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American Transplant Congress abstracts

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Articles tagged "B cells"

  • 2022 American Transplant Congress

    TNFRSF13B Genotype Determines the Properties of Donor-Specific B Cells

    M. Cascalho1, M. Garcia de Mattos Barbosa1, T. Pasieka1, E. Farkash2, R. Sung3, M. Doshi4, J. Platt4

    1Surgery, University of Michigan, Ann Arbor, MI, 2Pathology, University of Michigan, Ann Arbor, MI, 3University of Michigan Health System, Ann Arbor, MI, 4University of Michigan, Ann Arbor, MI

    *Purpose: The TNFRSF13B gene is among the 5% most polymorphic genes in humans. The phenotypes of the most frequent TNFRSF13B variants in humans and mice…
  • 2022 American Transplant Congress

    How Does Anti-CD38 Antibody Treatment (Daratumumab) Impact Immunological Assessment in Solid Organ Transplantation?

    S. Ho1, K. Putnam2, C. Peiter2, W. Herczyk2, J. Gerlach3, E. Campagnaro4, Y. Lu4, K. Woodside4, M. Cusick4

    1Gift of Hope Organ & Tissue Donor Network, Itasca, IL, 2Gift of Life Michigan, Ann Arbor, MI, 3Michigan State University, East Lansing, MI, 4University of Michigan Medicine, Ann Arbor, MI

    *Purpose: We report the first case of Dara interference of routine pre-transplant (Tx) crossmatch (XM) repeatedly causing aberrant false positives which inadvertently delayed Tx for…
  • 2022 American Transplant Congress

    Complement 5 Regulation Ameliorates Antibody-Mediated Rejection After Liver Transplantation in Rats

    T. Tajima1, K. Hata1, J. Kusakabe1, H. Miyauchi1, X. Zhao1, S. Kageyama1, T. Okamoto1, Y. Wang2, E. Hatano1

    1Dept. of HBP Surgery & Transplantation, Kyoto University, Kyoto, Japan, 2Alexion Pharmaceuticals Inc., New Haven, CT

    *Purpose: Antibody-mediated rejection (AMR) is a refractory rejection after donor-specific antibody (DSA)-positive or blood-type incompatible organ transplantation. Since AMR significantly deteriorates transplant outcomes, there is…
  • 2022 American Transplant Congress

    Influence of Regulatory B Cells on B Cells

    Q. Fu1, K. M. Lee2, K. Deng2, D. Agarwal1, R. Matheson3, T. Press1, J. Lei4, H. Yang5, C. LeGuern2, S. Deng5, J. F. Markmann2

    1Center for Transplant Science, MGH, Boston, MA, 2Massachusetts General Hospital, Boston, MA, 3Transplantation Surgery Research, Massachusetts General Hospital, Boston, MA, 4Surgery, Mass General, Boston, MA, 5Sichuan Provincial People's Hospital, University of Electronic Sciences and Technology of China, Chengdu, China

    *Purpose: Our previous study showed that Bregs-TLR, one type of previously studied Breg expanded in vitro, are capable of suppressing naïve B cell proliferation in…
  • 2022 American Transplant Congress

    Peripheral Blood Immune Cell Profiles of Corneal Transplant with and without Acute Rejection

    J. Hjortdal1, M. Griffin2, C. C. Murphy3, S. Brouard4, N. Degauque4

    1Department of Ophthalmology, Aarhus University Hospital, Aarhus, Denmark, 2National University of Ireland, Galway, Galway, Ireland, 3Royal Victoria Eye and Ear Hospital, Dublin, Ireland, 4Université de Nantes, CHU Nantes, Inserm, Centre de Recherche en Transplantation et Immunologie, UMR 1064, ITUN, Nantes, France

    *Purpose: Acute rejection (AR) of allogeneic corneal transplantation (CT) has a profound effect on subsequent graft survival, indicating that immunological damage is often not fully…
  • 2022 American Transplant Congress

    Dynamic Changes in Titer and Specificity Autoantibodies in Chronic Bm12 to B/6 Kidney Rejection

    I. Sayin1, D. Yin1, D. Ghosh2, M. Clark2, A. Chong1

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

    *Purpose: Loss of autoreactive B cell tolerance and production of non-HLA autoantibodies have been observed in patients undergoing chronic rejection, however, how autoreactive B cells…
  • 2022 American Transplant Congress

    Characterization of GZMB+ Bregs Transcriptome and Their Impact on Target Cells in Single-Cell RNA-seq

    N. Sailliet, H. Le Mai, A. Dupuy, F. Cynthia, M. Chesneau, J. Poschmann, R. Danger, S. Brouard

    CRTI- INSERM UMR 1064, Nantes, France

    *Purpose: During the inflammatory process, the immune system capacity to regulate itself is mandatory to balance effector positive feedback, avoid allergies and autoimmunity. Different subsets…
  • 2022 American Transplant Congress

    Long-Term Kidney Allotransplant Acceptance is Defined by a Shift from a T Cell to a B Cell Rich Immune Microenvironment Within the Graft

    E. S. Szuter1, T. Yokose1, M. T. Guinn1, J. Ge2, I. Rosales3, B. Kwon4, P. S. Russell1, A. Cuenca2, D. Kreisel5, P. Sage6, J. C. Madsen1, R. B. Colvin3, A. Alessandrini1

    1Center for Transplantation Sciences, Massachusetts General Hospital, Boston, MA, 2Department of Surgery, Boston Children's Hospital, Boston, MA, 3Department of Pathology, Massachusetts General Hospital, Boston, MA, 4Harvard College, Cambridge, MA, 5Department of Surgery, Washington University, St. Louis, MO, 6Transplantation Research Center, Renal Division, Brigham and Women’s Hospital, Boston, MA

    *Purpose: Mouse kidney allografts are spontaneously accepted in select, fully-mismatched donor-recipient strain combinations, such as DBA/2J to C57BL/6 (B6). Tolerant renal grafts develop aggregates of…
  • 2022 American Transplant Congress

    Disruption of B Cell Population is Associated with Increased Infections in Pediatric Transplant Recipients

    B. Geng, L. Loop, C. Anterasian, D. Mortazavi, J. Kitsen, C. Collins, K. Newton, E. Ingulli

    Pediatrics, UCSD Rady Children's, San Diego, CA

    *Purpose: Solid-organ transplant recipients are placed on long-term immunosuppression, preventing graft rejection but increasing the risk of infection. Pediatric transplant recipients are at increased risk…
  • 2022 American Transplant Congress

    Tolerant B Cells Suppress Memory B Cells in a Donor Specific Manner in CoB Mediated Transplantation Tolerance

    S. Durgam1, D. Yin1, M. Alegre2, A. Chong1

    1Surgery, section of transplant immunology, University of Chicago, Chicago, IL, 2Medicine, section of rheumatology, University of Chicago, Chicago, IL

    *Purpose: We previously reported that B cells in recipients made tolerant to fully mismatched heart allografts by anti-CD154+donor spleen cells (CoB) become dysfunctional in their…
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