2022 American Transplant Congress
p40 Homodimers Stimulate Graft Dendritic Cells to Produce IL-15 Driving Endogenous Donor-Reactive Memory CD8 T Cell Activation within High-Risk Cardiac Allografts
*Purpose: Acute allograft injury occurring during the first 1-2 days post-transplant is mediated by graft infiltrating endogenous donor-reactive memory CD8 T cells and requires their…2022 American Transplant Congress
Desensitization Using Costimulatory Blockade and Bortezomib to Prevent DSA Formation and Rejection in Reconstructive Transplantation
Johns Hopkins University School of Medicine, Baltimore, MD
*Purpose: Sensitization in form of donor-specific antibodies (DSA) and subsequent antibody-mediated rejection constitute some of the greatest risk factors for allograft rejection and long-term graft…2022 American Transplant Congress
Outcomes After Conversion to Belatacept in Pediatric Kidney Transplantation
Pediatric Nephrology, Robert Debré Hospital, APHP, Paris, France
*Purpose: Belatacept (CTLA-Ig) is a selective co-stimulation blocker that is associated with reduced dnDSA, improved renal function, and prolonged allograft survival in adult transplant recipients…2022 American Transplant Congress
Perioperative IL-6 Blockade Promotes Intra-Graft Regulation and Prevents Costimulation-Blockade Resistant Rejection
*Purpose: Our group has recently shown that CTLA4-Ig monotherapy leads to limited murine heart allograft survival associated with decreased Treg frequencies and early acute T-cell…2022 American Transplant Congress
Predictors of Response to Belatacept Conversion in Kidney Transplant Patients with Chronic Active Antibody-Mediated Rejection
1Virginia Commonwealth University, Richmond, VA, 2University of Alberta, Edmonton AB, AB, Canada
*Purpose: Chronic active antibody mediated rejection (cABMR) is a major cause of kidney transplant (KT) loss. Current therapies have unclear efficacy and side effects. We…2022 American Transplant Congress
T and B Cell Response to 3 Dose Covid Vaccine Series for Kidney Transplant Patients on Belatacept
*Purpose: Data shows COVID vaccine response after 2 doses in patients on Belatacept immunosuppression (IS) is low, with reported rates of seroconversion (as measured by…2022 American Transplant Congress
Long-Term Rejection Free Renal Allograft Survival with Fc-Modified Anti-cd154 Antibody Monotherapy in Nonhuman Primates
MGH Center for Transplantation Sciences, Boston, MA
*Purpose: Belatacept is currently the only FDA approved costimulatory blockade (CB) used as an alternative to calcineurin inhibitors in kidney transplantation. However, it has been…2022 American Transplant Congress
TNX-1500, an Fc-Modified Anti-cd154 Antibody, Prolongs Nonhuman Primate Cardiac Allograft Survival
*Purpose: Blockade of the CD40/CD154 T cell costimulation pathway is a promising approach to replace current clinical immunosuppression. TNX-1500 (TNX) is a novel humanized anti-CD154…2022 American Transplant Congress
Cd137 on Host Dendritic Cells Fine-Tunes the Intesity of Donor T Cells in Systemic Alloinmmune Responses
*Purpose: CD137 is a potent costimulatory receptor for CD8+ T cells but it also regulates dendritic cells (DCs) to suppress immune responses. In this study,…2022 American Transplant Congress
TIGIT Agonism Ameliorates Costimulation Blockade-Resistant Rejection by Increasing Quantity and Quality of Graft-Infiltrating Foxp3+ Treg
Emory University Transplant Center, Emory University, Atlanta, GA
*Purpose: Belatacept-based immunosuppression confers fewer off-target toxicities compared to CNI but comes at a cost of increased incidence and severity of acute rejection, potentially due…
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