Phospholipase C-related catalytically inactive protein-knockout mice exhibit uncoupling protein 1 upregulation in adipose tissues following chronic cold exposure

Kana Oue, Yosuke Yamawaki, Satoshi Asano, Akiko Mizokami, Masato Hirata, Masahiro Irifune, Takashi Kanematsu

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Objectives We have previously demonstrated that phospholipase C-related catalytically inactive protein (PRIP) is involved in fat metabolism and energy consumption. However, whether PRIP participates in body energy metabolism in vivo remains to be determined. Therefore, we examined whether PRIP deficiency affects whole-body energy homeostasis, which is modulated by non-shivering thermogenesis in brown adipose tissue, using a cold exposure animal model. Methods Fasting plasma triacylglycerol levels were measured to evaluate fat metabolism in wild-type and Prip-KO mice. In addition, a glucose tolerance test (GTT) and insulin tolerance test (ITT) were performed. To determine changes in energy consumption, mice were exposed to a cold environment for 7 days, and expression of uncoupling protein 1 (UCP1) in brown adipose tissue was analyzed via western blotting. Results Fasting plasma levels of triacylglycerols were significantly higher in Prip-KO mice than in wild-type mice. However, Prip-KO mice showed a healthy phenotype based on GTT and ITT. UCP1 expression was significantly upregulated in the brown and white adipose tissues of Prip-KO mice exposed to cold conditions. Conclusion Prip-KO mice exhibit greater ability to consume lipids as an energy source, indicating that PRIP modulates of systemic energy expenditure. Our findings provide increased understanding of PRIP-mediated non-shivering thermogenic mechanisms and offers important insights for the treatment and control of obesity.

Original languageEnglish
Pages (from-to)108-112
Number of pages5
Journaljournal of oral biosciences
Volume59
Issue number2
DOIs
Publication statusPublished - May 2017
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Medicine (miscellaneous)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Dentistry(all)

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