Search results
Results From The WOW.Com Content Network
Exemestane is known chemically as 6-methylideneandrosta-1,4-diene-3,17-dione. Like the aromatase inhibitors formestane and atamestane, exemestane is a steroid that is structurally similar to 4-androstenedione, the natural substrate of aromatase. It is distinguished from the natural substance only by the methylidene group in position 6 and an ...
Exemestane went through clinical trials in the 1990s and received FDA approval in 1999, marketed as Aromasin. Indication for exemestane is advanced breast cancer in postmenopausal women, where the cancer has progressed following tamoxifen therapy. Exemestane is the first oral aromatase inactivator. [5]
Aromatase (EC 1.14.14.14), also called estrogen synthetase or estrogen synthase, is an enzyme responsible for a key step in the biosynthesis of estrogens. It is CYP19A1 , a member of the cytochrome P450 superfamily, which are monooxygenases that catalyze many reactions involved in steroidogenesis .
Ovarian stimulation with the aromatase inhibitor letrozole has been proposed for ovulation induction in order to treat unexplained female infertility. In a multi-center study funded by the National Institute of Child Health and Development, ovarian stimulation with letrozole resulted in a significantly lower frequency of multiple gestation (i.e., twins or triplets) but also a lower frequency ...
Chemical structure of the endogenous androstenedione. In the human body, the enzyme aromatase converts androstenedione to estrogen. Aromatase is an enzyme that belongs to the cytochrome P450 family located on chromosome 15. In the human body, the aromatase consists of 10 β-strands (1 major sheet and 3 minor sheets) and 12 α-helixes.
Estrogen deprivation therapy, also known as endocrine therapy, is a form of hormone therapy that is used in the treatment of breast cancer.Modalities include antiestrogens or estrogen blockers such as selective estrogen receptor modulators (SERMs) such as tamoxifen, selective estrogen receptor degraders such as fulvestrant, and aromatase inhibitors such as anastrozole and ovariectomy.
Aromatase inhibitors like exemestane (which forms a permanent and deactivating bond with the aromatase enzyme) [7] and anastrozole and letrozole (which compete for the enzyme) [8] have been shown to be more effective than anti-estrogen medications such as tamoxifen likely because they prevent the formation of estradiol. [6]
This page was last edited on 18 September 2023, at 00:24 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.