2022 American Transplant Congress
Chimeric Antigen Receptor Regulatory T Cells (CAR-Tregs) Provide Significantly Greater Modulation of Alloimmune Responses Than Alternative Alloantigen-Specific Treg Strategies
1King's College London, London, United Kingdom, 2Quell Therapeutics, London, United Kingdom
*Purpose: Conferring alloantigen-specificity to ex vivo expanded CD4+CD25+Foxp3+ Tregs increases their capacity to counteract effector alloimmune responses following adoptive transfer into transplant recipients. This has…2021 American Transplant Congress
Environmental Factors That Shape T-cell Alloimmunity: Role of the Microbiome
*Purpose: Unlike other types of immunity, T-cell alloimmune responses to mismatched MHC proteins do not need priming by a previous exposure. While genetic differences between…2021 American Transplant Congress
Suppression of T Cell Proliferation by Activated Nonhuman Primate B Cells
Massachusetts General Hospital, Boston, MA
*Purpose: We previously generated Toll-like receptor (TLR)-activated B cells in rodent settings. These B cells can suppress T cell proliferation via in vitro mixed lymphocytes…2021 American Transplant Congress
Naïve Rhesus Monkey CD4+CD8loT Cells Comprise High Percentage of Memory T Cells with Strong Effector Function
Department of Surgery, University of Pittsburgh, PITTSBURGH, PA
*Purpose: Human CD4+CD8loT cells have been reported in patients with organ allograft rejection. We evaluated the incidence, phenotype, and function of CD4+CD8loT cells in nonhuman…2021 American Transplant Congress
K562 Cells Expressing HLA-A2 Stimulate Alloreactive CD8+ T Cells
Emory Transplant Center, Emory University, Atlanta, GA
*Purpose: T cell-mediated rejection is a significant factor that leads to graft damage and loss in transplant recipients. Due to the complexity of the TCR:pMHC…2021 American Transplant Congress
The Assesment of Pre-transplant Donor-reactive IL-21 Producing T Cells as a Tool to Identify Patients at Risk for Acute Rejection
*Purpose: The measurement of panel-reactive antibodies (PRA) has proven valuable in the transplant setting but it does not account for the presence of donor-reactive memory…2021 American Transplant Congress
Hla-dq Epitope Mismatch Predicts De Novo Donor-Specific Antibody Formation and Acute Cellular Rejection After Living Donor Liver Transplantation
*Purpose: Epitope mismatch (MM) effect on living donor liver transplantation (LDLT) has not been studied in detail. This study aimed to investigate the role of…2020 American Transplant Congress
Non-Human Primate B Cells Into Regulatory B Cells by Activation with CpG
*Purpose: We previously generated Toll like receptor (TLR)-activated B cells in rodent settings. These B cells can suppress T cell proliferation via in vitro mixed…2020 American Transplant Congress
Evaluating Preformed Donor HLA Reactive T Cells Using PIRCHE-II Algorithm
*Purpose: De novo donor-specific HLA antibodies (dnDSA) production involves the indirect allorecognition pathway in which recipient CD4+T cells recognize donor-HLA-derived peptide and recipient HLA class…2020 American Transplant Congress
Autophagy-Lysosome Inhibitor Chloroquine Prevents CTLA-4 Degradation of T Cells and Attenuates Acute Rejection in Murine Skin and Heart Transplantation
*Purpose: The immune checkpoint cytotoxic T lymphocyte antigen-4 (CTLA-4), which was induced upon T cell activation but degraded quickly, has been targeted in the clinical…
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