title: Piperonyl butoxide as a tool in aquatic toxicological research with organophosphate insecticides.
abstract: Experiments were conducted to determine the effects of piperonyl butoxide, a synthetic methylenedioxyphenyl inhibitor of cytochrome(s) P450, on the toxicity of organophosphate insecticides to three cladoceran test species: Ceriodaphnia dubia. Daphnia magna, and Daphnia pulex. Coadministration of piperonyl butoxide effectively reduced the acute toxicity of four metabolically activated organophosphates (parathion, methyl parathion, diazinon, and malathion) and did not affect the toxicity of three organophosphates not requiring metabolic activation (dichlorvos, chlorfenvinphos, and mevinphos). These results indicate that piperonyl butoxide may be an effective tool in toxicological research focused upon identifying specific compounds responsible for toxicity in complex aqueous mixtures.
authors.affiliation: U.S. Environmental Protection Agency, Duluth, Minnesota.
authors.forename: G T
authors.initials: GT
authors.lastname: Ankley
authors.forename: J R
authors.initials: JR
authors.lastname: Dierkes
authors.forename: D A
authors.initials: DA
authors.lastname: Jensen
authors.forename: G S
authors.initials: GS
authors.lastname: Peterson
mesh_terms: D000818:Animals; D003445:Crustacea / Q000187:drug effects*; D003577:Cytochrome P-450 Enzyme System / Q000187:drug effects; D003621:Daphnia / Q000187:drug effects*; D004305:Dose-Response Relationship, Drug; D007306:Insecticides / Q000494:pharmacology*; D009943:Organophosphorus Compounds; D010882:Piperonyl Butoxide / Q000494:pharmacology*; D013045:Species Specificity; D014116:Toxicology / Q000379:methods
chemical_list: D007306:Insecticides; D009943:Organophosphorus Compounds; D003577:Cytochrome P-450 Enzyme System; D010882:Piperonyl Butoxide