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Abstract
Peripheral neuropathies caused by exposures to the industrial solvents n-hexane and MBK exhibit strinkingly similar characteristics. In in vivo studies, the metabolites of MBK and n-hexane identified in blood and urine of guinea pigs were 2-hexanol (partly as glucuronide in urine); and 2,5-hexanedione which was detected only in MBK treated groups. Phenobarbital pretreatment increased 2-hexanol urinary excretion in both solvent treatment groups. In in vitro studies, hepatic reduction of MBK required the cytosol fraction to form 2-hexanol; whereas the oxidation of MBK and n-hexane required the microsomal fraction to form 2,5-hexanedione and 2-hexanol, respectively. The in vivo and in vitro biotransformation of MBK and n-hexane to a common metabolite (2-hexanol) suggests that the neurotoxic action of these solvents may be metabolite related.
Published Version
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