Abstract:
BACKGROUND:While the effect of fatty acids and ectopic triglyceride storage in pancreatic beta cells has been well-defined, only limited information is available on alpha cells. This study evaluates the long-term impact of fatty acids on alpha cell function and proliferation as well as fatty acid oxidation. METHODS:Clonal alpha cells were cultured with fatty acids in the presence of high glucose for up to 3 days. The influence of fatty acids on glucagon secretion, glucagon content and triglyceride accumulation from 24 to 72 h was investigated. After a - 72 h culture, cell proliferation, carnitine palmitoyl transferase-1 mRNA level and the effect of etomoxir were also elucidated. RESULTS:Fatty acids stimulated glucagon secretion and increased triglyceride accumulation in a time- and dose-dependent manner, but inhibited alpha cell proliferation. Lower concentrations (0.125-0.25 mM) of fatty acids significantly increased glucagon secretion at 48 and 72 h, but did not affect triglyceride content. However, a marked increment in triglyceride accumulation occurred in the presence of 0.5 mM fatty acids. Fatty acids caused an up-regulation of the expression of carnitine palmitoyl transferase-1 gene. Etomoxir (1 microM) reversed fatty acid-induced glucagon hypersecretion, but did not inhibit carnitine palmitoyl transferase-1 mRNA level. CONCLUSIONS:Our data indicates that compared with triglyceride accumulation, glucagon secretion is more sensitive to changes in fatty acid concentration. The effect of fatty acids on the glucagon response is mediated through their oxidation. The high carnitine palmitoyl transferase-1 gene expression and the accumulation of triglyceride may initially be a compensatory oxidation reaction to elevated fatty acids.
journal_name
Diabetes Metab Res Revjournal_title
Diabetes/metabolism research and reviewsauthors
Hong J,Jeppesen PB,Nordentoft I,Hermansen Kdoi
10.1002/dmrr.663subject
Has Abstractpub_date
2007-03-01 00:00:00pages
202-10issue
3eissn
1520-7552issn
1520-7560journal_volume
23pub_type
杂志文章abstract:BACKGROUND:Leptin's hematopoietic or proinflammatory role has been experimentally reported. We investigated whether serum leptin concentrations are associated with white blood cell (WBC) counts in humans. METHODS:Serum leptin concentrations of Japanese civil servants aged 40 to 59 years (1082 men and 200 women) were a...
journal_title:Diabetes/metabolism research and reviews
pub_type: 杂志文章
doi:10.1002/dmrr.540
更新日期:2005-09-01 00:00:00
abstract:BACKGROUND:Proatherogenic stimuli during foetal life may predispose to development of atherosclerosis in adulthood. Elevated plasma low-density lipoprotein (LDL) cholesterol and C-reactive protein (CRP) expression is associated with increased risk of atherosclerosis. METHODS AND RESULTS:In this study, we examined how ...
journal_title:Diabetes/metabolism research and reviews
pub_type: 杂志文章
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更新日期:2008-09-01 00:00:00
abstract::Abstinence from food and liquid during daylight hours is observed by Muslim individuals during the month of Ramadan. Even though the Koran exempts the sick from fasting, many people with diabetes still fast during this religious period. It is essential for patients, family and healthcare professionals to be aware of t...
journal_title:Diabetes/metabolism research and reviews
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更新日期:2010-11-01 00:00:00
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pub_type: 杂志文章
doi:10.1002/dmrr.1066
更新日期:2010-02-01 00:00:00
abstract:BACKGROUND:To evaluate the association of statins and co-morbidities with new onset type 2 diabetes mellitus (T2DM) in patients 65 years and older. METHODS:This retrospective study used de-identified administrative healthcare claims and enrolment data from a Medicare Advantage Prescription Drug (MAPD) health plan offe...
journal_title:Diabetes/metabolism research and reviews
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journal_title:Diabetes/metabolism research and reviews
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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pub_type: 杂志文章
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journal_title:Diabetes/metabolism research and reviews
pub_type: 杂志文章,评审
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更新日期:2020-11-30 00:00:00
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journal_title:Diabetes/metabolism research and reviews
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journal_title:Diabetes/metabolism research and reviews
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更新日期:2003-05-01 00:00:00
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更新日期:2019-05-01 00:00:00
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pub_type: 杂志文章,评审
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更新日期:2018-03-01 00:00:00
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pub_type: 杂志文章,评审
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更新日期:2018-01-01 00:00:00
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journal_title:Diabetes/metabolism research and reviews
pub_type: 杂志文章,随机对照试验
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更新日期:2009-05-01 00:00:00
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更新日期:2004-05-01 00:00:00
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pub_type: 杂志文章
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更新日期:2009-11-01 00:00:00
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journal_title:Diabetes/metabolism research and reviews
pub_type: 杂志文章,评审
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更新日期:2013-07-01 00:00:00
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journal_title:Diabetes/metabolism research and reviews
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pub_type: 杂志文章
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pub_type: 杂志文章
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更新日期:2015-07-01 00:00:00
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journal_title:Diabetes/metabolism research and reviews
pub_type: 杂志文章,评审
doi:10.1002/1520-7560(200009/10)16:1+<::aid-dmrr130>3.
更新日期:2000-09-01 00:00:00