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- W1996520281 abstract "A primary rat hepatocyte culture system was utilized to determine the proximate peroxisome proliferator(s) derived from di(2-ethylhexyl) phthalate (DEHP). DEHP was administered to rats and the urinary metabolites were identified and isolated. The major metabolites were those resulting from initial ω- or ω — 1-carbon oxidation of the mono(2-ethylhexyl) phthalate (MEHP) moiety. These metabolites, together with MEHP and 2-ethylhexanol, were added to primary rat hepatocyte cultures and the effect on peroxisomal enzyme activity was determined. The ω-carbon oxidation products [mono(3-carboxy-2-ethylpropyl) phthalate (I) and mono(5-carboxy-2-ethylpentyl) phthalate (V)] and 2-ethylhexanol produced little or no effect on CN−-insensitive palmitoyl-CoA oxidation (a peroxisomal marker). MEHP and the ω — 1-carbon oxidation products [mono-(2-ethyl-5-oxohexy) phthalate (VI) and mono(2-ethyl-5-hydroxyhexyl) phthalate (IX)] produced a large (7-to 11-fold) induction of peroxisomal enzyme activity. Similar structure-activity relationships were observed for the induction of cytochrome P-450-mediated lauric acid hydroxylase and increase in cellular coenzyme A content. This identification of the proximate proliferators will aid in the elucidation of the mechanism by which DEHP causes proliferation of peroxisomes in the rodent liver. Oral administration of MEHP (150 or 250 mg/kg) to male guinea pigs did not produce hepatic peroxisome proliferation. Addition of MEHP (0 to 0.5 mm) or one of the “active” proliferators in the rat (metabolite IX, 0 to 0.5 mm) to primary guinea pig hepatocyte cultures also failed to produce an induction of peroxisomal β-oxidation. Possible reasons for this species difference are discussed." @default.
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- W1996520281 date "1985-08-01" @default.
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- W1996520281 title "Identification of the proximate peroxisome proliferator(s) derived from Di(2-ethylhexyl) phthalate" @default.
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- W1996520281 doi "https://doi.org/10.1016/0041-008x(85)90097-3" @default.
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