Acute peripheral inflammation increases plasma concentration of hypoglycemic agent nateglinide with decreased hepatic drug-metabolizing activity in rats

Moeko Kojina, Keiichiro Suzuki, Akane Nishiwaki, Tetsuya Aiba

Research output: Contribution to journalArticlepeer-review

Abstract

The effects of inflammation on hypoglycemic agents were evaluated in male rats with acute peripheral inflammation (API). Nateglinide (NTG) was utilized as a model compound, since it is a hepatically-metabolized compound and its metabolism is mainly mediated by CYP 2C11 enzyme. In the experiments, rats were subjected to carrageenan injection into their hind paws for API induction, and the plasma concentration profiles of NTG were then examined. In addition, pooled liver microsomes were prepared from control and API rats, and the hepatic drug-metabolizing activity toward NTG and the hepatic expression of CYP2C11 protein were evaluated. It was shown that the plasma concentration of NTG following its intravenous administration decreases at a slower rate in API rats than that in control rats. It was also indicated in the incubation study with the liver microsomes that the hepatic drug-metabolizing activity toward NTG decreases in API rats. Additionally, it was revealed in Western immunoblotting that the hepatic expression of CYP2C11 protein decreases in API rats. These findings suggest that inflammation occurring in peripheral tissues brings about a decrease in hepatic NTG metabolism by suppressing the hepatic expression of CYP2C11 protein, causing an alteration of the plasma concentration profile of NTG with its impaired elimination.

Original languageEnglish
Pages (from-to)96-102
Number of pages7
JournalBiological and Pharmaceutical Bulletin
Volume44
Issue number1
DOIs
Publication statusPublished - Jan 1 2021

Keywords

  • Acute inflammation
  • CYP2C11
  • Hepatic drug metabolism
  • Nateglinide

ASJC Scopus subject areas

  • Pharmacology
  • Pharmaceutical Science

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