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- W2076960247 abstract "It has been proposed that a ring-opened form may be responsible for the toxicity of benzene. The present studies demonstrate that incubation of [14C]benzene with liver microsomes (obtained from male CD-1 mice treated with benzene) in the presence of NADPH results in the formation of a ring-opened product. Evidence for the identity of this product was obtained by derivatizing with 2-thiobarbituric acid (TBA), which resulted in the formation of an adduct with a 490-nm absorbance maximum. This maximum is identical to that observed after authentic trans,trans-muconaldehyde has reacted with TBA. Separation of muconaldehyde, both with and without trapping with TBA, from other benzene metabolites in the incubation mixture was accomplished by HPLC. The radioactivity profile of fractions collected during HPLC analysis contained peaks that eluted with muconaldehyde and the muconaldehyde-TBA adduct. The structure of the ring-opened product was confirmed by mass spectrometry, studies in which the HPLC peak from the microsomal incubation mixture that eluted at the retention time of authentic muconaldehyde was collected and derivatized with 2,4-dinitrophenylhydrazine. The high-resolution mass spectrum of this sample contained an ion with an m/z of 291.0729, corresponding to muconaldehyde mono-dinitrophenylhydrazone. These results indicate that benzene is metabolized in vitro to a ring-opened product identified as muconaldehyde." @default.
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- W2076960247 date "1986-11-01" @default.
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- W2076960247 title "Formation of muconaldehyde, an open-ring metabolite of benzene, in mouse liver microsomes: an additional pathway for toxic metabolites." @default.
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- W2076960247 doi "https://doi.org/10.1073/pnas.83.21.8356" @default.
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