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• W1996855717 endingPage "342" @default.
• W1996855717 startingPage "319" @default.
• W1996855717 abstract "Tetrahydrofuran (THF) is a widely used solvent in industry and research. THF is a weak toxin, with approximate acute LD50s in the range of 2 to 3 g/kg, 8 to 20 mg/L, and 800 mg/kg following oral, inhalation, and i.v. routes, respectively. The two primary signs of intoxication are narcosis and hepatocellular dysfunction, both occurring at doses of approximately one-half of the lethal dose. Little is known concerning the pharmacokinetics of THF. No evidence exists for genotoxicity due to THF. Ongoing carcinogenicity bioassay tests sponsored by the National Toxicology Program have not yet been completed. Two significant interactions of THF with cellular components have been studied; first, THF inhibits a number of enzymatic reactions at concentrations ranging from 10 to 100 mM. Most notably, THF is an inhibitor of a number of cytochrome P450 (P450) dependent mixed function oxidase activities, with a particular affinity for the alcohol-induced isozyme (P450IIE1). Second, THF has been noted to enhance the toxic action of a number of compounds (i.e. solvent effect), in particular stimulating the more rapid absorption of reactive metabolites. A third factor to be considered is THF's ability to form peroxides upon standing. Little is known concerning the toxicity of THF peroxides. Therefore, while there is little evidence to suggest that THF would be a direct (Type I) hepatotoxin at relatively low doses, its ability to inhibit drug-metabolizing reactions (perhaps more so in alcohol users), and enhance the absorbance of reactive metabolites, are relatively unexplored avenues for THF to contribute to a hepatotoxic response. As a great deal of the human hepatotoxicity (Type II) is idiosyncratic and cannot be readily reproduced in experimental animals, this potential route of hepatotoxicity should be considered in future evaluations of human exposure to THF." @default.
• W1996855717 created "2016-06-24" @default.
• W1996855717 creator A5031442075 @default.
• W1996855717 date "1991-01-01" @default.
• W1996855717 modified "2023-10-18" @default.
• W1996855717 title "The Effect of Tetrahydrofuran on Biological Systems: Does a Hepatotoxic Potential Exist?" @default.
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• W1996855717 doi "https://doi.org/10.3109/01480549109011637" @default.
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