PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 10801247-1 2000 BACKGROUND: Tangeretin is a flavonoid that stimulates the catalytic activity of cytochrome P450 3A4 (CYP3A4) and is found in high levels in tangerine juice. tangeretin 12-22 cytochrome P450 family 3 subfamily A member 4 Homo sapiens 101-107 10801247-2 2000 METHODS: The effect of tangeretin on hydroxylation of midazolam, a CYP3A4 probe, was examined in vitro with human liver microsomes and recombinant CYP3A4. tangeretin 23-33 cytochrome P450 family 3 subfamily A member 4 Homo sapiens 67-73 10801247-5 2000 In complementary deoxyribonucleic acid-expressed CYP3A4, a 52% stimulation of midazolam 1"-hydroxylation was reached at 50 micromol/L tangeretin with no effect on midazolam 4-hydroxylation. tangeretin 134-144 cytochrome P450 family 3 subfamily A member 4 Homo sapiens 49-55 10801247-9 2000 CONCLUSION: Tangeretin is a potent regioselective stimulator of midazolam 1"-hydroxylation by human liver microsomes and complementary deoxyribonucleic acid-expressed CYP3A4. tangeretin 12-22 cytochrome P450 family 3 subfamily A member 4 Homo sapiens 167-173