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- W1497181806 abstract "Abstract: Curcumin (diferuloylmethane), a phenolic compound obtained from the rhizome of Curcuma longa, has been found to inhibit cell proliferation in various human cancer cell lines, including non-small cell lung cancer (NSCLC). Thymidine phosphorylase (TP) is considered an attractive therapeutic target, because increased TP expression can suppress cancer cell death induced by DNA-damaging agents. Mitomycin C (MMC), a chemotherapeutic agent used to treat NSCLC, inhibits tumour growth through DNA cross-linking and breaking. Whether MMC can affect TP expression in NSCLC is unknown. Therefore, in this study, we suggested that curcumin enhances the effects of MMC-mediated cytotoxicity by decreasing TP expression and ERK1/2 activation. Exposure of human NSCLC cell lines H1975 and H1650 to curcumin decreased MMC-elicited phosphorylated MKK1/2-ERK1/2 protein levels. Moreover, curcumin significantly decreased MMC-induced TP protein levels by increasing TP mRNA and protein instability. Enhancement of ERK1/2 activation by constitutively active MKK1/2 (MKK1/2-CA) increased TP protein levels and cell viability in curcumin- and MMC-co-treated cells. In contrast, U0126, a MKK1/2 inhibitor, augmented the cytotoxic effect and the down-regulation of TP by curcumin and MMC. Specific inhibition of TP by siRNA significantly enhanced MMC-induced cell death and cell growth inhibition. Our results suggest that suppression of TP expression or administration of curcumin along with MMC may be a novel lung cancer therapeutic modality in the future." @default.
- W1497181806 created "2016-06-24" @default.
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- W1497181806 date "2011-11-04" @default.
- W1497181806 modified "2023-09-24" @default.
- W1497181806 title "Enhancement of Mitomycin C-Induced Cytotoxicity by Curcumin Results from Down-Regulation of MKK1/2-ERK1/2-Mediated Thymidine Phosphorylase Expression" @default.
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- W1497181806 doi "https://doi.org/10.1111/j.1742-7843.2011.00806.x" @default.
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