ATC Abstracts

American Transplant Congress abstracts

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Articles tagged "Co-stimulation"

  • 2019 American Transplant Congress

    p40 Homodimer Indirectly Induce Proliferation of Endogenous Donor-Reactive Memory CD8 T Cells within High-Risk Allografts via IL-15 Signaling

    H. Tsuda, A. Valujskikh, R. Fairchild

    Inflammation and Immunity, Cleveland Clinic, Cleveland, OH

    *Purpose: Increasing the duration of cold ischemic storage (CIS) from 0.5 to 8 hrs prior to transplant induces the increased proliferation of endogenous donor-reactive CD4…
  • 2019 American Transplant Congress

    Effects of Thalidomide and Dexamethasone Co-Treatment on CD8+ T Cells

    J. Kim1, E. Kim2, Y. Cho1, H. Lee1, M. Kim3, Y. Kim3, K. Huh3, B. Kim4

    1The Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Korea, Republic of, 2Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea, Republic of, 3Department of Transplantation Surgery, Yonsei University College of Medicine, Seoul, Korea, Republic of, 4Nephrology Division, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea, Republic of

    *Purpose: Thalidomide (TM) is known to have anti-cancer and anti-inflammatory effects and dexamethasone (DX) has been reported that it also reduces inflammation and inhibits inflammatory…
  • 2019 American Transplant Congress

    Selective CD28 Blockade-Mediated Inhibition of T Follicular Helper Cell and DSA Responses is CTLA-4 Dependent

    G. M. La Muraglia II, M. L. Ford, I. R. Badell

    Emory Transplant Center, Atlanta, GA

    *Purpose: Clinical costimulation blockade of the CD28 pathway in the form of CTLA-4Ig has shown the ability to attenuate T cell dependent DSA responses. However,…
  • 2019 American Transplant Congress

    Peripheral Blood Regulatory T Cells In The Folow In The Kidney-transplant Patients

    M. A. Carmona-Escamilla1, G. Queipo2, L. A. Garcia-Mosqueda3, R. Lascurain4

    1Nephrology, Pemex, CDMX, Mexico, 2Genetics, Hospital General, CDMX, Mexico, 3UNAM, CDMX, Mexico, 4Inmunologia, UNAM, CDMX, Mexico

    *Purpose: Investigate the peripheral blood levels of CD4+CD25+FOXP3p3+ regulatory T cells (Tregs) in patients with kidney transplant at least one year after kidney transplantation and…
  • 2019 American Transplant Congress

    Costimulation Blockade Modulates Humoral Responses in Highly Sensitized Transplant Recipients

    J. Kwun, B. Ezekian, P. Schroder, M. Manook, J. Yoon, M. Mulvihill, K. Freischlag, J. Yi, S. Knechtle

    Surgery, Duke Transplant Center, Durham, NC

    *Purpose: Broad human leukocyte antigen sensitization is a significant barrier to successful solid organ transplantation. Sensitized patients have poor access to donor organs, high wait…
  • 2019 American Transplant Congress

    FcγRIIB is a Novel CD8+ Effector T Cell Intrinsic Regulatory Pathway That Correlates with Freedom from Rejection in Renal Transplant Patients

    A. B. Morris1, D. F. Pinelli1, D. Liu1, J. M. Boss2, C. D. Scharer2, M. Fribourg3, P. Cravedi3, P. S. Heeger3, M. L. Ford1

    1Surgery, Emory University, Atlanta, GA, 2Micro & Immuno, Emory University, Atlanta, GA, 3Center for Translational Transplant Research, Icahn SOM at Mount Sinai, New York, NY

    *Purpose: To understand the functional role and clinical relevance of FcγRIIB on CD8+ T cells in transplantation.*Methods: See results*Results: FcγRIIB is the sole inhibitory Fcγ…
  • 2019 American Transplant Congress

    IFNAR Signaling Augments Plasmacytoid Dendritic Cell Activation during Costimulation Independent Rejection

    J. Habib, D. Mathews, Y. Dong, A. Stephenson, A. Ghosh, C. Breeden, A. Adams

    Surgery, Emory University, Atlanta, GA

    *Purpose: Costimulation blockade (CoB) is a promising new transplant immunosuppression strategy offering improved long-term patient and allograft survival without the nephrotoxicity of calcineurin inhibitors. However,…
  • 2018 American Transplant Congress

    OX40 Costimulation Prevents Induction of Foxp3+ Tregs through Upregulation of Novel Repressors of Foxp3 Gene Expression

    X. Zhang,1 X. Xiao,1 P. Lan,1 J. Li,1 Y. Dou,1 W. Chen,1 N. Ishii,2 S. Chen,1 E. Taparowsky,3 X. Li.1,4

    1Immunobiology & Transplant Research Center, Houston Methodist Hospital, Houston, TX; 2Department of Microbiology and Immunology, Tohoku University, Sendai, Japan; 3Department of Biological Sciences, Perdue University, Lafayette, IN; 4Department of Surgery, Weill Cornell Medical College of Cornell University, New York, NY.

    Foxp3+ Tregs are essential for the induction of transplant tolerance and OX40 costimulation is known to break transplant tolerance. The exact mechanism of OX40 in…
  • 2018 American Transplant Congress

    Patients Converted to Belatacept Show Different Immunophenotyping Compared with De Novo Belatacept-Treated Patients

    M. Rial,1 F. Caro,2 A. Nella,2 D. Guerrieri,2 L. León,1 P. Uva,1 E. Chuluyan,2 D. Casadei.1

    1Instituto de Nefrología, Nephrology, Buenos Aires, Argentina; 2CEFYBO, UBA, CONICET, Buenos Aires, Argentina.

    The incidence of adverse clinical events mainly in early, but not late post-transplantation such as an increased rate of acute rejection precludes the use of…
  • 2018 American Transplant Congress

    Loss of HIF-1α in CD4 T Cell Improve Outcome of Mouse Vascularized Osteomyocutaneous Allotransplantation under Costimulation Blockade

    C-.H. Lin,1,2 M. Anggelia,1,2 H. Yang,3 W. Chuang,4 H. Cheng,1 F-.C. Wei,1,2 G. Brandacher.5

    1PRS, Center for VCA, Chang Gung Memorial Hospital, Taoyuan, Taiwan; 2Chang Gung Medical College and Chang Gung University, Taoyuan, Taiwan; 3Nephrology, Chang Gung Memorial Hospital, Taoyuan, Taiwan; 4Pathology, Chang Gung Memorial Hospital, Taoyuan, Taiwan; 5PRS, Johns Hopkins University School of Medicine, Baltimore, MD.

    Background: Allograft survival depends on the balance of effector T cells (Teff) and regulatory T cells (Tregs). Previous study suggested that the balance is controlled…
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