Articles tagged "Tolerance"

2018 American Transplant Congress
An Open-Label Proof-of-Principle Phase 2a Study to Evaluate Autologous Hematopoietic Stem Cell Transplantation for Allogeneic Organ Transplant Tolerance (ASCOTT)
A. Chruscinski,¹ H. Atkins,² M. Macarthur,¹ C. Anne Marie,² D. Grant,¹ C. Bredsen,² E. Renner,¹ L. Lilly,¹ N. Selzner,¹ O. Adeyi,¹ R. Smith,¹ S. Moshkelgosha,¹ A. Humar,¹ S. Juvet,¹ G. Levy.¹
¹Multi-Organ Transplant Program, University Health Network, Toronto, ON, Canada; ²Ottawa Hospital Research Institute, The Ottawa Hospital, Ottawa, ON, Canada.
Background: Long-term survival of recipients of solid organ transplants is hampered by chronic rejection, disease recurrence and immunosuppression-induced toxicity. Self-tolerance is re-established after autologous hematopoietic…
2018 American Transplant Congress
Alloreactive B Cells Acquire Cell-Intrinsic Hyporesponsiveness in Tolerant Recipients
S. Khiew,¹ D. Jain,¹ J. Young,¹ J. Chen,¹ J. Yang,¹ Q. Wang,¹ D. Yin,¹ R. Sciammas,² A. Chong.¹
¹Department of Surgery, The University of Chicago, Chicago, IL; ²Comparative Medicine, University of California, Davis, CA.
Donor-specific transplantation tolerance has long been an aspiration of clinical transplantation. Recently, we have reported that multiple mechanisms are required to reinforce profound hyporesponsiveness of…
2018 American Transplant Congress
Immunity and Tolerance after Bilateral Orthotopic Lung Transplant (BOLT) in Tandem with a CD3+/CD19+ Depleted Vertebral Bone Marrow Transplant (BOLT+BMT) from 1 of 8 HLA-Matched Cadaveric Donors
P. Szabolcs,¹ X. Chen,¹ A. Donnenberg,² M. Hill,¹ J. Rowan,¹ S. Mcintyre,¹ G. Kurland,¹ J. Barnum,¹ J. McDyer.¹
¹BMT-CT, Children Hospital of Pittsburgh UPMC, Pittsburgh, PA; ²IDM-HCC, University of Pittsburgh, Pittsburgh, PA.
Primary immunodeficiency patients may develop pulmonary complications and most are ineligible for either lung transplant or BMT due to futility. We report our first 2…
2018 American Transplant Congress
LAG-3 Deletion Upregulates Memory in a Dendritic Cell-Dependent Process
S. Gibney,¹ M. Efre,¹ T. Ashry,¹ C. Yang,¹ T. O'Shea,^1,2 R. White,² P. Russell,¹ J. Madsen,¹ R. Colvin,² A. Alessandrini.^1,2
¹Center for Transplantation Sciences, Department of Surgery, Massachusetts General Hospital, Boston, MA; ²Department of Pathology, Massachusetts General Hospital, Boston, MA.
Introduction. Cardiac transplantation is critical for management of severe heart failure, but cardiac allografts frequently undergo chronic T-cell-mediated allograft rejection. Our research demonstrates that Lymphocyte…
2018 American Transplant Congress
Tipping the “Immune Balance” towards Tolerance by Specific and Systematic Depletion of Donor and Host Effector Cells
R. Bascom, K. Tao, L. West.
Alberta Transplant Institute, Canadian National Transplant Research Program, University of Alberta, Edmonton, Canada.
Purpose: To induce robust transplant tolerance in neonates with fully allogeneic spleen and bone marrow cells (SC/BMC) it is crucial to define the complex interplay…
2018 American Transplant Congress
Human Endothelial-Like Cells Transdifferentiated from Peripheral CD14⁺ Monocytes Inhibit T Cells in Response to Allo-Stimulation
Y. Tanaka, H. Ohdan.
Gastroenterological and Transplant Surgery, Hiroshima University, Hiroshima, Japan.
We have previously demonstrated that the endothelial cells located in immune-privilege sites, such as livers, suppress T-cells in response to both of direct and indirect…
2018 American Transplant Congress
Acquired Resistance to Transplantation Tolerance as a Result of Prior Pregnancy Requires B Cells
A. Suah,¹ S. Khiew,¹ J. Young,¹ D. Yin,¹ Q. Wang,¹ M. Alegre,² A. Chong.¹
¹Surgery, Univeristy of Chicago Medicine, Chicago, IL; ²Medicine, University of Chicago, Chicago, IL.
Introduction: Clinical data suggest allogeneic pregnancy is a sensitizing event; yet, recent data from mouse models indicates it induces fetal-specific regulatory T cell (Treg) expansion…
2018 American Transplant Congress
Long Term Histologic Allograft Health is Preserved Despite Rejection during Protocolized Immunosuppression Withdrawal (ISW) in Stable Pediatric Liver Transplant Recipients
V. Venkat,¹ J. Bucuvalas,² M. Martinez,³ K. Spain,⁴ G. Mazariegos,¹ A. Demetris,⁵ S. Feng.⁶
¹Children's Hospital, Pittsburgh; ²CCHMC, Cincinnati; ³Columbia, NY; ⁴Rho, Chapel Hill; ⁵UPMC, Pittsburgh; ⁶UCSF, San Francisco.
Background: Long term allograft health after rejection during ISW has not been previously assessed. We compare baseline and 4yr graft histology of 20 rejectors in…
2018 American Transplant Congress
Myeloid Derived Suppressor Cells Are Induced after Transplantation and Home to the Transplanted Kidney
Y. Lee, E. Davila, J. Bromberg, J. Scalea.
Surgery and Immunology, University of Maryland, Baltimore, MD.
BACKGROUND: Myeloid-derived suppressor cells (MDSCs) are a naturally occurring, heterogeneous population of highly immunosuppressive cells which expand in response to inflammatory conditions such as cancer.…
2018 American Transplant Congress
Organ-Specific Differences in a Thymoglobulin and Belatacept-Based Protocol for Tolerance Induction in Non-Human Primates
W. Sommer, J. O., K. Robinson, A. Dehnadi, M. Hanekamp, I. Rosales, K. Pruner, R. Smith, R. Colvin, T. Kawai, G. Benichou, J. Madsen, J. Allan.
Massachusetts General Hospital, Boston.
In non-human primate lung transplantation, allograft acceptance has been achieved using a delayed mixed-chimerism approach consisting of 4 months of triple-drug immunosuppression followed by donor…