title: The role of ICAM-1 in the induction of antigen-specific T cell hyporesponsiveness.
abstract: We have previously demonstrated that pre-transplant transfusion of allogeneic splenic mononuclear cells from B10.BR mice to C3H/HeJ recipient mice resulted in subsequent antigen specific skin graft prolongation and an associated predominance of IL-4-producing T lymphocytes. In this report, we examined the role of ICAM-1 in the induction of T cell hyporesponsiveness and skin graft prolongation following intrahepatic alloantigen delivery. C3H/HeJ mice receiving splenic cells from B10.BR mice intrahepatically showed antigen-specific enhanced skin graft survival. This graft survival was further prolonged following pre-treatment of infused cells with anti-ICAM-1. No such prolongation was seen following intravenous administration of cells in the presence or absence of anti-ICAM-1 pre-treatment. Anti-ICAM-1 infusion alone similarly had no effect when given intrahepatically or peripherally. T lymphocytes from the mice receiving intrahepatic splenic cells and anti-ICAM-1 produced significantly higher amounts of IL-4 compared to mice receiving intrahepatic cells alone or intravenous cells. PCR analysis of ICAM-1 mRNA transcripts demonstrated an increased expression of ICAM-1 in the spleen compared to the liver. These results suggest that ICAM-1 plays an important role in the induction of T cell hyporesponsiveness and allograft prolongation following the intrahepatic encounter of alloantigen.
authors.affiliation: Department of Surgery, Toronto Hospital, University of Toronto, Ontario, Canada.
authors.forename: S W
authors.initials: SW
authors.lastname: Chung
authors.forename: B
authors.initials: B
authors.lastname: Gould
authors.forename: R
authors.initials: R
authors.lastname: Gorczynski
mesh_terms: D000818:Animals; D000938:Antigen-Presenting Cells / Q000276:immunology; D015870:Gene Expression; D006085:Graft Survival; D007111:Immunity, Cellular; D018799:Intercellular Adhesion Molecule-1 / Q000502:physiology*; D007376:Interleukin-2 / Q000096:biosynthesis; D015847:Interleukin-4 / Q000096:biosynthesis; D008099:Liver / Q000502:physiology; D051379:Mice; D008807:Mice, Inbred BALB C; D008809:Mice, Inbred C3H; D008810:Mice, Inbred C57BL; D012333:RNA, Messenger / Q000235:genetics; D015398:Signal Transduction; D016038:Skin Transplantation / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D007376:Interleukin-2; D012333:RNA, Messenger; D018799:Intercellular Adhesion Molecule-1; D015847:Interleukin-4