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Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 J+Nat+Prod 2015 ; 78 (8): 2110-5 Nephropedia Template TP
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Upregulation of Collagen Expression via PPARbeta/delta Activation in Aged Skin by Magnesium Lithospermate B from Salvia miltiorrhiza #MMPMID26280594
Jung YR; Lee EK; Kim DH; Park CH; Park MH; Jeong HO; Yokozawa T; Tanaka T; Im DS; Kim ND; Yu BP; Mo SH; Chung HY
J Nat Prod 2015[Aug]; 78 (8): 2110-5 PMID26280594show ga
This study investigated the agonistic activity of magnesium lithospermate B (1), isolated from Salvia miltiorrhiza, on peroxisome proliferator-activated receptor (PPARbeta/delta) and the expressions of collagen genes (COL1A1 and COL3A1) and transforming growth factor-beta1 (TGF-beta1) in models of skin aging. The action of compound 1 as a PPARbeta/delta agonist was determined by reporter gene assay, immunostaining, and Western blotting. To determine the antiaging effects of compound 1 on skin, aged Sprague-Dawley rat skin and ultraviolet B (UVB)-irradiated human skin fibroblasts were used. The results show that 1 presented a marked enhancement of both nuclear protein levels and activity of PPARbeta/delta in fibroblasts. In addition, 1 prevented downregulation of PPARbeta/delta activity in aged rat skin and UVB-induced fibroblasts. Furthermore, 1 increased the expressions of COL1A1, COL3A1, and TGF-beta1 in vivo and in a cell culture system. Therefore, the present study shows that compound 1 prevents collagen degradation in aged rat skin and UVB-exposed fibroblasts through PPARbeta/delta activation. The therapeutic and cosmetic applications of compound 1 need further investigation.