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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Cyclohexanol and methylcyclohexanols. A family of inhibitors of hepatic HMGCoA reductase in vivo.

Oral dosing of rats with cyclohexanol and methylcyclohexanols resulted in the inhibition of hepatic HMGCoA reductase. Neither cyclohexane or cyclohexane diols exerted any effects. Inhibition was not due to alcohol dehydrogenase mediated changes in redox state since 3,3',5-trimethylcyclohexanol (TMC), a non substrate for alcohol dehydrogenase, was a potent inhibitor of HMGCoA reductase. Following a single dose of TMC there was no alteration in total hepatic HMGCoA reductase activity for more than 6 hr after which the enzyme activity was depressed in a dose-dependent manner. The normal diurnal rhythm of HMGCoA reductase was reduced in amplitude following TMC administration but the phase was unaltered and the t 1/2 for activity decay following the peak of activity was unaffected. Prior to the inhibitory effect of a TMC dose becoming apparent in total HMGCoA reductase activity we found that the expressed activity of the enzyme (after isolation in F- medium to suppress endogenous protein phosphatase) was depressed by 43%. The inhibitory effect of TMC on total HMGCoA reductase activity seen 8 hr or more after dosing was reflected by inhibition of sterol synthesis in liver measured in vivo after [3H]-H2O administration.[1]


  1. Cyclohexanol and methylcyclohexanols. A family of inhibitors of hepatic HMGCoA reductase in vivo. Miciak, A., White, D.A., Middleton, B. Biochem. Pharmacol. (1986) [Pubmed]
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