ATC Abstracts

American Transplant Congress abstracts

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Articles tagged "T cell activation"

  • 2021 American Transplant Congress

    Polyfunctional T-cell Impairment to Sars-cov-2 Coronavirus in Solid Organ Transplant Recipients with Acute Covid-19 Infection

    A. Favà1, L. Donadeu2, V. Pernin3, M. Meneghini1, E. Crespo2, N. Sabé4, L. Lladó5, J. Gonzalez-Costello6, O. Thaunat7, O. Bestard1

    1Kidney Transplantation Unit, Bellvitge University Hospital- IDIBELL, L'Hospitalet de Llobregat. Barcelona, Spain, 2Experimental Nephrology Laboratory, IDIBELL, Bellvitge University Hospital, L'Hospitalet de Llobregat. Barcelona, Spain, 3Kidney Transplant Unit, Hospital de Montpellier, Montpellier, France, 4Infectious Disease Department, Bellvitge University Hospital, L'Hospitalet de Llobregat. Barcelona, Spain, 5Liver Transplant Unit, Bellvitge University Hospital, L'Hospitalet de Llobregat. Barcelona, Spain, 6Heart Transplantation Unit, Bellvitge University Hospital, L'Hospitalet de Llobregat. Barcelona, Spain, 7Department of Transplantation, Edouard Herriot Hospital Lyon, Lyon, France

    *Purpose: The emerged COVID-19 pandemic caused by SARS-CoV-2 has paralyzed the world, due to its high infectivity and fatal outcomes, especially among more vulnerable individuals.…
  • 2021 American Transplant Congress

    IL-10 Signaling in T Cells Modulates Costimulation-independent Activation and is Essential for Transplant Tolerance Induction

    M. Iglesias Lozano1, D. Bibicheff1, M. Chicco2, A. Komin1, G. Brandacher1, G. Raimondi1

    1Plastic Surgery, Johns Hopkins University, Baltimore, MD, 2Frimley Health NHS Foundation Trust, London, United Kingdom

    *Purpose: Costimulation blockade (CoB)-based immunotherapy remains a very promising approach for better management of transplant recipients. Understanding the mechanisms that impact the efficacy of CoB…
  • 2021 American Transplant Congress

    Role of Baseline PD-1 Checkpoint Inhibitor Pathway Expression in Bridge to Liver Transplant Hepatocellular Carcinoma

    K. Nunez, T. Sandow, M. Hibino, A. Cohen, P. Thevenot

    Ochsner Health, New Orleans, LA

    *Purpose: Response to first line liver-directed therapy (LDT) in hepatocellular carcinoma (HCC) has important implications in both bridge to transplant (BTT) success as well as…
  • 2021 American Transplant Congress

    Evaluation of the Differentiation Program of Endogenous Antigen-specific CD8+T Cells Following Transplantation

    S. M. Krummey1, K. Tong2, M. L. Ford2

    1Pathology, Johns Hopkins University, Baltimore, MD, 2Surgery, Emory Transplant Center, Atlanta, GA

    *Purpose: Despite advances in the survival of transplanted organs, acute T cell mediated rejection remains a significant clinical problem with few effective or targeted treatments.…
  • 2021 American Transplant Congress

    T-Cell Responses in Solid Organ Transplant Recipients with SARS-CoV-2 Infection

    V. H. Ferreira, T. M. Marinelli, T. Ku, M. Ierullo, B. Majchrzak-Kita, I. Bahinskaya, N. Pinzon, A. Humar, D. Kumar

    University Health Network, Toronto, ON, Canada

    *Purpose: Preliminary data suggest solid organ transplant (SOT) recipients may be at high-risk for developing severe COVID-19. This may be due in part to alterations…
  • 2021 American Transplant Congress

    P2X7 Receptor Activity Mediates Th17-Specific Self- and Alloreactivity in Non-Human Primates

    C. Little, J. Sullivan, W. Burlingham, D. Kaufman

    Department of Surgery, University of Wisconsin, Madison, WI

    *Purpose: The broadly expressed ATP-binding purinergic receptor, P2X7 (P2X7R) is involved in the Th17 mediated cellular immune response to allo- and select self-antigens (Collagen type…
  • 2021 American Transplant Congress

    Reassessing TCMR in Kidney Transplant Indication Biopsies: Emerging Evidence for Partial Exhaustion in Late TCMR

    P. Halloran1, J. Reeve1, &. the INTERCOMEX Study Group2

    1Alberta Transplant Applied Genomics Centre, Edmonton, AB, Canada, 2., ., AB, Canada

    *Purpose: We rederived the MMDx rejection archetypes in an expanded set of 1679 kidney transplant biopsies to add power and potentially define heterogeneity in TCMR.…
  • 2021 American Transplant Congress

    Establishing a Linear Program for the Development of Costimulation Resistant T-Cells

    D. P. Moris, A. Lucander, A. Kirk

    Surgery, Duke, Durham, NC

    *Purpose: CD4+CD57+PD1-T-cells are primed effectors capable of mediating belatacept-resistant rejection, however, the developmental program giving rise to these cells has not been elucidated in detail.…
  • 2021 American Transplant Congress

    A Mechanistic Evaluation to Guide the Optimal Immunosuppression Adjustment Strategy in Transplant Patients with COVID-19

    V. Hall, V. Ferreira, D. Kumar, A. Humar

    UHN, Toronto, ON, Canada

    *Purpose: The optimal management of immunosuppression in transplant patients infected with COVID-19 is unknown. Reduction in calcineurin inhibitors or antimetabolite doses is often performed in…
  • 2021 American Transplant Congress

    CRISPR Screens to Map CTLA-4 Regulatory Networks in Primary Human T Cells

    O. Shaked1, J. Freimer1, J. Pritchard2, A. Marson1

    1UCSF, San Francisco, CA, 2Stanford University, Stanford, CA

    *Purpose: For most cell types, the pathways that regulate the levels of critical disease-relevant genes are not known. Recent advances in gene editing have enabled…
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