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Cytochrome P450 (CYP) 3A4, which is abundant in human liver and small intestine and participates in the metabolism of various drugs and xenochemicals, is known to be induced by 1,25-dihydroxyvitamin D 3 (1,25(OH) 2 D 3 ) in the colon carcinoma cell line Caco-2 cells. Nitric oxide (NO) is able to inhibit CYP3A4 expression and catalytic activity. In this study, we investigated...
Heme oxygenase-1 (HO-1) is induced under various oxidative stress conditions, such as lipopolysaccharide (LPS) insult. Induction of HO-1 by LPS is reported to be mediated through interleukin-1β (IL-1β), rather than other inflammatory cytokines in the mouse liver. However, we found that IL-1α/β knockout (KO) mice responded well to LPS insult, as did wild-type mice with respect to HO-1 mRNA induction...
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