ATC Abstracts

American Transplant Congress abstracts

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Articles tagged "knockout"

  • 2015 American Transplant Congress

    miR-155 Different Roles in UCB iTreg and nTreg

    Y. Lu, L. Lu.

    Liver Transplantation Center of First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China.

    OBJECTIVES:miR-155 has been associated with both innate and adaptive immune responses. SOCS1, which is involved in Treg survival and function, is a direct target of…
  • 2015 American Transplant Congress

    Macrophage Specific β-Catenin Controls ROCK/PTEN Function and Regulates Innate Immunity in Liver Inflammation

    S. Yue,1 X. Zhou,2 M. Zhou,1 Y. Zhai,1 R. Busuttil,1 Q. Ying,2 J. Kupiec-Weglinski,1 B. Ke.1

    1Dumont-UCLA Transplant Center, Dept. of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA; 2Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research at USC, Dept. of Stem Cell Biology & Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA.

    Background: It has been shown that β-catenin is an important regulator of cell development, regeneration, and carcinogenesis. Our previous studies demonstrated the key role of…
  • 2015 American Transplant Congress

    Leukocyte Associated Immunoglobulin-Like Receptor 1 inhibits Th1 But Enhances Th17 Responses

    V. Agashe,1 M. Keller,2 L. Haynes,1 E. Jankowska-Gan,1 J. Sullivan,1 J. Kernien,1 H. Suzuki,3 D. Wilkes,4 W. Burlingham.1

    1Surgery, UW Madison, Madison, WI; 2Tulane University, New Orleans, LA; 3Chiba Graduate School of Medicine, Chiba, Japan; 4Indiana University School of Medicine, Indianapolis, IN.

    Background: Leukocyte Associated Immunoglobulin-like Receptor 1 (LAIR1), is a transmembrane receptor expressed by immune cells. It recognizes collagen repeats via its extracellular domain and has…
  • 2015 American Transplant Congress

    Eomes-Expressing CD8+ T Cells and Th17 Cells Mediate Costimulatory Blockade-Resistant Allograft Rejection in Mice

    M. Sabet-Baktach,1 E. Eggenhofer,1 P. Renner,1 M. Lantow,1 H. Schlitt,1 E. Geissler,1 A. Kroemer.1,2

    1Department of Surgery, University Hospital Regensburg, Regensburg, Germany; 2Georgetown Transplant Institute, Georgetown Transplant Institute, Washington, DC.

    The etiology of costimulatory blockade-resistant allograft rejection remains unclear. Therefore, the purpose of this study was to evaluate the responsiveness of distinct CD4+ and CD8+…
  • 2015 American Transplant Congress

    miRNA-181 Promotes Graft Prolongation by Plasmacytoid Dendritic Cells By Increasing T Regulatory Cells and Decreasing B Cells as Revealed By Cytometry By Time-Of-Flight

    A. Lau,1,2 M. Vitalone,1 X. Qu,1 T. Shawler,1 O. Martinez,1 C. Esquivel,1 S. Krams.1

    1Surgery, Stanford University, Stanford, CA; 2Pediatrics, UCSF, San Francisco, CA.

    Liver allografts are well tolerated and other solid organ allografts, when transplanted concurrently with livers, show improved outcomes. However, the mechanisms underlying “hepatic tolerance” have…
  • 2015 American Transplant Congress

    Blocking CD40/CD154 Co-Stimulation Prevents Acute Antibody-Mediated Renal Allograft Rejection Induced by Memory CD4 T Cells

    V. Gorbacheva, R. Fan, A. Valujskikh.

    Immunology, The Cleveland Clinic, Cleveland, OH.

    Immunosuppression-resistant alloreactive memory CD4 T cells induce robust responses against organ transplants. In murine heart allograft recipients donor-reactive memory CD4 T cells provide help for…
  • 2015 American Transplant Congress

    Donor CD47 Plays a Critical Role in the Control of Alloreactive T Cell Activation Following Hepatocyte Transplantation

    M. Zhang,1,2 H. Wang,1 N. Navarro-Alvarez,1 Y. Zheng,2 Y.-G. Yang.1

    1Columbia Center for Translational Immunology, Columbia University Medical Center, New York, NY; 2First Hospital, Jilin University, Changchun, Jilin, China.

    Background: The interspecies incompatibility of CD47 is an important mechanism triggering rejection of cellular xenografts, including both hematopoietic and non-hematopoietic cells, by recipient macrophages. Our…
  • 2015 American Transplant Congress

    Myeloid Cell-Specific Heme Oxygenase-1 Is Crucial for Hepatoprotection in Liver Ischemia-Reperfusion Injury

    K. Nakamura,1 M. Zhang,2 B. Ke,1 R. Busuttil,1 J. Araujo,2 J. Kupiec-Weglinski.1

    1Surgery, Liver Transplant, University of California, Los Angeles, Los Angeles, CA; 2Medicine, Division of Cardiology, University of California, Los Angeles, Los Angeles, CA.

    Background and Aim: Heme oxygenase-1 (HO-1), an anti-oxidant enzyme, is essential in tissue resistance against innate immunity driven ischemia-reperfusion injury (IRI). Our group was the…
  • 2015 American Transplant Congress

    Damage Associated Molecular Patterns (DAMPs)-Activated Neutrophil Extracellular Trap Formation Exacerbates Liver Ischemia/Reperfusion Injury

    H. Huang, S. Tohme, A. Al-Khafaji, A. Tsung.

    Department of Surgery, University of Pittsburgh, Pittsburgh, PA.

    Liver ischemia/reperfusion (I/R) injury is a clinically important phenomenon encountered during transplantation that contributes to initial graft function and subsequent allograft rejection. Formation of neutrophil…
  • 2015 American Transplant Congress

    Interleukin-17 Deficiency Attenuates Renal Allograft Injury and Prolongs Survival in a Murine Transplantation Model

    T. Kwan,1,2 S. Chadban,1,2 J. Ma,1,2 S. Bao,2,3 S. Alexander,2,4 H. Wu.1,2

    1Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia; 2Renal Medicine, Royal Prince Alfred Hospital, Sydney, New South Wales, Australia; 3Discipline of Pathology, School of Medical Sciences, Sydney, New South Wales, Australia; 4Centre for Kidney Research, The Children's Hospital at Westmead, Sydney, New South Wales, Australia.

    Aim:To investigate the role of IL-17 in allograft rejection using a murine model of fully MHC-mismatched renal transplantation.Methods:Life-sustaining kidney transplants were performed in nephrectomized mice:…
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