Lab Anim Res.  2020 Sep;36(3):197-207. 10.1186/s42826-020-00060-2.

Early high-fat feeding improves histone modifications of skeletal muscle at middle-age in mice

Affiliations
  • 1Department of Sports and Health Science, Faculty of Human Health and Science, Matsumoto University, 2095-1 Niimura, Matsumoto City, Nagano, 390-1295, Japan
  • 2Graduate School of Health Sciences, Matsumoto University, 2095-1 Niimura, Matsumoto City, Nagano, 390-1295, Japan

Abstract

The purpose of the present study was to investigate how the effects of high-fat diet feeding on the skeletal muscle persisted during aging using mice. Post-weaned male mice were fed a high-fat diet between 1- and 3-mo-old followed by return to supply a normal diet until 13-mo-old. Monthly physical tests demonstrated that age-related glucose intolerance that was generally developed after 10-mo-old in the control mice was significantly improved in mice fed a high-fat diet. Interestingly, mRNA expressions of Pdk4 , Ucp3, and Zmynd17 were up-regulated by high-fat feeding and persisted in the tibialis anterior muscle until 13-mo-old. At Pdk4 and Ucp3 loci, enhanced distributions of active histone modifications were noted in the high-fat-fed mice at 13-mo-old. In contrast, age-related accumulation of histone variant H3.3 at these loci was suppressed. These results indicated that epigenetic modifications caused by early nutrition mediated the changes in skeletal muscle gene expression during aging.

Keyword

Aging; Skeletal muscle; Epigenetics; Histone modification; Gene expression; Glucose tolerance
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