional features in the different regions of AM, highlighting that AECs are a heterogeneous stem cell population. This should be taken into account to increase efficiency of amniotic membrane application within a therapeutic context.
Hongman Wang
Peking University Health Science Center, China
Title: Social collaboration network analysis of English literature on animal-derived regenerative implantable medical devices
Biography:
Abstract:
The collaboration network of English publications on animal-derived regenerative implantable medical devices based on tissue engineering technology and its evolving processes and current states were mapped in this paper. 10159 English papers published before 1st January 2015 were obtained in eight databases. Social network analysis was conducted on these papers by utilizing UCINET software and Statistical Analysis Software for Informetrics (SASI) researched and developed by Peking University. The collaboration network has evolved from scattered formation to single-core dominated, and then to a core-edge one. Collaboration has become more frequent and wider. Network density and centrality have decreased. USA, UK and China are the top three countries with Wake Forest University, Harvard University and Tufts University being the top three contributing institutions cooperated mostly during the period during 2010 to 2014. In conclusion, more collaboration among different institutions and countries is needed. Edge institutions and developing countries should expand their scope of collaboration.
Olivia Candini
University of Modena and Reggio Emilia, Italy
Title: REGENERAGING: From miRNA fingerprint of aged progenitors to ex-vivo reprogramming strategies for improved MSC performance and therapeutic potential
Biography:
Olivia Candini is a Post-doctoral Associate in the Laboratory of Cell Therapies of the Department of Medical and Surgical Sciences at the University of Modena, Italy. Since last 5 years she has been working with mesenchymal stem cells (MSC) to better understanding the impact of aging on progenitor properties. Based on her combined expertise in cell and molecular biology, she is therefore deeply engaged in innovative approaches to enhance MSC performance and skeletal regeneration.
Abstract:
It is known that progenitor cells undergo an age-dependent decline in their number and function resulting in tissue aging and disease. Since their ex vivo isolation has been introduced in regenerative medicine, these impairments may limit stem cells performance ex vivo and possible after transplantation. Therefore, we considered that the identification of possible molecular fingerprints driving aging can contribute in better age-related disease understanding and in generating tools to favor ex vivo progenitor performance for improved therapeutic benefits. Starting from an age-related comparison of a know stem cell type, we identified aged progenitor- specific miRNA signature that involves only 7 microRNA. Focusing on their targets, we selected HOXB7 as age related gene and whose expression was inversely correlated with senescence. Forced HOXB7 expression was associated with an improved cell growth, a reduction of senescence and an enhanced osteogenesis, linked to a dramatic increase of autocrine bFGF secretion. Based on these original observations we proposed an ex vivo HOX-based reprogramming strategy aimed to empowering key features of mesenchymal adult progenitors for innovative approaches of tissue regeneration and repair.
Zhong Wang
University of Michigan Medical School, USA
Title: Heart regeneration with cardiac progenitor cells and engineered ECM mimicking carriers in large animal models
Biography:
Zhong Wang has completed his PhD from Oregon Health and Science University and Post-doctoral studies from University of California, Berkeley. He was a Principal Investigator at Massachusetts General Hospital, Harvard Medical School and Harvard Stem Cell Institute before he joined the Department of Cardiac Surgery, University of Michigan, USA.
Abstract:
Cell-based therapy represents a highly promising approach for the treatment of heart diseases but its validation requires extensive preclinical studies. Major challenges include lack of clinically relevant large animal reporter models, the identification of ideal cell source, and the extremely low retention and survival rates of transplanted cells. To address these critical challenges in heart regeneration, we have generated stable and high-level expression reporter swine and rabbit animals. For the first time in the field, we characterized and targeted the porcine ROSA26 (pROSA26) locus and generated ROSA26-EGFP swine reporters readily inducible by Cre expression. These swine reporters will enable precise quantification of transplanted cells versus host cells. We also generated knock-in pigs containing Cre-T2A-tdTomato at endogenous ISL1 locus, which allow us to trace the specification and reactivation of ISL1+ CPCs in pig hearts. Meanwhile, we have established cutting-edge injectable cell microcarriers for tissue regeneration. In particular, we have developed new nanofibrous hollow microspheres (NF-HMS) that mimic the extracellular matrix architecture at the nanometer scale. Building on pioneering works in cardiac stem cell field, we are able to robustly generate embryonic cardiac progenitor cells (CPCs) from pluripotent stem cells for heart regeneration. Our results show that NF-HMS greatly enhances the CPC retention, survival, and integration in infarcted hearts of large animals. Our progress using these combined approaches in heart regeneration will be presented. Our integration of advanced cell source, biomimetic carrier, and large animal models for heart regeneration should provide general principles in developing an informative model system for regenerative medicine.
Christopher J Centeno
Centeno Schultz Clinic, USA
Title: Safety and clinical efficacy from a non-profit stem cell registry tracking >5,000 orthopaedic patients
Biography:
Abstract:
The Interventional Orthopedics Foundation Registry was first founded in 2005 to track patients treated with culture expanded, bone marrow mesenchymal stem cells, as well as bone marrow concentrate (BMC). It is the largest and oldest clinical registry in existence in the arena of orthopedic stem cell therapy. 15 clinical studies have been published from this prospective dataset including large scale safety (n=2372) of all tracked treatments, the efficacy of BMC and fat graft for knee OA (n=681), BMC for hip OA (n=196) and BMC for shoulder OA and rotator cuff tears (n=102). Several other small case series have been published in the areas of stem cell treated knee anterior cruciate ligament (ACL) tears, hand osteoarthritis, and fracture delayed and non-union. In addition, a dosing paper for knee arthritis has also been published showing a lower limit of cellular content needed to provide functional relief. This lecture will review this published data as well as additional non-published data culled from the registry. The preliminary results of three new randomized controlled trials on the use of a specific protocol of BMC to treat knee osteoarthritis, shoulder rotator cuff tears, and knee ACL tears will also be reviewed.
- 3rd workshop on Stem Cells Applications in Regenerative Medicine, Flow Cytometry and Medical Tourism
Location: Kiel 1-3
Session Introduction
Vasiliki E. Kalodimou
IASO Maternity Hospital, Greece
Title: Isolation of mesenchymal stem cells for the treatment of lung fibrosis in an animal model
Biography:
Vasiliki E Kalodimou is the Director of the Flow Cytometry-Research and Regenerative Medicine Department at IASO Hospital in Athens, Greece. She has studied and worked with progenitor cells from placenta, umbilical cord and adipose tissue along with their applications in regenerative medicine and flow cytometry. She has publications in these fields, including Research Fellowships. She has published 2 books about flow cytometry, the Greek edition was published in 2010 and in 2013 the book was published from AABB Press USA. In 2015 she published her 3rd book, “A Handbook to Mesenchymal Stem Cells in Regenerative Medicine”. She is a Flow Cytometry/Stem Cell Specialist, Leader at AABB CT Subsection: CT Product Manufacturing and Testing-USA, Scientific Consultant in Regenerative Plastic Surgery Institute/Pure Aesthetics, Brazil, AABB Assessor-USA and Editor in 12 scientific journals, Editor-in-Chief in 4 scientific journals and her biography was included in Who’s Who in The World 2014, 2015 & 2016 edition.
Abstract:
Background: Recent reports have shown that mesenchymal stem cells (MSC’s) could be used for transplantation in various animal models. Mesenchymal stem cells exhibit remarkable plasticity and harbor potential for use in therapeutic applications, such as lung fibrosis.
Aim & Method: The aim of this study was to isolate mesenchymal stem cells from rat bone marrow, count the actual MSC’s numbers and their viability using flow cytometry and infuse them on an experimental injured animal model. We used magnetic beads (MACS) as a delivery system for novel mesenchymal stem cells (MSC’s) isolated from rat bone marrow and the total number was counted using a Beckman Coulter FC 500 flow cytometer.
Results: Bone marrow samples from 60 Wistar rats, >250 g and six weeks old, were used for the isolation of MSC’s. All samples were stored at room temperature and processed immediately. The MSC’s were isolated and the absolute numbers of MSC’s as well as the viability of each sample was determined using flow cytometry. We used trypan blue to distinguish the viable cells and the mesenchymal cells for microscopic analysis as well.
Conclusion: We succeeded to isolate MSC’s from all 60 samples with a mean value of 1.14x106, while the number of unsorted bone marrow cells required for a transplant is 1.05x106 by bibliography. We found that the mean viability value of the samples was 77.6% suggesting good sample collection and processing conditions.
Efi Roboti
University of Athens, Greece
Title: Female genital and vaginal rejuvenation by infusion of adipose mesenchymal stem cells
Biography:
Efi Roboti has over 28 years of experience in healthcare sector. Her clinical practice in Athens currently provides Gynecological-Obstetrics (with over 3200 successful child deliveries) and anti-ageing services to over 15000 patients from Greece and neighboring countries.
Abstract:
Women today live almost half their lives in menopause. Post-menopausal women, those who had breast cancer, cervical and uterine cancer and ovarian cancer have intense symptoms of atrophy after chemotherapy, radiotherapy or pharmaceutically induced early menstruation cessation i.e. dryness, a burning feeling, irritation, painful intercourse and frequent urinary tract infections. The rejuvenation of their genitalia and the vagina will help to dramatically improve the quality of their lives. Our aim is to prove that the infusion of mesenchymal stem cells contained in adipose tissue has an important contribution and long-term results: In appearance and function of the skin and mucosa of the external female genitals and the vagina; to reduce pain in women with dyspareunia; at the entrance of the vagina showing thinning of the epithelium and
adhesions of granulation tissue; to reduce urinary incontinence (from stress incontinence) and the improvement or treatment of lichen sclerosus of the vulva to restore the quality of life and sexual function in the affected women.
Nikolaos G Tsamopoulos
Mediteranneo Hospital, Greece
Title: Venous neurovascular pathways to neuroinflammation in glaucoma
Biography:
Nikolaos G Tsamopoulos has completed his Medical studies at the University of Rome, Universita Degli Studi di Roma, La Sapienza, where he was awarded his MD degree. He has completed his Fellowship in Interventional Neuroradiology at Ospedale Niguarda Granda di Milano at the Interventional and Therapeutic Neuroradiology Department. In 1999, he was graduated from the Hellenic Naval Reserve Officers Academy. In 2005, he has accomplished stage in Neurosciences at the Centre Hospitalier Sainte Anne in Paris. In 2008, he has completed the full cycle of the International Diploma in Neurovascular Diseases, sponsored by the Paris Sud University. In 2011, he was awarded Doctor of Philosophy (PhD) at the National and Kapodistrian University of Athens Medical School. Since 2010, he is the Director of the Interventional Neuroradiology Department. In 2014, he became the Project Coordinator of Health Care Research and Technical Development Projects at The National Technical University of Athens (NTU), Greece.
Abstract:
We proposed a new model of optic nerve damage in glaucoma, the model of venous neurovascular pathways to neuroinflammation in glaucoma, based on the theory that glaucoma is a neurodegenerative disorder and optic nerve is amenable to damage imposed by factors affecting the central nervous system. Percutaneous venous transluminal angioplasty appears to be effective and feasible with a high degree of procedural success. PVTA seems to positively influence the clinical status by improving the mean deviation (MD).The results are encouraging and bring promise of a safe and effective approach to adjustment therapeutic approach for patients with chronic open angle glaucoma and moderate to severe visual field defects, with intraocular pressure controlled in the low teens. However, randomized controlled trials will be needed to provide true efficacy and safety data, to convince the clinicians and to become a more high level, evidence-based guideline recommendation.
Biography:
Isavella Mitrou has studied International & European Politics at the University of Piraeus and continued with an MA in International Studies-Diplomacy at the University of Birmingham and an Executive MSc in European Studies at the Economics and Business University of Athens. She has attended a summer school on Human Rights at the University of Birmingham. After an Internship at the Greek MFA in the Directorate for International Organizations, she started working at the Marketing and Sales Department of a leading medical group in Athens. After deciding a change on her career, she focused on the field of medical tourism and she has been certified on the field.
Abstract:
Research on stem cells has greatly progressed over the past few years. In the beginning, it seemed as something unreachable but the breakthroughs achieved, such as the first transplant of stem cells origin have proven us wrong. Although this innovative field expands throughout the globe, there are still difficulties on its further expansion. On the other hand, medical tourism has lately been considered as a field where a substantial profit can be achieved. Patients from all over the world, seek treatment in other countries taking different aspects into consideration such as expenses and the quality of the services provided. Traditionally advanced countries in medicine, such as the US, have received enormous numbers of international patients for consecutive years, but lately these figures have spread out across many smaller countries due to the changes in legislation and the advances they have achieved. Combining the innovations in stem cells’ research and the promising future they hold, extremely successful companies focusing on research have been created, raising the expectations into a higher level.
Georgia Tsakona
Expert in Hospital Economics/Research, Greece
Title: Hospital research & blue economy
Biography:
Georgia Tsakona studied Economics Accounting at the Greece business administration, University of Patras. She continued attending educational training programs: 410 hours H/Y; 175 hours Business Administration; 50 hours development of personal skills and 50 hours working time management and stress. From 2004 to 2008 she was a Teacher in Charge of Administrative Economic Department of the Technical Institution of Professional Training (IEK). Simultaneously, she worked in civil service center (CSC) at Nafplio-Greece. Since 2008 she works as an Office Responsible Personal Presidential Secretary, in the fields of social partners' Federation of Professionals, “Craftsmen and Merchants Argolidas ". For the last few years, she is focusing in the field of hospital economics and research and in the field of blue economy and hospital research.
Abstract:
The field of regenerative medicine is comprised of an estimated 120 public and 600 private companies as well as a plethora of universities. This vital community of major research institutions and companies are succeeding in advancing both the basic science and its translation into clinical testing and commercial products. In a Blue Economy, the current unsustainable models of production and consumption will be outdated and eliminated. A vicious cycle of over-exploitation of labor and the Earth, with an ever-increasing burden of carbon emissions, will cease. It will become a virtuous cycle of using what is available, increasing social capital incrementally and bringing innovations to the marketplace that help meet the basic needs of all. The blue economy can enhance our lifestyles, benefit our planet and use and conserve materials and energy in remarkable ways.
Eleni Triantafyllou
National and Kapodistrian University of Athens, Greece
Title: The importance of umbilical stem cell storage with a comparison between private and public banks, and their uses
Biography:
Eleni Triantafyllou graduated from the Department of Biological Applications and Technologies, University of Ioannina, Greece. She performed on thesis with title: "Investigation of post-transcriptional regulation factors of gene expression in brain tumors". She is now a Post-graduate student in Master’s Program in Reproductive and Regenerating Medicine. She always had a strong interest in Regenerative Medicine as well as Genetics and Biotechnology.
Abstract:
A cord blood bank is a facility which stores umbilical cord blood for future use. Cord blood stem cells are blood cell progenitors which can form red blood cells, white blood cells, and platelets. This is why they are currently used to treat blood and immune system related genetic diseases, cancers and blood disorders. Furthermore, recent studies have shown that cord blood has unique advantages over traditional bone marrow transplantation, particularly in children, and can be lifesaving in rare cases where a suitable bone-marrow donor cannot be found. Public cord blood banks function like public blood banks, in that they accept donations from anyone, discard donations that fail to meet various quality control standards and use national registries to find recipients for their samples. Matches are most likely to be better in a public than a private bank. One disadvantage is that they do not charge storage fees and so medical centers do not always have the funds required to establish and maintain them. Traditionally, public cord blood banking has been more widely accepted by the medical community. Private cord blood banks store cord blood solely for potential use by the donor or donor’s family. However, because of its cost, limited likelihood of use and inaccessibility to others, private banking is not usually recommended to low-risk families. Moreover, cord blood from private banks is more likely to suffer from various problems such as potential lower quality control and lower medical usefulness of using a patient’s own potentially diseased cord blood. Nearly, all cord blood transfusions come from public banks, rather than private banks, partly because most treatable conditions can’t use one’s own cord blood.
Alexandra Baranowski
Cambridge University, UK
Title: The uses of adipose-derived mesenchymal stem cells
Biography:
Alexandra Baranowski is currently studying Biological Natural Sciences at the University of Cambridge, UK. She has spent a month in Madagascar over her penultimate summer of school researching on the Behavioral Patterns of the Coquerel’s sifaka lemur, to contribute to the conservation efforts of local and international scientists stationed there. She is presently in the Committee of the Hellenic Society of Cambridge University.
Abstract:
Adipose-derived stem cells (ASCs) are most commonly obtained from white adipose tissue, and exhibit multi-potency, displaying osteogenic, myogenic, adipogenic and chondrogenic properties. As a result, ASCs are becoming progressively more promising for the treatment of debilitating diseases such as cardiovascular conditions and diabetes mellitus, and starting to play a fundamental in the field of regenerative medicine and tissue engineering. Perhaps one of the main areas of interest concerns gynecological applications whether this is for the regeneration of tissue following a mastectomy or vaginal rejuvenation, the hope is for long-term effects that will replace current limited techniques, and dramatically improve the lives of post-menopausal women in particular.
- Biomaterials and Bioengineering
Location: Kiel 1-3
Chair
Andrzej Lange
Polish Academy of Sciences, Poland
Co-Chair
Hazem Barmada
Mississippi Stem Cell Treatment Center, USA
Session Introduction
Narendra Saxena
Datta Meghe Institute of Medical Sciences, India
Title: Re-engineering the sole defects with “STARS†technique
Biography:
Abstract:
Introduction: Normal sole is a very specialized skin, customized to bear weight. It is limited to be only present on flexor/volar aspect of feet. A partial loss of sole is not uncommon and can happen as a result of trauma, diabetes or tropical ulcer, etc. Such loss is irreparable as it is not possible to do surgically; or otherwise, reconstruct it by transferring cross sole flap will lead to huge donor site morbidity. In selected cases, a partial thickness grafts or free/rotational skin flaps from other sites was done to overcome such losses. But these are susceptible to failures leading to recurrences, infections, dehiscence, etc., leading to morbidity and losses. In many other cases, such as diabetes/tropical ulcer amputation may be resorted for cost-effective rehabilitation.
Aim: The aim of the study is to re-engineer the sole defects with “STARS” technique.
Method: The authors have developed a technique using the autologous platelet cells in PRP form for regenerating and engineering the growth of normal sole in such condition. It is “Sandeep’s Technique for Assisted Regeneration of Skin” (STARS) for complete healing of wounds with autologous self activated Platelet Rich Plasma (PRP). This technique involves the autologous PRP local infiltrate in the wound margin on every 4th day, till complete regeneration takes place and wound heals. The wounds were dressed daily/alternate day with only moist saline. This is an early disclosure of 12 prospective case associated with ulcers/ wounds of sole.
Findings: The observations in terms of diagnosis, age, sex, defect sizes, number of therapeutic STARS sessions and final clinical outcomes were disclosed. All defects of sole, healed to normal/near normal clinical features on count of thickness, color and sensitivity. In addition, randomized histopathological biopsies from such engineered sole was done and studied for micro logical characteristics, which also shows the normal HPE regeneration of sole, in contrast to natural healing which demonstrates a cicatrized tissue base.
Interpretation: With the STARS technique led by PRP gradual normal sole reconstruction is possible despite co-morbidities. It is a safe and effective regeneration modality, without in-tense surgical and medical intervention. This is perhaps revolutionary and was not possible earlier. A complete healing to normalcy of a specialized skin such as sole by an autologous regenerative medicine is a giant step forward and such clinical reengineering will shape the future of therapeutic handling of regenerative medicine products towards previously thought irreparable damages/losses, including sole.
Samar Hassab-Allah Kassem
October 6 University, Egypt
Title: Regenerative potential of some natural products: Implications in health and diseases
Biography:
Samar Hassab-Allah Kassem has completed his PhD in Biochemistry from Helwan University. She has got 3 diplomas in Nutrition, Laboratory Analysis and Education. She is a Lecturer of Biology, Biochemistry and Ecology at the 6 October University, Egypt. She has worked as an Associate Professor of Health Science, Biochemistry and Nutrition at Dammam University, KSA (2012-2013). She was responsible for designing the Strategic plan for Faculty of Physical Therapy and was Ex-director of Community Service at the Faculty of Physical Therapy. She has published 8 papers in local and international journals and has been invited for Board Membership in Clinics on Oncology, USA.
Abstract:
Regenerative therapy is very promising approach, but should not be limited to stem cell transplantation as its applications are restricted by number of limitations; and should instead seek for a strategy that retrieves the initial healing capacity of a tissue,. In this regard, endogenous activation of stem cell recruitment and their homing into the injury sites is a promising approach for therapeutic purposes. We have previously shown that Avemar and Echinacea effectively induce mobilization and homing of CD34+ stem cells to myocardial tissue and modulate the pro-inflammatory cytokines which may help in the repair of cardiomyocytes. They might be taken as prophylactic or as adjuvant therapy in those individuals at high risk to develop MI, as well as in MI patients. Our study offers novel insights into the extraordinary regenerative capacity of natural products. This study can be extended to encompass other natural products and their effects on degenerative diseases. So, evaluation of their implications in health and diseases is an urgent need as the number of patients with preventable degenerative diseases is growing. This review will discuss how can we select and use them efficiently. It will also update our present knowledge about the potential benefit of specific dietary interventions combined with specific natural products as non-pharmacological tool for preventing and combating such degenerative disorders. Some terms relevant to stem cell biology like cell tolerance, resistance, adaptation and behavior need to be redefined.
Eliska Mazl Chanova
Institute of Macromolecular Chemistry ASCR, Czech Republic
Title: Multi-functional biomimetic surfaces of PLA based biomaterials created by printing of functional PLAb- PEO colloids
Biography:
Mazl Chanova E has completed her PhD in early 2011 from the Institute of Macromolecular Chemistry AS CR (IMC), Prague under the auspices of the University of Chemistry and Technology, Prague, Czech Republic. She is a Member of the Department of Bioactive Polymers at IMC, a leading polymer institute in the central Europe. She is interested in the biomimetic surface modification, cell-surface interactions and surface analytic techniques of biomaterials. She has published more than 12 papers in reputed journals.
Abstract:
A specific distribution of cell-adhesion structures, such as RGDS-peptide, over the biomaterial surface and the synergy with other signaling bio-motifs play a crucial role in regulating cell-biomaterial interactions in tissue engineering. In this study, we investigate the creation of surfaces with single peptide nano-clusters with different spatial distribution and multi-functional surfaces with at least two different peptides nano-clusters, which were prepared by deposition of functionalized PLA-b-PEO. The model surfaces were prepared by spin-casting of PLA-b-PEO copolymer colloidal solutions with selected composition of non-functionalized, maleimide-functionalized and alkyne-functionalized copolymers on a PLA film. The surfaces were grafted with RGDS, KRSR and KRTGQYKLGSKTGPGQK peptides via Michael addition and azide-alkyne cycloaddition. The second end of the peptide chains was flanked with biotin which was used for determination of peptide surface distribution by visualization of streptavidin-labelled gold nanospheres (A-Au NS, 40 nm) selectively bound to biotin using AFM. The concentration of peptides was determined by radioactivity measurements of analogous peptides with iodine label. The surfaces were tested in cell tissue cultures with bone, endothelial and stem cells. The selected surfaces cultured with osteosarcoma MG63 cells were tested under dynamic condition. PLA-b-PEO copolymers in selective solvents form self-assemblies, surface deposition of which results in nanoscale-organized surfaces. Using the deposition of various ratios of functionalized and non-functionalized nano-colloids, the surfaces with overall RGDS-peptide concentration in the range of 8.5 to 15.5 pmol/cm2 and peptide cluster distance from 320 up to 1250 nm were obtained. The effect of RGDS clusters distance, synergic effect of additional peptide sequence as well as the influence of mechanical loading on cell response will be demonstrated.
Celine Furne
NAMSA, France
Title: Functionalized collagen conduit implantation in a paraplegic rat model
Biography:
Abstract:
Introduction: Limited regeneration occur spontaneously following spinal cord injury (SCI). Biomaterials hold great promising for the regeneration of many tissues including spinal cord (SC). The neurograft collaborative consortium proposed a novel micro-porous collagen conduit to restore SC functions. The conduit was designed to create a bridge across the lesion and provide a trophic support to the survival of neurons and axons outgrowth. The conduit was tested in a new paraplegic rat model that mimicked irreversible acquired paraplegia and in a rat transection model.
Methods: Paraplegia was induced in a rat model by a contusion at thoracic vertebra T9. Four weeks after contusion the injured portion of the SC was removed and replaced by the conduit (conduit), transected without implantation (transection control) or left untreated (contusion control). The motor functions were evaluated for 8 weeks after implantation using the Basso, Beattie and Bresnahan (BBB) rating scale. The inflammation and regeneration of the SC with/without conduits were investigated using histopathologic evaluation. The conduit was also combined with mesenchymal stem cells (MSC) and tested in single transection model. The transection was performed at T9 and the SC was implanted with the conduit (conduit), the conduit combined with neural/glial-differentiated MSC (conduit+MSC) or left empty (control transection). SCI regeneration was evaluated similarly over 12 weeks. The conduit was tested for its biocompatibility following ISO 10993 standard for irritation, cytotoxicity, acute systemic toxicity, degradation kinetic and genotoxicity.
Results: The conduit demonstrated its biocompatibility in all testing performed according to ISO 10993 standards. Its degradation kinetic was compatible with in vitro culture of MSC, allowing conduit functionalization before in vivo implantation. Its degradation kinetic was also compatible with the SC regeneration process, given that, after treatment period, the conduit was adherent to the surrounding spinal cord and restored the physical continuity of the spinal cord. Independent of the paraplegia model tested, BBB evaluation demonstrated no significant improvement of motor functions following implantation of the conduit, with or without MSC. The histopathologic evaluation is under process.
Discussion & Conclusion: To achieve cellular regeneration and functional recovery upon SCI has been a demanding challenge leading to the development of highly complex therapeutic systems including a biomaterial device with specific characteristics and bioactive agents (cells/ molecules). Such systems should ensure suitable mechanical properties, cell-adhesion, electrical activity and biodegradability. While these parameters have been seized within neurograft development, no motor function was restored after transection+conduit implantation; demonstrated by the BBB rating evaluation. Independent of the in vivo model used, outcomes were equivalent. Regeneration of the spinal cord is still being investigated by extensive histopathologic analysis for further understanding of the ongoing repair mechanisms and future fine-tuning of the therapeutic system. Nevertheless, the neurograft conduit has demonstrated its biocompatibility, becoming valuable as a scaffold to test other combination of active molecules and/or stem cells.
Elisa Maillard
University of Strasbourg, France
Title: Islet transplantation: Input of biomaterials for islet survival
Biography:
Elisa Maillard has completed her PhD from Strasbourg and Post-doctoral studies from Oxford University. She has worked on both basic research and clinical islet
isolation and culture. She is the Lab Manager of the European Center of Diabetes Study. She has published 13 articles in reputed journal such as Biomaterials.
Abstract:
Islet transplantation is a promising and minimally invasive therapy to restore normoglycaemia in brittle type 1 diabetic patients. However, the procedure is pancreas consuming since 2 to 3 pancreas are needed for a single patient. Therefore,efforts in research are focusing on improvement of islet survival during the process to decrease pancreas requirement. The stressful event of islet/exocrine separation deprives cells from extracellular matrix contact and oxygen supply; which are two of the major reasons of the loss of approximately 60% of islets. Interest had risen over the last couple of years in biomaterials in islet transplantation regarding transplantation, but also for the culture steps. The uses of biomaterials to create an artificial environment for islets post isolation increase their survival and improve transplantation outcome. In the same way, oxygen provider arouses enthusiasm of the community, and numerous teams tested the beneficial effect of oxygen supply from the pancreas retrieval to islet implantation step. The combination of both agents showed a real benefit for islet viability and function in vitro, providing more robust islet for sustaining the transplantation event. In vivo study highlighted several problems with transplantation sites, the liver. Indeed depending upon the material used, the inflammatory reaction is triggered. Therefore,alternative sites are investigated today; with, in particular, the omental pouch which gives the opportunity to keep matrices post implantation.
Biography:
Mohamed Hamdy Doweidar is an Associate Professor at the Mechanical Engineering Department, University of Zaragoza, Spain. Besides, he is a Member of the Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN) at the Aragon Institute of Engineering Research (I3A) and the European Society of Biomechanics (ESB). He has participated in many national and international investigation projects. He has authored and co-authored many books and numerous articles in international journals. His investigation interests include computational biomechanics, cell simulation, finite element method, natural element method and computational fluid dynamics.
Abstract:
The mechanical stimulus is one of the essential stimuli for cell differentiation and/or proliferation. One of the recent challenges is how to apply this stimulus in a local and remote regimen. In this study, we proposed a pioneer approach to apply a mechanical local cell stimulus in a remote manner via encapsulated magnetic nanoparticles exposed to a magnetic field. This technique can help in an effective way to control the tissue regeneration process within the human body. The proposed strategy is formulated within a previously developed three-dimensional (3D) computational model, which is here extended, to study the cell behavior when it senses local changes in the mechanical properties of its extracellular matrix. We assumed that the cells are cultured within 3D nonlinear hydrogels, which is modeled as Neo-Hookean hyperelastic material. A comparison between the cell behavior within a force-free and force-induced substrates has been done for neurogenic (0.1-1 kPa), chondrogenic (20-25 kPa) and osteogenic (30-45 kPa) extracellular matrix. Our findings show that mesenchymal stem cells differentiation and proliferation can be triggered by inducing its substrate with an internal force. They need a longer time to grow and maturate within force-free substrates than within force-induced substrates. Besides, at the instance of mesenchymal stem cells differentiation into a compatible phenotype, the magnitude of the net traction force increases within chondrogenic and osteogenic substrates while it reduces within neurogenic substrates. This is consistent with experimental studies and numerical works recently published by the same authors. However, in all cases the magnitude of the net traction force considerably increases at the instant of cell proliferation because of cell-cell interaction.
David Salamon
Brno University of Technology, Czech Republic
Title: Direct building of 3D microchannel structure for nutrients delivery
Biography:
David Salamon has completed his PhD from Slovak Academy of Sciences and Post-doctoral studies from Stockholm University. He has worked 4 years at University of Twente, Netherlands and joined newly opened Central European Institute of Technology at Brno University of Technology in year 2012 as a Researcher. He has published more than 23 papers in journals, one book chapter and his research activity is mainly in area of processing of advance ceramic materials.
Abstract:
Next generation of the hard tissue scaffolds will be made to accommodate nutrient channels to support cells live inside of the 3D scaffold. Nowadays, diffusion through scaffold and a tissue usually limits transport, and forms potentially hypoxic regions. Hydroxyapatite is biocompatible material that supports cell adhesion and proliferation, therefore ideal for the preparation of bone grafts. Furthermore, chemical stability of this bioceramic material allows stable liquid flow through a porous structure. In this study, a 3D hydroxyapatite structure containing microchannels via microtemplating was prepared. Coating: The method uses micro fibers coated by hydroxyapatite suspension, which are sintered to achieve micro-channels and replicate shape of the fiber. High mechanical flexibility in the green stage allows direct shaping into 3D structure. Sintered structures contains asymmetric membrane walls with flux suitable for nutrition delivery, which keeps microchannels for nutrition support and waste removal separated from cell growth area. The metabolic activity of the cells was determined and the cell morphology was visualized. The ability for these structures to support cell adhesion and proliferation was shown to be favorable over a period of 7 days. The presented straightforward concept for building 3D structure containing tailored microchannels should be suitable especially for bioreactors applied as a bone grafts.
Elena Afrimzon
Bar-Ilan University, Israel
Title: Efficient approach to 3D breast cancer structure formation and growth in vitro, in environments of varying rigidities
Biography:
Elena Afrimzon has completed her PhD from Central Institute of Immunology, Microbiology and Infectious Diseases (Alma-Ata, Kazakhstan). She is Senior Researcher at the Biophysical Interdisciplinary Jerome Schottenstein Center for the Research and the Technology of the Cellome, Department of Physics, Bar-Ilan University. She is the initiator of the development and utilization of a novel hydrogel micro-chamber array for protracted culturing of live cells and 3D multicellular objects, which permits kinetic live cell studies. She has published more than 25 papers in reputed journals.
Abstract:
Biological tissues normally possess varying levels of rigiditiy, which contribute to the performance of their physiological functions. Changes in tissue rigidity may reflect transformation from a normal to a pathological state. Cancer cells within the tumor are influenced by the mechanical conditions of their microenvironment, which can drive cell fate. Multicellular three-dimensional models provide a more suitably organized, in vivo-like structure, and respond better to external stimuli than 2D cultures. In the present study, we propose a efficient approach to mimic the desired surrounding rigidity in vitro for 3D breast cancer object/structure formation and growth. Non-adherent, non-tethered 3D objects were generated from single cells within a hydrogel array, cultured under various mechanical conditions and measured at single-object resolution exploiting the advantageous mechanical and optical properties of agarose. This study demonstrates differences in the in vitro development of 3D breast cancer structures under various rigidity conditions. Study of individual 3D breast cancer structures reveals that significant differences in object growth rate, morphology and vital features are associated with the extent of environmental rigidity, the point in time at which a change occured and the initial number of seeded cells. The 3D objects initiated from less than six cells are significantly different from those initiated by more cells and demonstrate a growth rate independent from surrounding rigidity. Additionally, the control culture of 3D objects grown freely under low-rigidity conditions lacks the specific subset of the preinvasive phenotype which developed in the stiffer surroundings.
- Mesenchymal Stem Cells
Location: Lubeck
Chair
Susan D Reynolds
Nationwide Children’s Hospital and The Ohio State University, USA
Co-Chair
Jan Kriz
Institute for Clinical and Experimental Medicine (IKEM), Czech Republic
Session Introduction
Hajime Ohgushi
Ookuma Hospital, Japan
Title: My clinical experiences using autogenic and allogenic bone marrow mesenchymal stem cell (MSCs)
Biography:
Hajime Ohgushi has completed his MD in 1976 and PhD from Nara Med University in 1980. He was a Research Associate in the Department of Biology at Case Western Reserve University USA from 1985 to 1987, Lecturer and Assistant Professor in Department of Orthopedics, Nara Medical University from 1989 to 2000.Currently, he is the Head of the Orthopedics and Deputy Director at Ookuma Hospital. He has more than 200 publications mostly related to tissue engineering/regenerative medicine and total citations are more than 10000.
Abstract:
In our body, cells having self-renewal and multi-differentiation capabilities exist in many tissues and the cells are called adult stem cells. It is well known that one of the stem cells (mesenchymal stem cells;MSCs) reside in bone marrow tissue. Number of the MSCs is very low; however the number increases after in vitro culture expansion. The cultured MSCs are currently used for various tissue regenerations in clinical settings. We have started their clinical applications towards bone tissue regeneration since 2001. We have also treated patients having cartilage damage. The MSCs used are derived from patient’s bone marrow, thus we use autogenic MSCs for the treatment. The autogenic cells do not induce transplantation immunity and can be used without fear of donor derived infection. However, autogenic MSCs cannot be used for the patients having genetic disorder which cause impairment of the targeted tissue regeneration. For example, for the purpose of bone tissue regeneration, if the patients have mutations of bone tissue-related genes, autogenic cells are hard to be used for treatments of his/her bone fragility. One of the bone-related gene is alkaline phosphatase (ALP), which is necessary for bone tissue development. The patients having the gene mutation of the ALP (Hypophosphasia) cause skeletal abnormalities resulted in short limbs and soft skull bones. Due to impairment of osteoblastic differentiation capability of the patient MSCs, we have used allogenic MSCs for treatments of the patients. This presentation summarizes clinical experiences using autogenic/allogenic MSCs for the purpose of various tissue regenerations.
Brian M Mehling
Blue Horizon International, LLC, USA
Title: Clinical applications of mesenchymal stem cells
Biography:
Brian M Mehling is a practicing American Orthopedic Trauma Surgeon, Researcher and Philanthropist. He has started his path in medicine through undergraduate study at Harvard University obtaining Bachelor of Arts and Master of Science degrees in Biochemistry from Ohio State University. Completing his Degree of Medicine at Wright State University School of Medicine, he received his Post-graduate education through Residencies and Fellowships at St. Joseph’s Hospital in Paterson, NJ and the Graduate Hospital in Philadelphia, PA, while pursuing a PhD in Chemistry. He operates his own practice, Mehling Orthopedics, in both West Islip, NY and Hackensack, NJ.
Abstract:
Musculoskeletal conditions are the most common cause of severe long-term pain and physical disability, and they affect hundreds of millions of people around the world. Osteoarthritis (OA) is the most common form of arthritis and the leading cause of chronic disability. OA is estimated to affect 630 million people worldwide. OA is characterized by degeneration of articular cartilage, limited intra-articular inflammation with synovitis and changes in peri-articular and subchondral bone.BHI Therapeutic Sciences offers a novel method of arthritis therapy using a patient’s own stromal vascular fraction (SVF) cells including mesenchymal stem cells. The therapy is available at Malacky Hospital in Slovakia. Malacky Hospital is staffed with expertly-trained medical professionals and is one of the premiere hospitals in Central Europe. Blue Horizon International Slovakia is licensed by the Ministry of Health of Slovak Republic to provide adipose stem cell treatments for orthopedic joint applications - knees, hips, shoulders and ankles. Procedures utilize cutting-edge technology and adult stem cells only. In 2015,73 patients underwent the therapy with own stromal vascular fraction cells. 64 patients have follow-up evaluation results.Affected area includes knees (37 patients), hips (25 patients) and hips and knees (2 patients). Results from patients’ follow-up examinations and MRI scans showed that stem cell therapy was safe for the patients. Follow-up examination results conducted 10 days, 3 and 6 months after treatment have shown significant improvement of clinical condition relating to pain relief, improved mobility, which was shown also on the follow-up MRI scans of the affected joints.
Michael Weber
International Society for Medical laser Applications, Germany
Title: External and invasive laser stimulation of intravenously and intra-articulary applied mesenchymal stem cells and PRP in regenerative medicine
Biography:
Michael Weber completed his Diploma in Chemistry and Biochemistry from the University of Marburg in Germany and Medical studies from University of Göttingen,Germany. From 1974-1976, he was High School Teacher in Chemistry, Biology and Physics. From 1984-1987, he was Assistant Doctor at University clinic of Göttingen. He is authorized Educator for general medicine, natural medicine and acupuncture by the government medical association in Hannover, Lower Saxony.He is a President of the American Association of Biological Laser Therapy and Acupuncture (AALA) and President of the International Society for Medical Laser Applications (ISLA). He is a Board Member of NAALT (North American Association for Laser Therapy) and Co-editor of the Journal "Pain and Acupuncture".
Abstract:
In this study, new methods of laser therapy will be presented for use in regenerative medicine. Laser needles with different wavelengths and penetration depths can be used externally as a highly effective and pain free method for pain management.Laser needles can be applied on all parts of the body. Infrared lasers can penetrate the skull bone and are used today for benefit on brain diseases. However, penetrating laser light also initiates mitochondrial stimulation with tissue regeneration.Intravenous laser therapy is a systemic application of laser light with infrared, red, green, blue and yellow wavelengths. This method stimulates the immune system, leads to an improved microcirculation and oxygen supply and improves endurance in sports people. Endogenous stem cells released from the bone marrow will be stimulated in the blood stream and leads to improved organ function. Interstitial and intra-articular laser therapies are new methods using a fiber optic catheter application of different lasers in the depth of the tissue or directly in joints close to the spot of injury. It is successful in treatment of herniated, nerve injuries and advanced osteoarthritis of the knee, shoulder, hip and other joints. Lasers can also invasively stimulate PRP and stem cells in joints or in the blood stream. They have excellent effects on tissue regeneration because they provide light of all spectral colors for stimulation of the mitochondria by enhancing ATP-production. So laser light activates intravenously or intra-articulary applied mesenchymal stem cells with better survival and differentiation.
Ryang Hwa Lee
Texas A&M Health Science Center, USA
Title: TSG-6 as a biomarker to predict efficacy of human mesenchymal stem/progenitor cells (hMSCs) in modulating sterile inflammation in vivo
Biography:
Ryang Hwa Lee is an Assistant Professor of Medicine at the Institute for Regenerative Medicine, Texas A&M University System Health Science Center. She has earned her PhD in Physiology from School of Medicine, Pusan National University in 2003 on the “Characterization of human adipose and bone marrow derived mesenchymal stem cells (MSCs)”. In 2003, she joined the Center for Gene Therapy at Tulane University Health Sciences Center as a Post-doctoral Fellow for a continuous study on MSCs with Dr. Darwin Prockop, a pioneer in the MSC field. She has joined the Institute for Regenerative Medicine in 2008 as a Research Scientist and the Faculty of Texas A&M Health Science Center in the year 2009. Currently, her research group focuses on investigating the underlying cellular and molecular mechanisms of therapeutic effects of MSCs in animal models of human diseases including sterile inflammation-mediated injury, type 1 diabetes and cancer.
Abstract:
Human mesenchymal stem/progenitor cells (hMSCs) from bone marrow and other tissues are currently being administered to large numbers of patients. The trials are proceeding even though cultures of the cells are heterogeneous, and there is large variability among preparations of hMSCs due to differences among donors, culture conditions, and inconsistent tissue sampling. This is also confounded by the lack of definitive biomarkers to predict the efficacy of hMSCs in vivo. Therefore,the value of the data obtained from current clinical trials could be compromised by variations in the quality of the hMSCs employed. To ensure such trials continue generating quality data, there is a critical need for simple in vitro bioassays to predict hMSC efficacy in vivo. This presentation will provide the first biomarker that can predict the efficacy of hMSCs in suppressing sterile inflammation in vivo.
Biography:
Karen Coopman is a Senior Lecturer in Biological Engineering at Loughborough University. Based at the Centre for Biological Engineering, her research team focuses on “the manufacture of cell-based therapies, tackling issues from scale-up to cryopreservation”. She is also the Director of the Loughborough led EPSRC/MRC Centre for Doctoral Training in Regenerative Medicine and a Member of the BBSRC led Bioprocessing Research Industry Club Steering Group.
Abstract:
With the growth of the cell-based therapy industry, one of the key challenges in the field is the successful preservation of these therapies in order to enable centralized manufacture of an 'off-the-shelf ' allogeneic product. Data from our work on human mesenchymal stem cells (hMSCs) is now emerging which shows the impact that changes in downstream processing (e.g. cell harvesting from microcarriers, washing and re-suspending cells in cryopreservation medium) can have on cell recovery post-thaw despite a consist freezing process being utilized. The idea of optimizing each unit operation in isolation will therefore be questioned and the necessity for end-to-end process design discussed.
Irina Aizman
SanBio, Inc., USA
Title: Cell injury-induced release of FGF2: An overlooked factor in MSC implantation
Biography:
Irina Aizman has completed her PhD from Tel Aviv University and since then worked as a Research Scientist in California at Fibrogen and SanBio. Currently, she is an Associate Director of Research at SanBio.
Abstract:
Beneficial effects of intracerebral implantation of mesenchymal stromal cells (MSC) and their derivatives are believed to be mediated mostly by factors produced by these cells. However, mesenchymal cell engraftment does not occur, and the majority of cells disappear within a week of implantation. Here, we provide in vitro evidence that dying implanted cells can affect surrounding tissues by releasing their intracellular components. We found that FGF2 and FGF1, but not VEGF and MCP1, levels were high in extracts of mechanically damaged (freeze/thaw) cells despite being low in conditioned media (CM). Extracts induced concentration-dependent proliferation of rat cortical neural progenitor cells (NPC) and human umbilical vein endothelial cells (HUVEC); these proliferative responses were specifically blocked by FGF2-neutralizing antibody. In the neuropoiesis assay with rat cortical cells, both MSC extracts and killed cells induced expression of nestin, but not astrocyte differentiation. However, suspensions of killed cells strongly potentiated the astrogenic effects of live MSC. In implantationrelevant MSC injury models (peripheral blood cell-mediated cytotoxicity and high cell density plating), MSC death coincided with the release of intracellular FGF2. The data showed that MSC contain a major depot of active FGF2 that is released upon cell injury and is capable of acutely stimulating neuropoiesis and angiogenesis. We therefore, propose that both dying and surviving implanted MSC contribute to the tissue regeneration.
Lucilla Lecchi
Milano Cord Blood Bank, Italy
Title: An update on methods for cryopreservation and thawing of hemopoietic stem cells
Biography:
Lucilla Lecchi has completed her Degree in Biological Sciences at the University of Milano, Italy. She is the Processing Facility Director of the Milano Cord Blood Bank and responsible of the laboratory for cryopreservation of HPC-A/HPC-M at Centro Trasfusionale Fondazione IRCSS Ca’ Granda Ospedale Maggiore Policlinico, Milan,Italy. She has published more than 59 papers in reputed journals.
Abstract:
This presentation will focus on critical issues related to stem cells cryopreservation procedures of minimally manipulated products containing allogeneic or autologous hematopoietc progenitor cells (HPC). The issues include: Regulations and standards, process design, process validation and qualification, volume reduction, cell concentration, cryoprotectants and cryopreservation, storage, warming events, quarantine, cross contamination during storage and thawing. New approaches of processing are developed such as automatic devices for volume reduction and high cell concentration in the frozen product.DMSO at 10% final concentration is still the most used cryoprotectant for HPC cryopreservation. Although controlled rate freezing is the recommended method for HPC cryopreservation, alternative methods may be used. Last generation vapor storage vessels ensure temperature stability better than older tanks. Moreover, advantages and disadvantages of thawing procedures carried out at the patient’s bedside or in the laboratory will be discussed.
Biography:
Noel D is currently a Research Director in the Inserm Institute for Regenerative Medicine and Biotherapies in Montpellier. She has received her PhD from Bordeaux University in 1992. She then completed Post-doctoral studies at the Institute of Molecular Genetics in Montpellier in the field of Recombinant Retrovirology and Gene Therapy. Since 1999, she works on mesenchymal stem cells and their applications in the treatment of osteo-articular diseases. She has published more than 138 papers in reputed journals and has been serving as Editorial Board Member.
Abstract:
Because of immune-modulatory and trophic properties, mesenchymal stem/stromal cells (MSC) appear as a promising treatment for systemic sclerosis (SSc), a rare intractable disease with fibrosis-related mortality. While autologous approaches could be inappropriate because of alterations in SSc-MSCs, we evaluated allo- and xenogeneic approaches in the relevant hypochlorite (HOCl)-induced murine model of diffuse SSc, recapitulating the main features of the disease. Therefore, we investigated the effect of murine and human (h) MSC in the HOCl-induced SSc model. Subcutaneous fat being an accessible source of MSC, we also compared human bone marrow (BM-MSC) with adipose-derived MSC (ASC). We therefore assessed the effect of BM-MSC from syngeneic BALB/c, allogeneic C57BL/6 mice and xenogeneic hBM-MSC or hASC (3 donors each) in HOCl-challenged mice. We demonstrated that allo- and xenogeneic BM-MSC were as effective as syngeneic BM-MSC in decreasing skin thickness, expression of Col1, Col3, a-SMA and collagen content in skin and lungs. Compared with hBM-MSC, hASC induced a similar reduction in Col1 and a-SMA expression, but a stronger reduction of TNFa, IL1b, and enhanced ratio of Mmp1/Timp1 in target tissues. This therapeutic efficacy was mainly associated with paracrine activity since MSC did not migrate to the skin. Our results indicated similar therapeutic effects using allo-/xenogeneic BM-MSC while hASC displayed potent anti-inflammatory and remodeling properties. Considering heterogeneity between MSC sources and samples, potency assays are needed to optimize MSC-based therapy outcomes in SSc.
Fumio Arai
Kyushu University, Japan
Title: Function of Pot1 in the maintenance of hematopoietic stem cell activity under stress
Biography:
Abstract:
Hematopoietic stem cells (HSCs) are responsible for blood cell production throughout the lifetime of an individual.However, aging or repeated cell division induces the accumulation of DNA damage, which impairs HSC self-renewal and differentiation capacities. Here, we show that protection of telomeres 1a (Pot1a), a component of shelterin, improves HSC activity under stress. We identified that Pot1a was highly expressed in HSCs, yet this expression declines with age. Knockdown of Pot1a in young HSCs increased DNA damage response (DDR) at telomeric region and induced age-related phenotypes,marked by reduced long-term reconstitution activity and myeloid-biased differentiation. In contrast, overexpression of Pot1a or treatment with exogenous Pot1a protein prevented telomeric DDR and maintained HSC self-renewal activity and rejuvenated the activity of aged HSCs. In addition, we found that the transduction of Pot1a into LT-HSCs reduced production of reactive oxygen species compared with control, indicating the possibility that Pot1a implicates in the energy metabolism of HSCs.Furthermore, human POT1 protein also increased the number of cord blood HSCs. These results indicate that Pot1a/POT1 has an important role in the maintenance of stem cell function under stress condition and can be used to expand functional HSC numbers ex vivo.
Vsevolod A Tkachuk
Moscow State University, Russia
Title: Mesenchymal stromal cells in blood vessels and axons growth
Biography:
Vsevolod A Tkachuk has completed his PhD from Moscow State University and DSc from Russian Cardiology Research Center, Moscow. He is a Professor of Biochemistry, Director of Institute of Regenerative Medicine and Chair of Biochemistry and Molecular Medicine in Moscow State University. He has published more than 250 papers in reputed journals and has been serving as an Editorial Board Member of repute.
Abstract:
We investigated effects of adipose derived human mesenchymal stromal cells (MSC) on ischemic limbs of nude mice.Data obtained demonstrate formation of new arterioles and nerve growth with cells and proteins originating from mice. Using of the medium obtained after MSC growing had the same effect on ischemic limbs but stability of new formed arterioles and nerves was much less than after using MSC. It means that MSC stimulates angiogenesis and nerve formation via secretory mechanism, but direct interaction of MSC with ischemic tissue stabilizes regenerated tissue. Proteomic analysis demonstrated secretion by MSC number of angiogenic and neurotrophic factors, as well as matrix metalloproteasis and matrix proteins, anti-inflammatory cytokines and chemokines. Using neutralized antibodies, we demonstrated involvement of some of these proteins in angiogenesis and axons growth. At the same time, exclusion of microvesicles and exosomes from this medium blocked both angiogenic and neurotrophic effects, and using of exosome fraction reconstruct action of medium on ischemic limb regeneration. Such phenomenon can be explained by action of microRNA included in exosomes, since some anti-microRNA block physiological action of exosomes. Treatment of MSC with PDGF or bFGF dramatically changes spectrum of proteins secreted by MSC and spectrum of microRNA included in exosomes as well as physiological effects exosome fraction on blood vessel growth and stability. In our report, we will also discuss the role of MSC in stroma formation of tissues, effect of MSC on some adult stem cells and T-lymphocytes.
Jiunn-Jye Sheu
Kaohsiung Chang Gung Memorial Hospital, Taiwan
Title: Combined therapy with shock wave and autologous bone marrow-derived mesenchymal stem cells alleviates left ventricular dysfunction and remodeling through inhibiting inflammatory stimuli, oxidative stress & enhancing angiogenesis in a swine myocardial infarction model
Biography:
Jiunn-Jye Sheu is a Cardiovascular Surgeon in Kaohsiung Chang Gung Memorial Hospital, Taiwan. He has completed his graduation from Taipei Medical University.Currently, he is pursuing his PhD with major research focused on “plasma generating machine and its wound healing effect”. He has published more than 75 scientific papers in PubMed. His research interest includes heart remodeling and heart muscle regeneration.
Abstract:
Background: We hypothesized that combined therapy with shock wave (SW) and autologous bone marrow-derived mesenchymal stem cells (BMDMSCs) are superior for alleviating left ventricular (LV) dysfunction.
Methods & Results: Male mini-pigs (n=30) equally divided into group one (sham control), group two [Acute myocardial infarction (AMI) by left coronary artery ligation], group three (AMI-SW), group four (AMI-BMDMSC) and group five (AMISW-BMDMSC) were sacrificed by day 60 and the hearts were collected for studies. Baseline LV injection fraction [LVEF (%)] and LV chamber size did not differ among the five groups (p>0.5). By day 60, LVEF was highest in group one and lowest in group two, significantly higher in group five than that in groups three and four, and significantly higher in group four than that in group three (p<0.001). Cellular and protein levels of VEGF, CXCR4, and SDF-1α were significantly increased progressively from groups one to five (all p<0.05). Small vessel number and protein expressions of CD31 and eNOS were highest in groups one and five, lowest in group two, and significantly higher in group four than those in group three (p<0.001). Protein (MMP-9, TNF-1α and NF-κB) and cellular (CD14+, CD40+) levels of inflammatory biomarkers, protein expressions of oxidative stress (oxidized protein, NOX-1, NOX-2), apoptosis (Bax, caspase-3, PARP), infarct size, and LV dimensions showed a pattern opposite to that of LVEF among all groups (all p<0.001).
Conclusions:Combined SW-BMDMSC therapy is superior for improving LVEF, reducing infarct size and inhibiting LV remodeling.
Susan D Reynolds
Nationwide Children’s Hospital and The Ohio State University, USA
Title: Stem cell treatments for lung disease
Biography:
Susan D Reynolds has completed her PhD in 1992 from the University of Rochester with a Specialization in Developmental Biology and Post-doctoral studies in Lung Stem and Progenitor Cell Biology from the University of Rochester, School of Medicine. She is currently a Principal Investigator at Nationwide Children’s Hospital. She has published more than 70 papers in reputed journals and has been serving as a Reviewer for multiple scientific journals and granting agencies.
Abstract:
Cell therapy has the potential to cure disease through replacement of malfunctioning cells. While the tissue stem cell (TSC) is thought to be the optimal therapeutic cell, transplantation of TSC/progenitor cell mixtures has saved lives. We previously purified the mouse tracheobronchial epithelial TSC and reported that in vitro amplification generated numerous TSC. However, these cultures also contained TSC-derived progenitor cells and TSC re-purification by flow cytometry compromised TSC self-renewal. These limitations forced us to determine if a TSC/progenitor cell mixture would repopulate the injured airway epithelium. We developed a clinically-relevant transplantation protocol and demonstrate that transplanted mouse and human tracheobronchial epithelial TSC/progenitor cell mixtures are 20-25% of airway epithelial cells, actively contribute to epithelial repair and persist for at least 43 days. Two weeks after transplantation, TSC/progenitor cells differentiated into the three major epithelial cell types: Basal, secretory, and ciliated. We concluded that adult tracheobronchial TSC/progenitor cell is an effective cell therapy.
Valerie Trichet
Nantes University School of Medicine, France
Title: Interaction of mesenchymal stem cells with primary bone tumor cells: Potential implications according to the tumor resection status
Biography:
Valerie Trichet has completed her PhD from Rennes University and Post-doctoral studies from Edmonton University, Canada and Nantes University, France. She is an Associate Professor at the Faculty of Medicine, University of Nantes in France. She has joined the Laboratory of the Pathophysiology of Bone Resorption (INSERMUMR957) in the year 2006. Her current research interests are focused on understanding the role of Mesenchymal Stem/Stromal Cells in Bone Regeneration and in Primary Bone Tumors.
Abstract:
Conventional therapy of primary bone tumors includes surgical excision with wide resection, which leads to physical and aesthetic defects. For reconstruction of bone and joints, allograft can be supplemented with mesenchymal stem cells (MSCs) or adipose-derived stem cells (ADSCs). Additionally MSC-like cells may be used in tumor-targeted cell therapy.However, we wanted to know whether MSC-like cells may have adverse effects on osteosarcoma development. MSCs/ADSCs were co-injected with human MNNG-HOS osteosarcoma cells in immunodeficient mice and have accelerated the local tumor growth. This pro-tumor effect may be due to MSC/ADSC secreted factors as the in vitro proliferation of osteosarcoma cells was increased up to 2 folds in the presence of MSC/ADSC-conditioned medium. Because of the enhancing effect of MSCs on in vivo/in vitro proliferation of osteosarcoma cells, MSCs may not be good candidates for osteosarcoma-targeted cell therapy. In contrast, MSC-conditioned medium did not change the dormant, quiescent state of osteosarcoma cells cultured in oncospheres.This result indicates that MSC-secreted factors may not be involved in the risk of local recurrence and that MSCs may be safe in tissue reconstruction following bone tumor treatment.
- Bone Tissue Engineering | Scaffolds in Regenerative Medicine
Location: Lubeck
Chair
Danièle Noel
INSERM, France
Co-Chair
Hans-Georg Simon
Northwestern University, USA
Session Introduction
Menemşe Gümüşderelioglu
Hacettepe University, Turkey
Title: Boron-doped bone scaffolds
Biography:
Menemse Gumudderelioglu is a Professor at Hacettepe University, Chemical Engineering Department since 1998. She has completed her BSc, MSc and Doctorate degrees from the same department. Her main research subjects are biomaterials, controlled release technology, animal cell biotechnology and tissue engineering.She has completed her research studies at London University, Birkbeck College, Harvard University, Medical School, Tufts University and Stratchlyde University. She has more than 100 papers in international peer reviewed journals.
Abstract:
Although boron (B) is increasingly identified as an element that has many benefits especially on bone health, limited number of studies that are investigating the effects of B in osteoblasts in cellular/molecular level are available. Therefore, the exact mechanism of B on bone health is still unknown. However, it is known that B has an important role on the metabolism of calcium, magnesium, vitamin D and steroid hormones which have many indirect effects on bone. The aim of this study was to develop boron-containing polymeric scaffolds to promote regeneration of bone tissue. The scaffolds were prepared by using two different approaches: Embedding of boric acid encapsulated nanoparticles into the scaffolds to achieve sustained B release; combining of polymeric scaffolds with B containing hydroxyapatite (HAp) that is produced by microwave-induced biomimetic method. The scaffolds were produced and characterized in terms of structural properties and in vitro B-release patterns. The effect of released B on the osteogenic activities of MC3T3-E1 preosteoblasts and mesenchymal stem cells derived from bone marrow and adipose tissue, seeded into the scaffolds was investigated in vitro. The results were evaluated with respect to cell viability, bone related ECM gene expressions, and cellular morphology. In conclusion, the cell culture studies proved that the encapsulated boron within the scaffolds can be used as an osteoinductive agent by showing its positive effects on the proliferation and differentiation of MC3T3-E1 cells and MSCs.
Andrew R Cohen
Drexel University, USA
Title: Measuring development and potential using computational analysis of live cell and tissue microscopy images
Biography:
Andrew R Cohen has joined the faculty in the Department of Electrical and Computer Engineering at Drexel University as an Associate Professor in August 2012.Before coming to Drexel, he was an Assistant Professor at the University of Wisconsin-Milwaukee. He has received his PhD from the Rensselaer Polytechnic Institute in May 2008. He was previously employed as a Software Design Engineer in the DirectX group of Microsoft where he designed operating system software for gaming applications. He is an Associate Editor in the Bioimage Informatics section of the journal BMC Bioinformatics and is a Senior Member of the IEEE.
Abstract:
The ability to characterize cell culture function from a combination of visual and bio-chemical assays will be a key advantage for applications in regenerative medicine. For visual analysis, microscopes are routinely able to image living proliferating cells together with vessels and organelles. The resulting images and movies capture behaviors in live tissue, preserving the cellular microenvironment and spatiotemporal dynamics of development. The imaging data can be combined together with non-imaging (*-omics) data, enabling a comprehensive study of the complex dynamics of disease and development. Transmitted light microscopy allows evaluation of the cells intended directly for therapeutic application, while fluorescence microscopy modifies samples from the cell culture but enables a more detailed bio-chemical examination. In order to make best use of this data, computational tools are required to provide a rigorous and objective characterization of the visual information content of both single images and time-lapse image sequences (movies). This talk will describe a key and under-served area of live cell microscopy–the software tools that are required for the objective and quantitative analysis of the imaging data. LEVER, (lineage editing and validation) a free and open-source collection of algorithms and software tools for measuring clonal development in 5-D images will be described and new visualizations for evaluating cell and clone development will be demonstrated. New approaches for characterizing cell culture morphology from single and time-lapse images will also be described. Examples of measuring development from microscopy images in the neural and hematopoietic systems will be shown.
Biography:
Oded Shoeyov is a Faculty Member of the Hebrew University of Jerusalem. His research is in plant molecular biology, protein engineering and nano-biotechnology.He has authored or co-authored more than 170 scientific publications and is the Inventor or Co-Inventor of 46 patents. He has received the 2012 Israel Prime Minister Citation for Entrepreneurship and Innovation. He is the scientific Founder of 10 companies; among them are Collplant Ltd., an agro-biotech/regenerative medicine company producing human recombinant type-I collagen in transgenic plants for medical implants used in tissue repair.
Abstract:
Consequential to its essential role as a mechanical support and affinity regulator in extracellular matrices, collagen constitutes a highly sought after scaffolding material for regeneration and healing applications. However, substantiated concerns have been raised with regard to quality and safety of animal tissue-extracted collagen, particularly in relation to its immunogenicity, risk of disease transmission and overall quality and consistency. In parallel, contamination with undesirable cellular factors can significantly impair its bioactivity, vis-a-vis its impact on cell recruitment, proliferation and differentiation.Large scale production of recombinant human collagen type-I (rhCOL1) in the tobacco plant provides a source of a homogenic, heterotrimeric, thermally stable “virgin” collagen which self assembles to fine homogenous fibrils displaying intact binding sites and has been applied to form numerous functional scaffolds for tissue engineering and regenerative medicine which have already reached the clinic. In addition we have shown that rhCOL1 can form liquid crystal structures, yielding well-organized and mechanically strong fibers 6 times tougher than human achiles tendon, two properties indispensable to extracellular matrix (ECM) mimicry. Combining resiline, an elastic protein derived from insects, further increased collagen fiber toughness and strain at break. Injections of fibrillated rhCOL1 combined with PRP (platlet rich plasma) to patients suffer from tendinopathy (in tennis elbow) forms in situ matrix composed of collagen and fibrin. The rhCOL1/PRP matrix reduces inflammation and promotes cell proliferation and tissue healing, promotes in situ growth factors generation and release while gradually degrading. Both in vivo and in vitro studies showed superior performance of rhCOL1/PRP compared to PRP alone.
Biography:
Antoine Alves is a Senior Pathologist and Medical Research Manager at NAMSA Lyon, France. He has more than 15 years of experience at NAMSA providing interpretation of tissue/implant interaction according to international standards under GLP conditions. Development of new histopathology procedures for adequate evaluation of medical devices and advanced therapies is one of his lines of research. He has published many papers and book chapters.
Abstract:
Cartilage, unlike bone, does not possess autogenous repair capability and has very limited ability to heal. It has been confirmed that cartilage injuries in the knee joint, if left untreated lead to more serious degenerative joint conditionsn (arthritis) and affect the activities of daily living with severe pain and dysfunction (disability). Cartiheal (Israel) recently CE marked the first in class acellular implant, Agili-C™, designed for joint resurfacing with simultaneous regeneration of hyaline cartilage and subchondral bone. The off-the-shelf implant, applied in a single stage procedure is composed of aragonite with hyaluronic acid functionalization at the cartilage phase. A long term (6 and 12 months) evaluation of the safety and efficacy in a 20 adult goats has been conducted following immediate load bearing: In the Agili-C TM group, the defects were healed and filled with a hyaline cartilage as confirmed by the marked presence of collagen type II and proteoglycans and absence of collagen type I. The subchondral plate and tidemark were reconstructed, whereas a poor repair was observed in the shamoperated group. Two clinical trials involving 148 patients showed over 24 months, a significant improvement of the primary endpoint KOOS score (pain, symptoms, quality of life) with a low rate of adverse events. Second look arthroscopies and MRI confirmed a high level of resurfacing.
Dana Kubies
Institute of Macromolecular Chemistry AS CR, Czech Republic
Title: Polymer porous scaffolds for transplantation of Langerhans Islets
Biography:
Dana Kubies has completed her PhD from the Institute of Macromolecular Chemistry AS CR (IMC), Prague, Czech Republic and Post-doctoral studies from University of Liege, Belgium. She is the Head of the Department of Bioactive Polymers at IMC, a leader polymer institute in the central Europe. She is interested in the application of polymer scaffolds in biomedical applications. She has published more than 28 papers in reputed journals.
Abstract:
The pancreatic islets transplantation (ITx) is a therapeutic alternative for patients with type-1 diabetes mellitus suffering from the hypoglycemia unawareness. The current protocol of ITx is limited, among other factors, by a suboptimal engraftment of islets after infusion into the hepatic portal vein. This results immediately in significant reduction of the graft and in unsatisfactory long-term graft viability predominantly due to an insufficient vasculature and supraphysiological nutrients,drugs and toxins concentration within portal vein blood. Therefore, a considerable effort has been spent to bioengineer an extra-hepatic transplant site rich in vasculature network similar to situation in native pancreas. We aimed to create a highlyvascularized bioartificial cavity using a macroporous polylactide-based scaffold with anisotropic channeled pores as a template,and a host body as the bioreactor. The capsular-shaped scaffolds were prepared using the Dip-TIPS method. We evaluated the effect of the scaffold pore architecture, implantation site and introduction of the vascular endothelial growth factor on the scaffold vascularization. In vivo studies (a rat model) showed the ability of the scaffold pore architecture to guide cell infiltration fully in omentum and partially when implanted subcutaneously. The in vivo magnetic resonance imaging data and immuno-histochemical analysis revealed the enhanced vascularization of the VEGF/scaffolds when compared to unmodified ones. The current study is a significant step forward in the field of biomaterial based extra-hepatic site for islets transplantation.
Yuan-shan Zeng
Sun Yat-sen University School of Medicine, China
Title: Transplantation of stem cell-derived neural network scaffold to repair transected spinal cord
Biography:
Yuan-shan Zeng is a Professor of Histology and Embryology. He has completed his PhD in Histology and Embryology from West China University of Medical Sciencesin 1991. In 1998, he took Post-doctoral fellow training at Department of Anatomy, Indiana University. He has worked as a Visiting Professor at Department of Anatomy,the Hong Kong University in 2003. He is currently appointed as Head of Department of Histology and Embryology and Vice Director at Institute of Spinal Cord Injury in Sun Yat-sen University. His research program is mainly focused on “The stem cell transplantation and mechanism of repairing of spinal cord injury”. So far, he has published more than 50 papers on international academic journals.
Abstract:
Functional deficits following spinal cord injury primarily attribute to neural cell death and loss of connectivity. Therefore,we designed tissue engineered neural network acting as bridge to rebuilt signal connection between the cut ends of the ruptured spinal cord. Adult stem cells with genetically enhanced expression of tropomyosin receptor kinase C (TrkC) were induced into neuron-like cells after co-cultured with Schwann cells over-expressing neurotrophin-3 in a gelatin sponge scaffold for 14 days. The formation of stem cell-derived neural network was confirmed by electron microscope and recording of spontaneous postsynaptic currents by whole-cell patch clamp. Then, this neural network scaffold was grafted acutely into rats with removal of 2 mm spinal cord tissue. Eight weeks later, stem cell-derived neuron-like cells of the grafts maintained their synaptic connection or formed new connection with regenerative axons. Although biotinylated dextran amine labeled fibers of corticospinal tract only formed a few connections with stem cell-derived neuron-like cells in the grafts, 5-HT labeled fibers formed much more connections. Furthermore, part of these connections was confirmed to be synaptic connections by doublelabeled immunoelectron microscope. Animals with neural network scaffold transplantation resulted in higher BBB score and were improved cortical motor evoked potential. These findings indicate that stem cell-derived neuron-like cells resulting from NT-3/TrkC-induced differentiation can partially integrate into host neural network in rat spinal cord transected. The stem cell-derived neural network in the transection site of spinal cord may accept ascending or descending neural information,meanwhile, transduct it to the host neurons located at both sides of end of the transection site.
Bipasha Bose
Yenepoya University, India
Title: CD34+/CD45- stem cells from diverse lineages and their applicability for cell therapy
Biography:
Bipasha Bose holds a PhD degree in Cancer Biology from Advanced Centre for Treatment, Research and Education in Cancer, Tata Memorial Centre, Navi Mumbai,India since 2004. She has about 12 years of Post-PhD Research Experience working in Stem Cell Biology, in academia and industry in India, Belgium and Singapore.She holds key skills in the field of clinical, as well as, R&D grade stem cells. She has several international publications and two patents to her credit. Her present focus is basic biology of adult CD34+/45- stem cells and also various aspects of ocular stem cells and cancer stem cells.
Abstract:
From the perspective of cell therapy and understanding the basic biology of adult stem cells residing in tissues of the different germline origin, we have isolated and characterized CD34+/CD45- stem cells from various organs, other than bone marrow. These studies were aimed at establishing a proof of concept for the translational applicability of such cells in preclinical animal model system. Till now, in clinical scenario, bone marrow has been the exclusive source for CD34+/CD45- for all the therapeutic applications. The advantage of using other cell types for obtaining CD34+/CD45- is avoiding the invasive bone marrow collection procedure. The presence of CD34+/CD45- cells in liver (endoderm), skin (ectoderm) and muscle(mesoderm) were established using immunofluorescence staining. The CD34+/CD45- were isolated from liver, muscle and skin using FACS sorting. Also, CD34+/CD45- cells from muscle had proven to ameliorate muscular dystrophy in mouse model of muscular dystrophy.
- Poster Presentations
Location: Foyar
- Young Researcher Forum
Location: Lubeck
Session Introduction
Claudia Tresoldi
Politecnico di Milano, Italy
Title: A predictive fluid-structure interaction approach to estimate physiological mechanical conditioning in vascular tissue engineering
Biography:
Claudia Tresoldi is currently a PhD student in Bioengineering at Politecnico di Milano, Italy, where she earned her Master’s degree. Since 2013, she has been working on a project concerning Vascular Tissue Engineering. The aim of her investigation is to develop functional small-caliber vessels able to reproduce the fetal development in vitro by coupling two different technological aspects.
Abstract:
The in vitro simulation of physiological mechanical conditioning through bioreactors plays a pivotal role in the development of functional tissue-engineered blood vessels. Thus, we developed a scaffold-specific fluid-structure interaction (FSI) model under pulsatile perfusion provided by a bioreactor in order to estimate the flow rate that ensures physiological circumferential deformations (εcirc) and wall shear stresses (WSS) on cells seeded on the tubular scaffold. The 2D-axial symmetric FSI model,computed by COMSOL Multiphysics 4.4, represents two domains: The former schematizes decellularized swine artery scaffold,defined as a linear viscoelastic material characterized by its elastic modulus and shear relaxation modulus, previously obtainedby uniaxial stretch tests. The latter domain represents the culture medium, defined as an isotropic, homogeneous, incompressible and Newtonian fluid. A pulsatile and parabolic velocity profile is prescribed at the model inlet, while calculated pressure is prescribed at the scaffold outlet. The pressure is estimated at the scaffold end by solving boundary ordinary differential equations, in relation to construct deformations and to the bioreactor downstream lumped-parameter hydraulic circuit. Our results indicate that the FSI-simulated εcirc-max and εcirc-min are statistically comparable to the experimentally estimated values at the considered flow rate, showing the maximum around 10%. The computed WSS values are in the range of 0.175-2.940 dyne/cm2. Both εcirc (≤10%) and WSS (≤20 dyne/cm2) fall within the physiological range for vascular cells. Therefore,the in silico FSI model well describes scaffold mechanical conditioning when subjected to pulsatile perfusion, properly driving its’ in vitro physiological maturation using scaffold mechanical properties obtained experimentally.
Malte Bieber
RWTH Aachen University, Germany
Title: Characterization of endoscopic cell spray for application in tubular organs
Biography:
Malte Bieber has completed his Master of Science in Engineering from RWTH Aachen University and started his PhD in July 2016 at the Institute of Heat and Mass Transfer.
Abstract:
Stem cell therapy at diseased tissue requires high local concentrations of stem cells. State of the art represents the intravenous stem cell transplantation, leading to distribution of cells within the entire body. Increase of cell concentration is exclusively achieved by utilizing tissue homing, i.e. the property of cells to autonomously migrate to afflicted tissue. An innovative approach aims at high local cell concentrations based on a minimal invasive surgery through flexible endoscopy, by spraying the cells directly onto the area of treatment. Thereby, the endoscope's working channel in combination with a commercially available catheter is utilized for injection of the liquid cell suspension and liquid atomization by a coaxial air stream. Within the realms of endoscopy, the device enables local application of cells, but currently no information is available regarding the influence of atomization parameters on cell survival. Therefore, a first-time parametric study on atomization of cell-suspensions has been performed in this study. The mutual interaction of cells and atomization is experimentally analyzed, aiming at correlations between air velocity, droplet sizes and cell survival rates. The influences of catheter flow, atomization and droplet wall interaction on cell survival are quantified and thus the extensional flow during ligament formation is identified as main cell destruction mechanism. On the basis of the present endoscopic configuration, integral cell survival rates above 80% are achieved, offering the opportunity for optimized homogeneous local coating in tubular shaped bodies.
Rajan Narayan
Indian Institute of Technology-Kharagpur, India
Title: In vivo vasculogenic potential of human umbilical vein endothelial cell microtissues: A modular tissue engineering approach
Biography:
Rajan Narayan has completed his MSc in Biochemistry from Bangalore University in 2010. He has worked as a Scientist at Biocon Limited, in Bangalore, India for a year and then joined the Department of Biotechnology, Indian Institute of Technology Kharagpur in 2011 to pursue PhD in Vascular Tissue Engineering. He has published 4 papers in journals of international repute.
Abstract:
Developing a functional three-dimensional large sized vascularized tissue has been a longstanding objective in the field of tissue engineering. Although the current strategies employed to meet this challenge give stable vessels when grown with mural cells, however it takes weeks to months to get anastomosed and perfused vasculature. Micro fabrication techniques;despite showing great potential, are expensive, requires high expertise and have employed microfluidic chip to develop small dimension vasculature. Modular tissue engineering is an emerging field that generates tissue structures from the bottom-up that mimic the intricate architecture and complexity of native organs and tissues. Vascularization by this approach has been attempted by researchers; however, this approach is not well explored. Previously, we had optimized the in vitro parameters for vascularization via this approach and have shown that endothelialization using human umbilical vein endothelial cells (HUVEC) microtissues (MTs) grown in goat tendon collagen type I-fibrin hydrogel were interconnected, branched and were stable for at least 5 days without mural cells, however; it’s in vivo validation was not performed. In the current study, an attempt was made to validate our in vitro developed 3D vasculature in an immunocompromised mouse in presence and absence of growth factors. Results showed that MTs underwent different stages of evolution and formed interconnected, anastomosed and perfused vasculature without any supporting cells within 12 days post implantation and eventually became more mature by 21 days. Immunohistochemical analysis showed that the neovessels were composed of human endothelial cells. H&E staining showed presence of mouse RBCs in the newly formed vessels, clearly indicating that anastomosis has occurred. These HUVEC MTs if grown with desired cell type may result in a functional engineered tissue construct of clinical relevance.
Nidal Ghosheh
University of Skövde, Sweden
Title: Towards the generation of fully functional human pluripotent stem cell derived hepatocytes
Biography:
Nidal Ghosheh is currently a PhD student in Molecular Biology at the Institute of Bioscience from the University of Skövde and University of Gothenburg. She is investigating the gene expression and the DNA methylation profile of the genome of human pluripotent stem cells during the differentiation into hepatocyte cells.
Abstract:
Over 600 million people worldwide suffer from chronic liver diseases. End stage liver diseases are treated mainly by organ or cell transplantations. However, shortage of transplantable donor livers requires the search for alternative treatments.Human pluripotent stem cells (hPSCs) are characterized by their unique capacities of self-renewal and differentiation into principal mature cell types of the human body. Therefore, hPSCs provide an excellent source of human cells for use in basic research, drug discovery, tissue engineering, and regenerative medicine. Human PSCs have been successfully differentiated into hepatocytes, which are the dominating functional cell type in the liver. However, fully functional hPSC-derived hepatocytes have still not been achieved. By applying a standardized protocol we have shown the synchronicity of the hepatic differentiation across several hPSC-lines. Analyzing gene expression on the global level demonstrated a high reproducibility of the differentiation procedure and revealed very low variation between biological replicates. Moreover, transcriptional comparison between hPSC-derived hepatocytes and liver tissues identified a set of genes involved in the metapathway bio transferase and oxidation by cytochrome P450 such as CYP2B6, CYP2E1, UGT2B4, FMO4, AKR1C4, and GLYAT; however that show low or no expression in hPSC-derived hepatocytes. Interestingly, some of the cytochrome P450 genes have previously shown to be down-regulated due to epigenetic regulation. Hence, further epigenetic investigation is required to understand the abnormal regulation of differentially expressed genes in hPSC-derived hepatocytes in order to develop strategies for rectifying their expression and generate fully functional hepatocytes.
Katarzyna Mazur
Technical University of Gdańsk, Poland
Title: New finite element with variable young's modulus
Biography:
Abstract:
Image of local tissue stiffness variation in one bone area is available through Computer Tomography. There is the relation between Young’s modulus and radiographic density (expressed in Hounsfield’s units) using an intermediate relation of mineral density ρ and radiological HU. Creating FEM bone model we assign one finite element to one pixel on the tomographic image. In FEM models created with this relation occur major stress concentrations areas that have no reflection in reality.Stress concentrations are caused by notches that create between elements with different Young’s Modulus (in fact bone’s density changes smoothly, in digital CT image changes stepwise). We can prevent it by making CT scans with better resolution but it entails higher radiation dose for the patient and provide no additional medical information. Our propose is to modify FEM calculations by adding to them formula describing various material properties so we get a better model with even less image resolution. This method gives very good results both in plane and solid elements.From the left, we can see high resolution (61x61 mesh) calculations results of the sample (varying properties in its volume)loaded by compressive force acting on its upper edge and supported on the opposite edge. The middle figure is FEM calculations without any changes (3x3 mesh) while on the right figure there are results of calculations with proposed changes made with the same low mesh. In a speech, we will present the results of similar calculations for solid FEM models i.e. those that have not only study but also medical use.
Shreyas Kuddannaya
Nanyang Technological University, Singapore
Title: Chemical and topographical modification of polydimethylsiloxane surfaces synergistically influence mesenchymal stem cell fate
Biography:
Shreyas Kuddannaya is currently a PhD student at Nanyang Technological University. He has completed his Master’s degree from the Delft University of Technology in Netherlands. His PhD research is focused on studying the surface-chemical and micro/nano mechanical environments on mammalian cell behavior in the context of tissue regeneration. He has published in several reputed peer reviewed journals and has presented his research in reputed platforms in bioengineering.
Abstract:
The interactive influence of chemical and topographic microenvironments in the immediate vicinity of anchorage dependent cells such as the mesenchymal stem cells (MSCs) has been a central theme of many studies involving stem cell based tissue regeneration. In this regard, the optimal adhesion of mammalian cells is critical in determining the cell viability and proliferation on substrate surfaces to facilitate long term in vitro studies on cell behavior and regenerative mechanisms. PDMS based microsystems have been greatly used for such in-vitro studies at both cellular and tissue level architectures. However, due to the inherent high hydrophobicity of a polydimethylsiloxane (PDMS) surfaces, cell culture on these surfaces is unfavorable, causing cells to eventually dislodge from the surface. Although physically adsorbed matrix proteins can promote initial cell adhesion, this effect is usually short-lived. To address this issue, a surface chemical modification of PDMS was performed for covalent immobilization of ECM proteins through (3-aminopropyl)triethoxy silane (APTES) and cross-linker glutaraldehyde (GA) cross-linking chemistry. Further, PDMS surfaces developed with micro-pillar and hole (H: 30 μm and D: 30 μm) based topographical features with grooved and non-grooved features obtained by photolithography were included in this study to study the combinatorial substratum effects on MSCs. The hydrophobicity of the native PDMS decreased significantly with the mentioned surface functionalization with a higher anchorage of ECM proteins. Both, surface chemical and topographical features resulted in an enhanced adhesion, proliferation and differentiation of mesenchymal stem cells into osteogenic lineage. We believe that these strategies could also be applied to several other substrate materials by appropriate combinations of self-assembled monolayers (SAMs), ECM proteins and substrate topography to obtain a realistic understanding of cellmicroenvironment interactions which influence critical cell behaviors in the realm of cell based regenerative therapies.
Atipat Patharagulpong
University of Cambridge, UK
Title: 3D collagen-based biohybrids for soft tissue regeneration
Biography:
Atipat Patharagulpong is currently pursuing PhD from the University of Cambridge, UK.
Abstract:
Topography and mechanical stiffness of the substrate has been shown to influence neural stem cell differentiation. Herein, near-field electrospinning (NFES) was employed to provide a topographically aligned polymeric fibrous scaffold for neural stem cell differentiation, which mimics the similar process found in the brain cortex and the peripheral neurons. Unlike conventional 3D aligned fibers, 2D NFES fibers allow progressive imaging of the cells grown on top of the fibers to study various differentiation parameters such as neurite length and the number of neurites per cell continuously. The expression profile of neuronal marker, Map2, could be used to evaluate how much the stem cells have differentiated into neurons in different scenarios. Neuronal differentiation was found to be affected by the NFES fibers’ sizes, spacing and stiffness, where there is an interesting correlation between the neurite length, the number of neurite and Map2 expression. NFES polymeric fibers were co-electrospun with carbon nanotube to build an electrode which stimulates neuronal stem cells differentiation under the application of 80 Hz sinusoid current waveform at 1.5 mA. NFES fibers could also be composited with thermo-responsive polymer which showed the cell detachment below the LCST of 22ËšC. Finally, coaxial polymeric fibers were patterned inside a microfluidics with incrementally increased spacing, to allow sustained release of the protein inside the core in a gradient fashion. With the system, neuronal migration and differentiation along the aligned nanofibers towards the gradient release of neuronal migration factor could be progressively studied.
Vincenzo De Iuliis
Universit of Chieti, “G. d’Annunzioâ€, Italy
Title: Functional interaction of the TRIM8/GERP ring finger protein with PIM serine/threonine kinases
Biography:
De Iuliis has completed his Medical School at the age of 25 years from Chieti University, Chieti, Italy. On 2013 He was accepted as a Resident in Clinical Pathology, SS Annunziata University Hospital, University of Chieti and as a postdoctoral fellow in the Department of Medical, Oral and Biotechnology Sciences. Currently he is developing bio-medical projects related to the biochemical mechanisms undergoing autophagy and apoptosis on established tumor cells. Please refer to Pubmed for his first paper as first author. In addition he has two papers in press as a first author and has submitted other five manuscripts.
Abstract:
The E3 ubiquitin ligase TRIM8 has been initially identified as a Ring finger protein expressed in glioblastomas capable of binding SOCS-1, a member of the Suppressor of Cytokine Signaling family of molecules. It has been reported by us that TRIM8 appears to be a negative regulator of SOCS-1 stability by binding to its SH-2/SOCS box domains. Moreover, recent reports have documented that nucleocytoplasmic trafficking of TRIM8 is involved in positive regulation of TNF-α induced NF-kB activation, in the stabilization of p53 on glioblastoma and clear cell renal carcinoma, and in the degradation of PIAS the negative regulator of STAT3. Here, we show for the first time that PIM serine/threonine kinases, also bind and phosphorylate TRIM8, resulting in increased stabilization of the ubiquitin ligase activity. Since SOCS-1 is functionally phosphorylated and also stabilized by PIMs, co-expression of a heterotrimeric TRIM8/SOCS-1/PIM complex promotes partial destabilization of the complexes and pursues degradation of the SOCS-1 protein. Additionally, co-expression of SOCS-1/TRIM8/PIM kinase complexes in 293T cells mitigates the repression of an interferon-γ-mediated signaling in responsive cells in vivo. These data add new partners to the complex network of protein-protein interactions that regulate SOCS-1 function and modulate the cytokine biological response. (Up to 250 words)
Julia Lerchbacher-Hieslmayr
Technical University of Munich, Germany
Title: Amniotic membrane for cartilage regeneration in a one step-method
Biography:
Julia Lerchbacher-Hieslmayr (nee Lerchbacher) has completed her masters degree in zoology (Mag. rer. nat.) at the age of 19 in 2011 from Karl-Franzens University Graz. For 3 ½ years she worked at the Research Centre of Medical Technology and Biotechnology - fzmb GmbH in Bad Langensalza (Thuringia). Currently she is doing her Ph.D. studies at the Technical University of Munich (Klinikum rechts der Isar). At present, her main interests in the field of regenerative medicine are cartilage regeneration and usability of amniotic membrane.
Abstract:
Cartilage tissue has limited healing capacity. Osteoarthritis (OA) – the most common cause of cartilage lesions – has an incidence of approximately 10% in men and 13% in women aged over 60. This is likely to increase due to aging and obesity. Current treatments include matrix-associated autologous chondrocyte transplantation (MACT) as well as in situ-induction of cartilage repair by microfracture. Therapy of cartilage defects with these methods is unsatisfying. MACT is costly and comprises the disadvantages of two separate operations. Microfracture is limited to smaller defects and known to produce fibrous cartilage. Therefore, a clear need exists for new approaches to stimulate cartilage regeneration. In our study, we investigated the usability of amniotic membrane (AM) as transplant fixation of cartilage defects (1.5 X 2.0 cm) in equine knees. Five groups (N = 6) were included, each with AM cover plus: I. Microfracture, II. Microfracture/cartilage fragments/fibrin, III. Adipose-MSCs/cartilage fragments/fibrin, IV. Bone marrow-MSCs/cartilage fragments/fibrin, and V. no filling. 6 weeks post-surgery arthroscopy was performed. 12 months post-surgery tissue was harvested including native cartilage for comparison. Analyses comprised macroscopic imaging, biomechanics, gene expression and histology. Arthroscopy showed smooth integration of the AM into the defect bed. No adverse reaction was observed during the entire study. Macroscopic analysis showed all treated defects were significantly more covered with newly formed cartilage in contrast to no filling, with best results for two defects of the bone marrow-MSCs group. With adipose-MSCs the stiffness was comparable to native cartilage and Aggrecan, SOX9 as well as Versican expression was higher.