Title : ERα phenotype, estrogen level, and benzo[a]pyrene exposure modulate tumor growth and metabolism of lung adenocarcinoma cells.

Pub. Date : 2012 Mar

PMID : 21920623






4 Functional Relationships(s)
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1 The high CYP1B1/CYP1A1 and low COMT/CYP1B1 expression ratios detected in ERalpha(+) tumors suggested an accumulation of 4-hydroxyestradiol metabolite under high body estrogen, whereas comparable CYP1A1 and CYP1B1 expression plus estrogen-inducible COMT expression might favor the formation of 2-methoxyestradiol in ERalpha(-) tumors. 4-hydroxyestradiol cytochrome P450 family 1 subfamily B member 1 Homo sapiens
2 The high CYP1B1/CYP1A1 and low COMT/CYP1B1 expression ratios detected in ERalpha(+) tumors suggested an accumulation of 4-hydroxyestradiol metabolite under high body estrogen, whereas comparable CYP1A1 and CYP1B1 expression plus estrogen-inducible COMT expression might favor the formation of 2-methoxyestradiol in ERalpha(-) tumors. 4-hydroxyestradiol cytochrome P450 family 1 subfamily B member 1 Homo sapiens
3 The high CYP1B1/CYP1A1 and low COMT/CYP1B1 expression ratios detected in ERalpha(+) tumors suggested an accumulation of 4-hydroxyestradiol metabolite under high body estrogen, whereas comparable CYP1A1 and CYP1B1 expression plus estrogen-inducible COMT expression might favor the formation of 2-methoxyestradiol in ERalpha(-) tumors. 4-hydroxyestradiol cytochrome P450 family 1 subfamily B member 1 Homo sapiens
4 Benzo[a]pyrene increased expression of CYP1B1 over CYP1A1 and suppressed estrogen-induced COMT up-regulation in ERalpha(-) tumor cells, probably switching estrogen metabolism to 4-hydroxyestradiol formation and removing the inhibition of 2-methoxyestradiol on ERalpha(-) tumors. 4-hydroxyestradiol cytochrome P450 family 1 subfamily B member 1 Homo sapiens