Abstract
An increase of subcutaneous fat presses lymph vessels and blood vessels in skin tissues, and results in not only causing skin troubles such as skin sagging and swelling but also forming cellulite that makes bodylines worse. To expand further application of plant extracts to cosmetics, we focused on inhibitory effects of subcutaneous preadipocyte differentiation and facilitating lipolysis in adipocytes. In this study, in a screening test of a number of plant extracts, Coptis japonica root extract and its key component, berberine, showed potent inhibition of triglyceride accumulation and subcutaneous preadipocyte differentiation. Furthermore, Coptis japonica root extract and berberine down-regulated the mRNA expression level of several differentiation factors derived from subcutaneous preadipocytes. Coptis japonica root extract and berberine in subcutaneous adipocytes facilitated lipolysis in mature adipocytes. Our study suggested that Coptis japonica root extract and its key component, berberine, is expected to be useful for slimming and related skin troubles such as skin sagging, swelling, cellulite, and so on.
