Articles tagged "Antigen presentation"

2021 American Transplant Congress
The Contribution of Disulfide-hmgb1 Released During Ischemia-reperfusion Injury to Pro-inflammatory Macrophage Polarization Following Liver Transplantation
A. Q. Terry, R. A. Sosa, M. Rossetti, J. Nevarez-Mejia, B. V. Naini, F. Kaldas, V. Groysberg, S. Younan, R. Busuttil, D. W. Gjertson, J. W. Kupiec-Weglinski, E. Reed
Pathology and Lab Medicine, UCLA, Los Angeles, CA
*Purpose: Ischemia-reperfusion injury (IRI) during liver transplantation (LT) is a pro-inflammatory response linked to poorer outcomes, including increased alloimmunity, post-LT. We previously showed that post-reperfusion…
2021 American Transplant Congress
Tissue Specific Antigen-presentation in VCA Transplantation
B. Kern¹, J. Mengwasser¹, A. Reutzel-Selke¹, M. I. Ashraf¹, D. Polenz¹, K. Fuehrer¹, S. Lippert¹, P. Tang¹, F. Martin¹, C. Witzel¹, I. M. Sauer¹, J. Pratschke¹, S. G. Tullius²
¹Dept. of Surgery, Charité Campus CCM|CVK, Universitaetsmedizin Berlin, Germany, Berlin, Germany, ²Division of Transplant Surgery and Transplant Surgery Research Laboratory, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
*Purpose: Vascular Composite Tissue Allotransplantation (VCA) has become a clinical reality. High frequencies of acute rejections remain an unsolved problem. Here, we delineated components of…
2021 American Transplant Congress
Accelerated Bronchiolitis Obliterans After Lung Transplant Promoted by an ATG16L1 Mutation is Coupled to Mitochondrial Damage and Metabolic Alterations in Monocyte-derived Antigen Presenting Cells
M. Cano¹, D. Zhou¹, D. Kreisel¹, C. Chen², K. Pugh¹, D. Byers¹, R. Hachem¹, A. Gelman¹
¹Washington University, Saint Louis, MO, ²UT Southwestern Medical Center, Dallas, TX
*Purpose: Bronchiolitis obliterans (BOS) remains a major cause of death for lung transplant recipients, and the mechanisms that drive BOS remain poorly understood. It is…
2020 American Transplant Congress
Lymph Node Stromal Laminin Alpha5 Regulates Antigen Specific T Cell Adaptive Immunity
L. Li¹, M. Shirkey¹, W. Piao¹, Y. Xiong¹, V. Saxena¹, T. Zhang¹, C. Paluskievicz¹, J. Zhao², R. Abdi², J. S. Bromberg¹
¹UMB, Baltimore, MD, ²Harvard University, Boston, MA
*Purpose: Laminin α5 (Lama5) is associated with immunity and regulates T cell entry and responses within the lymph node (LN). We hypothesized that stromal Lama5…
2020 American Transplant Congress
Role of Cross-Dressing in Kidney Transplantation
D. Zhao, R. Tieu, K. Abou-Daya, A. Williams, M. Oberbarnscheidt, F. Lakkis
Thomas E. Starzl Transplantation Institute, Pittsburgh, PA
*Purpose: Activation of host T cells that mediate allograft rejection is relied on dendritic cells (DCs) presenting alloantigens to T cells. Our recent study revealed…
2020 American Transplant Congress
Migration of Passenger Leukocytes During Ex Vivo Warm Perfusion
L. Brasile¹, B. Stubenitsky²
¹Research and Development, BREONICS Inc., Watervliet, NY, ²Plastic, Reconstructive & Aesthetic Surgery, St. Antonius Hospital, Utrecht, Netherlands
*Purpose: Organ transplantation is a unique immunologic situation in which donor and recipient antigen presenting cells (APCs) are present upon reperfusion. Passenger leukocytes (PL) are…
2020 American Transplant Congress
Long-Term Allograft Survival via Donor MHC Chimerism Induced by Exosomes
B. Gonzalez Nolasco, X. Wang, M. Wang, A. Prunevieille, K. M. Lee, J. F. Markmann, G. Benichou
Surgery - Center for Transplantation Sciences, Massachusetts General Hospital & Harvard Medical School, Boston, MA
*Purpose: Allogeneic transplant tolerance has been achieved by inducing mixed hematopoietic chimerism via donor bone marrow transplantation. Tolerance mechanisms in this model involve the presentation…
2020 American Transplant Congress
Xenoantibody Depletion of Human Blood with Normothermic Machine Perfusion of Porcine Kidney and Lung Prior to Liver Perfusion
T. M. Coe¹, N. Serifis¹, S. Raigani¹, C. Carroll¹, C. G. Rickert¹, R. Matheson¹, D. Detelich², W. Qin³, Y. Kan³, J. Layer³, M. Youd³, W. Westlin³, L. Yang³, A. Azimzadeh¹, J. F. Markmann¹
¹Surgery, Massachusetts General Hospital, Boston, MA, ²Surgery, Tufts Medical Center, Boston, MA, ³eGenesis, Cambridge, MA
*Purpose: Genetic modifications of porcine donors for pig-to-human xenotransplantation have led to significant progress in survival of xenografts in preclinical models. Triple knock-out (TKO) of…
2020 American Transplant Congress
The Role of Galectin-1 and Basement Membrane Remodeling in Kidney Antibody-Mediated Rejection
S. Clotet-Freixas¹, C. McEvoy¹, I. Batruch², M. Kotlyar³, C. Pastrello³, J. Van¹, M. Arambewela¹, A. Boshart¹, S. Farkona¹, A. Bozovic⁴, V. Kulasingam⁴, P. Chen¹, I. Jurisica³, A. Chruscinski¹, R. John⁴, A. Konvalinka⁵
¹Toronto General Hospital Research Institute, University Health Network, Toronto, ON, Canada, ²Department of Laboratory Medicine and Pathobiology, Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, ON, Canada, ³Krembil Research Institute, University Health Network, Toronto, ON, Canada, ⁴Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada, ⁵Department of Medicine, Division of Nephrology, University Health Network, Toronto, ON, Canada
*Purpose: Antibody-mediated rejection (AMR), the leading cause of kidney graft loss, is caused by anti-HLA and non-HLA antibodies against proteins in two main kidney compartments:…
2020 American Transplant Congress
Single Cell RNA Sequencing of Murine Kidney Allografts Identifies Macrophage Gene Signature Associated with Acute Rejection
A. Dangi¹, N. Natesh², M. Monal¹, J. Wang³, X. Shen², X. Luo¹
¹Nephrology/Medicine, Duke University, Durham, NC, ²Biomedical Engineering, Duke University, Durham, NC, ³Surgery, Duke University, Durham, NC
*Purpose: Evaluating kidney allografts using single cell RNA sequencing (scRNAseq) can provide a comprehensive qualitative and quantitative gene expression data on thousands of individual cells.…