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[Changes in the enzymic activity of monooxygenase components of rat hepatocytes after administration of tilorone]
Abstract:
It is established that tilorone-hydrochloride, the antiviral agent, stimulating the interferon synthesis in the organism of animals under experiment inhibits monooxygenase reactions in the albino rat hepatocytes being administered in combination with phenobarbital and 20-methylcholanthrene. The tilorone effect on the N- and O-demethylase activity of the liver microsomes in vitro was studied. It is established that the rate of dimethylaniline N-demethylation and anisole O-demethylation in this case lowers considerably, the character of the kinetic curves being unchanged.
Insights
Tilorone hydrochloride, an antiviral, inhibits liver monooxygenase reactions. This antiviral agent significantly lowers N- and O-demethylase activity in rat liver microsomes.
Area of Science:
- Pharmacology
- Biochemistry
- Toxicology
Context:
- Tilorone hydrochloride is an antiviral agent known to stimulate interferon synthesis.
- Drug interactions involving xenobiotics can alter metabolic enzyme activity.
- Monooxygenase enzymes are crucial for drug metabolism and detoxification.
Purpose:
- To investigate the effect of tilorone hydrochloride on hepatic monooxygenase activity.
- To determine the in vitro impact of tilorone hydrochloride on N- and O-demethylase activity in rat liver microsomes.
- To assess potential drug interactions between tilorone hydrochloride and known enzyme inducers like phenobarbital and 20-methylcholanthrene.
Summary:
- Tilorone hydrochloride inhibits monooxygenase reactions in albino rat hepatocytes when co-administered with phenobarbital and 20-methylcholanthrene.
- In vitro studies demonstrated that tilorone hydrochloride significantly reduces the N-demethylation of dimethylaniline and the O-demethylation of anisole.
- The kinetic profiles of these demethylase activities remained unchanged despite the observed reduction in reaction rates.
Impact:
- This study highlights a potential inhibitory effect of tilorone hydrochloride on key drug-metabolizing enzymes.
- Understanding these interactions is crucial for predicting the pharmacological and toxicological outcomes of co-administered drugs.
- The findings contribute to the knowledge of tilorone hydrochloride's mechanism of action and its potential to modulate xenobiotic metabolism.