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Effects of ultraviolet radiation exposure on

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To analyze the prevalence and significance of FOXP3+ infiltration into (pre)malignant skin carcinomas following ultraviolet radiation (UVR) exposure. The possible pathways that UVR impacts on FOXP3 are to be discussed.

FOXP3+ regulatory T cells (FOXP3+ Tregs) are correlated to cutaneous squamous tumor progression. However, there is no information describing the prevalence of FOXP3+ infiltration in cutaneous premalignant and malignant squamous carcinomas with UVR exposure.

We investigated the prevalence of FOXP3+ infiltration in 14 patients with Bowen's disease, 40 squamous cell carcinoma SCC patients and 21 patients with basal cell carcinoma (BCC) by immunohistochemistry.

The percentages of FOXP3+ vs. total peri‐neoplasm infiltration cells (FOXP3+ PCT) were significantly higher in Bowen's disease and well‐differentiated SCC that were exposed to UVR than these diseases not exposed to UVR (t = 3.5776, P = 0.0038; t’ = 5.9214, P < 0.01, respectively). FOXP3+ PCT was also higher in less pigmented than pigmented sites in BCC (t = 3.369, P = 0.0032).

This study shed some light on the effect of UVR on FOXP3+ infiltration in skin (pre)malignant carcinomas. Our data suggested that FOXP3+ infiltration was positively related to UVR exposure. The mechanisms merit further investigation.

Document Type: Research Article


Publication date: 2011-12-01

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