TY - JOUR
T1 - Danazol inhibits cytochrome P450 2J2 activity in a substrateindependent manner
AU - Lee, Eunyoung
AU - Wu, Zhexue
AU - Shon, Jong Cheol
AU - Liu, Kwang Hyeon
N1 - Publisher Copyright:
Copyright ©2015 by The American Society for Pharmacology and Experimental Therapeutics.
PY - 2015/8/1
Y1 - 2015/8/1
N2 - Cytochrome P450 2J2 (CYP2J2) is an enzyme responsible for the metabolism of endogenous substrates including arachidonic acid, as well as therapeutic drugs such as albendazole, astemizole, ebastine, and terfenadine. Selective inhibitors of CYP2J2 are essential for P450 reaction phenotyping studies. To find representative CYP2J2 index inhibitors, we evaluated the inhibitory potential of danazol, hydroxyebastine, telmisartan, and terfenadone against CYP2J2 activity for four representative CYP2J2 substrates (albendazole, astemizole, ebastine, and terfenadine) using recombinant CYP2J2. Of these four CYP2J2 inhibitors, danazol strongly inhibited CYP2J2- mediated albendazole, astemizole, ebastine, and terfenadine metabolism in a substrate-independent manner, with IC50 values of 0.05, 0.07, 0.18, and 0.34 μM, respectively. Danazol noncompetitively inhibited CYP2J2-mediated astemizole O-demethylation activities with a Ki value of 0.06 μM. Terfenadone strongly inhibited CYP2J2- mediated albendazole, astemizole, and terfenadine metabolism (IC50 < 0.21 μM), whereas it showed weak inhibition against CYP2J2- catalyzed ebastine hydroxylase activity (IC50 = 6.04 μM). Telmisartan had no inhibitory effect on CYP2J2-mediated ebastine and terfenadine hydroxylation (IC50> 20 μM). Taken together, these data suggest that danazol may be used as a CYP2J2 index inhibitor in reaction phenotyping studies.
AB - Cytochrome P450 2J2 (CYP2J2) is an enzyme responsible for the metabolism of endogenous substrates including arachidonic acid, as well as therapeutic drugs such as albendazole, astemizole, ebastine, and terfenadine. Selective inhibitors of CYP2J2 are essential for P450 reaction phenotyping studies. To find representative CYP2J2 index inhibitors, we evaluated the inhibitory potential of danazol, hydroxyebastine, telmisartan, and terfenadone against CYP2J2 activity for four representative CYP2J2 substrates (albendazole, astemizole, ebastine, and terfenadine) using recombinant CYP2J2. Of these four CYP2J2 inhibitors, danazol strongly inhibited CYP2J2- mediated albendazole, astemizole, ebastine, and terfenadine metabolism in a substrate-independent manner, with IC50 values of 0.05, 0.07, 0.18, and 0.34 μM, respectively. Danazol noncompetitively inhibited CYP2J2-mediated astemizole O-demethylation activities with a Ki value of 0.06 μM. Terfenadone strongly inhibited CYP2J2- mediated albendazole, astemizole, and terfenadine metabolism (IC50 < 0.21 μM), whereas it showed weak inhibition against CYP2J2- catalyzed ebastine hydroxylase activity (IC50 = 6.04 μM). Telmisartan had no inhibitory effect on CYP2J2-mediated ebastine and terfenadine hydroxylation (IC50> 20 μM). Taken together, these data suggest that danazol may be used as a CYP2J2 index inhibitor in reaction phenotyping studies.
UR - http://www.scopus.com/inward/record.url?scp=84940396481&partnerID=8YFLogxK
U2 - 10.1124/dmd.115.064345
DO - 10.1124/dmd.115.064345
M3 - Article
C2 - 26048912
AN - SCOPUS:84940396481
SN - 0090-9556
VL - 43
SP - 1250
EP - 1253
JO - Drug Metabolism and Disposition
JF - Drug Metabolism and Disposition
IS - 8
ER -