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- W2000793531 abstract "Many phytochemicals possess anti-oxidant and cancer-preventive properties, some putatively through phase II metabolism-mediated mutagen/oxidant quenching. However, in studies to date, most candidate agents are not active in human lung cells. In vitro and in vivo screening studies for discovery are clearly needed for new, more potent chemopreventive agents for lung cancer. Here we applied an mRNA-specific gene expression-based high-throughout screening approach to identify phytochemical inducers of phase II metabolism enzymes GSTP1 and NQO1 in primary normal human bronchial epithelial (NHBE) cells and immortalized human bronchial epithelial cells (HBEC). We have screened 800 compounds in the MicroSource Natural Products Library for inducers of GSTP1 and NQO1 expression, and identified 2, 3-dihydroxy-4-methoxy-4′-ethoxybenzophenone, triacetylresveratrol, ivermectin, sanguinarine sulfate, and daunorubicin as new inducers for GSTP1 and NQO1 mRNA expression. Consistent with this effect, the induction of NQO1 protein expression by immunoblot was found for all these agents in both HBEC and NHBE cells at the same concentration that induced NQO1 mRNA expression. However, GSTP1 protein expression did not significantly change with any selected agents. Proliferation/viability assays showed that HBEC and NHBE were significantly inhibited by ivermectin, sanguinarine sulfate, and daunorubicin. These data demonstrate the feasibility of high-throughput screening for inducers of NQO1. Moreover, the data identify 2, 3-dihydroxy-4-methoxy-4′-ethoxybenzophenone and triacetylresveratrol as the most potent and low toxicity inducers [≥3-6-fold, at the protein level], implying they are potential new agents for further in vitro and preclinical in vivo testing for prevention of oxidant-related disease. Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 101st Annual Meeting of the American Association for Cancer Research; 2010 Apr 17-21; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2010;70(8 Suppl):Abstract nr 5706." @default.
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- W2000793531 date "2010-04-15" @default.
- W2000793531 modified "2023-09-25" @default.
- W2000793531 title "Abstract 5706: High-throughout library screening identifies phytochemical inducers of phase II metabolism enzymesGSTP1andNQO1in human lung cells" @default.
- W2000793531 doi "https://doi.org/10.1158/1538-7445.am10-5706" @default.
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