Articles tagged "Tolerance"

2018 American Transplant Congress
Ten Year Follow-Up of Islet Recipients on Anti-LFA1 Therapy: Over-Immunosuppression Leads to Operational Tolerance?
J. Gardner,¹ A. Posselt,¹ S. Wisel,¹ U. Mashirani,² G. Szot,¹ V. Nguyen,¹ K. Johnson,¹ J. McElroy,¹ Q. Tang,¹ P. Stock.¹
¹Surgery, University of California, San Francisco, San Francisco, CA; ²Endocrinology, University of California, San Francisco, San Francisco, CA.
Introduction: Ten-year outcomes from a cohort of five pre-uremic islet transplant (txp) recipients treated with anti-leukocyte functional antigen-1 (LFA-1) antibody Efalizumab (EFA) revealed two patients…
2018 American Transplant Congress
Changes in Phenotype, Immune Suppressive, Function, and Gene Expression of Myeloid Derived Suppressor Cells in Patients Given Combined Kidney and Hematopoietic Cell Transplants in a Tolerance Protocol
K. Jensen,¹ P. Zheng,² J. Xuhuai,² A. Saraswathula,¹ J. Scandling,³ S. Busque,⁴ J. Shizuru,⁵ R. Lowsky,⁵ A. Shori,⁴ H. Maecker,² E. Engleman,¹ E. Meyer,⁵ S. Strober.¹
¹Immunology, Stanford School of Medicine, Stanford, CA; ²Human Immune Monitoring Center, Stanford School of Medicine, Stanford, CA; ³Nephrology, Stanford School of Medicine, Stanford, CA; ⁴Surgery, Stanford School of Medicine, Stanford, CA; ⁵Blood & Marrow Transplantation, Stanford School of Medicine, Stanford, CA.
Tolerance induction after combined organ and hematopoietic cell transplantation can be achieved using conditioning with total lymphoid irradiation (TLI) and anti-thymocyte globulin (ATG), in both…
2018 American Transplant Congress
Acute Murine CMV Infection Results in Loss of Intragraft CD73^HIFR4^HIPD1⁺ CD4 T Cells and Graft Rejection in Previously Tolerant Recipients
A. Dangi,¹ L. Zhang,¹ X. Zhang,² X. Luo.^1,2
¹Division of Nephrology and Hypertension, Department of Medicine, Northwestern University, Chicago, IL; ²Comprehensive Transplant Center, Department of Surgery, Northwestern University, Chicago, IL.
Background: Transplantation tolerance in human recipients has been achieved in recent trials. Nevertheless, the impact of highly prevalent and clinically relevant cytomegalovirus (CMV) infection on…
2018 American Transplant Congress
Ex-Vivo Generation of Alloantigen-Specific Immunomodulatory Cells: Elucidating the Mechanistical Synergy of Cell Components
M. Yao,¹ M. Kumagai-Braesch,¹ M. Watanabe,^1,2 K. Tokodai,¹ T. Lundgren,¹ M. Uhlin,¹ B. Ericzon.¹
¹Department of Transplantation Surgery, Karolinska University Hospital, Stockholm, Sweden; ²Transplantation, Hokkaido University Hospital, Sapporo, Japan.
IntroductionRecently, Todo et al. reported that ex-vivo generated immunomodulatory cells induced operational tolerance in 7/10 liver transplanted recipients. To allow wide spread application, it is…
2018 American Transplant Congress
AMD3100 (Plerixafor) as a Single-Dose Stem Cell Mobilizing Agent in Vascularized Composite Tissue Allograft (VCA) Transplantation in a Canine Model
B. Swearingen,^1,2 S. Graves,^2,3 R. Storb,^2,3 D. Mathes.^1,2
¹Surgery; Division of Plastic and Reconstructive Surgery, University of Colorado School of Medicine, Aurora, CO; ²Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA; ³Medicine, University of Washington Medical Center, Seattle, WA.
PURPOSE:Vascularized Composite Allograft (VCA) transplantation is a clinical reality but limited by chronic immunosuppression and rejection. Current clinical tolerance protocols rely on recipient conditioning and…
2018 American Transplant Congress
Donor Bone Marrow CXCR4+ Foxp3+ Treg Cells Are Essential for Costimulation Blockade-Induced Long-Term Survival of Murine Limb Transplants
L. Wang,¹ Z. Wang,¹ R. Han,¹ G. Ge,¹ L. Levin,² M. Levine,² W. Hancock.^1,2
¹CHOP, Philadelphia; ²UPenn, Philadelphia.
Vascularized composite allotransplantation (VCA) would likely be more widely performed if maintenance immunosuppression was not essential for graft acceptance. Accordingly, we used murine models of…
2018 American Transplant Congress
Engineering Regulatory T Cells with Interleukin (IL-)2 Nanogel for Improved Alloimmune Suppression
S. Eskandari,¹ M. Bandeira Melo,² J. Assaker,¹ A. Mansouri,¹ S. Cai,¹ B. Al Dulaijan,¹ M. Mohamed,¹ D. Irvine,² J. Azzi.¹
¹Transplantation Research Center, Brigham and Women's Hospital, Harvard Medical School, Boston, MA; ²Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA.
Clinical trials of adoptively transferred regulatory T cells (TRegs) have been hindered by the short lifespan of these transferred TRegs. Systemic injection of low-dose interleukin…
2018 American Transplant Congress
Lymph Node Reprogramming: Microparticle Delivery of Immune Signals to Induce Tolerance and Prolong Allograft Survival
Y. Xiong,¹ L. Tostanoski,² C. Jewell,² J. Bromberg.¹
¹UMB, MD; ²UMCP, MD.
Introduction: Microparticle (MP) loaded with peptide antigen plus other immune signals and delivered directly into lymph nodes (LN) can result in either pro-inflammatory or anti-inflammatory…
2018 American Transplant Congress
TGF-b Plus Rapamycin Induce Foxp3 and Promote iTreg Development and Suppressive Function, Leading to Long-Term Allograft Survival
L. Wang, A. Samanta, R. Han, N. Zhou, W. Hancock.
Path & Lab Med, CHOP & UPenn, Philadelphia, PA.
Given the major roadblocks to development of Treg-based cell therapy, pharmacologic approaches to expand endogenous Tregs warrant attention, including approaches with more sustained effects than…
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…