Articles tagged "Islets"

2020 American Transplant Congress
Splenectomy Impedes B Cell Infiltration Associated with Rejection of Neonatal Porcine Islet Xenografts
Z. W. Fitch, M. Song, R. Schmitz, F. Leopardi, M. Ribeiro, A. Miller, G. Devi, B. Collins, X. Luo, A. D. Kirk
Duke University, Durham, NC
*Purpose: Xenotransplantation has historically been frustrated by antibody-mediated rejection. Splenectomy has shown efficacy in mediating humoral immunity. We hypothesized that adding splenectomy to a clinically…
2020 American Transplant Congress
The Pleural Cavity, A Novel and Clinically Relevant Site for Pancreatic Islet Transplantation
Q. Yuan¹, K. Lee¹, C. Rickert¹, S. Hong¹, E. Acheampong¹, E. Szuter¹, Y. Xu², K. Deng¹, N. Feeney¹, Q. Fu¹, G. Huai¹, J. Lei¹, I. Rosales¹, P. Russell¹, J. Madsen¹, R. Colvin¹, A. Alessandrini¹, J. Markmann¹, -. Q.Y. and K.L.³, -. A.A. and J.F.M.⁴
¹Massachusetts General Hospital, Boston, MA, ²Chinese PLA General Hospital & Medical School, Beijing, China, ³Co-First Authors, Boston, MA, ⁴Co-Senior Authors, Boston, MA
*Purpose: Islet transplantation currently provides a cure for type 1 diabetes. Hepatic infusion of islets via the portal vein is clinically accepted in human, although…
2020 American Transplant Congress
Coagulation and Cd46 Transgene Modification in Neonatal Porcine Islet Xenotransplantation
M. Song, Z. Fitch, K. Samy, Q. Gao, R. P. Davis, F. Leopard, R. Schmitz, N. Huffman, G. Devi, B. Collins, A. D. Kirk
Surgery, Duke University, Durham, NC
*Purpose: Vascular thrombosis is a potential cause for early intraportal xeno-islet loss. To better understand the relationship between coagulation and inflammation in early xeno-islet transplantation,…
2020 American Transplant Congress
Withaferin A Prolongs Islet Allograft Survival in a Mouse Transplant Model by Preventing T Lymphocyte Proliferation and Dendritic Cell Maturation
K. Kumano¹, M. A. Kanak², S. Vasu¹, Y. Liu¹, M. Lawrence¹, B. Naziruddin¹
¹Baylor University Medical Ctr, Dallas, TX, ²Virginial Commonwealth University Medical Center, Richmond, VA
*Purpose: Chronic decline in islet graft function and toxicities imposed by immunosuppressant drugs remain as challenges to the widespread use of islet transplantation for type…
2020 American Transplant Congress
Immunomodulation with FasL Presenting Biomaterials Achieves Long-Term Survival of Allogeneic Islets in the Absence of Chronic Immunosuppression in a Non-Human Primate Model
J. Lei¹, H. Deng¹, T. Chen¹, K. Lee¹, C. Peters¹, Z. Yang¹, K. Deng¹, G. Rickert¹, I. Rosales¹, N. Serifis¹, M. Coronel², M. Hunckler², E. Yolcu³, H. Shirwan³, A. García², J. Markmann¹
¹Surgery, Mass General, Boston, MA, ²School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, ³School of Mechanical Engineering, University of Louisville School of Medicine, Louisville, KY
*Purpose: The full potential of islet transplantation will only be realized by the development of tolerogenic strategies that obviate the need for maintenance immunosuppressants. We…
2020 American Transplant Congress
Lacripep^TM and its Analogs Act as Novel Interventional Agents to Promote Long-Term Islet Transplantation Outcomes
M. Ma¹, K. Teixeira², G. Laurie², K. Brayman¹, P. Chhabra¹
¹Department of Surgery, University of Virginia Health System, Charlottesville, VA, ²Department of Cell Biology, University of Virginia Health System, Charlottesville, VA
*Purpose: To study the prosecretory, prosurvival, and mitogenic effect of Lacripep™ and its analogs in enhancing islet viability, increasing insulin secretion and promoting long-term islet…
2020 American Transplant Congress
Long-term Functional Survival of Human Stem Cell-Derived Islets Microencapsulated in Alginate with CXCL12 in Non-Human Primates without Immunosuppression
M. C. Poznansky¹, D. Alagpulinsa¹, J. Lei², R. Pop³, D. Sobell⁴, M. Chapin¹, S. Collins³, A. Veres³, H. Deng², D. Melton³, J. Markmann²
¹Vaccine and Immunotherapy Center, Massachusetts General Hospital, Charlestown Navy Yard, MA, ²Transplant Surgery, Massachusetts General Hospital, Boston, MA, ³Harvard Stem Cell Institute, Harvard University, Cambridge, MA, ⁴Vaccine and Immunotherapy Center, Massachusetts General Hospital, Boston, MA
*Purpose: Human pluripotent stem cell-derived islet-like cells (SC-islets) represent a practical source for beta-cell replacement to achieve a functional cure for type 1 diabetes. Long-term…
2020 American Transplant Congress
XIAP Enhances Xenoislet Survival: Novel Models to Evaluate Pretransplantation Gene Modifications
G. R. Devi¹, Z. Fitch¹, M. Song¹, M. Ribeiro¹, A. McGowan¹, X. Luo², B. H. Collins¹, A. D. Kirk¹
¹Department of Surgery, Duke Univesity School of Medicine, Durham, NC, ²Division of Nephrology, Duke Univesity School of Medicine, Durham, NC
*Purpose: Porcine islet xenotransplantation offers a reliable and near limitless supply of islets for the treatment of type 1 diabetes. Intraportal infusion of cells exposes…
2020 American Transplant Congress
Immune Checkpoint PD-L1 Pathway as an Effective Platform for Localized Immunomodulation to Attain Indefinite Allogeneic Islet Graft Survival
L. Batra¹, P. Shrestha¹, H. Zhao¹, K. B. Woodward¹, M. Tan¹, O. G. Nuno¹, A. Togay¹, M. M. Coronel², A. J. Garcia², H. Shirwan¹, E. S. Yolcu¹
¹Institute for Cellular Therapeutics and Department of Microbiology and Immunology, University of Louisville, Louisville, KY, ²Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA
*Purpose: Allogenic islet transplantation is an effective therapeutic approach for the treatment of T1D. However, chronic immunosuppression to control rejection is a major limitation. The…
2020 American Transplant Congress
Circulating MicroRNA Signatures in Chronic Pancreatitis Patients Undergoing Total Pancreatectomy with Islet Transplantation
S. Vasu, C. M. Darden, K. Kumano, M. Lawrence, B. Naziruddin
Baylor University Medical Ctr, Dallas, TX
*Purpose: Chronic pancreatitis (CP) is characterized by exocrine insufficiency and severe abdominal pain. Total pancreatectomy with islet autotransplantation (TPIAT) relieves chronic pain and aids restoration…

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