Immunolocalization of adhesion molecules in psoriatic arthritis, psoriatic and normal skin

The British Journal of Dermatology
D VealeO Fitzgerald

Abstract

Adhesion molecule expression in synovial membrane obtained from patients with psoriatic arthritis (PA) has previously been compared with rheumatoid arthritis (RA). Although expression of intercellular adhesion molecule-1 (ICAM-1) and vascular cell adhesion molecule-1 (VCAM-1) was similar in both psoriatic and rheumatoid synovium, in contrast, little or no endothelial leucocyte adhesion molecule-1 (ELAM-1) was observed in psoriatic synovium. In the present study, the expression of ICAM-1, ELAM-1 and VCAM-1 was examined in the involved and uninvolved skin from patients with PA (n = 15), patients with psoriasis (Ps) but no arthritis (n = 5) and in normal skin (n = 4). ICAM-1 was intensely expressed on endothelium and keratinocytes of involved skin from patients with Ps with or without arthritis. There was constitutive expression of ICAM-1 on endothelium only in uninvolved and normal skin. In contrast, ELAM-1 expression was restricted to endothelial cells; it was widespread and intense in involved skin, but was minimal in uninvolved and normal skin. VCAM-1 was expressed on endothelium, and also on some dendritic cells in involved psoriatic skin. There was minimal VCAM-1 staining on endothelial cells in uninvolved and normal skin. I...Continue Reading

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Citations

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