Abstract:
:The effects of the turmeric ethyl acetate fraction (TEF) from the methanolic extract from Curcuma longa L. on lipid metabolism and underlying mechanisms of lipolysis were investigated in 3T3-L1 adipocytes. The intracellular lipid droplets were stained with Oil red O dye and quantified. Compared to the control, lipid accumulation was significantly decreased by 46.6% with treatment by TEF at the concentration of 20 microg/mL. The intracellular triglyceride (TG) level was also reduced by 37.9% at the concentration of 20 microg/mL. To determine the mechanism for TG content reduction, levels of glucose uptake and glycerol release were measured. Incubation of the 3T3-L1 adipocytes with TEF for 4 hours significantly lowered the cellular level of glucose in a dose-dependent manner. Furthermore, cellular expression of insulin-responsive glucose transporter (GLUT)-4 was decreased by 46%, indicating that reduced glucose uptake was due to a decrease in cellular GLUT-4 expression. In addition, the level of free glycerol released into the cultured medium was increased by 36.4% with the treatment by TEF. In subsequent measurements using quantitative real-time polymerase chain reaction, mRNA levels of hormone-sensitive lipase (HSL) and adipose TG lipase (ATGL) were elevated by 34.8% and 16.9%, respectively, at the concentration of 20 microg/mL. These results suggest that TEF partially inhibits lipogenesis by the suppression of glucose uptake via the decreased expression of cellular GLUT-4 and stimulates lipolysis through the induction of HSL and/or ATGL gene expression, resulting in the increased glycerol release.
journal_name
J Med Foodjournal_title
Journal of medicinal foodauthors
Lee J,Yoon HG,Lee YH,Park J,You Y,Kim K,Jang JY,Yang JW,Jun Wdoi
10.1089/jmf.2009.1276subject
Has Abstractpub_date
2010-04-01 00:00:00pages
364-70issue
2eissn
1096-620Xissn
1557-7600journal_volume
13pub_type
杂志文章abstract::The chemical composition and antibacterial activity of Thymus glabrescens Willd. (thyme) essential oil were examined, as well as its association with tetracycline. The antibacterial activities of geraniol and thymol, the main constituents of T. glabrescens oil, were also determined. Gas chromatography and gas chromato...
journal_title:Journal of medicinal food
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journal_title:Journal of medicinal food
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journal_title:Journal of medicinal food
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journal_title:Journal of medicinal food
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journal_title:Journal of medicinal food
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journal_title:Journal of medicinal food
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journal_title:Journal of medicinal food
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
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journal_title:Journal of medicinal food
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journal_title:Journal of medicinal food
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journal_title:Journal of medicinal food
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journal_title:Journal of medicinal food
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journal_title:Journal of medicinal food
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