RESUMO
Aim To identify chemical constituents of supercritical extract from Pteridium aquilinum (Linn.) Kuhn (SFEPA) and investigate its antiadipogenic effect and underlying mechanism. Methods The chemical constituents of SFEPA were identified by GCMS. The differentiation of 3T3L1 preadipocytes was induced to establish cell model. MTT assay was employed to detect cell viability. Oil Red 0 staining was used to analyze the effect of SFEPA on the differentiation of 3T3L1 preadipocytes. qRTPCR was performed to examine the expression of genes related with adipogenesis and lipogenesis. Results Ten compounds of SFEPA were identified. The major constituents were 4, 4, 5, 7, 8pentamethyldihydrocoumarin (36. 0 7 %), ßsitosterol (25. 6 6 %), 4amino7diethylaminochromen2one (8 . 2 6 %) and palmitic acid (5. 0 5 %). SFEPA suppressed 3T3L1 adipocyte differentiation and reduced fat accumulation in a dosedependent manner. Treatment of SFEPA significantly downregulated the mRNA expression of PPARy, C/ EBPa, SREBPlc, as well as FAS and ACC. Conclusions SFEPA can inhibit the adipogenesis and differentiation of 3T3L1 cells, and its mechanism may be closed related to its inhibition of genes expression regulating adipogenesis and lipogenesis. Phenols and alcohols might be potential bioactive components.
RESUMO
To explore the effect of icariside ? on osteoprotegerin(OPG) expression in osteoblasts, primary osteoblasts were cultured with different concentration of icariside ? and 17?estradiol. As a major metabolite of icarrin in vivo, icariside ? exerted a better effect on OPG expression which plays a key role in osteoporosis. 20 ng/dl icariside ? also exerted better effect on OPG secretion than that of positive control group. Consequently, icariside ?could be a candidate for osteoporosis treatment.