title: PD-1/B7-H1 interaction contribute to the spontaneous acceptance of mouse liver allograft.
abstract: The programmed death-1 (PD-1)/B7-H1 pathway acts as an important negative regulator of immune responses. We herein investigated the role of the PD-1/B7-H1 pathway in establishing an immunological spontaneous tolerance status in mouse liver allografting. B7-H1 is highly expressed on the donor-derived tissue cells and it is also associated with the apoptosis of infiltrating T cells in the allografts. Strikingly, a blockade of the PD-1/B7-H1 pathway via anti-B7-H1mAb or using B7-H1 knockout mice as a donor led to severe cell infiltration as well as hemorrhaging and necrosis, thus resulting in mortality within 12 days. Furthermore, the expression of the FasL, perforin, granzyme B, iNOS and OPN mRNA in the liver allografts increased in the antibody-treated group in comparison to the controls. Taken together, these data revealed that the B7-H1 upregulation on the tissue cells of liver allografts thus plays an important role in the apoptosis of infiltrating cells, which might play a critical role of the induction of the spontaneous tolerance after hepatic transplantation in mice.
authors.affiliation: Education and Research Center of Animal Models for Human Diseases, Fujita Health University School of Medicine, Aichi, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Morita
authors.forename: M
authors.initials: M
authors.lastname: Fujino
authors.forename: G
authors.initials: G
authors.lastname: Jiang
authors.forename: Y
authors.initials: Y
authors.lastname: Kitazawa
authors.forename: L
authors.initials: L
authors.lastname: Xie
authors.forename: M
authors.initials: M
authors.lastname: Azuma
authors.forename: H
authors.initials: H
authors.lastname: Yagita
authors.forename: S
authors.initials: S
authors.lastname: Nagao
authors.forename: A
authors.initials: A
authors.lastname: Sugioka
authors.forename: Y
authors.initials: Y
authors.lastname: Kurosawa
authors.forename: S
authors.initials: S
authors.lastname: Takahara
authors.forename: J
authors.initials: J
authors.lastname: Fung
authors.forename: S
authors.initials: S
authors.lastname: Qian
authors.forename: L
authors.initials: L
authors.lastname: Lu
authors.forename: X-K
authors.initials: XK
authors.lastname: Li
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000008:administration & dosage; D000954:Antigens, Surface / Q000276:immunology*; D017209:Apoptosis; D051017:Apoptosis Regulatory Proteins / Q000037:antagonists & inhibitors / Q000276:immunology*; D018122:B7-1 Antigen / Q000235:genetics / Q000276:immunology*; D060890:B7-H1 Antigen; D006084:Graft Rejection / Q000276:immunology / Q000473:pathology; D006085:Graft Survival / Q000276:immunology; D007108:Immune Tolerance; D016031:Liver Transplantation / Q000276:immunology* / Q000473:pathology; D008297:Male; D008562:Membrane Glycoproteins / Q000037:antagonists & inhibitors / Q000172:deficiency / Q000235:genetics / Q000276:immunology*; D051379:Mice; D008809:Mice, Inbred C3H; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D010455:Peptides / Q000037:antagonists & inhibitors / Q000172:deficiency / Q000235:genetics / Q000276:immunology*; D061026:Programmed Cell Death 1 Receptor; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D013601:T-Lymphocytes / Q000276:immunology / Q000473:pathology; D018183:Transplantation Chimera / Q000276:immunology; D014184:Transplantation, Homologous
chemical_list: D000911:Antibodies, Monoclonal; D000954:Antigens, Surface; D051017:Apoptosis Regulatory Proteins; D018122:B7-1 Antigen; D060890:B7-H1 Antigen; C498919:Cd274 protein, mouse; D008562:Membrane Glycoproteins; C491383:Pdcd1 protein, mouse; D010455:Peptides; D061026:Programmed Cell Death 1 Receptor; D012333:RNA, Messenger