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Inverse regulation of leptin mRNA expression by short- and long-chain fatty acids in cultured bovine adipocytes

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Title: Inverse regulation of leptin mRNA expression by short- and long-chain fatty acids in cultured bovine adipocytes
Authors: Soliman, Mohamed Browse this author
Kimura, Kazuhiro Browse this author →KAKEN DB
Ahmed, Mohamed Browse this author
Yamaji, Daisuke Browse this author
Matsushita, Yukiko Browse this author
Okamatsu-Ogura, Yuko Browse this author →KAKEN DB
Makondo, Kennedy Browse this author
Saito, Masayuki Browse this author
Keywords: Adiponectin
G protein-coupled receptor
Leptin
MAP kinase
Pertussis toxin
Volatile fatty acids
Issue Date: Nov-2007
Publisher: Elsevier Inc.
Journal Title: Domestic Animal Endocrinology
Volume: 33
Issue: 4
Start Page: 400
End Page: 409
Publisher DOI: 10.1016/j.domaniend.2006.08.005
PMID: 17011156
Abstract: Leptin is an adipose tissue-derived cytokine plays key roles in the regulation of food intake and energy expenditure. However, regulatory mechanisms of leptin gene expression are not fully elucidated in ruminants that utilize short-chain fatty acids (SCFA), known as volatile fatty acids, as principal energy sources. In this study, we determined effects of SCFA and long-chain fatty acids (LCFA) on leptin expression in bovine adipocytes. Bovine stromal vascular cells isolated from subcutaneous adipose tissue of Holstein cows were cultured to confluence and treated sequentially with dexamethasone and isobutylmethylxanthine for 2 days and insulin and troglitazone for 12 days to achieve full differentiation to adipocytes. The cells started to accumulate lipids 4 days after the onset of treatment, with increased mRNA expression of leptin, as well as aP2, adiponectin, and PPAR-γ. Removal of fetal calf serum and reduction of glucose in the culture medium of differentiated adipocytes decreased leptin mRNA expression. Subsequent addition of acetate, butyrate, or propionate dose-dependently restored and rather increased leptin expression, while addition of LCFA suppressed it. The stimulatory effect of acetate was abolished by prior treatment of the cells with pertussis toxin and by addition of LCFA. Furthermore, cows fasted for 48 h and fed thereafter, elaborate reduced and increased plasma leptin levels, respectively. Thus, these results suggest that plasma leptin levels in cows are inversely controlled at the transcription level by VFA and LCFA, and that the effects of SCFA possibly act through a G protein-coupled receptor for SCFA.
Relation: http://www.sciencedirect.com/science/journal/07397240
Type: article (author version)
URI: http://hdl.handle.net/2115/30264
Appears in Collections:獣医学院・獣医学研究院 (Graduate School of Veterinary Medicine / Faculty of Veterinary Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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