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cytochrome P450

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CYP11A1

A gene on chromosome 15q23-q24 that encodes a member of the cytochrome P450 superfamily of enzymes, which catalyse reactions involved in drug metabolism and synthesis of cholesterol, steroids and other lipids. CYP11A1 localises to the mitochondrial inner membrane and catalyses the conversion of cholesterol to pregnenolone, the first and rate-limiting step in the synthesis of the steroid hormones.
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cytochrome P450

A family of enzymes responsible for the detoxification and elimination of foreign substances including many drugs by hydroxylation and increasing their solubility. The group has been intensively studied because mutations of the cytochrome P450 gene have been found to be associated with a number of diseases including Addison's disease, liver cancer and Parkinson's disease. Cytochrome P450 can also interfere with drug treatment. Selective inhibitors of aromatase-specific cytochrome P450 have been developed to assist in the treatment of breast cancer.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
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References in periodicals archive
The elucidation of cytochrome P450 family 1-specific activities at a molecular level is of great importance with regard to novel and potent drug design and drug-drug interactions.
(Cytochrome P450 aromatase 1b)###3'-CGGGTCTCCAGAAATCGGTAGA-5'
The Role of Cytochrome P450 3A5 Enzyme on the Metabolism of Tacrolimus in Rats.
Potential of decursin to inhibit the human cytochrome P450 2J2 isoform.
Inhibition of human cytochrome P450 activities by kava extract and kavalactones.
3-3) Physicochemical and catalytic properties of partially purified steroid hydroxylating enzyme, cytochrome P450. Figure 2 shows the absolute absorption spectra of our partially purified P450 from bovine adrenocortical mitochondria under various conditions.
Knowing that valproic acid is extensively processed by cytochrome P450 enzymes, the research team added a cytochrome P450 inhibitor to mouse and human liver cells and found that AMPK was no longer activated.
The clinical implications of cytochrome P450 interactions with opioids and strategies for pain management.
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