Abstract：
:Peroxisome proliferator activated receptor (PPAR) is a nuclear receptor that is one of the transcription factors regulating lipid and glucose metabolism. Fermented ginseng (FG) is a ginseng fermented by Lactobacillus paracasei A221 containing minor ginsenosides and metabolites of fermentation. DNA microarray analysis of rat liver treated with FG indicated that FG affects on lipid metabolism are mediated by PPAR-α. To identify a PPAR-α agonist in FG, PPAR-α transcription reporter assay-guided fractionation was performed. The fraction obtained from the MeOH extract of FG, which showed potent transcription activity of PPAR-α, was fractionated by silica gel column chromatography into 16 subfractions, and further separation and crystallization gave compound 1 together with four known constituents of ginseng, including 20(R)- and 20(S)-protopanaxadiol, and 20(R)- and 20(S)-ginsenoside Rh1. The structure of compound 1 was identified as 10-hydroxy-octadecanoic acid by (1)H- and (13)C-NMR spectra and by EI-MS analysis of the methyl ester of 1. Compound 1 demonstrated much higher transcription activity of PPAR-α than the other isolated compounds. In addition, compound 1 also showed 5.5-fold higher transcription activity of PPAR-γ than vehicle at the dose of 20 μg/mL. In the present study, we identified 10-hydroxy-octadecanoic acid as a dual PPAR-α/γ agonist in FG. Our study suggested that metabolites of fermentation, in addition to ginsenosides, contribute to the health benefits of FG.
journal_name
J Med Foodjournal_title
Journal of medicinal foodauthors
Igami K,Shimojo Y,Ito H,Miyazaki T,Nakano F,Kashiwada Ydoi
10.1089/jmf.2016.3673subject
Has Abstractpub_date
2016-09-01 00:00:00pages
817-22issue
9eissn
1096-620Xissn
1557-7600journal_volume
19pub_type
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