Articles tagged "B cells"

2022 American Transplant Congress
Local Intragraft Humoral Immune Response in Chronic Lung Allograft Dysfunction
E. Miyamoto¹, S. C. Juvet², D. Vosoughi², J. Wang², J. Al-Refaee², T. Daigneault², A. Duong², S. Moshkelgosha², S. Keshavjee², K. Tinckam², A. Chruscinski³, D. Hwang⁴, T. Martinu²
¹Tenri Hospital Japan, University Health Network Canada, Nara, Japan, ²University Health Network, Toronto, ON, Canada, ³Multi-Organ Transplantation, University Health Network, Toronto, ON, Canada, ⁴Sunnybrook Health Science Centre, Toronto, ON, Canada
*Purpose: Donor HLA-specific antibody (DSA) and antibody against self-antigens (self-antigen antibody) can cause injury and lead to chronic lung allograft dysfunction (CLAD) after lung transplantation…
2022 American Transplant Congress
CD40 Expressed by FRC Regulates Lymph Node Structure and Function
M. W. Shirkey¹, L. Li¹, R. Abdi², J. S. Bromberg¹
¹University of Maryland School of Medicine, Baltimore, MD, ²Transplant Research Center, Harvard Medical School, Boston, MA
*Purpose: Fibroblastic reticular cells (FRC) support lymph node (LN) structure and can regulate T cell function through the CD40-CD40L pathway. Our previous work showed that…
2022 American Transplant Congress
Assessment of Circulating B Cell Developmental Stages Early After Kidney Transplantation. Preliminary Data from a Single Center
A. Fouza¹, A. Fylaktou², A. Xohelli², E. Sampani³, B. Nikolaidou², D. Asouhidou², N. Antoniadis¹, E. Kasimatis³, M. Stangou³, G. Tsoulfas¹, A. Papagianni³
¹Division of Transplantation, Department of Surgery, Aristotle University of Thessaloniki, Thessaloniki, Greece, ²National Peripheral Histocompatibility Center, Immunology Department, Hippokration General Hospital of Thessaloniki, Thessaloniki, Greece, ³Department of Nephrology, Aristotle University of Thessaloniki, Thessaloniki, Greece
*Purpose: B lymphocytes (BL) is an important immune component in the function of kidney transplants, through antibody production, antigen-presentation to T cells, secretion of cytokines,…
2022 American Transplant Congress
Characterization Of Gzmb+ Bregs Using Single Cell Rnaseq
N. Sailliet, H. Le Mai, A. Dupuy, C. Fourgeux, M. Chesneau, J. Poschmann, R. Danger, S. Brouard
CRT2I INSERM UMR1064, Nantes, France
*Purpose: Granzyme B (GZMB)+ B cells are increased in blood from transplanted patients who tolerate a kidney graft without immunosuppressive treatment. We demonstrated that these…
2022 American Transplant Congress
Lung Allograft-Resident Eosinophils Maintain Long-Term Graft Integrity by Restraining Humoral Alloimmunity
Z. Mei¹, Y. Guo¹, D. Li¹, M. Khalil¹, A. Banerjee¹, A. Gelman², D. Kreisel², A. Krupnick³
¹Department of Surgery, University of Maryland, Baltimore, Baltimore, MD, ²Washington University in St. Louis, St. Louis, MO, ³Department of Surgery, University of Maryland, Baltimore, baltimore, MD
*Purpose: The finding that eosinophils facilitate immunosuppression-mediated acceptance of murine lung allograft by downregulating alloreactive CD8+ T cells has been recently described by our group.…
2022 American Transplant Congress
Deficiency of Antibody-Suppressor CXCR5⁺CD8⁺ TCells (Not CD4⁺ T_regs) Drive High Alloantibody Production in CCR5 KO Kidney Transplant Recipients
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: Kidney transplant (KTx) into CCR5 KO mice is an excellent model to study AMR immunobiology due to high alloantibody (alloAb) production, rapid allograft rejection,…
2022 American Transplant Congress
Clazakizumab® (anti-il-6) Desensitization in Highly-HLA Sensitized Patients Awaiting Kidney Transplant (nct03380962): Long-Term Follow Up
A. Vo¹, J. Tang¹, N. Ammerman¹, E. Huang¹, X. Zhang², M. Haas³, A. Peng¹, R. Najjar¹, S. Williamson¹, C. Meyers¹, S. Sethi¹, K. Lim¹, M. Gillespie¹, N. Badash¹, S. Jordan¹
¹Comprehensive Transplant Center, Cedars Sinai Medical Ctr, Los Angeles, CA, ²HLA Laboratory, Cedars Sinai Medical Ctr, Los Angeles, CA, ³Pathology, Cedars Sinai Medical Ctr, Los Angeles, CA
*Purpose: IL-6 is a cytokine critical for B-cell activation and IgG production. Clazakizumab (CSL Behring LLC) is a humanized monoclonal aimed at the cytokine IL-6.…
2022 American Transplant Congress
Transitional-1 B Cell IL-10/TNFα Ratio Risk-Stratifies Renal Transplant Patients with Early Borderline Change
A. Cherukuri, P. Randhawa, S. Hariharan, D. Rothstein
Thomas E. Starzl Transplantation Institute, UPMC, Pittsburgh, PA
*Purpose: Recent studies have shown that Banff borderline change (BLC) on allograft biopsies (Bx) is associated with decreased graft survival. However, many patients with BLC…
2022 American Transplant Congress
Bone Marrow Resident Long-Lived Plasma Cells as Source of Chronic Donor-Specific Antibodies
M. Muckenhuber, S. Pichler, A. M. Weijler, T. Wekerle
Dept. of General Surgery, Div. of Transplantation, Medical University of Vienna, Vienna, Austria
*Purpose: The importance of bone marrow resident plasma cells for long-lasting humoral immunity has been highlighted in several models for vaccination and infectious diseases. To…
2022 American Transplant Congress
Dynamic Changes of Serum Soluble B Cell Activating Factor in Kidney Transplant with De Novo Donor Specific Antibody
S. Wu¹, X. Su¹, Y. Gao¹, Y. Wei¹, Q. Ye¹, M. Huang², Y. Chen¹, J. Wang¹, Q. Zhang³, Q. Fu¹, J. Li², H. Huang², B. Xu², H. Zhang¹, L. Liu², C. Wang²
¹Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China, ²The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China, ³Charité - Universitätsmedizin Berlin, Berlin, Germany
*Purpose: De novo donor specific antibody (dnDSA) plays a crucial role in the development of antibody mediated rejection (ABMR) and is correlated to the worse…