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  • Title: Effect of piperonyl butoxide on disposition of di-2-ethylhexyl phthalate by rainbow trout.
    Author: Melancon MJ, Saybolt J, Lech JJ.
    Journal: Xenobiotica; 1977 Oct; 7(10):633-40. PubMed ID: 910464.
    Abstract:
    1. Piperonyl butoxide in vitro inhibits the oxidation and hydrolysis of di-2-ethylhexyl phthalate, and the hydrolysis of the butyl ester of 2,4-dichloro-phenoxyacetic acid by liver homogenate fractions and serum from rainbow trout. 2. The rates of oxidation and hydrolysis of di-2-ethylhexyl phthalate by liver homogenates from rainbow trout pre-exposed to piperonyl butoxide (1 mg/l) were considerably lower than those by liver homogenates from control trout. 3. Disposition of di-2-ethylhexyl [14C]phthalate in rainbow trout in vivo was modified by pre-exposure to piperonyl butoxide. The piperonyl butoxide-treated trout had lower levels of 14C in bile and higher levels of 14C in blood and muscle than control trout. 4. Muscle of control and piperonyl butoxide-exposed trout showed similar concentrations of mono-2-ethylhexyl phthalate but the concentration of di-2-ethylhexyl phthalate in muscle from piperonyl butoxide-exposed trout was three times the control value.
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