2017 American Transplant Congress
Mesenchymal Stem Cells Suppress T Cell Proliferation and Improve Allograft Survival in a Nonhuman Primate Transplant Model.
Emory Transplant Center, Emory University, Atlanta, GA
Background: The clinical implementation of costimulation blockade (CoB) provides long-term benefit to transplant recipients, with the short-term drawback of increased acute rejection. Cellular therapies are…2017 American Transplant Congress
Dual Costimulatory Blockades Failed to Achieve Transplant Tolerance Despite Induction of Mixed Chimerism in NHPs.
Background: Our previous studies showed that substantial deletion of CD8+ memory T cells (TMEM) was necessary to induce mixed chimerism (MC) and allograft tolerance when…2017 American Transplant Congress
Autologous Expanded Tregs and Porcine Hematopoietic Cells to Prolong Xenogeneic Pig Skin Graft Acceptance in Baboons.
Background: Mixed chimerism (MC) has been shown to induce tolerance to allogeneic organs and has shown promise for application to xenotransplants, although long-term tolerance has…2017 American Transplant Congress
Prolonged Survival with Co-Stimulatory Blockade Based Immunosuppression in Pig-to-Primate Liver Xenotransplantation.
Massachusetts General Hospital, Boston, MA
Background: Since the first attempt in 1968, survival following pig-to-baboon liver xenotransplantation (LXT) has been limited to <9-days due to a lethal coagulopathy. To improve…2017 American Transplant Congress
CD4 Depletion Is Necessary and Sufficient for Long-Term Nonhuman Primate Xenotransplant Survival.
Introduction. Xenotransplantation may alleviate the organ shortage, yet experimental renal xenotransplant has met limited success. We have previously reported the longest surviving pig-to-nonhuman primate (NHP)…2017 American Transplant Congress
CD28 Directed Immunotherapy Is More Potent Than Belatacept in a Nonhuman Primate Xenotransplant Model.
Introduction. Xenotransplantation may alleviate the organ shortage, yet experimental renal xenotransplantation has met limited success. T cell-mediated damage remains a critical problem. Our group has…2017 American Transplant Congress
Timing of Mesenchymal Stem Cell Infusions Affects Rejection Free and Overall Islet Allograft Survival.
We recently demonstrated that autologous, bone marrow-derived mesenchymal stem cells (MSC) promote allogeneic islet engraftment and survival in a streptozotocin induced, cynomolgus monkey model of…2017 American Transplant Congress
mRNA Biomarkers in Renal Allograft Protocol Biopsies Detected by the Nanostring Platform Predict Tolerance in Non-Human Primates.
Background. Renal allograft tolerance has been achieved in some but not all MHC mismatched kidneys in non-human primates (NHPs) and humans after induction of transient…2017 American Transplant Congress
D-Dimer Level, in Association with Humoral Responses, Negatively Correlates with Survival of Porcine Islet Grafts in Nonhuman Primates with Immunosuppression.
Background: Several immunosuppression (IS) regimens achieve long-term graft survival in nonhuman primates (NHPs) after porcine islet transplantation (PITx), but their success rates vary. To understand…2017 American Transplant Congress
Lymphoid Isolation as an Adjuvant Maneuver for Belatacept-Based Immunotherapy.
Purpose: Belatacept targets de novo alloimmune responses with minimal off target effects in renal transplantation, though adjuvant therapy is required for control of costimulation-blockade resistant…
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