Cytochrome P450 17A1 is an enzyme of the hydroxylase type that in humans is encoded by the CYP17A1 gene on chromosome 10.
CYP17A1 is critically important in the treatment of castration resistant prostate cancer, for which the CYP17A1 inhibitor abiraterone has proven a highly effective drug. However, CYP17A1 inhibition is also being investigated for the treatment of breast cancer.
Elevated CYP17A1 levels have been observed in cancer, and its expression may correlate with tumor aggressiveness and patient survival.
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