Title : Mechanisms of CYP3A Induction During Pregnancy: Studies in HepaRG Cells.

Pub. Date : 2019 Mar 27

PMID : 30919109






6 Functional Relationships(s)
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1 To determine the mechanism(s) by which cortisol induces CYP3A activity, HepaRG cells were pre-incubated in dexamethasone-free medium and then incubated for 72 h with cortisol (798 nM). Hydrocortisone cytochrome P450 family 3 subfamily A member 4 Homo sapiens
2 To determine the mechanism(s) by which cortisol induces CYP3A activity, HepaRG cells were pre-incubated in dexamethasone-free medium and then incubated for 72 h with cortisol (798 nM). Hydrocortisone cytochrome P450 family 3 subfamily A member 4 Homo sapiens
3 CYP3A4, and not CYP3A5, was found to be the dominant contributor to total CYP3A activity in control- and cortisol-treated HepaRG cells. Hydrocortisone cytochrome P450 family 3 subfamily A member 4 Homo sapiens
4 CYP3A4, and not CYP3A5, was found to be the dominant contributor to total CYP3A activity in control- and cortisol-treated HepaRG cells. Hydrocortisone cytochrome P450 family 3 subfamily A member 4 Homo sapiens
5 Cortisol-mediated CYP3A4 induction in HepaRG cells was primarily mediated by GR-dependent PXR induction pathway and to a smaller extent via a PXR-independent pathway. Hydrocortisone cytochrome P450 family 3 subfamily A member 4 Homo sapiens
6 These data indicate that PXR plays a central role in cortisol-mediated induction of CYP3A activity during pregnancy and suggests that other enzymes and transporters, such as CYP2B6 and P-glycoprotein, may also be induced during pregnancy via the same mechanism(s). Hydrocortisone cytochrome P450 family 3 subfamily A member 4 Homo sapiens