Abstracts Archive - Page 626 of 1683 - ATC Abstracts

2019 American Transplant Congress
TMA Development in Kidney and Heart Xenografts Treated with Anti-CD40 or Anti-CD154 Antibodies
D. H. Ma¹, H. Sasaki¹, J. M. O¹, K. Ahrens¹, D. Becerra¹, C. G. Rickert¹, D. M. Detelich¹, T. Oura¹, W. Somer¹, I. Rosales², R. N. Pierson¹, J. Markmann¹, J. C. Madsen¹, T. Kawai¹
¹Surgery, MGH, Boston, MA, ²Pathology, MGH, Boston, MA
*Purpose: Genetically modified Galactose-α 1,3-galactose knockout transgenic swine expressing human CD55 (GTKO.hCD55) are resistant to hyperacute rejection of xenografts. We compare anti-CD154 and anti-CD40 antibody-based…
2019 American Transplant Congress
Targeted Epitope Mutagenesis as a Strategy to Decrease Xenoantibody Binding
J. Ladowski, G. Martens, Z. Wang, L. Reyes, M. Tector, J. Tector
University of Alabama-Birmingham, Birmingham, AL
*Purpose: Xenotransplantation, the use of genetically-modified pig organs for transplantation, has been limited by antibody-mediated rejection. The generation of a three-antigen knockout pig provided a…
2019 American Transplant Congress
Xenorejection of Porcine Islets in Humanized Mice is Dominated by a Human Th17 Cytokine Immune Response
F. T. Lee¹, A. Dangi², M. Burnette², B. Hering³, X. Luo²
¹Transplant Surgery, Northwestern University, Chicago, IL, ²Nephrology, Duke University, Durham, NC, ³Diabetes Institute, University of Minnesota, Minneapolis, MN
*Purpose: We have previously shown that interleukin(IL)-17 producing CD4 T cells (Th17 response) dominate in the early anti-donor immune responses of a pig-to-mouse xenogeneic model…
2019 American Transplant Congress
Prevention of Islet Allo- and Xenograft Rejection with Immunoglobulin M Immunotherapy
M. Ma, P. Chhabra, K. Brayman
Surgery, University of Virginia, Charlottesville, VA
*Purpose: To investigate if IgM therapy mitigates islet allo- and xenotransplant rejection and promotes permanent islet survival.*Methods: 1) New onset diabetic NOD mice (n=14) were…
2019 American Transplant Congress
Investigation and Regulation of Induced Anti-Pig Antibody Production in GTKO Pig-to-Cynomolgus Monkey Artery Retransplantation
S. Hurh¹, E. Lee¹, J. Jeong², G. Lee¹, S. Park¹, S. Ahn³, S. Min³, C. Ahn⁴
¹Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea, Republic of, ²Department of Nephrology, Ajou University School of Medicine, Suwon, Korea, Republic of, ³Department of Surgery, Seoul National University Hospital, Seoul, Korea, Republic of, ⁴Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea, Republic of
*Purpose: Although the recent progress in xenograft survival in pig-to-nonhuman primate heart and kidney transplantation, little is known about retransplantation in pig antigen-sensitized recipient. This…
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
TCR Transgenes to Understand Human Xenotolerance Induction
G. Nauman, C. Borsotti, N. Danzl, M. Khosravi-Maharlooei, H. Li, E. Chavez, Y. Yang, M. Sykes
Columbia Center for Translational Immunology, New York, NY
*Purpose: Swine thymus transplantation is a promising approach to clinical tolerance for pig-to-human xenotransplantation. In humanized mice, a swine thymus graft supports de novo selection…
2019 American Transplant Congress
Perioperative Cardiac Xenograft Dysfunction after Orthotopic Transplantation is for Real
M. Mohiuddin¹, A. Singh¹, L. DiChiacchio¹, D. Kaczorowski¹, B. Lewis¹, T. Zhang¹, F. Sentz¹, I. Tatarov¹, D. Parsell¹, P. Odonkor¹, E. Strauss¹, B. Williams¹, K. Deatrick¹, D. Ayares², B. Griffith¹, S. Bartlett¹
¹Department of Surgery, University of Maryland Baltimore, Baltimore, MD, ²Revivicor, Inc, Blacksburg, VA
*Purpose: After successful prolongation of cardiac xenograft survival in a heterotopic position, the next step is to evaluate genetically engineered (GE) pig hearts for their…
2019 American Transplant Congress
α -1,3-galactosyltransferase Knockout Porcine Tissue And Organ May Reduce The Risks Of Antibody Mediated Rejection Via Less Rhesus Igm Cross-reactivity.
J. Yoon, B. Ezekian, M. Manook, J. Kwun, S. Knechtle
Duke Transplant Center, Durham, NC
*Purpose: Previously, we observed that sera from rhesus macaques contained preformed antibodies against wild type (WT) swine splenocytes. In the context of xenotransplantation, preformed xenoantibodies…
2019 American Transplant Congress
Inhibition of Sialidase Activity and Galectin Binding Reduces Xenogeneic Neutrophil-Endothelial Adhesion
B. M. Cerel¹, B. M. French², D. G. Harris², C. Laird², L. Burdorf¹, X. Cheng², C. Feng³, A. S. Cross⁴, S. E. Goldblum⁴, G. R. Vasta³, R. N. Pierson III¹, A. M. Azimzadeh¹
¹Deparment of Surgery, Massachusetts General Hospital, Boston, MA, ²Department of Surgery, University of Maryland School of Medicine, Baltimore, MD, ³Department of Microbiology and Immunology, and Institute of Marine and Environmental Technology, University of Maryland School of Medicine, Baltimore, MD, ⁴Department of Medicine Center for Vaccine Development, University of Maryland School of Medicine, Baltimore, MD
*Purpose: Immediate neutrophil sequestration occurs despite genetic modifications (Gal-a-1-3 galactosyl transferase knock out; human CD46 complement regulatory gene addition) to pig donor organs. Sialic acids…