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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 ...
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 ...
Letrozole, sold under the brand name Femara among others, is an aromatase inhibitor medication that is used in the treatment of breast cancer for post-menopausal women. [ 1 ] It was patented in 1986 and approved for medical use in 1996. [ 4 ]
Two months later, I underwent a unilateral mastectomy and post-op began a 10-year adjuvant treatment: a daily medication, Letrozole, to wipe out all the estrogen in my body, and quarterly Lupron ...
Letrozole Exemestane is an irreversible "aromatase inactivator" which is superior to megestrol acetate for treatment of tamoxifen -refractory metastatic breast cancer, and does not appear to have the osteoporosis -promoting side effects of other drugs in this class.
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 has a 1,2,4 triazole ring which is important for binding with Fe 2+ in the heme moiety of the aromatase enzyme. Also, the cyano benzyl moiety is significant because it partly imitates the steroid backbone of the natural hormone androstenedione.
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