Abstract:
PURPOSE: A cosmetic composition containing kurarinone or a Sophora flavescens extract is provided to suppress cell activity causing dermatitis including atopic dermatitis, psoriasis, and contact dermatitis. CONSTITUTION: A cosmetic composition for preventing and treating psoriasis, atopic dermatitis, or contact dermatitis contains kurarinone of chemical formula 1 or a salt thereof as an active ingredient. The cosmetic composition contains a Sophora flavescens extract as an active ingredient. The extract contains a compound selected from a group consisting of kurarinol, kurarinone, kushenol N, kushenol I, kushenol M, kuraridin, 8-lavandulylkaempferol, (2S)-2'-methoxykurarinone, sophoraflavanone G, trifolirhizin, (-)maackiain, variabilin, medicarpin, and sophoracarpan A. The extract is prepared using a solvent selected from a group consisting of water, C1-C6 alcohol, ethyl acetate, methylene chloride, dichloromethane, chloroform, n-Hexane, diethylether, acetone, and benzene.