Articles tagged "Tolerance"

2018 American Transplant Congress
RNA Expression Profiling of Renal Allografts in the Cynomolgus Monkey Identifies Tolerance
R. Smith,¹ M. Matsunami,³ B. Adam,² A. Rosales,¹ T. Oura,³ A. Cosimi,³ T. Kawai,³ M. Mengel,² R. Colvin.¹
¹Pathology, Massachusetts General Hospital, Boston, MA; ²Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada; ³Department of Surgery, Massachusetts General Hospital, Boston, MA.
IntroductionTolerance induction is a long standing clinical goal. However, identification remains elusive. Here we profile intra-renal allograft RNA expression in a mixed chimerism renal allograft…
2018 American Transplant Congress
Human CD8⁺CD28^– Ts Cells Expanded by Common Gamma Chain (γc) Cytokines Keep Steady Allospecific Suppressive Capacity In Vivo
G. Liu,¹ F. Feng,¹ P. Zhu,¹ J. Liu,² Y. Liu,¹ Y. Yu.²
¹Department of Immunology, School of Basic Medical Science, Southern Medical University, Guangzhou, Guangdong, China; ²Department of Urology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, China.
Background: CD8+CD28- T suppressor (Ts) cells were recently reported to play a critical role in transplant tolerance, harnessing the potential for clinical use in transplantation.…
2018 American Transplant Congress
Heart En Bloc Thymus Cotransplantation in NHPs Controls Cellular but Not Humoral Alloreactivity
W. Sommer, J. O., K. Pruner, J. Paster, M. Hanekamp, A. Dehnadi, I. Rosales, R. Smith, R. Colvin, G. Benichou, J. Allan, J. Madsen.
Massachusetts General Hospital, Boston.
Background: We have achieved tolerance of cardiac allografts in Cynomolgus monkeys for the first time by using a mixed chimerism-based conditioning protocol and by co-transplanting…
2018 American Transplant Congress
Loss of HIF-1α in CD4 T Cell Improve Outcome of Mouse Vascularized Osteomyocutaneous Allotransplantation under Costimulation Blockade
C-.H. Lin,^1,2 M. Anggelia,^1,2 H. Yang,³ W. Chuang,⁴ H. Cheng,¹ F-.C. Wei,^1,2 G. Brandacher.⁵
¹PRS, Center for VCA, Chang Gung Memorial Hospital, Taoyuan, Taiwan; ²Chang Gung Medical College and Chang Gung University, Taoyuan, Taiwan; ³Nephrology, Chang Gung Memorial Hospital, Taoyuan, Taiwan; ⁴Pathology, Chang Gung Memorial Hospital, Taoyuan, Taiwan; ⁵PRS, Johns Hopkins University School of Medicine, Baltimore, MD.
Background: Allograft survival depends on the balance of effector T cells (Teff) and regulatory T cells (Tregs). Previous study suggested that the balance is controlled…
2018 American Transplant Congress
Increased Expression of CEACAM1 is Cytoprotective during Ischemia-Reperfusion Injury in Human Orthotopic Liver Transplantation
R. Sosa,¹ J. Nevarez-Mejia,¹ M. Rossetti,¹ A. Zarrinpar,² F. Kaldas,² C. Lassman,¹ B. Naini,¹ N. Datta,² R. Busuttil,² D. Gjertson,¹ J. Kupiec-Weglinski,² E. Reed.¹
¹Pathology and Laboratory Medicine, University of California, Los Angeles, Los Angeles, CA; ²Surgery, University of California, Los Angeles, Los Angeles, CA.
Background T cell exhaustion has recently been proposed as an alternative mechanism to prevent memory development and tissue damage arising during ischemia-reperfusion injury (IRI) in…
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
Relationship between Mixed Chimerism and Acceptance of HLA-Matched and Mismatched Kidney Transplants after Withdrawal of Immunosuppressive Drugs
J. Scandling, S. Busque, R. Lowsky, J. Shizuru, K. Jensen, A. Shori, E. Engleman, E. Meyer, R. Hoppe, S. Strober.
Stanford University, Stanford, CA.
Classical studies in cattle and rodents showed that mixed chimerism (MXC) established in fetuses and neonates was permanent, linked to immune tolerance and graft acceptance…
2018 American Transplant Congress
Type-1 Interferon Impairs the Immunoregulatory Activity of IL-10: Understanding the Mechanisms of Abrogation of Transplant Tolerance
M. Iglesias, A. Arun, M. Chicco, B. Lam, V. Ivanova, W. Lee, G. Brandacher, G. Raimondi.
Plastic Surgery, Johns Hopkins UIniversity, Baltimore, MD.
A growing body of evidence shows that induction of long term transplant survival by costimulation blockade (CoB) regimens is impaired by inflammatory responses (e.g. engagement…
2018 American Transplant Congress
Thymus Co-Transplantation Promotes Donor-Specific Tolerance in Allogeneic Heart Transplantation
J. Kwun,¹ J. Li,² C. Rouse,³ J. Park,¹ A. Kirk,¹ L. Markert.²
¹Surgery, Duke University, Durham, NC; ²Pediatrics, Duke University, Durham, NC; ³Laboratory Animal Resources, Duke University, Durham, NC.
Background: Allogeneic thymus has been investigated to achieve donor-specific tolerance in organ transplantation. Often thymus co-transplantation induces long-term graft survival in immunodeficient and total lymphoid…
2018 American Transplant Congress
Low Intensity Conditioning Protocol for Inducing Chimerism-Based Tolerance in Non-Obese Diabetic Mice
A. Chhabra, Y. Huang, H. Xu, A. Merchak, S. Ildstad.
Institute for Cellular Therapeutics, University of Louisville, Louisville, KY.
Type 1 diabetes is the most common chronic disease affecting children. Islet cell or pancreas transplantation offer the most physiologic approach to glucose homostasis. However…