ATC Abstracts

American Transplant Congress abstracts

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Articles tagged "Co-stimulation"

  • 2017 American Transplant Congress

    How to Promote Regeneration After Ischemic Reperfusion Injury: Dual Role of CD 137 Agonistic Antibody.

    J. Lee,1,3 H. Kim,3 H. Chung,1 K. Park,1 B. Kwon,3,4 H. Cho.2,3

    1Internal Medicine, Ulsan University Hospital and College of Medicine, University of Ulsan, Ulsan, Korea; 2Surgery, Ulsan University Hospital and College of Medicine, University, Ulsan, Korea; 3Biomedical Research Center, Ulsan University Hospital, Ulsan, Korea; 4School of Biological Science, University of Ulsan, Ulsan, Korea

    Acute sterile inflammation can be induced by tissue damage caused by ischemia-reperfusion. In transplantation ischemia reperfusion injury (IRI) is unavoidable procedure. IRI causes delayed graft…
  • 2017 American Transplant Congress

    CTLA4-Ig Inhibits Effector CD8+ T Cell Function In Vivo and Rescues Ongoing Acute Allograft Rejection.

    J. Young,1 S. Khiew,1 J. Yang,1 M.-L. Alegre,2 A. Chong.1

    1Surgery, University of Chicago, Chicago, IL; 2Medicine, University of Chicago, Chicago, IL

    CLTA4-Ig is clinically approved for preventing rejection in kidney transplant recipients but current data suggest that it is less effective for memory T cells, and…
  • 2017 American Transplant Congress

    Lymphoid Isolation as an Adjuvant Maneuver for Belatacept-Based Immunotherapy.

    M. Mulvihill,1 K. Samy,2 R. Davis,1 F. Leopardi,1 B. Collins,1 A. Kirk.1

    1Surgery, Duke University Medical Center, Durham, NC; 2Surgery, Indianapolis University Medical Center, Indianapolis, IN

    Purpose: Belatacept targets de novo alloimmune responses with minimal off target effects in renal transplantation, though adjuvant therapy is required for control of costimulation-blockade resistant…
  • 2017 American Transplant Congress

    Increased Ischemic Inflammation Induces Recipient Endogenous Memory CD4 Cell-Graft Dendritic Cell Interactions to Provide Help for Activation of Endogenous Memory CD8 T Cells.

    H. Tsuda, T. Tanaka, C. Su, A. Valujskikh, R. Fairchild.

    Immunology, Cleveland Clinic, Cleveland, OH

    Memory T cells provide protection against recurrent pathogens, but memory T cells with donor-reactivity pose a major barrier to successful allograft transplant and tolerance induction.…
  • 2017 American Transplant Congress

    Evaluation of Function and TCR signaling Profile of CD57+ T Cells in Allo-Specific Immunity.

    H. Xu,1 T. Brennan,1 Q. Li,2 A. Kirk.1

    1Department of Surgery, Duke University School of Medicine, Durham, NC; 2Department of Immunology, Duke University School of Medicine, Durham, NC

    Our studies have showed that CD57+ cells are resistant to B7 costimulation blockade (CoB). We hypothesize that CD57+ cells are highly sensitive to T cell…
  • 2017 American Transplant Congress

    Rapid Depletion of Circulating DSA and Treatment of Acute Antibody-Mediated Rejection with the Combination of CTLA-4Ig/Belatacept and Bortezomib in Mouse and Man.

    J. Young,1 A. Vannier,1 G. Bumgardner,2 A. Chong,1 R. Pelletier.2

    1Sugery, University of Chicago, Chicago, IL; 2Surgery, The Ohio State University, Columbus, OH

    Antibody mediated rejection (AMR) is a major cause of rejection, and there are limited therapeutic options for reversing alloantibody production when it is fully established.…
  • 2017 American Transplant Congress

    Kidney Recipients with 10 Year Belatacept-Treatment Display an Altered T Cell Subset Composition and Low Plasma Cytokine Levels Compared to Matched Patients with CNI-Based Immunosuppression.

    C. Falk,1 C. Neudörfl,1 A. Scherf,1 K. Daemen,1 J. Keil,1 J. Klempnauer,2 F. Lehner,2 G. Grannas.2

    1Institute of Transplant Immunology, IFB-Tx, MHH, Hannover, Germany; 2Department of Abdominal, Visceral and Transplantation Surgery, MHH, Hannover, Germany

    Introduction/BackgroundMore than 10 years ago, Belatacept (Bela)-based immunosuppression was investigated in the BENEFIT trial of kidney transplantation (KTx) compared to CNI-based immunosuppression. Bela inhibits T…
  • 2017 American Transplant Congress

    TIM-4 Identifies Pro-Inflammatory B Effector Cells That Are Potent Drivers of Alloimmunity and Allograft Rejection Through Expression of Both IFN-γ and IL-17.

    Q. Ding, K. Mohib, D. Rothstein.

    Thomas E. Starzl Transplantation Institute, University of Pittsburgh, Pittsburgh

    B cells can either augment or inhibit immune responses due to the presence both regulatory (Bregs) and effector (Beff) B cells expressing anti- or pro-…
  • 2017 American Transplant Congress

    The Treg/Th17 Axis: A Dynamic Balance Regulated by Stromal Laminins.

    T. Simon, J. Bromberg.

    University of Maryland, Baltimore

    Background: Our recent work demonstrated that laminins α4β1γ1 and α5β1γ1, components of the lymph node (LN) stroma, are differentially regulated. Tolerance is associated with relatively…
  • 2017 American Transplant Congress

    A Regulatory T Cell (Treg)-Intrinsic Role for p27kip1 in Acquired Transplant Tolerance.

    P. Morawski, L. Wang, X. Yang, Y. Chen, W. Hancock, A. Wells.

    Pathology, The Children's Hospital of Philadelphia, Philadelphia, PA

    We previously found that the cyclin-dependent kinase CDK2 phosphorylates the Treg transcription factor Foxp3, targeting it for proteolytic degradation. Treg with defective CDK2 activity express…
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