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Skin immunosuppression by UVB irradiation and photoprotection by ( - )-epigallocatechin-3-gallate
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF DERMATOLOGY
- Issue:
- 9
- DOI:
- 10.3760/j.issn:0412-4030.2006.09.003
- Key Word:
- 紫外线;干扰素Ⅱ型;白细胞介素10;表没食子儿茶素没食子酸酯
Abstract： 目的 探讨表没食子儿茶素没食子酸酯(EGCG)对不同剂量中波紫外线(UVB)慢性辐射BALB/c小鼠皮肤的保护作用.方法 EGCG局部外用于小鼠背部皮肤后予不同强度UVB辐射,每日1次,连续1个月,RT-PCR法检测IFN-γ和IL-10 mRNA的表达水平变化.结果 不同剂量UVB慢性辐射后小鼠皮肤中IFN-γ mRNA表达水平较对照组降低(P＜0.01),IL-10 mRNA表达水平较对照组升高(P＜0.01),并与UVB辐射强度呈一定剂量依赖关系.EGCG处理后可影响UVB辐射诱导上述细胞因子表达(P＜0.01).结论 UVB辐射下调IFN-γ和上调IL-10转录水平,可能与UVB辐射诱导局部免疫抑制有关.
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