CYP19, also known as aromatase, is an enzyme that plays a crucial role in the biosynthesis of estrogens by converting androgens (such as testosterone and androstenedione) into estrogens (such as estradiol and estrone). The activity of CYP19 is significant in various tissues, including the ovaries, testes, adipose tissue, and the brain.
-Estrogen Production: Elevated levels of estrogens, which can result from increased CYP19 activity, are associated with the development and progression of certain cancers, particularly estrogen receptor--positive breast cancer.
-Aromatase Inhibitors: In the treatment of hormone-sensitive breast cancer, aromatase inhibitors (such as anastrozole, letrozole, and exemestane) are commonly used. These drugs work by inhibiting the activity of CYP19, thereby reducing estrogen levels and slowing the growth of estrogen-dependent tumors.
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