Articles tagged "Antigen presentation"

2020 American Transplant Congress
Evaluating Preformed Donor HLA Reactive T Cells Using PIRCHE-II Algorithm
T. Tomosugi¹, K. Iwasaki², S. Sakamoto¹, A. Kanda¹, K. Futamura¹, M. Okada¹, T. Hiramitsu¹, N. Goto¹, S. Narumi¹, Y. Watarai¹, T. Kobayashi², M. Niemann³, E. Spierings⁴
¹Transplant and Endocrine Surgery, Nagoya Daini Red Cross Hospital, Nagoya, Aichi, Japan, ²Kidney Transplant Surgery, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan, ³PIRCHE AG, Berlin, Germany, ⁴University Medical Center Utrecht, Utrecht, Netherlands
*Purpose: De novo donor-specific HLA antibodies (dnDSA) production involves the indirect allorecognition pathway in which recipient CD4+T cells recognize donor-HLA-derived peptide and recipient HLA class…
2020 American Transplant Congress
Accelerated Bronchiolitis Obliterans after Lung Transplant Promoted by the ATG16L1 rs2241880 Mutation is Coupled to Mitochondrial Damage and Metabolic Alterations in Monocyte-Derived Alveolar Macrophages
M. Cano¹, D. Zhou², D. Kreisel³, C. Chen⁴, K. Pugh², D. Byers¹, R. Hachem¹, A. E. Gelman³
¹Pulmonary and Critical Care, Washington University, Saint Louis, MO, ²Surgery, Washington University, Saint Louis, MO, ³Surgery and Pathology and Immunology, Washington University, Saint Louis, MO, ⁴Pulmonary and Critical Care, 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 and require…
2020 American Transplant Congress
Strong Engagement of CD137 Suppresses Graft-Versus-Host Disease Through Dendritic Cells
H. Cho¹, J. Lee², B. Kwon³, S. Park⁴, H. Park⁴, K. Yoo², K. Park², J. Kim³, S. Kang³
¹Ulsan University Hospital, Ulsan, Korea, Republic of, ²Nephrology, Ulsan University Hospital, Ulsan, Korea, Republic of, ³Biomedical Research Center, Ulsan University Hospital, Ulsan, Korea, Republic of, ⁴Surgery, Ulsan University Hospital, Ulsan, Korea, Republic of
*Purpose: We previously demonstrated that anti-CD137 agonist prevent acute graft-versus-host disease (GVHD) and chronic GVHD in the parent-into-unirradiated F1 acute or chronic GVHD model. Although…
2020 American Transplant Congress
Tertiary Lymphoid Organs in Renal Chronic Allograft Rejection
K. Abou Daya, D. Zhao, K. Biery, M. Oberbarnscheidt
Starzl Transplantation Institute, Pittsburgh, PA
*Purpose: Chronic allograft rejection remains a major obstacle to long-term allograft survival. Tertiary lymphoid organs (TLOs) are ectopic lymphoid structures that arise in non-lymphoid tissues…
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:…