| Effect of exercise training on adipocyte-size-dependent expression of leptin and adiponectin. | |
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MedLine Citation:
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PMID: 20226796 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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AIMS: Our aim was to evaluate the effect of exercise training (TR) on adipocyte-size-dependent expression of leptin and adiponectin. MAIN METHODS: Male Wistar rats were divided into 2 groups, sedentary control (CR) and TR group, and both monitored for 9weeks. Adipocytes isolated from epididymal, retroperitoneal, and inguinal fat depots were independently separated into 3 fractions of different cell size, and the relationships between adipocyte size and either leptin or adiponectin mRNA were determined by real-time RT-PCR analysis. KEY FINDINGS: In epididymal and inguinal adipose tissue, positive relationships between adipocyte size and both leptin and adiponectin mRNA expression were found. Comparison of TR and CR rats showed no significant effect of TR on the slopes of the linear regression lines of correlation between leptin mRNA and adipocyte size in either adipose tissue, whereas the slopes of the regression line of correlation between adipocyte size and adiponectin mRNA were greater in TR group. Leptin levels per milliliter of plasma were significantly lower in TR than CR rats, whereas leptin levels adjusted to the 3 fat depots did not differ. TR did not affect adiponectin levels in plasma, whereas adiponectin levels adjusted to the 3 fat depots were significantly greater in TR than CR group. SIGNIFICANCE: TR-induced reduction in leptin mRNA expression was closely associated with smaller adipocyte size. However, TR amplified the adipocyte-size-dependent expression of adiponectin mRNA, suggesting that TR-induced alterations in adiponectin mRNA may also be mediated by factor(s) other than adipocyte size. |
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Authors:
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Satoko Miyazaki; Tetsuya Izawa; Jun-etsu Ogasawara; Takuya Sakurai; Sachiko Nomura; Takako Kizaki; Hideki Ohno; Takao Komabayashi |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-03-11 |
Journal Detail:
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Title: Life sciences Volume: 86 ISSN: 1879-0631 ISO Abbreviation: Life Sci. Publication Date: 2010 Apr |
Date Detail:
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Created Date: 2010-04-12 Completed Date: 2010-04-21 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0375521 Medline TA: Life Sci Country: Netherlands |
Other Details:
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Languages: eng Pagination: 691-8 Citation Subset: IM |
Affiliation:
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Health Promotion Science Group, Department of Human Health Science, Graduate School of Human Health Science, Tokyo Metropolitan University, Hachioji 192-0397, Japan. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adipocytes
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metabolism* Adiponectin / blood, metabolism* Animals Cell Size Gene Expression Regulation Leptin / blood, metabolism* Linear Models Male Physical Conditioning, Animal* RNA, Messenger / metabolism Rats Rats, Wistar Reverse Transcriptase Polymerase Chain Reaction Running |
| Chemical | |
Reg. No./Substance:
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0/Adiponectin; 0/Leptin; 0/RNA, Messenger |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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