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Inhibitory Effect of a Drug Metabolizing Enzyme CYP3A4 on Spices  

Cha, Bae-Cheon (Department of Bio-industry and technology, Sangji University)
Publication Information
Korean Journal of Pharmacognosy / v.34, no.1, 2003 , pp. 86-90 More about this Journal
Abstract
For the determination of inhibiting cytochrome P450(CYP)3A4 activity, an improvement HPLC method was established by using a new internal standard and solvent system. Moreover, CYP3A4 amount for a optimum reaction of enzyme was determined by a comparative study with a variety concentration of enzyme. Using a established method, inhibitory effect of CYP3A4 that is drug metabolizing enzyme Investigated on EtOAc extracts of 5-class spices. As a result of experiment, EtOAc extract of white pepper (Piper nigrum L.) showed strong inhibitory activity. On a continuous experiment, the fraction 2, 4 and 5 of while pepper extract showed remarkable inhibitory activity. Pipeline, a main constituent of pepper was not included in these fraction. It is suggested that major compounds for the inhibitory activity of white pepper may be other ingredient that is not piperine.
Keywords
Cytochrome P450(CYP)3A4; a drug metabolizing enzyme; spices; white pepper; HPLC method;
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