Why study the cytochrome P4503A (CYP3A) family?

Published on October 1, 2007 Reviewed on August 11, 2015   52 min

Other Talks in the Series: Drug Metabolizing Enzymes

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Why study the Cytochrome P4503A family, also known as the CYP3As?
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First, The CYP3A family is the most abundant CYP in human liver. When a bank of human livers was immuno-quantitated for the amounts of the major CYPs, CYP3A was found to represent on average about 30 percent of total hepatic P450, making it the dominant CYP in this tissue.
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Secondly, not only is CYP3A the most abundant hepatic CYP, but a survey of drug reactions demonstrated that CYP3As catalyzed the metabolism of approximately 50 percent of all drugs in clinical use. Thus, based on these criteria, it could be argued that CYP3A is the most important CYP in human liver.
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Why study the cytochrome P4503A (CYP3A) family?

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