DT-diaphorase-like quinone reductase in rat plasma
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Updated: Oct 19, 2026

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Published on: May 4, 2018
S Kitamura1, A Terada, H Kamio
1Institute of Pharmaceutical Science, Hiroshima University School of Medicine, Japan.
Abstract:
The present study provides the evidence that DT-diaphorase-like quinone reductase exists in rat plasma. The quinone reductase activity toward menadione was found in rat plasma in the presence of NADH or NADPH. The enzyme activity was induced by pretreatment with 3-methylcholanthrene, but was not affected by phenobarbital. The 3-methylcholanthrene-induced quinone reductase activity was separated into three fractions (F1, F2, and F3) by gel filtration, which showed NAD(P)H-linked, NADH-linked, and NAD(P)H-linked activities, respectively. F1, which was induced by 3-methylcholanthrene, was inhibited by dicumarol, and cross-reacted with rat liver DT-diaphorase antibody.
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