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1,4,6-Androstatriene-3,17-dione (ATD) is a potent irreversible aromatase inhibitor that inhibits estrogen biosynthesis by permanently binding and inactivating aromatase in adipose and peripheral tissue. [1] It is used to control estrogen synthesis. [2]
Aromatase inhibitors (AIs) are a class of drugs used in the treatment of breast cancer in postmenopausal women and in men, [1] [2] and gynecomastia in men. They may also be used off-label to reduce estrogen conversion when supplementing testosterone exogenously. They may also be used for chemoprevention in women at high risk for breast cancer.
Type II aromatase inhibitors such as anastrozole and letrozole, by contrast, are not steroids and work by interfering with the aromatase's heme. [11] A study conducted on young adult males found that the estrogen suppression rate for exemestane varied from 35% for estradiol (E2) to 70% for estrone (E1). [13
[11] [4] In addition, it is described as a much more potent aromatase inhibitor than adrenal steroidogenesis inhibitor. [17] AG can inhibit aromatase by 74 to 92% and decrease circulating estradiol levels by 58 to 76% in men and postmenopausal women. [1] [7] AG is not an effective ovarian steroidogenesis inhibitor in premenopausal women. [17]
Aromatase in fat and muscle can circulate estrogen in postmenopausal women. [12] Aromatase in highly estrogen-sensitive tissues, such as the breast, uterus, vagina, bone, and blood vessels, provides estrogen locally, so aromatase inhibitors work by reducing this estrogen production. [12]
Women 60 years old and over share their workout tips for building strength and muscle in the gym.
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