Title : Aryl hydrocarbon receptor-dependent induction of flavin-containing monooxygenase mRNAs in mouse liver.

Pub. Date : 2008 Dec

PMID : 18765683






6 Functional Relationships(s)
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1 Our recent microarray studies revealed induction of FMO2 and FMO3 mRNAs by 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) in liver of mice with wild-type aryl hydrocarbon receptor (AHR) but not in Ahr-null mice. Polychlorinated Dibenzodioxins flavin containing monooxygenase 3 Mus musculus
2 Our recent microarray studies revealed induction of FMO2 and FMO3 mRNAs by 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) in liver of mice with wild-type aryl hydrocarbon receptor (AHR) but not in Ahr-null mice. Polychlorinated Dibenzodioxins flavin containing monooxygenase 3 Mus musculus
3 In adult female mice basal FMO3 mRNA is high and was not induced at 4 h but was elevated 8-fold at 24 h. FMO5 mRNA was significantly down-regulated by TCDD in both male and female adult mice. Polychlorinated Dibenzodioxins flavin containing monooxygenase 3 Mus musculus
4 Juvenile mice show no sex difference in response to TCDD; FMO3 was induced 4 to 6-fold by TCDD in both sexes. Polychlorinated Dibenzodioxins flavin containing monooxygenase 3 Mus musculus
5 Chromatin immunoprecipitation demonstrated recruitment of AHR and aryl hydrocarbon nuclear translocator proteins to Fmo3 regulatory regions, suggesting that induction by TCDD is a primary AHR-mediated event. Polychlorinated Dibenzodioxins flavin containing monooxygenase 3 Mus musculus
6 Although FMO2 and FMO3 mRNAs were highly induced by TCDD in adult males, overall FMO catalytic activity increased only modestly. Polychlorinated Dibenzodioxins flavin containing monooxygenase 3 Mus musculus