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. 1995 Dec;147(6):1661–1667.

Altered vascular endothelium integrin expression in psoriasis.

D Creamer 1, M Allen 1, A Sousa 1, R Poston 1, J Barker 1
PMCID: PMC1869965  PMID: 7495291

Abstract

Considerable evidence indicates that microvascular changes observed in psoriasis are a result of vascular proliferation. A critical step in the sequence of events leading to neovascularization involves interactions between endothelial cells and extracellular matrix proteins mediated in part by the integrin family of adhesion molecules. A number of endothelial integrins have been shown to participate in neovascularization, including members of the beta 1, beta 3, and beta 4 subfamilies. To investigate the role of these integrins in psoriasis, specimens of lesional and nonlesional skin were taken from 10 patients with active, untreated plaque disease. Vascular endothelium was labeled with monoclonal antibodies specific for alpha 2, alpha 5, alpha 6, beta 1, av beta 3, and beta 4 integrins. The use of image analysis permitted quantification of immunoperoxidase staining and comparison of endothelial labeling in lesional and nonlesional skin. There was a significant increase in endothelial staining of av beta 3 integrin in lesional compared with nonlesional skin, both in superficial and deep vasculature. In contrast, there was a significant decrease in endothelial beta 4 staining in lesional compared with nonlesional superficial dermal vessels, alpha 2, alpha 5, alpha 6, and beta 1 staining showed no significant difference between the two groups. These results demonstrate an important role of av beta 3 and beta 4 integrins in the microvascular changes of psoriatic lesions.

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Selected References

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