Adiponectin is regulated differently by chronic exercise than by weight-matched food restriction in hyperphagic and obese OLETF rats

Masaki Kimura, Tomokazu Shinozaki, Naoto Tateishi, Emi Yoda, Hideki Yamauchi, Masato Suzuki, Makoto Hosoyamada, Toshiaki Shibasaki

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

This study was intended to investigate the effects of chronic exercise on blood adiponectin level. Male Otsuka Long Evans Tokushima Fatty (OLETF) rats (26 weeks old) were divided to undergo either regular 12-week wheel running exercise (EX) or to have food restriction (FR) that resulted in body weight reduction similar to that in EX. Both EX and FR induced similar reductions in body weight, abdominal fat volume and plasma leptin concentration compared with ad libitum control. At the end of the study, although plasma adiponectin level was increased in FR, the adiponectin level did not change in EX. Plasma testosterone level was higher in EX than in either of the other two groups. A significant inverse relationship existed between plasma levels of adiponectin and testosterone for all groups. Our results suggested that 12-week voluntary wheel running exercise induces different effects on plasma adiponectin level than does food restriction, despite similar reduction in body weight, fat tissue mass and plasma leptin concentration. We speculate that the elevated plasma testosterone concentration might offset any hyperadiponectinemic effect of body weight and fat volume reduction in exercising rats.

Original languageEnglish
Pages (from-to)2105-2111
Number of pages7
JournalLife Sciences
Volume79
Issue number22
DOIs
Publication statusPublished - 2006 Oct 26

Keywords

  • Adiponectin
  • Fat tissue mass
  • Food restriction
  • Testosterone
  • Voluntary exercise

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Pharmacology, Toxicology and Pharmaceutics(all)

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