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• W2010280070 abstract "The inhibitory influence of bovine lactoferrin (bLF) on induction of preneoplastic hepatic glutathione S-transferase placental form-positive (GST-P( +)) cell foci and colon aberrant crypt foci (ACF) by diethylnitrosamine (DEN) and 2-amino-3,8-dimethylimidazo[4,5-f]quinoxaline (MeIQx) was investigated in F344 rats. Rats were initially treated with DEN, then placed on basal diet containing MeIQx (200 ppm) alone, MeIQx plus 2% bLF, or MeIQx plus 0.2% bLF from week 2 to week 8, with partial hepatectomy performed at week 3. Concomitant administration of 2% or 0.2% bLF with MeIQx caused significant dose-dependent decreases in both number and unit area of GST-P(+) cell foci (2% bLF, P < 0.001; 0.2% bLF, P < 0.01). Similar results were observed for MeIQx-induced colon ACF in the groups without DEN treatment (2% and 0.2% bLF, P < 0.05). To investigate the underlying mechanisms, we analyzed the influence of bLF on levels of cytochrome P4501A2 (CYP1A2), a metabolically activating enzyme of MeIQx in the liver. The results demonstrated that combined administration of 2% bLF significantly reduced levels of MeIQx-induced CYP1A2 mRNA (P < 0.05) and protein (P < 0.05) to the normal levels, in association with reduced values for MeIQx-DNA adducts (P < 0.05), liver GST-P(+) cell foci and colon ACF. These results suggest that bLF is a chemopreventive agent for DEN alone or DEN plus MeIQx-induced liver, and MeIQx-induced colon carcinogenesis in rats. One possible mechanism is a normalizing down-regulation of CYP1A2 expression by bLF, with consequent reduction of carcinogen activation and adduct formation." @default.
• W2010280070 created "2016-06-24" @default.
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• W2010280070 date "2002-06-01" @default.
• W2010280070 modified "2023-09-27" @default.
• W2010280070 title "Down-regulation of 2-Amino-3,8-dimethylimidazo[4,5-f]quinoxaline (MeIQx)-induced CYP1A2 Expression Is Associated with Bovine Lactoferrin Inhibition of MeIQx-induced Liver and Colon Carcinogenesis in Rats" @default.
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• W2010280070 doi "https://doi.org/10.1111/j.1349-7006.2002.tb01299.x" @default.
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