Articles tagged "T cells"

2020 American Transplant Congress
Eosinophils Maintain Lung Allograft Tolerance by Sequestering CD8+ T Cells in Bronchial Associated Lymphoid Tissue
Z. Mei¹, Y. Guo¹, A. Hata¹, A. Banerjee¹, D. Li¹, A. Manafi¹, B. Mahgoub¹, D. Kreisel², A. Gelman², A. S. Krupnick¹
¹Department of Surgery, University of Virginia, Charlottesville, VA, ²Department of Surgery, Washington University in St. Louis, St. Louis, MO
*Purpose: It has been recently described that eosinophils can facilitate immunosuppression-mediated acceptance of murine lung allografts. But the role of eosinophils in long term maintenance…
2020 American Transplant Congress
The Fibrinogen-Like Protein 2 Molecule Influences the Development of Thymic Regulatory T-Cells
C. Lam¹, S. Moshkelgosha¹, G. A. Levy², A. Chruscinski³, S. C. Juvet⁴
¹Latner Thoracic Surgery Research Laboratories, University Health Network, Toronto, ON, Canada, ²Multi Organ Transplant Program, University Health Network, Toronto, ON, Canada, ³Toronto General Hospital Research Institute (TGHRI), University Health Network, Toronto, ON, Canada, ⁴Toronto General Hospital Research Institute, University Health Network, Toronto, ON, Canada
*Purpose: Transplantation is the primary treatment for patients with end-stage organ failure. However, long-term outcomes are limited by immunosuppressant toxicities and chronic graft rejection. Identifying…
2020 American Transplant Congress
Tracking Tregs in a Non-Human Primate Model with Expanded Autologous Treg Infusions In Vivo
K. Bruestle¹, B. Piegari¹, H. Sakai¹, F. Fredriksson¹, D. Ekanayake-Alper¹, S. Robertson², D. Hajosi², J. Weiner¹, A. Iuga³, S. M. Coley³, M. Sykes¹, A. Griesemer¹
¹Columbia Center for Translational Immunology, Columbia University, New York City, NY, ²Institute for Comparative Medicine, Columbia University, New York City, NY, ³Department of Pathology and Cell Biology, Columbia University, New York City, NY
*Purpose: Regulatory Tcell (Treg) therapy is a promising tool for tolerance induction in solid organ transplantation. Despite encouraging results in humans and monkeys, questions about…
2020 American Transplant Congress
Flow Cytometric Characterization of Regulatory Cell Populations Expanded Ex Vivo from PBMCs of Kidney Transplant Recipients
S. Tripathi¹, P. L. Martin-Moreno², G. J. Kavalam¹, A. Chandraker¹
¹Renal, Brigham and Women's Hospital, Boston, MA, ²Nephrology, Clinica Universidad de Navarra, Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain
*Purpose: We have previously shown that it is possible to generate alloantigen-specific regulatory T cell lines and clones that prolong allograft survival upon infusion in…
2020 American Transplant Congress
Early Post-Transplant Infusion of Ex Vivo-Expanded Autologous Polyclonal Regulatory T Cells (Treg) Prolongs Kidney Allograft Survival in Non-Lymphodepleted, CTLA4Ig-Treated Rhesus Monkeys
K. Sasaki, Y. Wang, R. Nakano, L. Lu, J. Hughes, V. Vujevich, A. J. Ganoza, M. Wijkstrom, A. Humar, A. W. Thomson, M. B. Ezzelarab
Starzl Transplantation Institute, University of Pittsburgh School of Medicine, Pittsburgh, PA
*Purpose: Rodent studies have demonstrated the utility of regulatory T cell (Treg) infusion for the promotion of tolerance to organ allografts. Here, we evaluated the…
2020 American Transplant Congress
The Gut Microbiota Stimulates Dendritic Cells for Immune Modulation
V. Saxena, W. Piao, L. Hittle, L. Li, T. Simon, C. Palusckievicz, Y. Xiong, T. Zhang, M. Shirkey, E. F. Mongodin, J. S. Bromberg
University of Maryland, Baltimore, Baltimore, MD
*Purpose: The gut microbiota is a driving force in host immune regulation, and thus a potential target for intervention and drug development. We previously showed…
2020 American Transplant Congress
Intra-Lymph Node Injection of Microparticles Reprograms the Laminin Stromal Network to Prolong Allograft Survival
C. M. Paluskievicz¹, Y. Xiong¹, W. Piao¹, M. Willson-Shirkey¹, H. Eppler², C. M. Jewell², J. S. Bromberg¹
¹U Maryland, Baltimore, MD, Baltimore, MD, ²U Maryland, College Park, MD, College Park, MD
*Purpose: Microparticles (MPs) carrying peptide antigen with immune signals can be directly delivered to lymph nodes (LNs) to induce pro-inflammatory or anti-inflammatory responses. We hypothesized…
2020 American Transplant Congress
Antibody-Suppressor CD8⁺ T Cells Ameliorate Antibody-Mediated Rejection Following Kidney Transplant in Mice
J. M. Zimmerer¹, J. L. Han¹, Q. Zeng², B. A. Ringwald¹, C. Cassol¹, R. Warren¹, M. Abdel-Rasoul¹, C. K. Breuer², G. L. Bumgardner¹
¹Ohio State University, Columbus, OH, ²Nationwide Children's Hospital, Columbus, OH
*Purpose: We previously reported the novel alloantibody suppressor activity of alloprimed CXCR5+IFN-γ+CD8+ T cells following hepatocellular transplant in mice. We utilized a murine kidney transplant…
2020 American Transplant Congress
Effect of Low vs Standard Dosage of Anti-Thymocyte Globulin Induction Therapy on the Co-Inducible Molecules (Cd28, CTLA-4, ICOS, PD-1) Expression Pattern in T Regulatory Cell
G. Queipo¹, A. Hernandez-Mendoza¹, M. Estrada-Matus², M. Fonseca-Sanchez¹, F. Oviedo¹, L. García-Cobarruvias³, J. Prieto Chávez⁴, L. Pizarro⁵, L. Morales-Buenrostro⁶
¹Human Genetics, Hospital General de Mexico-Eduardo Liceaga Facultad de Medicina UNAM, Mexico City, Mexico, ²Nephrology, Instituno Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico, ³Transplant Unit, Hospital General de Mexico-Eduardo Liceaga, Mexico City, Mexico, ⁴Flow Cytometry Core, Mexican Social Security Institute, Mexico City, Mexico, ⁵Unit on Immunochemistry, Medical Research, Specialties Hospital of the National Medical Centre “SigloXXI”, Mexico City, Mexico, ⁶Nephrology, Instituto Nacional de Ciencias Medicas y Nutrición Salvador Zubirán, Mexico City, Mexico
*Purpose: Two thymoglobulin (TG) dosages effect on the Tregulatory cell (Treg) and describe the behavior of the co-stimulatory pathways in terms of FIM and gene…
2019 American Transplant Congress
High Numbers of Differentiated CD8⁺CD28^– T Cells Are Associated with a Substantially Lowered Risk for Late Rejection and Graft Loss after Kidney Transplantation
M. G. Betjes, A. Langerak, M. Klepper, N. Litjens
Nephrology & Transplantation, Erasmus MC, Rotterdam, Netherlands
*Purpose: Recipients of a kidney transplant have a prematurely aged T-cell system. This is reflected in lowered thymic output, reduced telomere length and more highly…