Clin Exp Dermatol:绿茶儿茶素可有效修复紫外线造成的皮肤损伤

2022-07-27 MedSci原创 MedSci原创

真皮细胞外基质(ECM)的损失和重塑是人类皮肤光损伤的主要特征。绿茶儿茶素(GTCs)因其抗炎和化学预防特性而被探索,但缺乏关于GTCs对紫外线辐射(UVR)引起的皮肤ECM变化的影响的数据。

真皮细胞外基质(ECM)的损失和重塑是人类皮肤光损伤的主要特征。绿茶儿茶素(GTCs)因其抗炎和化学预防特性而被探索,但缺乏关于GTCs对紫外线辐射(UVR)引起的皮肤ECM变化的影响的数据。近日,发表于 Clin Exp Dermatol的一项双盲随机对照试验探究了炎症剂量的太阳模拟紫外线对人类皮肤ECM的影响以及GTCs的保护潜力。

研究共纳入50名18-65岁的健康白人(Fitzpatrick皮肤I-II型)成人,随机分配到GTCs 540毫克加维生素C 50毫克的组合或安慰剂,每天两次,共12周。通过组织学和免疫组化法评估所有参与者在基线时3倍最小红斑剂量的太阳模拟紫外线对真皮胶原和弹性纤维网络的影响。在补充GTC后,比较了各组之间补充GTC对UVR诱导效应的影响。

 

结果显示,暴露于紫外线的皮肤中,由胶原蛋白和弹性纤维覆盖的乳头状真皮面积明显低于(P < 0.001)未暴露的皮肤。在暴露于UVR的皮肤中,富含纤维蛋白的微纤维(P = 0.02)、纤维蛋白-2(P < 0.001)和纤维蛋白-5(P < 0.001)的水平明显低于未暴露的皮肤,而暴露于UVR的皮肤中procollagen-1的沉积明显较高(P = 0.01)。在补充GTC后,UVR引起的纤维蛋白-5的变化在活性组中被废除,但在安慰剂组中没有,两组之间的其他成分没有显著差异。

综上所述,该研究结果表明,急性紫外线诱导人体真皮胶原蛋白和弹性纤维网络的显著变化,而口服GTCs对纤维蛋白-5有特定的紫外线保护作用。未来的研究可以探索GTCs对人类皮肤反复亚红斑紫外线照射的影响。

 

原始出处:

 

Nisamanee Charoenchon, et al., Ultraviolet radiation-induced degradation of dermal extracellular matrix and protection by green tea catechins: a randomized controlled trial. Clin Exp Dermatol. 2022 Jul;47(7):1314-1323. doi: 10.1111/ced.15179.  

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    2022-09-01 循证小兵

    #绿茶##儿茶素#可有效修复紫外线造成的皮肤损伤,主要是#抗氧化#作用吧

    0

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    2022-07-29 1209e435m98(暂无昵称)

    学习了,谢谢分享

    0

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    2022-07-23 hbwxf
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