Articles tagged "Alloantibodies"

2019 American Transplant Congress
Variable Glycosylations of Anti-HLA Antibodies Detected with Single Antigen Beads in Kidney Transplant Recipients
Y. Chang¹, N. Lemp², J. Cicciarelli¹, T. Shah³, D. Min⁴
¹Mendez National Institute of Transplantation Foundation, Los Angeles, CA, ²Transplantation Research, Mendez National Institute of Transplantation Foundation, Los Angeles, CA, ³St. Vincent Medical Center, Los Angeles, CA, ⁴Western Univ of Health Sciences, Pomona, CA
*Purpose: Differential glycosylation of Immunoglobulin G (IgG) is known to affect its effector functions by modulating interactions with its binding partners, such as C1q or…
2019 American Transplant Congress
Ligation Of Hla Class Il Molecules Disrupts Endothelial Barrier Through Src-dependent Ve-cadherin Destabilization
F. Li¹, R. A. Sosa¹, N. M. Valenzuela¹, E. Rozengurt², E. F. Reed¹
¹Department of Pathology and Laboratory Medicine, University of California, Los Angeles, Los Angeles, CA, ²Digestive Diseases Research Center, University of California, Los Angeles, Los Angeles, CA
*Purpose: Microvascular inflammation, vascular permeability, and accumulation of intravascular mononuclear cells are characteristics of acute and chronic antibody-mediated rejection. Vascular endothelial cadherin (VE-Cadherin) is a…
2019 American Transplant Congress
Interleukin-27 is Required for Donor Specific Antibody Production in Response to Heart Allograft Transplantation
M. Nicosia, S. Miyairi, R. Fan, A. Beavers, V. Gorbacheva, A. Valujskikh
Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH
*Purpose: Interleukin-27 (IL-27), a member of IL-12 cytokine family, is involved in both pro- and anti-inflammatory immune responses. Previously we reported that B cell derived…
2019 American Transplant Congress
Development of De Novo DSA after Kidney Transplant Correlates with Low Quantity of Peripheral Blood “Antibody-Suppressor” CD8⁺T Cells
J. Zimmerer¹, M. Basinger¹, B. Ringwald¹, R. Pelletier¹, A. Rajab¹, A. El-Hinnawi¹, M. Abdel-Rousoul², H. Parekh³, K. Washburn¹, G. Bumgardner¹
¹Surgery, The Ohio State University Wexner Medical Center, Columbus, OH, ²Center for Biostatistics, The Ohio State University Wexner Medical Center, Columbus, OH, ³Clinical Histocompatibility Laboratory, The Ohio State University Wexner Medical Center, Columbus, OH
*Purpose: It is well known that CD4+ T cells provide “help” for antibody production in vivo. Our group discovered a novel subset of murine antibody-suppressor…
2019 American Transplant Congress
α -1,3-galactosyltransferase Knockout Porcine Tissue And Organ May Reduce The Risks Of Antibody Mediated Rejection Via Less Rhesus Igm Cross-reactivity.
J. Yoon, B. Ezekian, M. Manook, J. Kwun, S. Knechtle
Duke Transplant Center, Durham, NC
*Purpose: Previously, we observed that sera from rhesus macaques contained preformed antibodies against wild type (WT) swine splenocytes. In the context of xenotransplantation, preformed xenoantibodies…
2019 American Transplant Congress
Upregulation of Endothelial HLA Class II as a Marker of Antibody Mediated Rejection in Heart Allograft Biopsies
Q. Cai, Y. Butt, A. Hendricks, J. Torrealba
Pathology, UTSW Medical Ctr, Dallas, TX
*Purpose: In 2013, the ISHLT (International Society of Heart and Lung Transplant) introduced the working classification for pathological changes associated with antibody-mediated rejection of the…
2019 American Transplant Congress
Iguratimod Attenuates the Production of Donor Specific Antibody by Inducing CD19⁺Tim-1⁺ Regulatory B Cells and Imbalance of Th17 Treg
Z. Wang, S. Fei, H. Chen, Z. Han, L. Sun, J. Tao, X. Ju, M. Zheng, R. Tan, M. Gu
No.300 Guangzhou Road of Nanjing, Nanjing, China
*Purpose: This study was designed to investigate the effect and mechanisms of Iguratimod on circulating DSA and allograft survival in a skin transplant model.*Methods: Mice…
2019 American Transplant Congress
ICOS⁺PD-1⁺ Circulating T Follicular Helper Cells Are a Biomarker of Humoral Alloreactivity and Predict Donor-Specific Antibody Generation Following Transplantation
G. M. La Muraglia II, M. E. Wagener, M. L. Ford, I. R. Badell
Emory Transplant Center, Atlanta, GA
*Purpose: Mounting evidence in kidney transplantation suggests that donor-specific antibodies (DSA) significantly contribute to renal allograft loss. However, biomarkers to guide clinical management of DSA…
2019 American Transplant Congress
The Effects of Anti-BAFF Monoclonal Antibody in the HLA-A2 Sensitized Mouse Model
J. Min¹, H. Lee², B. Kim³, K. Park⁴, K. Doh³, T. Kim⁵, H. Yoon⁶, C. Yang⁷, E. Oh², B. Chung⁷
¹Division of Nephrology, Department of Internal Medicine, Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Bucheon-si, Korea, Republic of, ²Department of Laboratory Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea, Republic of, ³Convergent Research Consortium for Immunologic Disease, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea, Republic of, ⁴Department of Molecular & Cell Biology, Graduate School, College of Medicine, The Catholic University of Korea, Seoul, Korea, Republic of, ⁵Department of Medical Informatics, College of Medicine, The Catholic University of Korea, Seoul, Korea, Republic of, ⁶Division of Nephrology, Department of Internal Medicine, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Incheon, Korea, Republic of, ⁷Division of Nephrology, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea, Republic of
*Purpose: B-cell activating factor (BAFF) is a cytokine that plays a role in the survival, proliferation and differentiation of B-cells. The aim of this study…
2019 American Transplant Congress
B Cell Immunophenotypes in Transplantation
M. Cascalho¹, M. de Mattos-Barbosa², E. A. Farkash³, J. L. Platt²
¹University of Michigan, Ann Arbor, MI, ²Surgery, University of Michigan, Ann Arbor, MI, ³Pathology, University of Michigan, Ann Arbor, MI
*Purpose: B cells and B cell responses have been associated with favorable outcomes of transplantation in some setting and unfavorable outcomes in others. For example,…