Articles tagged "Mixed chimerism"

2019 American Transplant Congress
MHC Cross-Dressing in Mixed Hematopoietic Chimerism
B. Gonzalez Nolasco¹, M. Wang¹, W. Orent¹, A. Prunevieille¹, K. Pruner¹, J. O¹, J. Paster¹, J. C. Madsen², G. Benichou¹
¹Department of Surgery, Center for Transplantation Sciences, Massachusetts General Hospital, Boston, MA, ²Department of Surgery, Center for Transplantation Sciences, Division of Cardiac Surgery, Massachusetts General Hospital, Boston, MA
*Purpose: Achieving specific long-term allograft survival without ongoing immunosuppression is one of the main objectives in transplantation. Mixed hematopoietic chimerism is a strategy that has…
2019 American Transplant Congress
Bcl-2/Bcl-xL Inhibition by Navitoclax vs. Bcl-2 Alone Inhibition by Venetoclax for Induction of Mixed Chimerism in Non-Human Primates
H. Sasaki¹, D. Ma¹, T. Oura¹, A. Dehnadi¹, I. Rosales², B. Cosimi¹, P. Cippa³, T. Fehr³, T. Kawai¹
¹Surgery, Massachusetts General Hospital, Boston, MA, ²Pathology, Massachusetts General Hospital, Boston, MA, ³Medicine, University of Zurich, Zurich, Switzerland
*Purpose: We recently demonstrated that a specific Bcl-2 inhibitor, Venetoclax, can promote mixed chimerism and renal allograft tolerance in non-human primates (NHPs) with reduced myelosuppressive…
2019 American Transplant Congress
Donor-Specific Tregs Prolong Peripheral Chimerism in Baboons Receiving GalTKO hCD47-tg Porcine Peripheral Blood Stem Cells
N. P. Llore¹, J. Stern¹, G. Pierre¹, E. Lopes¹, D. Ekanayake-Alper¹, P. Alonso-Guallart¹, K. Bruestle¹, H. Sakai¹, D. Ayares², M. Lorber², R. Hawley¹, D. H. Sachs¹, M. Sykes¹, A. D. Griesemer¹
¹Columbia Center for Translational Immunology, New York, NY, ²United Therapeutics, Silver Springs, MD
*Purpose: We have previously evaluated the ability of transplantation of polyclonal expanded recipient T regulatory cells to prolong xenogeneic chimerism and skin grafts after transplantation…
2019 American Transplant Congress
Bcl-2 Inhibition with Venetoclax Promotes Induction of Mixed Chimerism and Renal Allograft Tolerance without Severe Myelosuppression in Non-Human Primate
H. Sasaki¹, D. Ma¹, T. Oura¹, A. Dehnadi¹, I. Rosales², B. Cosimi¹, P. Cippa³, T. Fehr³, T. Kawai¹
¹Surgery, Massachusetts General Hospital, Boston, MA, ²Pathology, Massachusetts General Hospital, Boston, MA, ³Medicine, University of Zurich, Zurich, Switzerland
*Purpose: Specific Bcl-2 inhibition has been shown to promote mixed chimerism and skin allograft tolerance without myelosuppressive conditioning in murine models. To extend this approach…
2019 American Transplant Congress
Tolerance Induction with Hematopoietic Stem Cells in Kidney Transplantations
K. Lee, J. Park, Y. Chung, S. Kim
Department of Surgery, Samsung Medical Center, Seoul, Korea, Republic of
*Purpose: Tolerance induction is considered to be the final goal in the field of organ transplantation. We have performed combined bone marrow and kidney transplantation…
2019 American Transplant Congress
Prolongation of Allograft Survival via Donor MHC Chimerism Induced by Exosomes
B. Gonzalez Nolasco¹, M. Wang¹, W. Orent¹, A. Prunevieille¹, J. O¹, K. Ahrens¹, J. C. Madsen², G. Benichou¹
¹Department of Surgery, Center for Transplantation Sciences, Massachusetts General Hospital, Boston, MA, ²Department of Surgery, Center for Transplantation Sciences, Division of Cardiac Surgery, Massachusetts General Hospital, Boston, MA
*Purpose: Achieving robust and durable host immune tolerance of allogeneic transplants is the ultimate goal in clinical transplantation. Mixed chimerism induced via donor bone marrow…
2019 American Transplant Congress
Expansion of Regulatory T and B Cells in Swine Rendered Tolerant of Allogeneic Vascularized Composite Allografts via Mixed Chimerism
G. Saviane¹, A. Lellouch¹, A. Andrews¹, L. Lantieri², M. Randolph¹, G. Benichou¹, C. Cetrulo Jr¹
¹Center for Transplantation Sciences, Division of Plastic Surgery, Boston, MA, USA, Department of Surgery, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA, Boston, MA, ²European Georges Pompidou Hospital, University of Paris, Department of Plastic Surgery, Paris, France
*Purpose: Prevention of acute rejection of vascularized composite allografts (VCAs) requires ongoing systemic immunosuppression, which subject patients to infectious, metabolic, reno-vascular and neoplastic complications. It…
2019 American Transplant Congress
Significantly High FOXP3 mRNA in the Renal Allograft as a Mechanism of Tolerance Induced by Transient Mixed Chimerism in Non-Human Primates
M. Matsunami¹, I. Rosales¹, T. Oura¹, B. Adam², M. Mengel², R. Smith¹, A. Cosimi¹, R. Colvin¹, T. Kawai¹
¹Center for Transplantation Sciences, Massachusetts General Hospital, Harvard Medical School, Boston, MA, ²Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada
*Purpose: Treg-rich organized lymphoid structures (TOLS) has been identified in recipients with renal allograft tolerance induced by transient mixed chimerism in non-human primates (NHPs) and…
2019 American Transplant Congress
After 10 Years: The Results of HLA Mismatched Combined Kidney and Bone Marrow Transplantation for Renal Allograft Tolerance
T. Kawai¹, D. H. Sachs¹, T. Spitzer¹, N. Tolkoff-Rubin¹, R. B. Colvin¹, N. Elias¹, M. Sykes², A. Cosimi¹
¹Massachusetts General Hospital, Boston, MA, ²Columbia University, NYC, NY
*Purpose: Based on decades-long basic studies in animal models, we have applied combined kidney and donor bone marrow transplantation (CKBMT) for induction of allograft tolerance…
2019 American Transplant Congress
Desensitization Using Costimulatory Blockade and Bortezomib Does Not Prevent DSA Formation and Rejection in Reconstructive Transplantation
F. Messner¹, Y. Guo¹, R. Chen², Y. Kuo², G. Brandacher¹, B. Oh¹
¹Department of Plastic and Reconstructive Surgery, Johns Hopkins UJohns Hopkins University School of Medicine, Baltimore, MD, ²Division of Plastic Surgery, Kaohsiung Medical Univerity Hospital, Kaohsiung, Taiwan
*Purpose: Sensitiziation in form of donor-specific antibodies (DSA) and subsequent antibody-mediated rejection (AMR) constitute some of the greatest risk factors for allograft rejection and long-term…