Title : The role of small-intestinal P450 enzymes in protection against systemic exposure of orally administered benzo[a]pyrene.

Pub. Date : 2010 Jul

PMID : 20400470






3 Functional Relationships(s)
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1 In addition, we observed greater differences in the rates of clearance of oral BaP, between WT and IE-Cpr-null mice, in mice pretreated with beta-naphthoflavone, to induce CYP1A1 expression, than in untreated mice. Benzo(a)pyrene cytochrome P450, family 1, subfamily a, polypeptide 1 Mus musculus
2 The onset of induction (at 2 h after dosing) of CYP1A1 protein expression by oral BaP administration was earlier in the SI than in extra-gut organs analyzed; for liver, lung, and kidney, induction was not observed until 4 h after dosing. Benzo(a)pyrene cytochrome P450, family 1, subfamily a, polypeptide 1 Mus musculus
3 Taken together, these findings strongly support the concept that small-intestinal CYP1A1 induction is a critical factor in protection against systemic exposure to oral BaP. Benzo(a)pyrene cytochrome P450, family 1, subfamily a, polypeptide 1 Mus musculus