ヤノ ヒロミ   Yano Hiromi
  矢野 博己
   所属   川崎医療福祉大学  医療技術学部 健康体育学科
   職種   教授
論文種別 原著
言語種別 英語
査読の有無 査読あり
表題 Exercise training attenuates adipose tissue fibrosis in diet-induced obese mice.
掲載誌名 正式名:Biochemical and Biophysical Research Communications
略  称:Biochem Biophys Res Commun
巻・号・頁 440(4),774-779頁
著者・共著者 Noriaki Kawanishi, Hiroyuki Niihara, Tsubasa Mizokami, Hiromi Yano, Katsuhiko Suzuki
発行年月 2013/10
概要 Tissue fibrosis, such as that which occurs in obesity, is associated with chronic inflammatory diseases. Although regular exercise reduces adipose tissue inflammation, the mechanisms regulating the effects of exercise on adipose tissue fibrosis are unclear. This study aimed to clarify whether exercise training attenuates adipose tissue fibrosis with consequent reduction of extracellular matrix including collagens. Male C57BL/6J (4-week old) mice were randomly assigned to four groups that received a normal diet (ND) plus sedentary (n = 8), an ND plus exercise training (n = 8), a high-fat diet (HFD) plus sedentary (n = 12), and an HFD plus exercise training (n = 12). Mice were fed the ND or HFD from 4 to 20 weeks of age. The exercise groups were trained on a motorized treadmill for 60 min/day, five times/week over the same period. Histological hepatic fibrosis detected by Sirius red and a-smooth muscle actin staining were attenuated in HFD exercise mice compared with HFD sedentary mice. mRNA levels of transforming growth factor-b and tissue inhibitors of metalloproteinase-1, major regulators of tissue fibrosis, were increased in HFD sedentary mice but were attenuated in HFD exercise mice. Similarly, adipose tissue from the HFD sedentary mice contained higher macrophages than adipose tissue from the ND mice, and this was also lowered by exercise training. These findings suggest that exercise training may be effective for attenuating adipose tissue inflammation in obesity.