ATC Abstracts

American Transplant Congress abstracts

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Articles tagged "T cell activation"

  • 2021 American Transplant Congress

    Detection of SARS-CoV-2 Specific Functional T Cells Using a Seven Color Flow Cytometry Assay

    L. Flebbe-Rehwaldt, J. Hayden, K. Mickey, S. Manley, S. Kleiboeker

    Eurofins-Viracor, Lees Summit, MO

    *Purpose: The need to evaluate SARS-CoV-2 immune responses is an important clinical research focus. Detecting neutralizing antibodies is one measure of immune response, but the…
  • 2021 American Transplant Congress

    Impaired Antibody Responses to Spike Protein Antigens of Sars-cov-2 in Solid Organ Transplant (sot) Recipients

    C. Ashokkumar1, S. Nadig2, V. Rohan2, A. Kroemer3, H. Dhani3, S. Rao4, R. Sindhi5

    1Plexision, pittsburgh, PA, 2Medical University of South Carolina, Charleston, SC, 3MedStar Georgetown Transplant Institute, Georgetown, DC, 4DHR Health Institute for Research and Development, Texas, TX, 5University of Pittsburgh, Pittsburgh, PA

    *Purpose: Chronic immunosuppression can impair antibody responses after natural infection and vaccination in SOT recipients. It is not known whether antibody responses are impaired in…
  • 2021 American Transplant Congress

    T-Cell Exhaustion in EBV DNAemic Solid Organ Transplant Recipients

    S. Kothari, T. Ku, D. Kumar, A. Humar, V. H. Ferreira

    Multi-Organ Transplant Program, University Health Network, Toronto, ON, Canada

    *Purpose: In transplant recipients, disease severity after infection with Epstein-Barr virus (EBV) may range from asymptomatic DNAemia to PTLD. Host factors likely play a key…
  • 2021 American Transplant Congress

    Gm2a: A Novel Regulatory Pathway Controlling Alloimmunity

    K. M. Baecher1, P. S. Heeger2, P. Cravedi2, M. Fribourg2, M. L. Ford1

    1Department of Surgery, Emory University, Atlanta, GA, 2Mount Sinai School of Medicine, New York, NY

    *Purpose: In recently published studies we discovered that the inhibitory receptor FcγRIIB regulates CD8+ T cell alloimmunity in a cell-autonomous fashion, and that increased expression…
  • 2021 American Transplant Congress

    Novel Mixed Lymphocyte Reaction Monitoring System That Predicts Chronic Antibody- Mediated Rejection in Kidney Transplant Recipients

    N. Iwahara1, K. Hotta1, T. Tanabe1, D. Iwami2, Y. Takada3, H. Higuchi1, H. Sasaki3, H. Harada3, N. Shinohara1

    1Hokkaido Univercity, Sapporo, Japan, 2Jichi Medical University, Shimotsuke, Japan, 3Sapporo City General Hospital, Sapporo, Japan

    *Purpose: Chronic active antibody-mediated rejection (CAAMR) induced by de novo donor-specific antibodies (DSA) is the main cause of graft loss in the long-term. Currently, there…
  • 2021 American Transplant Congress

    Belatacept-Resistant T Cells are Activated by IFNα-IRF7 Pathway

    F. Herr, K. Bargiel, A. Vernochet, A. Durrbach

    UMR1186, Villejuif, France

    *Purpose: Second signal of activation play an important role in activation of T lymphocytes. Their control by checkpoint inhibitor is efficient in auto-immune disease and…
  • 2021 American Transplant Congress

    Inhibition of Fatty Acid Beta-Oxidation Prolongs Heart Allograft Survival

    B. W. Wong, Y. Zhu, H. Dun, L. Ye

    Surgery, Washington University School of Medicine, Saint Louis, MO

    *Purpose: To test the therapeutic efficacy of pharmacological inhibition of fatty acid beta-oxidation (FAO) on acute heart allograft survival.*Methods: We used a heterotopic Balb/c donor…
  • 2021 American Transplant Congress

    The Development and Characterization of AT1501, an Anti CD40L Antibody Lacking Fc Effector Function

    S. Perrin1, A. Gill2, C. Gill2, F. Vieira2, K. Thompson2, J. Lincecum2, B. Jiang2

    1Novus Therapeutics, Irvine, CA, 2ALS Therapy Development Institute, Cambridge, MA

    *Purpose: CD40L is a costimulatory type II membrane receptor for CD40. The binding of CD40L on T helper cells to CD40 on antigen presenting cells…
  • 2021 American Transplant Congress

    Taurodeoxycholic Acid and L-valine Ameliorate Macrophage Driven Alloimmunity in Obese Transplant Recipients

    M. Quante1, J. Iske1, D. Perkins2, M. Alegre3, H. Zhou1, A. Elkhal1, S. G. Tullius1

    1Department of Surgery, Brigham and Women's Hospital, Boston, MA, 2University of Illinois at Chicago, Chicago, IL, 3Department of Medicine, The University of Chicago, Chicago, IL

    *Purpose: Obesity initiates a chronic inflammatory network linked to more frequent perioperative complications and increased acute rejection rates after organ transplantation. Clinically, morbidly obese transplant…
  • 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.…
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