Phytoestrogens and aromatase
Amongst the phytoestrogens, the flavones and flavo-
nones are the most potent inhibitors of aromatase. Early
studies showed that apigenin and quercetin were potent
inhibitors of aromatase in human placental microsomes
and subsequent studies confirmed apigenin as a relatively
potent inhibitor of the enzyme, along with chrysin,
7-hydroxyflavone, and hesperetin with IC 50s in the order of 0.3–3.0 m M( Le Bail et 1998 a Jeong et al. 1999).Isoflavones were inactive (Le Bail et al. 1998a). In the
human adrenocortical cell line, H295R, flavones were
consistently more potent inhibitors than flavonones with IC 50 values for apigenin, 7-hydroxyflavone, and chrysin ranging from 4 to 20 m M. These values, however, were
between 100 and 1000 times higher than the IC 50 for the steroidal aromatase inhibitor, 4-hydroxyandrostenedione(Sanderson et al.2004). Apigenin was a potent inhibitor
of aromatase activity in primary cultures of human
granulosa cells, significant inhibition being observed at 0.1m M, but only when testosterone was used as the substrate with higher doses being required to inhibit the
Phytoestrogens and aromatase
Amongst the phytoestrogens, the flavones and flavo-
nones are the most potent inhibitors of aromatase. Early
studies showed that apigenin and quercetin were potent
inhibitors of aromatase in human placental microsomes
and subsequent studies confirmed apigenin as a relatively
potent inhibitor of the enzyme, along with chrysin,
7-hydroxyflavone, and hesperetin with IC 50s in the order of 0.3–3.0 m M( Le Bail et 1998 a Jeong et al. 1999).Isoflavones were inactive (Le Bail et al. 1998a). In the
human adrenocortical cell line, H295R, flavones were
consistently more potent inhibitors than flavonones with IC 50 values for apigenin, 7-hydroxyflavone, and chrysin ranging from 4 to 20 m M. These values, however, were
between 100 and 1000 times higher than the IC 50 for the steroidal aromatase inhibitor, 4-hydroxyandrostenedione(Sanderson et al.2004). Apigenin was a potent inhibitor
of aromatase activity in primary cultures of human
granulosa cells, significant inhibition being observed at 0.1m M, but only when testosterone was used as the substrate with higher doses being required to inhibit the
การแปล กรุณารอสักครู่..

Phytoestrogens and aromatase
Amongst the phytoestrogens, the flavones and flavo-
nones are the most potent inhibitors of aromatase. Early
studies showed that apigenin and quercetin were potent
inhibitors of aromatase in human placental microsomes
and subsequent studies confirmed apigenin as a relatively
potent inhibitor of the enzyme, along with chrysin,
7-hydroxyflavone,และ hesperetin กับ IC 50 ในการสั่งซื้อของ 0.3 – 3.0 M ( Le ประกันตัวและปี 1998 จอง et al . 1999 ) คล้ายถูกใช้งาน ( Le ประกันตัว et al . 1998a ) ใน
มนุษย์สายเซลล์ h295r อะดรีโนคอร์ติคัล , มีฤทธิ์ยับยั้งนิลในสูตร
อย่างต่อเนื่องกว่าฟลาโวโนนกับ IC 50 ค่า 7-hydroxyflavone พิจินิน , คริสติน , และตั้งแต่ 4 ถึง 20 เมตร เมตร อย่างไรก็ตาม มี
เหล่านี้ค่าbetween 100 and 1000 times higher than the IC 50 for the steroidal aromatase inhibitor, 4-hydroxyandrostenedione(Sanderson et al.2004). Apigenin was a potent inhibitor
of aromatase activity in primary cultures of human
granulosa cells, significant inhibition being observed at 0.1m M, but only when testosterone was used as the substrate with higher doses being required to inhibit the
การแปล กรุณารอสักครู่..
