Articles tagged "T cells"

2018 American Transplant Congress
Interferon-b Promotes Regulatory T Cell (Treg) Induction and Prolongs Allograft Survival
M. Fribourg,¹ M. McGinty,² A. Angeletti,² M. Demir,² S. Sealfon,¹ P. Heeger,² P. Cravedi.²
¹Neurology, Icahn School of Medicine at Mount Sinai, New York; ²Medicine, Translational Transplant Research Center, Recanati Miller Transplant Institute, Icahn School of Medicine at Mount Sinai, New York.
Background: Interferon-b (IFNb), a type I interferon with antiviral and pro-inflammatory activity, has been used as an immune modulatory treatment of multiple sclerosis (MS). The…
2018 American Transplant Congress
Effect of Erythropoietin on Cardiac Allograft Survival in Non-Human Primates
J. O.,¹ K. Robinson,¹ W. Sommer,¹ K. Pruner,¹ J. Paster,¹ M. Hanekamp,¹ A. Dehnadi,¹ I. Rosales,¹ R. Smith,¹ P. Cravedi,² P. Heeger,² G. Benichou,¹ J. Madsen.¹
¹MGH, Boston; ²Icahn School of Medicine at Mount Sinai, New York.
Purpose: Tolerance of cardiac allografts has been achieved in cynomolgus monkeys for the first time via mixed hematopoietic chimerism and donor kidney co-transplantation, but the…
2018 American Transplant Congress
Characterization of Mycobacterium Tuberculosis Memory T Cell Subsets in Solid Organ Transplant Recipients with Previously Treated Active Tuberculosis
S. Nellimarla, Y. Natori, V. Ferreira, S. Husain, A. Humar, D. Kumar.
UHN, Toronto, Canada.
Introduction:Cell-mediated immune (CMI) responses including CD4+ and CD8+ T-cells contribute to control of Mycobacterium tuberculosis (MTb) infection. There are no data on long term TB-specific…
2018 American Transplant Congress
The Mark of Zorro: IL35-Coated Exosomes Cross-Dress and Exhaust Recipient T & B Cells during Transplant Tolerance
W. Burlingham,¹ J. Sullivan,¹ D. Lema,¹ Y. Tomita,² Y. Zhou,¹ D. Vignali.³
¹Surgery, University of Wisconsin, Madison, WI; ²Surgery, Tokyo Women's Hospital, Tokyo, Japan; ³Immunology, University of Pittsburgh Medical Center, Pittsburgh, PA.
The folk-hero "Zorro" left his mark on by a sword-slashed "Z". In transplant recipients, rare Tregs also leave a mark on their conventional T &…
2018 American Transplant Congress
A 3C Approach Drives Epigenetic Fixation of Foxp3 Expression and Stabilizes Treg Cell Lineage and Therapeutic Function
X. Xiao, X. Zhang, J. Li, S. Chen, P. Lan, Y. Dou, W. Chen, X. Li.
Immunobiology & Transplant Research Center, Houston Methodist Hospital, Houston, TX.
The instability of the regulatory T (Treg) cell lineage precludes their therapeutic potential in transplantation and autoimmune diseases. Herein, we invented a novel approach to…
2018 American Transplant Congress
In Vitro α-Galactosylceramide Stimulation Expands CD4⁺CD25⁺Foxp3⁻ Regulatory T Cell Precursors in Murine Thymocytes
H. Katsumata,^1,2 M. Ikemiyagi,¹ T. Kanzawa,¹ H. Fukuda,¹ R. Ishii,¹ K. Saiga,^1,3 M. Okumi,¹ Y. Ishii,⁴ K. Tanabe.¹
¹Urology, Tokyo Women's Medical University, Tokyo, Japan; ²Division of Nephrology and Hypertension, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan; ³Urology, Jyoban Hospital of Tokiwa Foundation, Fukushima, Japan; ⁴Laboratory for Immunotherapy, Center for Integrative Medical Sciences (IMS) RIKEN, Yokohama, Japan.
Background: We previously established mixed chimerism after invariant natural killer T-cell stimulation by administration of liposomal α-galactosylceramide (lipo-αGC) and costimulatory blockade, leading to regulatory T…
2018 American Transplant Congress
TACI Polymorphisms Associated with Allograft Rejection in Mice and in Man
M. Barbosa,¹ E. Farkash,² J. Platt,³ M. Cascalho.³
¹Surgery, University of Michigan, Ann Arbor, MI; ²Pathology, University of Michigan, Ann Arbor, MI; ³Surgery/Microbiology and Immunology, University of Michigan, Ann Arbor, MI.
Trans-membrane Activator and CAML Interactor (TACI) controls B cell differentiation and memory and exists as numerous allelic variants in healthy individuals. In fact, TACI is…
2018 American Transplant Congress
C5aR Regulates Myeloid Derived Suppressor Cells (MDSCs) in Transplantation
I. Llaudo, J. Ochando, P. Heeger.
Medicine, Icahn School of Medicine at Mount Sinai, New York, NY.
Prolonged survival of anti-CD154-(MR1)-treated murine heart transplant recipients is dependent on regulatory T cells (Treg) and MDSC. Based on studies in the tumor literature suggesting…
2018 American Transplant Congress
Mechanisms of DEPTOR Function in CD4⁺ T Cell Subsets
J. Wedel,¹ K. Liu,¹ P. Sage,² M. Laplante,³ D. Briscoe.¹
¹Transplant Research Program, Boston Children's Hospital, Harvard Medical School, Boston; ²Department of Microbiology and Immunobiology, Harvard Medical School, Boston; ³IUCP, Lavel University, Quebec, Canada.
We have previously observed that the cell intrinsic modulatory protein DEPTOR (DEP) stabilizes Foxp3 expression, enhances Treg function and inhibits Treg dedifferentiation. In vivo, sustained…
2018 American Transplant Congress
Donor T Cells Undermine the Graft-Protective Effect of DST Plus Anti-CD154
M. Iglesias, M. Chicco, W. Lee, G. Brandacher, G. Raimondi.
Plastic Surgery, Johns Hopkins University, Baltimore, MD.
Costimulation blockade (CoB) regimens are a promising immunomodulatory strategy to prevent transplant rejection. However, their efficacy is affected by multiple factors, including still unknown ones.…