title: Adiponectin is regulated differently by chronic exercise than by weight-matched food restriction in hyperphagic and obese OLETF rats.
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.
authors.affiliation: Department of Pharmacotherapeutics, Kyoritsu University of Pharmacy, 1-5-30 Shibakoen, Minato-ku, Tokyo 105-8512, Japan. kimura-ms@kyoritsu-ph.ac.jp
authors.forename: Masaki
authors.initials: M
authors.lastname: Kimura
authors.forename: Tomokazu
authors.initials: T
authors.lastname: Shinozaki
authors.forename: Naoto
authors.initials: N
authors.lastname: Tateishi
authors.forename: Emi
authors.initials: E
authors.lastname: Yoda
authors.forename: Hideki
authors.initials: H
authors.lastname: Yamauchi
authors.forename: Masato
authors.initials: M
authors.lastname: Suzuki
authors.forename: Makoto
authors.initials: M
authors.lastname: Hosoyamada
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Shibasaki
mesh_terms: D017667:Adipocytes / Q000502:physiology; D052242:Adiponectin / Q000097:blood*; D000273:Adipose Tissue / Q000033:anatomy & histology; D000818:Animals; D003345:Corticosterone / Q000097:blood; D004195:Disease Models, Animal; D004822:Epididymis; D004958:Estradiol / Q000097:blood; D007328:Insulin / Q000097:blood; D020738:Leptin / Q000097:blood; D008297:Male; D009765:Obesity / Q000097:blood* / Q000235:genetics; D010805:Physical Conditioning, Animal; D051381:Rats; D020334:Rats, Inbred OLETF; D012420:Running; D013739:Testosterone / Q000097:blood
chemical_list: D052242:Adiponectin; D007328:Insulin; D020738:Leptin; D013739:Testosterone; D004958:Estradiol; D003345:Corticosterone