title: Inhibition of coal fly ash polycyclic aromatic hydrocarbons and metals induced mixed-function oxidase activity in rat lung and liver by vitamin A and citrate.
abstract: Administration of benzene-soluble fraction (FAE) and benzene-insoluble fraction (FAR) of fly ash for 3 consecutive days to rats significantly raised cytochrome P-450 levels, aryl hydrocarbon hydroxylase (AHH) activity, and glutathione S-transferase activity in liver. This treatment also significantly increased pulmonary AHH and glutathione S-transferase activity. Intratracheal administration of FAR (5 mg/100 g body weight) alone for 6 consecutive days also significantly increased hepatic cytochrome P-450 levels and the activity of glutathione S-transferase. Intragastric administration of retinyl palmitate (5000 IU/100 g body weight), along with intratracheal FAE and FAR administration, significantly reduced P-450 levels, activity of glutathione S-transferase in liver, and activity of AHH and glutathione S-transferase in lung of rats. Intraperitoneal administration of citrate (40 mg/100 g body weight) along with FAR significantly reduced FAR-induced increase in hepatic cytochrome P-450 levels and glutathione S-transferase activity. The activity of AHH was not affected by these treatments.
mesh_terms: D000818:Animals; D001189:Aryl Hydrocarbon Hydroxylases / Q000096:biosynthesis / Q000378:metabolism; D001835:Body Weight / Q000187:drug effects; D002244:Carbon / Q000633:toxicity*; D002951:Citrates / Q000494:pharmacology*; D019343:Citric Acid; D060729:Coal Ash; D003577:Cytochrome P-450 Enzyme System / Q000096:biosynthesis / Q000378:metabolism; D005982:Glutathione Transferase / Q000096:biosynthesis / Q000378:metabolism; D006838:Hydrocarbons / Q000633:toxicity; D008099:Liver / Q000187:drug effects* / Q000201:enzymology; D008168:Lung / Q000187:drug effects* / Q000201:enzymology; D008297:Male; D006899:Mixed Function Oxygenases / Q000096:biosynthesis / Q000378:metabolism*; D052638:Particulate Matter; D051381:Rats; D011919:Rats, Inbred Strains; D014801:Vitamin A / Q000494:pharmacology*
chemical_list: D002951:Citrates; D060729:Coal Ash; D006838:Hydrocarbons; D052638:Particulate Matter; D014801:Vitamin A; D019343:Citric Acid; D002244:Carbon; D003577:Cytochrome P-450 Enzyme System; D006899:Mixed Function Oxygenases; D001189:Aryl Hydrocarbon Hydroxylases; D005982:Glutathione Transferase