title: Abnormalities of T lymphocyte subsets in systemic sclerosis demonstrated with anti-CD45RA and anti-CD29 monoclonal antibodies.
abstract: T cell subpopulations were assessed by two colour flow cytometry with phycoerythrin conjugated anti-CD45RA and anti-CD29 and fluorescein conjugated anti-CD4 and anti-CD8 monoclonal antibodies, on peripheral blood lymphocytes from 12 patients with systemic sclerosis and from nine control subjects. The percentage of CD4+CD29+ cells was significantly higher in patients with systemic sclerosis than in controls (mean (SEM) 68.8 (3.1) v 47.9 (4.1) respectively). CD4+CD45RA+ cells were not significantly different in patients and controls. CD8+CD29+ and CD8+CD45RA+ subpopulations were significantly higher in patients with systemic sclerosis than in controls (83.0 (3.2) v 58.7 (6.8) and 80.2 (3.0) v 66.9 (3.2) respectively). The increase in the percentage of CD29+ cells suggests an activation of memory cells in patients with systemic sclerosis, which may play an important part in the pathogenesis of the disease.
authors.affiliation: INSERM U-283, Hôpital Cochin, Paris, France.
authors.forename: A
authors.initials: A
authors.lastname: Kahan
authors.forename: A
authors.initials: A
authors.lastname: Kahan
authors.forename: F
authors.initials: F
authors.lastname: Picard
authors.forename: C J
authors.initials: CJ
authors.lastname: Menkès
authors.forename: B
authors.initials: B
authors.lastname: Amor
mesh_terms: D000911:Antibodies, Monoclonal; D015703:Antigens, CD / Q000276:immunology; D000943:Antigens, Differentiation / Q000276:immunology; D005260:Female; D005434:Flow Cytometry / Q000379:methods; D005455:Fluorescent Antibody Technique; D006649:Histocompatibility Antigens / Q000276:immunology; D006801:Humans; D019012:Integrin beta1; D017493:Leukocyte Common Antigens; D008297:Male; D012595:Scleroderma, Systemic / Q000276:immunology* / Q000473:pathology; D016176:T-Lymphocyte Subsets / Q000276:immunology / Q000473:pathology*
chemical_list: D000911:Antibodies, Monoclonal; D015703:Antigens, CD; D000943:Antigens, Differentiation; D006649:Histocompatibility Antigens; D019012:Integrin beta1; D017493:Leukocyte Common Antigens