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The frequency of CLA+ CD8+ T cells in the blood of psoriasis patients correlates closely with the severity of their disease

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Authors
Sigmundsdottir, H
Gudjonsson, JE
Jonsdottir, I
Ludviksson, BR
Valdimarsson, H
Issue Date
2001-11-01

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Citation
Clin. Exp. Immunol. 2001, 126(2):365-9
Abstract
Psoriasis is thought to be a T cell-mediated skin disease and the cutaneous lymphocyte antigen (CLA) is an important skin homing epitope for T cells. We have studied the relationship between disease severity (PASI) and phenotypic analysis of T cells in the blood of 36 patients with psoriasis focusing on the expression of CLA, VLA-4 and CD25 on CD4+ and CD8+ T cells. The patients had a higher frequency of circulating CLA+ CD8+ cells than healthy controls. Furthermore, a much stronger correlation was observed between PASI and the frequency of CLA+ CD8+ than CLA+ CD4+ T cells. The frequency of CLA+D8+ T cells correlated more strongly with redness, thickness and scaling of the skin lesions than the total affected body surface area. In contrast to CLA the T cell expression of VLA-4 did not demonstrate any such correlation. Finally, the expression of the activation marker CD25 on CD8+ T cells showed a strong correlation with disease severity in patients with moderate to severe psoriasis (PASI > 10) but such correlation was not observed for CD4+ T cells. These findings support the notion that circulating CLA+ CD8+ T cells may play an important role in the pathogenesis of psoriasis.
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http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1906191
ae974a485f413a2113503eed53cd6c53
10.1111/j.1365-2249.2001.01688.x
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