ATC Abstracts

American Transplant Congress abstracts

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Articles tagged "CD4"

  • 2022 American Transplant Congress

    Alloprimed Antibody-Suppressor CD8+ T Cells Preferentially Kill Alloprimed Germinal Center B Cells

    J. Zimmerer, S. Chaudhari, G. Bumgardner

    OSUWMC, Columbus, OH

    *Purpose: Antibody-mediated rejection (AMR) is a significant contributor to transplant rejection. Our prior work identified a novel subset of CXCR5+CD8+ T cells (CD8+ TAb-supp cells)…
  • 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

    Hemodialysis (HD) Treatment Associates with Increased Risk of Delayed Graft Function (DGF) after Renal Transplantation (RT) and Augmented Cd4 and Cd8 T Cell Proliferation Compared to Peritoneal Dialysis (PD)

    A. Angeletti1, C. Donadei1, G. Donati1, G. Di Certo1, D. Conte1, L. Gasperoni1, E. Pelizzaro1, C. Guglielmo1, G. Comai1, P. Cravedi2, G. La Manna1

    1DIMES, S.Orsola-Malpighi Hospital, Bologna University, Bologna, Italy, 2DIMES, Icahn School of Medicine at Mount Sinai, New York, NY, US, New York, NY

    *Purpose: Delayed graft function (DGF) is a common event after RT that increases the risk of acute rejection and early graft loss. The impact of…
  • 2020 American Transplant Congress

    Suppressing Laminin Alpha5 Creates Tolerogenic Niches for Allograft Survival

    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) regulates CD4 T cell migration and function. We hypothesized that stromal Lama5 regulates the structure of the lymph node (LN) microenvironment…
  • 2020 American Transplant Congress

    Evaluation of Pre-Transplant T Cell Exhaustion as a Mechanism for Immune Dysfunction and Recipient Risk of Death Following Liver Transplant

    K. E. Lunsford1, N. Aware2, K. Cleveland3, D. T. Nguyen4, E. A. Graviss4, L. J. Minze3, T. N. Eagar4, X. C. Li3, R. M. Ghobrial3

    1Department of Surgery, Rutgers New Jersey Medical School, Newark, NJ, 2Department of Surgery, Houston Methodist Hosptial, Houston, TX, 3Department of Surgery, Houston Methodist Hospital, Houston, TX, 4Department of Pathology and Genomic Medicine, Houston Methodist Hospital, Houston, TX

    *Purpose: Cirrhosis-related immune dysfunction likely contributes to early mortality following liver transplant (LT) resulting from infections. We previously identified a pre-transplant biomarker panel for immune…
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