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• W2024193846 abstract "Glycerol can be oxidized to formaldehyde by rat liver microsomes and by cytochrome P450. The ability of other alcohols to be oxidized to formaldehyde was determined to evaluate the structural determinants of the alcohol which eventually lead to this production of formaldehyde. Monohydroxylated alcohols such as 1- or 2-propanol did not produce formaldehyde when incubated with NADPH and microsomes. Geminal diols such as 1,3-propanediol, 1,3-butanediol, or 1,4-butanediol also did not yield formaldehyde. However, vicinal diols such as 1,2-propanediol or 1,2-butanediol produced formaldehyde. With 1,2-propanediol, the residual two-carbon fragment was found to be acetaldehyde, while with 1,2-butanediol, the residual three-carbon fragment was propionaldehyde. Oxidation of 1,2-propanediol to formaldehyde plus acetaldehyde involved interaction with an oxidant derived from H2O2 plus nonheme iron, since production of the two aldehydic products was completely prevented by catalase or glutathione plus glutathione peroxidase and by chelators such as desferrioxamine or EDTA. The oxidant was not superoxide or hydroxyl radical. Product formation was fivefold lower when NADH replaced NADPH, and was inhibited by substrates, ligands, and inhibitors of cytochrome P450. A charged glycol such as alpha-glycerophosphate (but not the geminal beta-glycerophosphate) was readily oxidized to formaldehyde, suggesting that interaction of the glycol with the oxidant was occurring in solution and not in a hydrophobic environment. These results indicate that the carbon-carbon bond between 1,2-glycols can be cleaved by an oxidant derived from microsomal generated H2O2 and reduction of non-heme iron, with the subsequent production of formaldehyde plus an aldehyde with one less carbon than the initial glycol substrate." @default.
• W2024193846 created "2016-06-24" @default.
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• W2024193846 date "1992-10-01" @default.
• W2024193846 modified "2023-10-14" @default.
• W2024193846 title "Structural determinants for alcohol substrates to be oxidized to formaldehyde by rat liver microsomes" @default.
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• W2024193846 doi "https://doi.org/10.1016/0003-9861(92)90100-b" @default.
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