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Antiestrogens include selective estrogen receptor modulators (SERMs) like tamoxifen, clomifene, and raloxifene, the ER silent antagonist and selective estrogen receptor degrader (SERD) fulvestrant, [6] [7] aromatase inhibitors (AIs) like anastrozole, and antigonadotropins including androgens/anabolic steroids, progestogens, and GnRH analogues.
4-Androstenedione for comparison. 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 ...
Steroidal aromatase inhibitors are a class of drugs that are mostly used for treating breast cancer in postmenopausal women. High levels of estrogen in breast tissue increases the risk of developing breast cancer and the enzyme aromatase is considered to be a good therapeutic target when treating breast cancer due to it being involved in the final step of estrogen biosynthetic pathway and also ...
Scientists have found that the hormone therapy - called anastrozole - can p revent women from developing breast cancer and that the protective effect lasts for years after the treatment has ended.
Aromatase inhibitors, which stop the production of estrogen in postmenopausal women, have become useful in the management of patients with breast cancer whose lesion was found to be estrogen receptor positive. [33] Inhibitors that are in current clinical use include anastrozole, exemestane, and letrozole.
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 ...
Letrozole and anastrozole are aromatase inhibitors which have been shown to be superior to tamoxifen for the first-line treatment of breast cancer in postmenopausal women. [1] Exemestane is an irreversible "aromatase inactivator" which is superior to megestrol acetate for treatment of tamoxifen-refractory metastatic breast cancer, and does not ...
Anastrozole was patented in 1987 and was approved for medical use in 1995. [8] [9] It is on the World Health Organization's List of Essential Medicines. [10] Anastrozole is available as a generic medication. [7] In 2022, it was the 179th most commonly prescribed medication in the United States, with more than 2 million prescriptions. [11] [12]