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KMID : 0379520060220010001
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한국독성학회지
2006 Volume.22 No. 1 p.1 ~ p.8
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Characterization of Pyribenzoxim Metabolizing Enzymes in Rat Liver Microsomes
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Liu Kwang-Hyeon
Moon Joon-Kwan
Seo Jong-Su
Park Byeoung-Soo
Koo Suk-Jin
Lee Hye-Suk
Kim Jeong-Han
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Abstract
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The primary metabolism of pyribenzoxim was studied in rat liver microsomes in order to identify the cytochrome P450 (CYP) isoform(s) and esterases involved in the metabolism of pyribenzoxim. Chemical inhibition using CYP isoform-selective inhibitors such as {alpha}-naphthoflavone, tolbutamide, quinine, chlorzoxazone, troleandomycin, and undecynoic acid indicated that CYP1A and CYP2D are responsible for the oxidative metabolism of pyribenzoxim. And inhibitory studies using eserine, bis-nitrophenol phosphate, dibucaine, and mercuric chloride indicated pyribenzoxim hydrolysis involved in microsomal carboxylesterases containing an SH group (cysteine) at the active center.
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KEYWORD
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Pyribenzoxim, Metabolism, Microsomes, Esterases, Cytochrome P450
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