Articles tagged "B cells"

2020 American Transplant Congress
Dominant Negative Polymorphisms in TNFRSF13B are Associated with Poor Transplant Outcome
M. G. de Mattos-Barbosa¹, E. T. Luning Prak², E. Farkash³, J. L. Platt⁴, M. Cascalho⁴
¹Transplant Surgery, University of Michigan, Ann Arbor, MI, ²Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, ³Pathology, University of Michigan, Ann Arbor, MI, ⁴Transplant Surgery and Microbiology and Immunology, University of Michigan, Ann Arbor, MI
*Purpose: Transmembrane Activator and CAML Interactor (TACI) is a highly polymorphic receptor that controls B cell activation and differentiation into antibody-secreting cells. Allelic variants of…
2020 American Transplant Congress
Passenger Lymphocyte Syndrome Due to Anti-Rh(D) Reactivity after Kidney Transplantation: A Case Report
S. Nemr¹, S. Bani Hani¹, E. Klohe², C. Gresens³, S. Desmond¹, O. Ojogho¹
¹Kidney and Pancreas Transplant Program, Providence Sacred Heart Medical Center & Children's Hospital, Spokane, WA, ²HLA Laboratory, Inland Northwest Blood Center, Spokane, WA, ³Inland Northwest Blood Center, Spokane, WA
*Purpose: PLS can occur soon after solid organ transplantation when donor-derived antibodies against recipient red cell antigens are produced and lead to hemolysis. The anemia…
2020 American Transplant Congress
Belatacept Suppresses the B-Cell Alloresponse in the Lower Range of Therapeutic Trough Concentrations
C. Ashokkumar¹, R. Townsend², M. Roberts², T. Lehman², B. Gavin², B. Spishock¹, R. Sindhi¹
¹Plexision, Pittsburgh, PA, ²Bristol-Myers-Squibb, Princeton, NJ
*Purpose: Background: Kidney recipients treated with the T-cell costimulation blocker, belatacept, experience a higher incidence of acute cellular rejection (ACR) and lower incidence of donor-specific…
2020 American Transplant Congress
Humoral Sensitization Overrides Pregnancy-Induced T Cell Transplantation Tolerance
D. Tran¹, A. Suah¹, S. Khiew¹, J. Young¹, M. Andrade¹, J. Pollard¹, Q. Wang¹, D. Yin¹, G. Chalasani², M. Alegre¹, A. Chong¹
¹Department of General Surgery, University of Chicago, Chicago, IL, ²Thomas E. Starzl Transplantation Institute, University of Pittsburgh School of Medicine, Pittsburgh, PA
*Purpose: There are ample clinical data that a major long-term consequence of pregnancy is humoral allosensitization. Paradoxically, pregnancy is also a state of spontaneous allogeneic…
2020 American Transplant Congress
Irf8-Relevant Mechanism in B Cell Regulation In Vitro
Q. Fu¹, K. Deng², H. Yang¹, J. F. Markmann², S. Deng¹
¹Organ Transplantation Center, and School of Medicine, University of Electronic Sciences and Technology of China, Chengdu, China, ²Center for Transplantation Sciences, MGH, Boston, MA
*Purpose: Previously, we had reported that IFN regulatory factor 8 (IRF8) could be used for the identification of interstitial fibrosis and tubular atrophy (IFTA) with…
2020 American Transplant Congress
Single Cell Gene Profiling Highlights Novel B Cell Populations Associated with the Development of Bronchiolitis Obliterates Syndrome after Lung Transplantation
N. F. Smirnova¹, K. Riemondy², S. Collins¹, J. Hesselberth², O. Eickelberg¹
¹Dept of Medicine - Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado - Anschutz Medical Campus, Aurora, CO, ²University of Colorado - Anschutz Medical Campus, Aurora, CO
*Purpose: The occurence of bronchiolitis obliterans syndrome (BOS) accounts for a poor long term prognosis after lung transplantation (LTx). Despite immunosuppressive T cell-targeting therapies the…
2020 American Transplant Congress
New Everolimus Administration Targeting the Prevention of the Development of Antibody-Mediated Rejection Considering the Comparison of Growth and Survival in IgG and IgM Memory B Cells
Y. Matsuda¹, R. Imamura¹, H. Tezuka², S. Takahara¹
¹Osaka University Graduate School of Medicine, Suita, Japan, ²Fujita Health University, Toyoake, Japan
*Purpose: Some reports indicated that immunoglobulin (Ig) M antibodies corresponding to donor-specific antigen in addition to IgG antibodies are closely involved in the activation of…
2020 American Transplant Congress
HLA-Antibody Develops Preferentially in Healthy Subjects with a T-bet^hiB Cell Response to Vaccine
A. Nellore, G. R. Martens, J. T. Killian, J. Houp, E. Zumaquero, B. Mousseau, J. Bradley, F. Zhou, P. A. Goepfert, F. E. Lund
University of Alabama, Birmingham, AL
*Purpose: Bystander B cell differentiation into antibody (Ab) secreting cells (ASCs) may augment alloimmunity in the HLA-sensitized patient. Recently, a population of FcrL5+IgDnegB cells that…
2020 American Transplant Congress
Anti-Thymocyte Globulin Promotes Tfh Cells Differentiation and Alloantibody Production
R. Benedetti Gassen, B. Aoyama, M. Lima, T. Borges, M. Pérez-Sáez, N. Murakami, P. Sage, J. Pascual, L. V. Riella
Transplantation Research Center, Brigham and Women's Hospital, Boston, MA
*Purpose: Antibody-mediated rejection is a major cause of long-term graft loss. T follicular helper (Tfh) cell is CD4+ T cell subset that is specialized in…
2020 American Transplant Congress
Non-Human Primate B Cells Into Regulatory B Cells by Activation with CpG
K. Lee¹, C. Rickert¹, K. Deng¹, N. Feeney¹, N. Tanimine², Q. Fu¹, G. Huai¹, J. Lei¹, C. Leguern¹, J. Markmann¹
¹Center for Transplantation Sciences, Massachusetts General Hospital, Boston, MA, ²Gastroenterological Transplantation Surgery, Hiroshima University, Hiroshima, Japan
*Purpose: We previously generated Toll like receptor (TLR)-activated B cells in rodent settings. These B cells can suppress T cell proliferation via in vitro mixed…

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