ATC Abstracts

American Transplant Congress abstracts

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Articles tagged "CD4"

  • 2022 American Transplant Congress

    Identification of Highly-Effective Donor-Reactive CD4+CD8αlo T Cells in CTLA4Ig-Treated Renal Allograft Recipient Monkeys

    M. Kubo, K. Sasaki, L. Lu, V. Vujevich, A. Thomson, M. Ezzelarab

    Department of Surgery, Thomas E. Starzl Transplantation Institute, University of Pittsburgh, Pittsburgh, PA

    *Purpose: Potent CD4+CD8αlo effector T cells have been reported in transplant (tx) patients. . We evaluated the incidence and function of CD4+CD8αloT cells in renal…
  • 2021 American Transplant Congress

    Cd4 T Cells Can Trigger Nk-dependent Chronic Rejection Independent of Antibodies

    R. G. Gill1, B. Mehrad2, C. M. Lin2

    1Surgery, University of Colorado Denver, Aurora, CO, 2Medicine, University of Florida, Gainesville, FL

    *Purpose: In transplantation, recipient CD4+ T cells have two potential means of MHC class II-restricted donor antigen detection: (1) the direct recognition of allogeneic MHC…
  • 2021 American Transplant Congress

    Laminins Differentially Regulate Adaptive Alloimmune Responses

    L. Li1, M. Shirkey1, W. Piao1, Y. Xiong1, V. Saxena1, T. Zhang1, J. Iyyathurai2, R. Lakhan1, R. Abdi3, J. Bromberg1

    1Surgery, UMB, Baltimore, MD, 2CVID, UMB, Baltimore, MD, 3Harvard University, Boston, MA

    *Purpose: Lymph node (LN) stromal cell expressed laminin α4 (Lama4) and laminin α5 (Lama5) fibers are associated with tolerance and immunity, respectively. They regulate cell…
  • 2021 American Transplant Congress

    TIGIT Identifies Polyfunctional Donor-Specific CD4+ T Cells Lost After Kidney Transplantation

    A. C. van der List, N. H. Litjens, M. G. Betjes, M. Klepper

    Nephrology and Transplantation, Erasmus MC, Rotterdam, Netherlands

    *Purpose: Development of T-cell hyporesponsiveness to donor antigen may explain the substantial decrease in the risk for acute rejection in the years following kidney transplantation.…
  • 2021 American Transplant Congress

    Targeting Il-21 Receptor Shifts Tfh/tfr Balance and Ameliorateschronic Antibody Mediated Rejection

    Y. Nian, Z. Xiong, J. Zhao, Y. Fu

    Tianjin First Central Hospital, Tianjin, China

    *Purpose: Donor specific antibody (DSA) plays a central role in chronic kidney allograft injury. As a trigger of humoral alloimmune response, follicular T helper cells(Tfh)…
  • 2021 American Transplant Congress

    CD80/PD-L1 Uniquely Regulates CD4 Effector T Cell Migration

    W. Piao1, L. Li1, Y. Zhang2, K. Hippen2, M. WillsonShirkey1, B. Blazar2, L. Riella3, J. Bromberg1

    1U Maryland, baltimore, MD, 2U Minnesota, Minneapolis, MN, 3Harvard U, boston, MA

    *Purpose: CD80 is a costimulatory molecule expressed on antigen presenting cells (APCs) that binds CD28 and CTLA4, stimulating or inhibiting immunity, respectively. CD80 also binds…
  • 2021 American Transplant Congress

    Peripheral Lymphocyte Profiling and Increased Risk of EBV Infection in Pediatric Liver Transplant Recipients

    V. M. Novara Gennuso1, T. Miloh2

    1Pediatrics, Miller School of Medicine- University of Miami, Miami, FL, 2Pediatrics, Miami Transplant Institute, Miami, FL

    *Purpose: Epstein-Barr virus “EBV” infection and post-transplant lymphoproliferative disorders “PTLD” are significant comorbidities in the post-transplant “PT” setting, especially in pediatrics. The synergy among T…
  • 2020 American Transplant Congress

    Targeting CD4+ T Cell Metabolism Prolongs Graft Survival Age-Specifically

    Y. Nian, J. Iske, K. Minami, R. Maenosono, T. Heinbokel, A. Elkhal, S. G. Tullius

    Division of Transplant Surgery and Transplant Surgery Research Laboratory, Harvard Medical School, Boston, MA

    *Purpose: If and how aging affects T-cell metabolism and alloimmune response is unclear. Here, we show that T-cell metabolism changes drastically in aging. Most notably,…
  • 2020 American Transplant Congress

    Neuropilin 2 is a Novel Coinhibitory Molecule That Suppresses Alloimmune Responses Following Transplantation

    J. Wedel, J. Lee, N. Kochupurakkal, E. Chernov, M. Poreddy, K. Liu, S. Kong, D. Bielenberg, H. Nakayama, D. M. Briscoe

    Boston Children's Hospital, Boston, MA

    *Purpose: We have previously reported that signaling via the transmembrane receptor neuropilin 2 (NRP2) regulates PI3K/mTOR/Akt activity in several human cell lines. Furthermore, it is…
  • 2020 American Transplant Congress

    Laminin Alpha5 Regulates T Cell Entry and Distribution in Lymph Nodes in Immunity

    L. Li1, M. Shirkey1, W. Piao1, Y. Xiong1, V. Saxena1, T. Zhang1, C. Paluskievicz1, J. Zhao2, R. Abdi2, J. S. Bromberg1

    1UMB, Baltimore, MD, 2Harvard University, Boston, MA

    *Purpose: Laminin α5 (Lama5) and α4 (Lama4) are lymph node (LN) stromal fibers whose expression ratio influences CD4+ T cell migration and stimulation. We hypothesized…
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