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- W2016207943 abstract "Conjugated linoleic acid (CLA), found in dairy products, in beef and lamb has been demonstrated to possess anticancer properties protecting several tissues from developing cancer. Moreover, it has been shown to modulate apoptosis in several cancer cell lines. The aim of this study was to investigate which signaling transduction pathways were modulated in CLA-induced apoptosis in human hepatoma SK-HEP-1 cells. The cells exposed to CLA were evaluated for PPARα, PP2A, pro-apoptotic proteins Bak, Bad and caspases, and anti-apoptotic proteins Bcl-2 and Bcl-XL. Cells were also treated with okadaic acid, a PP2A inhibitor, or with Wy-14643, a specific PPARα agonist. The CLA-induced apoptosis was concomitant to the increase of percentage of cells in the S phase, PPARα, PP2A and pro-apoptotic proteins; simultaneously, antiapoptotic proteins decreased. Inhibition of PP2A prevented apoptosis, and PPARα agonist showed similar effect as CLA. The increased PP2A could be responsible for the dephosphorylation of Bcl-2 and Bad, permitting apoptotic activity of Bax and Bad. The increase of caspase 8 and 9 suggested that both the intrinsic and extrinsic apoptotic pathways were induced. PP2A was probably increased by PPARα, since putative PPRE sequences were found in genes encoding its subunits. In conclusion, CLA induces apoptosis in human hepatoma SK-HEP-1 cells, by increasing PPARα, PP2A and pro-apoptotic proteins. © 2007 Wiley-Liss, Inc." @default.
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- W2016207943 date "2007-01-01" @default.
- W2016207943 modified "2023-09-24" @default.
- W2016207943 title "PPARα and PP2A are involved in the proapoptotic effect of conjugated linoleic acid on human hepatoma cell line SK-HEP-1" @default.
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- W2016207943 doi "https://doi.org/10.1002/ijc.23004" @default.
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