ATC Abstracts

American Transplant Congress abstracts

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Articles tagged "T helper cells"

  • 2018 American Transplant Congress

    Shikonin Inhibits Th17 Development through Repressing STAT3 Activation

    H. Fang,1 R. Zhang,1 F. Liang,1 Q. Chen,2 J. Ochando,3 Y. Ding,1 J. Xu.1

    1Department of Immunology, Capital Medical University, Beijing, China; 2Department of Thoracic Surgery, Chaoyang Hospital, Beijing, China; 3Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY.

    Background: Th17-mediated inflammatory responses are detrimental for allograft acceptance and long-term survival after transplantation. Shikonin is a naphthoquinone pigment isolated from a traditional medicinal herb…
  • 2018 American Transplant Congress

    Circulating T Follicular Helper Cells Expand Following Transplantation and Exhibit a CD44hi Phenotype That Correlates with Peak Germinal Center Alloreactivity

    G. La Muraglia II, M. Wagener, M. Ford, R. Badell.

    Emory Transplant Center, Atlanta.

    It is increasingly well-recognized that donor-specific antibodies (DSA) play a significant role in the development of chronic rejection and fibrosis that contribute to late renal…
  • 2018 American Transplant Congress

    IL-17 is Critical for Airway Epithelial Injury after Transplantation

    R. Zhang,1 H. Fang,1 Q. Chen,2 J. Ochando,3 Y. Ding,1 J. Xu.1

    1Department of Immunology, Capital Medical University, Beijing, China; 2Department of Thoracic Surgery, Chaoyang Hospital, Beijing, China; 3Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY.

    Background: Obliterative bronchiolitis is the major obstacle limiting long-term allograft survival of lung transplantation. Airway epithelium is the primary target in obliterative airway diseases. Th17…
  • 2018 American Transplant Congress

    IL-21 Regulates Creation of Tertiary Lymphoid Organs in Chronic Allograft Rejection

    J. Breidenbach, C. Baum, P. Schroder, S. Stepkowski.

    Medical Microbiology and Immunology, University of Toledo College of Medicine and Life Science, Toledo, OH.

    Background: IL-21 is a cytokine expressed almost exclusively by cells of the adaptive immune system, making it an attractive target for reducing chronic allograft rejection…
  • 2018 American Transplant Congress

    IL-6 Inhibition with Tocilizumab to Promote Tregs and Control Renal Graft Inflammation: A Prospective Randomized Controlled Trial

    S. Chandran, J. Leung, Z. Laszik, Q. Tang, C. Hu, M. Sarwal, F. Vincenti.

    UCSF, San Francisco.

    Background: IL-6, a proinflammatory cytokine & key regulator of Treg/Th17, is strongly associated with renal graft rejection. In theory, IL-6 blockade with tocilizumab (TCZ), a…
  • 2018 American Transplant Congress

    Engineering Regulatory T Cells with Interleukin (IL-)2 Nanogel for Improved Alloimmune Suppression

    S. Eskandari,1 M. Bandeira Melo,2 J. Assaker,1 A. Mansouri,1 S. Cai,1 B. Al Dulaijan,1 M. Mohamed,1 D. Irvine,2 J. Azzi.1

    1Transplantation Research Center, Brigham and Women's Hospital, Harvard Medical School, Boston, MA; 2Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA.

    Clinical trials of adoptively transferred regulatory T cells (TRegs) have been hindered by the short lifespan of these transferred TRegs. Systemic injection of low-dose interleukin…
  • 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

    Circulating Follicular Helper T Cells (cTfh) in Renal Transplantation: Utility as Rejection Biomarker

    R. Laguna-Goya,1 A. Utrero-Rico,1 F. Cano-Romero,1 E. Gómez-Massa,2 D. Arroyo,1 P. Auñon-Rubio,3 A. Sevillano-Prieto,3 M. Castro-Panete,2 A. Andrés,3 E. Paz-Artal.1,2

    1Immunodeficiencies e Immunology Group, Research Institute of Hospital 12 de Octubre (i+12), Madrid, Spain; 2Immunology, Hospital 12 de Octubre, Madrid, Spain; 3Nephrology, Hospital 12 de Octubre, Madrid, Spain.

    Introduction: Antibody (Ab) mediated rejection is responsible for 30-50% of renal graft failures. Follicular helper T cells (Tfh) are required for the differentiation of B…
  • 2018 American Transplant Congress

    Recipient Conditioning Results in IL-33 Support of Potent Th1 Alloimmune Responses after CD4+ T Cells Upregulate ST2 during Lymphopenia Induced Proliferation

    G. Dwyer,1 L. Mathews,1 A. Lucas,1 B. Blazar,2 H. Turnquist.1

    1Starzl Transplantation Institute and Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA; 2Department of Pediatrics, University of Minnesota, Minneapolis, MN.

    Purpose: IL-33 is typically associated with support of Th2 and Treg responses. Yet, recipient conditioning before allogeneic hematopoietic cell transplantation (alloHCT) releases IL-33 to promote…
  • 2018 American Transplant Congress

    Immunologic Impact of Tocilizumab Treatment in Kidney Transplant Recipients with Allograft Inflammation

    J. Leung, S. Chandran, F. Vincenti, Q. Tang.

    UCSF, San Francisco.

    Background: Proinflammatory cytokine IL-6 increases effector/memory T-cells, induces Th17 cells and prevents the induction of Tregs. IL-6 expression in kidney biopsies is elevated during acute…
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