ATC Abstracts

American Transplant Congress abstracts

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Articles tagged "T cell activation"

  • 2017 American Transplant Congress

    Immunosuppressive Role of Pancreas Derived Mesenchymal Stem Cells.

    M. Kanak,1 F. Kunnathodi,2 M. Levy,1,3 M. Lawrence,2 B. Naziruddin.4

    1Transplant Surgery, Virginia Commonwealth University, Richmond, VA; 2Baylor Research Institute, Dallas, TX; 3Hume-Lee Transplant Center, VCU Health System, Richmond, VA; 4Simmons Transplant Institute, Baylor Scott and White Health, Dallas, TX

    BackgroundThe Edmonton protocol revived islet transplantation therapy for Type-1 Diabetic patients. However, Long-term islet function still remains a challenge. Immunosuppression used after islet transplantation contributes…
  • 2017 American Transplant Congress

    T Cell Responses to Viral Peptide Stimulation Predict Influenza Vaccine-Induced Seroconversion in Pediatric Solid Organ Transplant Recipients.

    E. Mayer,1 M. Altrich,2 C. Cordes,2 S. Fausett,2 J. Tepp,3 R. Albrecht,3 A. Fernandez-Sesma,3 B. Herold,1 I. Ramos,3 R. Madan.1

    1Pediatrics, Albert Einstein College of Medicine, Bronx, NY; 2Viracor Eurofins, Lee's Summit, MO; 3Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY

    Introduction: Biomarkers predictive of vaccine response are needed to determine the optimal timing of immunization post-transplantation. We previously found that low T-cell ELISPOT responses to…
  • 2017 American Transplant Congress

    Transcriptome Analysis of CD4-Lymphocyte Specifically Deleted of IKKbeta or NEMO in an Experimental Model of Rapid Progressive Glomerulonephritis (RPGN).

    F. Thaiss,1 J. Huang,2 M. Chen,1 H. Paust,1 G. Zahner,1 M. Alawi,2 R. Geffers,3 L. Guo.1

    1Nephrology, Univ. Hospital UKE, Hamburg, Germany; 2Bioinformatics, Univ. Hospital UKE, Hamburg, Germany; 3Genomics, Helmholtz Center Infection, Braunschweig, Germany

    RPGN is T-cell mediated and can recur after kidney transplantation. T-cell receptor stimulation leads to intracellular signaling events ultimately causing activation of transcription factors such…
  • 2017 American Transplant Congress

    Blockade of Tim-3 and PD-1 Reverses Dysfunctions of Tumor Infiltrating Lymphocytes in HBV Related Hepatocellular Carcinoma.

    A. Hu, F. Liu, X. Zhu, X. He.

    The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China

    The immunosuppression of tumor infiltrating lymphocytes (TILs) is associated with rapid progress of hepatitis B virus related hepatocellular carcinoma (HBV-HCC). The inhibition molecules of T…
  • 2017 American Transplant Congress

    Differential Effects of Immunosuppressive Drugs on DNA Methylation in T Cells.

    F. Peters,1 A. Peeters,1 L. Hofland,2 M. Betjes,1 K. Boer,1 C. Baan.1

    1Nephrology and Transplantation, Internal Medicine, Erasmus MC, University Medical Center, Rotterdam, Netherlands; 2Endocrinology, Internal Medicine, Erasmus MC, University Medical Center, Rotterdam, Netherlands

    Introduction The immune response after transplantation can be affected by DNA methylation – an epigenetic modification that regulates gene expression, including that of immune-related genes.…
  • 2017 American Transplant Congress

    Contribution of γδ T-Cell Subsets and IL-17A Release to Ischemia Reperfusion Injury (IRI) and Kidney Allograft Rejection in Mice.

    A. Thorenz,1 S. Rong,1 N. Völker,1 R. Chen,1 J. Bräsen,2 H. Haller,1 C. Klemann,3 F. Gueler.1

    1Nephrology, Hannover Medical School, Hannover, Germany; 2Pathology, Hannover Medical School, Hannover, Germany; 3Pediatric Surgery, Hannover Medical School, Hannover, Germany

    Ischemia reperfusion injury (IRI) contributes to acute allograft injury and to delayed graft function (DGF) which is a trigger for acute rejection after kidney transplantation…
  • 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

    Differences in Kinetics of IFN-y Production Between Endogenous and Allotransplant-Induced Memory T Cells.

    B. Gonzalez-Nolasco, J. Marino, W. Orent, G. Benichou.

    Center for Transplantation Sciences, Massachusetts General Hospital / Harvard Medical School, Boston, MA

    Background:CD8+ memory T cells produce IFN-g in a faster and stronger fashion than their naïve counterparts after allorecognition. Unmanipulated mice possess a proportion of endogenous…
  • 2017 American Transplant Congress

    Patients with Renal Failure Have a pERK-Dependent Defective TCR-Mediated Activation of CD4+ T Cells.

    L. Huang, N. Litjens, N. Kannegieter, M. Klepper, C. Baan, M. Betjes.

    Internal Medicine, Erasmus University Medical Center, Rotterdam, Netherlands

    Introduction Patients with end-stage renal disease (ESRD) have an impaired immune response with a prematurely aged T cell system. Mitogen-activated protein kinases (MAPKs) including extracellular…
  • 2017 American Transplant Congress

    Uptake of Extracellular Mitochondria Activates Human Endothelial Cells That Stimulate Alloreactive Effector T Cell Responses.

    T. Brennan,1 F. Feng,1 L. Lin,1 M. Song,1 Q.-J. Li,2 A. Kirk,1,2 H. Xu.1

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

    Introduction: Vascular endothelial cells (VECs), the initial barrier between host immunity and donor allograft tissue, play a critical role in allograft rejection. We investigated the…
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