title: In vitro cytokine modulation of intercellular adhesion molecule-1 expression on systemic sclerosis dermal fibroblasts.
abstract: Our objective was to study the regulation of intercellular adhesion molecule-1 (ICAM-1) expression by cytokines on cultured fibroblasts obtained from systemic sclerosis and normal skin. ICAM-1 expression on dermal fibroblasts obtained from diffuse systemic sclerosis patients with early disease (< or = 2 years) and normal dermal fibroblasts incubated with and without cytokines was measured by radioimmunoassay and flow cytometry. Systemic sclerosis dermal fibroblasts expressed lower basal levels of ICAM-1 than did normal dermal fibroblasts. Both the normal and systemic sclerosis dermal fibroblasts increased their cell surface expression of ICAM-1 in response to interleukin-1 beta (IL-1 beta), tumor necrosis factor-alpha (TNF-alpha), and interferon-gamma (IFN-gamma) in a dose-dependent fashion. Systemic sclerosis dermal fibroblasts appeared to be hyperresponsive to IL-1 beta, TNF-alpha, and IFN-gamma. ICAM-1 expression in response to cytokine stimulation increased to a greater degree on systemic sclerosis compared to normal dermal fibroblasts. The enhanced ICAM-1 expression may play a role in the retention of leukocytes involved in systemic sclerosis skin lesions.
authors.affiliation: Department of Medicine, Northwestern University Medical School, Chicago, Ill. 60611.
authors.forename: M M
authors.initials: MM
authors.lastname: Cho
authors.forename: S A
authors.initials: SA
authors.lastname: Jimenez
authors.forename: B A
authors.initials: BA
authors.lastname: Johnson
authors.forename: L A
authors.initials: LA
authors.lastname: Harlow
authors.forename: J C
authors.initials: JC
authors.lastname: Burrows
authors.forename: A E
authors.initials: AE
authors.lastname: Koch
mesh_terms: D000328:Adult; D002478:Cells, Cultured; D016207:Cytokines / Q000494:pharmacology*; D005260:Female; D005347:Fibroblasts / Q000378:metabolism; D005434:Flow Cytometry; D006801:Humans; D018799:Intercellular Adhesion Molecule-1 / Q000096:biosynthesis*; D007371:Interferon-gamma / Q000494:pharmacology; D007375:Interleukin-1 / Q000494:pharmacology; D008297:Male; D008875:Middle Aged; D011863:Radioimmunoassay; D012595:Scleroderma, Systemic / Q000378:metabolism*; D012867:Skin / Q000378:metabolism*; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology
chemical_list: D016207:Cytokines; D007375:Interleukin-1; D014409:Tumor Necrosis Factor-alpha; D018799:Intercellular Adhesion Molecule-1; D007371:Interferon-gamma