Articles tagged "Tolerance"

2019 American Transplant Congress
Acquired Resistance to Transplantation Tolerance as a Result of Prior Pregnancy Requires B Cells
D. V. Tran, A. N. Suah, S. Khiew, J. S. Young, Q. Wang, D. Yin, M. Alegre, A. S. Chong
Departments of Surgery and Medicine, University of Chicago, Chicago, IL
*Purpose: Clinical data suggest allogeneic pregnancy is a sensitizing event; however, data from mouse models suggests it induces fetal-specific regulatory T cell (Treg) expansion and…
2019 American Transplant Congress
Preliminary Mechanistic Studies of Regulatory Dendritic Cell (DCreg) Cell Infusion in Living Donor Liver Transplant Recipients
A. Thomson, C. Macedo, A. Zahorchak, H. Dai, A. Humar, F. G. Lakkis, M. Styn, D. Metes
Starzl Transplantation Institute, Pittsburgh, PA
*Purpose: This is a first-in-human phase I/II safety and preliminary efficacy trial of donor-derived regulatory dendritic cells (DCreg) in living donor liver transplantation (LTx) in…
2019 American Transplant Congress
A Kidney Transplant Recipient with Severe Acute GvHD Promptly Rescued by Donor HLA-Targeted Serotherapy
J. Zuber¹, O. Boyer¹, B. Neven¹, R. Berthaud¹, M. Ould Rabah¹, I. Jollet², V. Renac², F. Pirenne², S. Gross², R. Djoudi², P. Tiberghien², J. Taupin³, S. Blanche¹, R. Salomon¹
¹Paris Descartes University, Paris, France, ²Etablissement Français du Sang, Paris, France, ³Department of Immunology and Histocompatibility, St Louis Hospital, Paris, France
*Purpose: Acute Graft-versus-Host Disease (GvHD) is a rare but frequently lethal complication after solid organ transplantation (SOT). In intestinal transplant recipients, anti-HLA Donor-Specific Antibody (DSA)…
2019 American Transplant Congress
Long-Term Kidney Graft Evolution in Simultaneous Liver-Kidney Transplants with Immunological Risk
G. J. Piñeiro¹, E. Montagud¹, J. Ugalde¹, R. Gelpi¹, V. Torregrosa¹, J. Rovira², J. Colmenero³, F. Diekmann¹, N. Esforzado¹
¹Nephrology and Kidney Transplantation, Hospital Clínic of Barcelona, Barcelona, Spain, ²Nephrology and Kidney Transplantation, Laboratori Experimental de Nefrologia i Trasplantament, IDIBAPS, Barcelona, Spain, ³Liver Transplant Unit, Hospital Clínic of Barcelona, Barcelona, Spain
*Purpose: There is disagreement about the real impact of anti-HLA sensitization on patient and kidney graft survival in simultaneous liver-kidney transplant (SLKT).*Methods: We reviewed the…
2019 American Transplant Congress
Responder B Cell Depletion Increased Allo-Reactive Regulatory T Cells Generated in Allo-Anergization
N. Tanimine¹, L. Contreras-Ruiz², K. Deng¹, N. Feeney¹, C. Rickert¹, K. Lee¹, E. Guinan³, J. Markmann¹
¹Department of Surgery, Center for Transplantation Sciences, Massachusetts General Hospital, Boston, MA, ²Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, ³Department of Radiation Oncology, Dana Farber Cancer Institute, Boston, MA
*Purpose: Regulatory T cells (Tregs) are promising tool for induction and maintenance of transplantation tolerance. We have done a feasibility trial in kidney transplant recipients…
2019 American Transplant Congress
Chimeric Allografts Induced by Stem Cell Mobilizing Agents in a Mouse Model of Kidney Transplantation: Role of CD133 Stem Cells
J. Zhou, l. Qi, A. Ahmadi, R. Wesson, A. Cameron, J. Burdick, Z. Sun
Johns Hopkins University School of Medicine, Baltimore, MD
*Purpose: It has been reported that a stem cell mobilizing therapy using a combination of AMD3100 and low dose FK506 (AF) enabled immunosuppressive-free long-term kidney…
2019 American Transplant Congress
An Open-Label Proof-of-Principle Phase 2A Study to Evaluate Autologous Hematopoietic Stem Cell Transplantation for Allogeneic Organ Transplant Tolerance (ASCOTT)
A. Chruscinski¹, H. Atkins², A. Clement², D. Grant¹, C. Bredsen², E. Renner¹, J. Zhang¹, M. Epstein¹, L. Lilly¹, N. Selzner¹, O. Adeyi¹, R. Smith¹, S. Moshkelgosha¹, A. Humar¹, S. Juvet¹, G. Levy¹
¹Multi-Organ Transplantation, University Health Network, Toronto, ON, Canada, ²Ottawa Hospital Research Institute, Ottawa, ON, Canada
*Purpose: Long-term survival of recipients of solid organ transplants is hampered by chronic rejection, disease recurrence and immunosuppression-induced toxicity. Self-tolerance is re-established after autologous hematopoietic…
2019 American Transplant Congress
Regulating T Cell Responses by Forced Transgenic Expression of Decay-Accelerating Factor
D. Heja¹, Z. He¹, S. A. Lira¹, F. Lin², D. Homann¹, P. S. Heeger¹
¹Icahn School of Medicine at Mount Sinai, New York, NY, ²Cleveland Clinic, Cleveland, OH
*Purpose: Decay-accelerating factor (DAF, CD55) is a cell surface expressed, glycophosphatidylinositol-(GPI)-anchored, complement regulator. Previous studies showed that during cognate T cell/antigen presenting cell (APC) interactions…
2019 American Transplant Congress
Increased Ratio of Circulating Tfh for Tfr Cells in Chronic Renal Allograft Dysfunction: A Pilot Study
L. Yan, Y. Li, Y. Li, X. Wu, X. Wang, L. Wang, Y. Shi, J. Tang
West China Hospital OF Sichuan University, Chengdu, China
*Purpose: T follicular helper (Tfh) cells play a central role in contribution of B cell differentiation and antibody production. T follicular regulatory (Tfr) cells inhibit…
2019 American Transplant Congress
Analysis and Regulation of Immune Reaction in the Transplantation from MHC Homozygous Donors to Heterozygous Recipients with Minor Antigen Mismatches
T. Murata, H. Wada, R. Otsuka, H. Tsuji, A. Sasaki, M. Baghdadi, K. Seino
Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan
*Purpose: Induced pluripotent stem cells (iPSCs) is expected to be the source of therapeutic cells in the regenerative medicine. Autologous derivation of iPSCs is the…