Articles tagged "T cells"

2019 American Transplant Congress
Natural Anti-a Antibody Production In Mice Is Cd4 T Cell-independent
I. Adam¹, B. Motyka², L. West³
¹Medical Microbiology & Immunology, University of Alberta, Edmonton, AB, Canada, ²Pediatrics, University of Alberta, Edmonton, AB, Canada, ³Pediatrics, Surgery, Immunology, Lab Medicine & Canadian Donation and Transplant Research Program, University of Alberta, Edmonton, AB, Canada
*Purpose: ABO-incompatible organ transplants (ABOi-Tx) are at high risk of rapid rejection mediated by preformed ABO antibodies (Ab) except during infancy when they are absent.…
2019 American Transplant Congress
Sphingosine 1-Phosphate Receptors and CCR7 Sequentially Coordinate T Cell Migration
Y. Xiong¹, W. Piao¹, C. Brinkman¹, J. Kulinski², A. Olivera², A. Cartier³, T. Hla⁴, K. Hippen⁵, B. Blazar⁵, S. Schwab⁶, J. Bromberg¹
¹Surgery, UMB, Baltimore, MD, ²NIH, Bethesda, MD, ³Boston Children's hospital, Boston, MA, ⁴Boston Children's hospital, Boston, MD, ⁵U.Minnesota, Minneapolis, MN, ⁶NYU, NY, NY
*Purpose: CCR7 plays critical roles in T cell migration to CCL21 across lymphatic endothelial cells from tissues to lymph nodes (LN). S1PR1 and S1PR4 are…
2019 American Transplant Congress
Ablation of Interferon Regulatory Factor 4 in T Cells Induces “Memory” of Transplant Tolerance That is Irreversible by Immune Checkpoint Blockade
H. Zhang¹, J. Wu², D. Zou³, W. Chen³
¹The second Xiangya Hospital, Changsha, China, ²Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China, ³Immunobiology & Transplant Science Center, Houston Methodist Research Institute, Houston, TX
*Purpose: Achieving alloantigen-specific transplant tolerance through ablation of interferon regulatory factor 4 in T cells*Methods: 1. Irf4fl/flCD4-Cre recipients were first transplanted with BALB/c hearts and…
2019 American Transplant Congress
Impact of Early Borderline Histological Changes on Subsequent Events in Renal Transplant Recipients
R. Mehta, S. Tandukar, D. Jorgensen, I. Owoyemi, N. Shah, C. Puttarajappa, C. Wu, S. Hariharan
University of Pittsburgh Medical Center, Pittsburgh, PA
*Purpose: The significance of borderline changes suspicious for rejection noted on early renal allograft biopsies on subsequent events in renal transplant recipients is unclear.*Methods: Between…
2019 American Transplant Congress
IL-1β and IL-6 Facilitate T Cell Reconstitution in Heart Allograft Recipients Treated with Anti-Thymocyte Globulin
S. Hasgur, R. Fan, A. Valujskikh
Inflammation and Immunity, Cleveland Clinic, Cleveland, OH
*Purpose: Antibody-mediated lymphocyte depletion is used in solid organ and stem cell transplantation. However, T cell reconstitution after lymphoablation may lead to acute rejection and…
2019 American Transplant Congress
Thymoglobulin Induction with Tacrolimus and Everolimus Maintenance Therapy in Elderly Kidney Transplantation Results in Prolonged Lymphocyte Depletion and Do Not Favor Regulatory Profile
E. David-Neto¹, G. Ramos de Freitas¹, M. Fernandes¹, F. Agena¹, F. Brambate Carvalhinho Lemos¹, F. Jota de Paula¹, V. Coelho², N. Zocoler Galante¹
¹Renal Transplantation Service, Hospital das Clínicas - University of São Paulo School of Medicine, Sao Paulo, Brazil, ²Laboratory of Immunology – LIM 19, Heart Institute - University of São Paulo School of Medicine, Sao Paulo, Brazil
*Purpose: Despite the growing number of elderly kidney transplant (Ktx) recipientes few studies describe the effects of immunosuppression on this group. We evaluated the immunological…
2019 American Transplant Congress
The Effects of Chronic Kidney Disease on Antiviral T Cell Response
R. L. Crepeau¹, H. Li², L. P. Daley-Bauer³, M. L. Ford¹, P. D. Winterberg²
¹Emory Transplant Center, Atlanta, GA, ²Pediatrics, Emory University School of Medicine, Atlanta, GA, ³Microbiology & Immunology, Emory University School of Medicine, Atlanta, GA
*Purpose: Accumulation of memory T cells bearing markers of sustained antigen stimulation have been described in patients with chronic kidney disease (CKD). Cytomegalovirus (CMV) establishes…
2019 American Transplant Congress
Mass Cytometry-Based Characterization of Adaptive Immunity in Transplant Recipients with Self-Limiting or Chronic EBV Viremia
V. H. Ferreira¹, C. J. Guidos², A. Humar¹, D. Kumar¹
¹UHN, Toronto, ON, Canada, ²SickKids Research Inst, Toronto, ON, Canada
*Purpose: SOT recipients are at high risk for EBV-associated PTLD. EBV viremia is a risk factor for PTLD. In some patients viremia is self-limited while…
2019 American Transplant Congress
Evolution of HHV6- and CMV-Specific T Cell Functional Responses and Immune Cell Populations after Kidney Transplant
A. Gil¹, M. Co², M. Calvo-Calle¹, J. Cruz¹, L. Stern¹, L. Gibson²
¹Pathology, University of Massachusetts Medical School, Worcester, MA, ²Medicine, University of Massachusetts Medical School, Worcester, MA
*Purpose: Human herpesvirus (HHV)-6 reactivation after solid organ or hematopoietic stem cell transplant has been associated with complications such as graft rejection and all-cause mortality.…
2019 American Transplant Congress
TACI Polymorphisms Associated with Increased Alloimmunity and Allograft Rejection
M. Garcia de Mattos-Barbosa¹, E. A. Farkash², J. L. Platt¹, M. Cascalho¹
¹Transplant Surgery, University of Michigan, Ann Arbor, MI, ²Pathology, University of Michigan, Ann Arbor, MI
*Purpose: Transmembrane activator and CAML interactor (TACI) controls B cell differentiation. The TACI gene is highly polymorphic (>95% of all genes) and frequently variants exhibit…