Expression promoter for peroxisome proliferation-activated receptor genes PPARA and PPARG

The invention provides an expression promoter of keratinocyte peroxisome proliferation activated receptor genes PPARA and PPARG, the expression promoter is a selaginella tamariscina extract, and the total sugar content in the selaginella tamariscina extract is greater than or equal to 4.22 wt%, the total polyphenol content is greater than or equal to 0.41 wt%, and/or the total flavone content is greater than or equal to 1.1 wt%. The invention also relates to an application of the selaginella tamariscina extract as an expression promoter of keratinocyte peroxisome proliferation activated receptor genes PPARA and PPARG in an external preparation for skin. 本发明提供了一种角质形成细胞过氧化物酶体增殖活化受体基因PPARA和PPARG的表达促进剂，其中，所述表达促进剂是卷柏提取物，所述卷柏提取物中总糖含量≥4.22wt％，总多酚含量≥0.41wt％，和/或总黄酮含量≥1.1wt％。本发明还涉及卷柏提取物作为角质形成细胞过氧化物酶体增殖活化受体基因PPARA和PPARG的表达促进剂在皮肤外用剂中的应用。