Articles tagged "Primates"

2020 American Transplant Congress
Expression of Multiple Human Complement Regulatory Proteins Results in Prolonged Heterotopic Xenoheart Survival in an NHP Model
K. Ahrens¹, J. M. O¹, W. Sommer², D. Becerra¹, P. M. Patel¹, A. Dehnadi¹, Y. Kan³, J. Layer³, J. Morrissette¹, T. Costa¹, I. M. Hanekamp¹, J. S. Allan⁴, M. Youd³, R. N. Pierson⁵, W. Qin³, L. Burdorf⁵, A. M. Azimzadeh¹, W. Westlin³, L. Yang³, J. C. Madsen⁵
¹Center for Transplantation Sciences, Massachusetts General Hospital, Boston, MA, ²Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany, ³eGenesis Inc., Cambridge, MA, ⁴Center for Transplantation Sciences, Division of Thoracic Surgery, Massachusetts General Hospital, Boston, MA, ⁵Center for Transplantation Sciences, Division of Cardiac Surgery, Massachusetts General Hospital, Boston, MA
*Purpose: Advances in genome engineering technology allow for multiplex genetic modifications in pigs designed to address immunologic and coagulation incompatibilities in order to facilitate xenotransplantation.…
2020 American Transplant Congress
Pig-To-Baboon Liver Xenotransplantation Utilizing Genetically Modified Swine
D. Detelich¹, C. G. Rickert¹, T. M. Coe¹, S. Kimura¹, I. Rosales¹, H. Deng¹, H. Yeh¹, W. Qin², Y. Kan², J. Layer², M. Youd², W. Westlin², L. Yang², J. F. Markmann¹
¹Massachusetts General Hospital, Boston, MA, ²eGenesis, Cambridge, MA
*Purpose: Pig-to-baboon liver xenotransplant (LXT) continues with significant hurdles, including thrombocytopenia, coagulation dysregulation and rejection with the longest reported survival of 29 days utilizing a…
2020 American Transplant Congress
Successful Long-Term TMA- and Rejection- Free Survival of a Kidney Xenograft with Triple Xenoantigen Knockout Plus Insertion of Multiple Human Transgenes
D. H. Ma¹, H. Sasaki¹, T. Hirose¹, I. Rosales¹, A. Dehnadi¹, R. Colvin¹, J. F. Markmann¹, W. Win², Y. Kan², J. Layer², M. Youd², W. Westlin², L. Yang², T. Kawai¹
¹Surgery, MGH, Boston, MA, ²eGenesis Inc., Cambridge, MA
*Purpose: Recent advances in genome engineering technology allow for the generation of porcine organ donors with multiplex gene edits. Here we evaluated survival of kidneys…
2020 American Transplant Congress
The Effect of Human Thrombomodulin on Thrombotic Complications in Life Supporting Pig-to-Baboon Cardiac Xenotransplantation
C. E. Goerlich¹, A. Singh¹, D. Kaczorowski¹, M. Abdullah¹, B. Lewis¹, I. Tatarov¹, A. Hershfeld¹, T. Zhang¹, P. Odonkor¹, E. Strauss¹, B. Williams¹, D. Ayares², M. Mohiuddin¹
¹Surgery, University of Maryland School of Medicine, Baltimore, MD, ²Revivicor, Blacksburg, VA
*Purpose: Transplantation of organs from animals to humans (xenotransplantation) has been proposed to address the critical shortage of organs for transplantation. The use of genetically…
2020 American Transplant Congress
Human, Monkey Transplant Tolerance and IL35 “Exokine
W. J. Burlingham¹, E. Jankowska-Gan², D. Lema², J. H. Fechner², J. A. Sullivan², D. B. Kaufman²
¹University of Wisconsin, Madison, WI, ²Surgery, University of Wisconsin, Madison, WI
*Purpose: Studies in B6 (H2b) mice tolerized to CBA (H2k) have shown that induced allospecific Tregs make 2 very different forms of immunoregulatory cytokines: 1)…
2020 American Transplant Congress
Establishing an Induction Protocol for Long-Term Multilineage Mixed Chimerism in Rhesus Macaques
K. Bruestle¹, H. Sakai¹, F. Fredriksson¹, B. Piegari¹, D. Ekanayake-Alper¹, A. McLuckie², R. Ober², J. Weiner¹, A. Iuga³, S. M. Coley³, M. Sykes¹, A. Griesemer¹
¹Columbia Center for Translational Immunology, Columbia University, New York City, NY, ²Institute for Comparative Medicine, Columbia University, New York City, NY, ³Department of Pathology and Cell Biology, Columbia University, New York City, NY
*Purpose: Mixed chimerism (MC) induction via non-myeloablative conditioning and bone marrow transplantation (BMT) induces tolerance to solid organs. Our standard MC induction protocol in cynomologous…
2020 American Transplant Congress
Granulocyte-Colony Stimulating Factor (G-CSF) and Granulocyte-Macrophage CSF (GM-CSF) Administration Enriches for Highly Suppressive CD4⁺CD45RA^–Foxp3^hi Cells in Leukapheresis Products of Rhesus Monkeys
K. Sasaki, Y. Wang, L. Lu, J. Hughes, V. Vujevich, A. W. Thomson, M. B. Ezzelarab
Starzl Transplantation Institute, University of Pittsburgh School of Medicine, Pittsburgh, PA
*Purpose: In humans, CD4+CD45RA-Foxp3hi T cells comprise a regulatory T cell (Treg) subset with highly suppressive function. We have previously shown that granulocyte-colony stimulating factor…
2020 American Transplant Congress
Tracking Tregs in a Non-Human Primate Model with Expanded Autologous Treg Infusions In Vivo
K. Bruestle¹, B. Piegari¹, H. Sakai¹, F. Fredriksson¹, D. Ekanayake-Alper¹, S. Robertson², D. Hajosi², J. Weiner¹, A. Iuga³, S. M. Coley³, M. Sykes¹, A. Griesemer¹
¹Columbia Center for Translational Immunology, Columbia University, New York City, NY, ²Institute for Comparative Medicine, Columbia University, New York City, NY, ³Department of Pathology and Cell Biology, Columbia University, New York City, NY
*Purpose: Regulatory Tcell (Treg) therapy is a promising tool for tolerance induction in solid organ transplantation. Despite encouraging results in humans and monkeys, questions about…
2020 American Transplant Congress
Transient Cd4+ T Cell and Cd20+ B Cell Depletion Leads to Prolonged Pig-To-Primate Kidney Xenograft Survival
B. P. Lovasik¹, A. J. Matar¹, D. A. Faber¹, D. V. Mathews¹, C. Breeden¹, S. C. Kim¹, A. J. Tector², A. B. Adams¹
¹Emory University School of Medicine, Atlanta, GA, ²University of Miami, Miami, FL
*Purpose: “Delayed” antibody-mediated xenograft rejection is the one of the most important obstacle to clinical application of pig organ xenografts. The aim of this study…
2020 American Transplant Congress
Early Post-Transplant Infusion of Ex Vivo-Expanded Autologous Polyclonal Regulatory T Cells (Treg) Prolongs Kidney Allograft Survival in Non-Lymphodepleted, CTLA4Ig-Treated Rhesus Monkeys
K. Sasaki, Y. Wang, R. Nakano, L. Lu, J. Hughes, V. Vujevich, A. J. Ganoza, M. Wijkstrom, A. Humar, A. W. Thomson, M. B. Ezzelarab
Starzl Transplantation Institute, University of Pittsburgh School of Medicine, Pittsburgh, PA
*Purpose: Rodent studies have demonstrated the utility of regulatory T cell (Treg) infusion for the promotion of tolerance to organ allografts. Here, we evaluated the…