Effect of PRASEODYMIUM CHLORIDE (cas 10361-79-2) on liver microsomal enzymes of rats

Add time:08/05/2019    Source:sciencedirect.com

A single i.v. dose (5 mg/kg) of a light lanthanon, praseodymium, prolonged the duration of hexobarbital-induced sleep and zoxazolamine-induced paralysis, as well as it modified pharmacokinetic parameters of hexobarbital and zoxazolamine, in rats. Half-lives (t12) and area under the curve (AUC) were increased, while elimination coefficient (β) and clearance (Cl) were decreased. However, in daily doses of 1 mg/kg i.p. for 15 days, praseodymium did not alter pharmacological effects and pharmacokinetic parameters. The in vitro hydroxylation of hexobarbital and zoxazolamine by liver microsomes was inhibited when the animals were treated previously with a single i.v. dose (5 mg/kg) of PRASEODYMIUM CHLORIDE (cas 10361-79-2). In these animals, the amount of cytochromes P-450 and b5 were reduced significantly, whereas that of NADPH-cytochrome c reductase remained unchanged. The pretreatment of animals with phenobarbital normalized the microsomal enzyme impairment caused by praseodymium.

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