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Voluntary exercise training improves body weight of leptin-deficient ob/ob mice by altering hepatic stearoyl-CoA desaturase 1 and deleted in breast cancer 1 protein levels

  • Lim, Wonchung (Department of Sports Medicine, Cheongju University) ;
  • Hwang, Moon-Hyon (Division of Health & Kinesiology, Incheon National University) ;
  • Kang, Chounghun (Department of Physical Education, Inha University) ;
  • Kim, So Yeon (Department of Dental Hygiene, Cheongju University) ;
  • Cho, Hyeseong (Department of Biochemistry and Molecular Biology, Ajou University School of Medicine)
  • Received : 2021.11.11
  • Accepted : 2021.12.30
  • Published : 2021.12.31

Abstract

[Purpose] Deleted in breast cancer 1 (DBC1) ablation causes obesity, and stearoyl-CoA desaturase 1 (SCD1) induces the biosynthesis of monounsaturated fatty acids. This study examined whether voluntary wheel running (VWR) alters SCD-1 and DBC1 protein levels in the liver of leptin-deficient ob/ob mice. [Methods] Twenty-five Ob/Ob mice were divided into two groups (ob/ob-Sed and ob/ob-Ex). The expression of DBC1 and SCD1 in the mouse liver was determined using western blotting. [Results] After 10 weeks, VWR significantly reduced body weight without affecting the fatty acid synthase and CD36 protein levels. The average daily running distance was 4.0±1.0 km/day. This improvement was associated with changes in the hepatic SCD1 and DBC1 levels. Hepatic SCD-1 protein levels increased significantly, and DBC1 protein levels decreased in ob/ob-Sed animals. On the other hand, VWR inhibited the obesity-induced increase in SCD1 expression and impaired the obesity-induced decrease in DBC1 expression in the liver of leptin-deficient ob/ob mice. [Conclusion] This is the first study showing that VWR has strong effects on hepatic SCD1 and DBC1 in ob/ob mice, and provides key insights into the effects of exercise on obesity.

Keywords

Acknowledgement

This work was supported by the National Research Foundation of Korea (NRF-2018R1D1A1B07048750 and NRF-2019S1A5A2A03051702) funded by the Korean government.

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