Articles tagged "B cells"

2022 American Transplant Congress
Characterization Of Local Antibody Responses In Human Cardiac Allograft Vasculopathy
S. B. See¹, L. J. Stanton¹, P. Roy¹, S. Mashiko¹, E. R. Vasilescu², C. C. Marboe², M. Szabolcs², M. V. Habal³, M. Farr³, S. Restaino³, Y. Naka⁴, D. M. Mancini⁵, J. C. Madsen⁶, R. G. King⁷, E. P. Kransdorf⁸, E. Zorn¹
¹CCTI, Columbia University Irving Medical Center, New York, NY, ²Pathology and Cell Biology, Columbia University Irving Medical Center, New York, NY, ³Medicine, Columbia University Irving Medical Center, New York, NY, ⁴Surgery, Columbia University Irving Medical Center, New York, NY, ⁵Cardiology, Icahn School of Medicine, New York, NY, ⁶CTS, Massachusetts General Hospital, Boston, MA, ⁷Microbiology, University of Alabama, Birmingham, AL, ⁸Cedars-Sinai Heart Institute, Los Angeles, CA
*Purpose: Cardiac allograft vasculopathy (CAV) is the leading cause of heart graft recipient mortality after five years post-transplant. A major hurdle to improving outcomes is…
2022 American Transplant Congress
Synergistic Effect of CXCR5⁺CD8⁺ T_Ab-supp Cell Adoptive Cell Therapy and mTOR Inhibition (but Not Calcineurin Inhibition) in Suppressing Alloantibody Following Kidney Transplant in Mice
J. L. Han¹, J. M. Zimmerer¹, Q. Zeng², S. Chaudhari¹, C. K. Breuer², G. L. Bumgardner¹
¹Dept. of Surgery, The Ohio State University, Columbus, OH, ²Center for Regen. Med., The Research Institute at Nationwide Children's Hospital, Columbus, OH
*Purpose: We have reported that CXCR5+CD8+TAb-supp cells mediate suppression of alloantibody (alloAb) production and prolong graft survival in both hepatocellular and kidney transplant (KTx) mouse…
2022 American Transplant Congress
The Roles of Intrarenal B Cells in Regulating Antibody Mediated Rejection After Kidney Transplantation
H. Zhang¹, C. Cavazzoni¹, E. Bechu¹, B. Hanson¹, M. A. Podestà¹, D. Kreisel², A. Alessandrini³, P. Sage¹
¹Transplantation Research Center, Renal Division, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, ²Department of Surgery, Washington University in St Louis, St. Louis, MO, ³Center for Transplantation Sciences, Department of Surgery, Massachusetts General Hospital, Harvard, Boston, MA
*Purpose: Alloimmune rejection after kidney transplantation is associated with substantial infiltration of immune cells such as T and B cells in transplanted grafts. However, the…
2022 American Transplant Congress
High Dimensional Analysis of IL-10-Producing Human B Cells and Their Characterization in Operationally Tolerant Transplant Recipients
M. C. Glass, D. Glass, J. Oliveria, B. Mbiribindi, C. Esquivel, S. M. Krams, S. C. Bendall, O. M. Martinez
Stanford University Sch of Med, Stanford, CA
*Purpose: Regulatory B cells (Breg) participate in control of alloimmune responses in murine models of graft tolerance and are associated with improved outcomes in clinical…
2022 American Transplant Congress
Faster B Cell Rebound is Observed Following Xenotransplantation Compared to Allotransplantation in a Highly Sensitized Nonhuman Primate Kidney Transplantation Model
I. DeLaura, M. Manook, D. Olaso, J. Yoon, R. Baldi, S. Knechtle, J. Kwun
Surgery, Duke Transplant Center, Durham, NC
*Purpose: Xenotransplantation outcomes have been greatly improved due to the advent of genetically engineered pigs and agents targeting the CD40-CD40L signaling pathway. However, studies have…
2022 American Transplant Congress
Marginal Zone B Cells Support T Cell Reconstitution Following ATG Lymphoablation in Heart Allograft Recipients.
Y. Yamamoto, R. Fan, M. Nicosia, V. Gorbacheva, R. Fairchild, A. Valujskikh
Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH
*Purpose: Lymphoablation with anti-thymocyte globulin (ATG) is a common therapy in solid organ transplantation. However homeostatic proliferation of pre-existing memory T cells undermines the graft-prolonging…
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…
2021 American Transplant Congress
The Effect of Daratumumab (Dara, Humanized Anti-CD38 Monoclonal Antibody) on Immune Cells In Vitro and in a HLA-Sensitized Kidney Transplant Patient (HS KTx Pt) Desensitized (DES) with Dara
S. Ge¹, M. Chu¹, A. De Guzman¹, E. Ortiz¹, A. Vo², N. Ammerman², S. C. Jordan², M. Toyoda¹
¹Transplant Immunology Laboratory, Cedars Sinai Medical Center, Los Angeles, CA, ²Comprehensive Transplant Center, Cedars Sinai Medical Center, Los Angeles, CA
*Purpose: Antibody-Mediated Rejection (ABMR), primarily mediated by B cells, plasma cells (PC) and antibodies (Ab), is an obstacle for successful transplantation in HS KTx Pts.…
2021 American Transplant Congress
Selective Bcl-2 Inhibition for Induction of Mixed Chimerism and Renal Allograft Tolerance without Myelosupression
G. Lassiter¹, T. Hirose¹, H. Sasaki¹, D. Ma¹, T. Oura¹, A. Dehnadi¹, A. Cosimi¹, P. Cippa², T. Fehr³, T. Kawai¹
¹Center for Transplantation Sciences, Massachusetts General Hospital, Boston, MA, ²Division of Nephrology, Ente Ospedaliero Cantonale, Lugano, Switzerland, ³Division of Nephrology, University of Zurich, Zurich, Switzerland
*Purpose: Immunologic tolerance of renal allograft has been achieved by induction of hematopoietic chimerism through donor bone marrow transplantation (DBMT). The myeloablative and genetic toxicity…

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