Articles tagged "T cells"

2020 American Transplant Congress
Next Generation Sequencing Based Analysis of the T-Cell Receptor Repertoire Reveals an Increase of Alloreactive T-Cell Clones after Kidney Transplantation
C. Aschauer¹, K. Jelencsics¹, K. Hu¹, R. Reindl-Schwaighofer¹, J. Vetter², A. Heinzel¹, A. Kainz¹, G. Gualdoni¹, S. Schaller², S. Winkler², R. Oberbauer¹
¹Department of Medicine III - Division of Nephrology and Dialysis, Medical University of Vienna, Vienna, Austria, ²Bioinformatics Research Group, University of Applied Sciences Upper Austria, Hagenberg im Muehlkreis, Austria
*Purpose: The development of the alloreactive T-cell repertoire after kidney transplantation (KTX) is not yet fully understood. The combination of mixed lymphocyte reaction (MLR) and…
2020 American Transplant Congress
Treg Stability Depends on Lymphotoxin Beta Receptor-Driven Migration
V. Saxena, W. Piao, L. Li, Y. Xiong, C. Palusckievicz, T. Simon, M. Shirkey, R. Abdi, J. S. Bromberg
University of Maryland, Baltimore, Baltimore, MD
*Purpose: Regulatory T cell (Treg) suppressor function for allograft survival requires maintenance of transcription factor Foxp3 and sequential migration from tissues to lymph nodes (LN).…
2020 American Transplant Congress
Treg Lymphotoxin Signals Promote Cancer Metastatic Migration: Mechanisms for Treg-Cancer Interaction
W. Piao¹, R. Oakes², C. Paluskievicz¹, Y. Xiong¹, L. Li¹, V. Saxena¹, M. WillsonShirkey¹, C. Jewell², J. Bromberg¹
¹Surgery, U of Maryland, Baltimore, MD, ²U of Maryland, College Park, MD
*Purpose: Immune suppressive therapy can be complicated by malignancy. Regulatory T cells (Treg) control immune tolerance for graft survival but cause to immune suppression in…
2020 American Transplant Congress
Stability of Immune Phenotype, Alloreactive, and Antiviral Immunity after Switch to Belatacept-Based Regimen after Kidney Transplantation
J. Schaenman, M. Rossetti, H. Wilhalme, V. Groysberg, G. Sunga, J. Gadzhyan, B. Abdalla, E. Lum, P. Pham, G. Danovitch, J. Veale, H. A. Gritsch, D. Elashoff, E. Reed, S. Bunnapradist
David Geffen School of Medicine at UCLA, Los Angeles, CA
*Purpose: This investigator-initiated study examines the impact of belatacept on T cell immune phenotype and function.*Methods: 19 patients with evidence of calcineurin inhibitor (CNI) toxicity…
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…