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標題: Gallic acid induces apoptosis in 3T3-L1 pre-adipocytes via a fas- and mitochondrial-mediated pathway
作者: Hsu, C.L.
Lo, W.H.
Yen, G.C.
關鍵字: gallic acid;apoptosis;3T3-L1 pre-adipocytes;histone deacetylase inhibitors;cancer cells;gene family;obesity;proliferation;chemotherapy;mechanisms;flavonoids;induction;toxicity
Project: Journal of Agricultural and Food Chemistry
期刊/報告no:: Journal of Agricultural and Food Chemistry, Volume 55, Issue 18, Page(s) 7359-7365.
Gallic acid (3,4,5-trihydroxybenzoic acid) is a naturally abundant plant phenolic compound. Our previous studies have shown that some phenolic acids such as gallic acid inhibit cell growth and induce apoptosis in 3T3-L1 pre-adipocytes. However, the molecular mechanism of gallic acid in the induction of cell apoptosis is still unclear. In this study, we investigated the effect of gallic acid on the apoptotic pathway in 3T3-L1 pre-adipocytes. Western blot data revealed that gallic acid stimulated an increase in the protein expression of Fas, FasL, and p53. The ratio of expression levels of pro-and anti-apoptotic Bcl-2 family members was changed by gallic acid treatment. Gallic acid released mitochondrial cytochrome c into the cytosol and subsequently induced the activation of caspase-9 and caspase-3, which were followed by the cleavage of poly(ADP-ribose) polymerase. Pretreatment with a general caspase-9 inhibitor (Z-LEHD-FMK) and caspase-3 inhibitor (Z-DEVD-FMK) prevented gallic acid from inhibiting cell viability in 3T3-L1 pre-adipocytes. The data also indicated that treatment with gallic acid inhibited histone cleacetylase activity in 3T3-L1 pre-adipocytes. These results demonstrate that gallic acid induces apoptosis in 3T3-L1 pre-adipocytes through the Fas and mitochondrial pathway. The induction of cell apoptosis by gallic acid may prove to be a pivotal mechanism for decreased pre-adipocyte proliferation.
ISSN: 0021-8561
DOI: 10.1021/jf071223c
Appears in Collections:食品暨應用生物科技學系

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