ATC Abstracts

American Transplant Congress abstracts

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Articles tagged "Co-stimulation"

  • 2021 American Transplant Congress

    Life-supporting Multi-gene Cardiac Xenografts From Swine Demonstrate Survival >8 Months and Preclinical Efficacy for Human Clinical Trials

    C. Goerlich1, B. Griffith1, A. Singh1, T. Zhang1, I. Tatarov1, B. Lewis1, F. Sentz1, A. Hershfeld1, P. Odonkor1, B. Williams1, E. Strauss1, A. Tabatabai2, A. Bhutta3, D. Ayares4, D. Kaczorowski1, M. Mohiuddin1

    1Surgery, University of Maryland School of Medicine, Baltimore, MD, 2Department of Medicine, Division of Pulmonary and Critical Care Medicine, University of Maryland School of Medicine, Baltimore, MD, 3Pediatrics, Pediatric Critical Care Medicine, University of Maryland School of Medicine, Baltimore, MD, 4Revivicor, Inc., Blacksburg, VA

    *Purpose: Cardiac xenotransplantation has been proposed to bridge the gap in organ shortage for those in end-stage heart failure without the opportunity to receive a…
  • 2021 American Transplant Congress

    AT-1501, a Novel and Clinically Applicable CD40L Specific Monoclonal Antibody, Promotes Islet Allograft Survival in Nonhuman Primates

    D. Berman1, N. Kenyon1, M. Willman1, A. Gill2, S. Perrin3, C. Ricordi1

    1University of Miami, Miami, FL, 2ALS Therapy Development Institute, Cambridge, MA, 3Novus Therapeutics, Irvine, CA

    *Purpose: Immune intervention with a CD40L specific monoclonal antibody (mAb, Hu5c8, Biogen) has previously been shown to safely and effectively prevent islet allograft (IA) rejection…
  • 2021 American Transplant Congress

    Interruption of Notch Signaling via Blockade of Delta-Like Ligand 4 Prevents Co-Stimulation Blockade Resistant Allograft Rejection

    A. J. Matar, B. P. Lovasik, Y. Dong, D. A. Faber, J. Habib, C. Breeden, J. Regenold, A. Ghosh, A. Stephenson, W. H. Kitchens, A. B. Adams

    Emory University Department of Surgery, Atlanta, GA

    *Purpose: Co-stimulation blockade (CoB) has emerged as a promising immunosuppression strategy with the advent of Belatacept, a novel CTLA4-Ig fusion protein that blocks CD28-mediated T…
  • 2021 American Transplant Congress

    The Microenvironment of Belatacept-Resistant Rejection

    A. Johnson, J. Zhang, C. Larsen

    Surgery, Emory University, Atlanta, GA

    *Purpose: Belatacept is a co-stimulation blockade immunosuppressant, that despite demonstrating improved long-term outcomes, has not been widely adopted, in part, due to concern over early…
  • 2021 American Transplant Congress

    IFNγ, and to a Lesser Extent TNFα, Elicits Protracted Endothelial Cell Expression of Costimulatory Molecules and Antigen Presentation Machinery

    N. M. Valenzuela

    Pathology and Laboratory Medicine, UCLA, Los Angeles, CA

    *Purpose: Beyond simply “recruiting” leukocytes to sites of injury, local stimulation by the donor vascular compartment may prolong alloimmune responses. Moreover, the dynamics of endothelial…
  • 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

    Combined CD11b/CD40 Blockade is Superior to CD40 Blockade Alone in Prolonging Survival in Pig-to-Nonhuman Primate Renal Xenotransplantation

    D. A. Faber1, B. Lovasik1, A. Matar1, C. Breeden1, S. Kim1, A. Adams2

    1Surgery, Emory University School of Medicine, Atlanta, GA, 2Surgery, University of Minnesota, Minneapolis, MN

    *Purpose: Blockade of the CD40/CD154 pathway is highly effective in preventing rejection in pig-to-nonhuman primate (NHP) xenotransplantation models. Clinical translation of anti-CD154 mAbs, however, has…
  • 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

    Cognition After Belatacept Conversion (CAB) Trial

    W. Asch1, K. Belfield2, V. Do2, E. Cohen1

    1Yale University, New Haven, CT, 2Yale New Haven Hospital, New Haven, CT

    *Purpose: Extensive adverse effect profiles including neurotoxicity, manifesting as short-term memory loss, make CNIs less desirable despite their efficacy preventing acute rejection and increasing graft…
  • 2021 American Transplant Congress

    Anti-CD272 Antibody (6B2) Generated Foxp3+Regulatory T Cells and Suppressed Donor Specific Antibody in Murine Cardiac Transplant Model

    Y. Yamamoto1, M. Uchiyama2, K. Uchida3, H. Yagita3, M. Niimi1

    1Department of Surgery, Teikyo University, Tokyo, Japan, 2Department of Cardiovascular Surgery, Teikyo University, Tokyo, Japan, 3Juntendo University, Tokyo, Japan

    *Purpose: The co-inhibitory receptor B and T lymphocyte attenuator (BTLA; CD272) has been implicated in the regulation of autoimmune and may potentially play an important…
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