title: Up-regulation of CD11a (LFA-1) expression on peripheral CD4+ T cells in primary biliary cirrhosis.
abstract: Up-regulation of CD11a expression on CD4+ T lymphocytes is considered to be one of the mechanisms involved in the initiation of the Th-1-mediated immune response. In this study, peripheral blood mononuclear cells from patients with primary biliary cirrhosis (PBC) were evaluated for CD11a(high) CD2(low) T cells and populations of type 1 (Th-1) and type 2 (Th-2) helper T cells. CD11a(high) CD2(low) T cells were found in PBC (7/15) and in active rheumatoid arthritis (4/4), but not in chronic hepatitis C (0/5) or in healthy subjects (0/6). The population of Th-1 had a positive correlation with that of CD4+ CD11a(high) CD2+ cells in patients with PBC (P = 0.034). The serum levels of interferon-gamma also had a weak correlation with the population of CD4+ CD11a(high) CD2(low) cells (P = 0.050). There was no statistically significant correlation of Th-2 population (P = 0.295) or serum interleukin-4 level (P = 0.685) with the population of CD4+ CD11a(high) CD2(low) cells. These results suggest that CD4+ CD11a(high) cells play a role in Th-1-predominance and in the autoimmune process of PBC.
authors.affiliation: Department of Internal Medicine, Tohoku University School of Medicine, Sendai, Japan.
authors.forename: Masaaki
authors.initials: M
authors.lastname: Shiina
authors.forename: Koju
authors.initials: K
authors.lastname: Kobayashi
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Mano
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Ueno
authors.forename: Motoyasu
authors.initials: M
authors.lastname: Ishii
authors.forename: Tooru
authors.initials: T
authors.lastname: Shimosegawa
mesh_terms: D001172:Arthritis, Rheumatoid / Q000276:immunology; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology / Q000502:physiology*; D005260:Female; D005434:Flow Cytometry; D019698:Hepatitis C, Chronic / Q000276:immunology; D006801:Humans; D008105:Liver Cirrhosis, Biliary / Q000276:immunology*; D016169:Lymphocyte Function-Associated Antigen-1 / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D010641:Phenotype; D015854:Up-Regulation
chemical_list: D016169:Lymphocyte Function-Associated Antigen-1