| Autor: |
Nazmul Hasan, Naoto Nagata, Jun-ichi Morishige, Md Tarikul Islam, Zheng Jing, Ken-ichi Harada, Michihiro Mieda, Masanori Ono, Hiroshi Fujiwara, Takiko Daikoku, Tomoko Fujiwara, Yoshiko Maida, Tsuguhito Ota, Shigeki Shimba, Shuichi Kaneko, Akio Fujimura, Hitoshi Ando |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Molecular Metabolism, Vol 49, Iss , Pp 101202- (2021) |
| Druh dokumentu: |
article |
| ISSN: |
2212-8778 |
| DOI: |
10.1016/j.molmet.2021.101202 |
| Popis: |
Objective: Impaired circadian clocks can cause obesity, but their pathophysiological role in brown adipose tissue (BAT), a major tissue regulating energy metabolism, remains unclear. To address this issue, we investigated the effects of complete disruption of the BAT clock on thermogenesis and energy expenditure. Methods: Mice with brown adipocyte-specific knockout of the core clock gene Bmal1 (BA-Bmal1 KO) were generated and analyzed. Results: The BA-Bmal1 KO mice maintained normal core body temperatures by increasing shivering and locomotor activity despite the elevated expression of thermogenic uncoupling protein 1 in BAT. BA-Bmal1 KO disrupted 24 h rhythmicity of fatty acid utilization in BAT and mildly reduced both BAT thermogenesis and whole-body energy expenditure. The impact of BA-Bmal1 KO on the development of obesity became obvious when the mice were fed a high-fat diet. Conclusions: These results reveal the importance of the BAT clock for maintaining energy homeostasis and preventing obesity. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
|
