ATC Abstracts

American Transplant Congress abstracts

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Articles tagged "T cell activation"

  • 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…
  • 2021 American Transplant Congress

    Effect of HLA Class II Polymorphism on Predicted Cellular Immunity Against SARS-CoV-2 at the Individual Level and Within Twenty Five Race/ethnic Groups

    H. C. Copley1, L. Gragert2, A. R. Leach3, V. Kosmoliaptsis1

    1Department of Surgery, University of Cambridge, Cambridge, United Kingdom, 2Department of Pathology, Tulane University School of Medicine, New Orleans, LA, 3European Bioinformatics Institute (EMBL-EBI), Hinxton, United Kingdom

    *Purpose: Development of adaptive immunity after COVID-19 and after vaccination against SARS-CoV-2 is predicated on recognition of viral peptides, presented on HLA class II molecules,…
  • 2021 American Transplant Congress

    Dna-pkcs Regulation of the Allogeneic Immune Response

    L. Burdine, M. Burdine, Z. Waldrip, D. Harrison

    University of Arkansas, Little Rock, AR

    *Purpose: Organ transplantation is life-saving and continued investigations into immunological mechanisms that drive organ rejection are needed to improve immunosuppression therapies and prevent graft failure.…
  • 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…
  • 2020 American Transplant Congress

    Mitochondrion-Endothelial Interaction Generates Danger Signal in Promoting Costimulation-Resistant T Cell-Mediated Allograft Rejection

    S. Li1, M. Song1, Q. Li2, A. Kirk1, H. Xu1

    1Surgery, Duke University, Durham, NC, 2Immunology, Duke University, Durham, NC

    *Purpose: Endothelial cells (ECs) play a critical role in allorecognition, presentation, and costimulation for initiation of alloimmune rejection. The objective of this study was to…
  • 2020 American Transplant Congress

    Ischemic and Perfused Kidney Treated with Non-Cultured Adipose-Derived Regenerative Cells Increase the Immune and Regulatory Transcriptome

    R. Lathan1, R. Ghita1, R. Touyz1, M. Clancy2, P. Mark1

    1Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, United Kingdom, 2Renal Transplant Unit, Queen Elizabeth University Hospital, Glasgow, United Kingdom

    *Purpose: Studies in our rat model of ischemic reperfusion injury (IRI) demonstrate improved kidney function post injection of non-cultured autologous adipose-derived regenerative cells (ADRC). The…
  • 2020 American Transplant Congress

    Costimulatory Signal Impacts Car Treg Fate and Function in Transplantation

    B. Lamarthée1, A. Marchal1, S. Charbonnier1, T. Blein1, K. Vogt2, M. Titeux1, N. Pallet3, M. Delville1, E. Six1, D. Anglicheau4, C. Legendre4, B. Sawitzki2, J. Taupin5, M. Cavazzana1, I. André1, J. Zuber1

    1Inserm U1163, Institut Imagine, Paris, France, 2Department of Immunology, Charité University Hospital, Berlin, Germany, 3Inserm U1147, Centre Universitaire des Saints Pères, Paris, France, 4Service de Transplantation Rénale Adulte, Assistance Publique–Hôpitaux de Paris, Hôpital Necker, Paris, France, 5Inserm U1160, Centre Hayem, Paris, France

    *Purpose: Donor-specific regulatory T-cell (Treg) therapy has emerged as a potent strategy to promote immune tolerance in experimental transplantation. However, a major stumbling block in…
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