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Apolipoprotein CIII links islet insulin resistance to beta-cell failure in diabetes
- Avall, Karin (author)
- Ali, Yusuf (author)
- Leibiger, Ingo B. (author)
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- Leibiger, Barbara (author)
- Moede, Tilo (author)
- Paschen, Meike (author)
- Dicker, Andrea (author)
- Dare, Elisabetta (author)
- Kohler, Martin (author)
- Ilegems, Erwin (author)
- Abdulreda, Midhat H. (author)
- Graham, Mark (author)
- Crooke, Rosanne M. (author)
- Tay, Vanessa S. Y. (author)
- Refai, Essam (author)
- Jacob, Stefan (author)
- Selander, Lars (author)
- Berggren, Per-Olof (author)
- Juntti-Berggren, Lisa (author)
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- (creator_code:org_t)
- 2015-05-04
- 2015
- English.
- In: Proceedings of the National Academy of Sciences of the United States of America. - : Proceedings of the National Academy of Sciences. - 0027-8424 .- 1091-6490. ; 112:20, s. E2611-E2619
- Journal article (peer-reviewed)
Abstract
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- Insulin resistance and beta-cell failure are the major defects in type 2 diabetes mellitus. However, the molecular mechanisms linking these two defects remain unknown. Elevated levels of apolipoprotein CIII (apoCIII) are associated not only with insulin resistance but also with cardiovascular disorders and inflammation. We now demonstrate that local apoCIII production is connected to pancreatic islet insulin resistance and beta-cell failure. An increase in islet apoCIII causes promotion of a local inflammatory milieu, increased mitochondrial metabolism, deranged regulation of beta-cell cytoplasmic free Ca2+ concentration ([Ca2+](i)) and apoptosis. Decreasing apoCIII in vivo results in improved glucose tolerance, and pancreatic apoCIII knockout islets transplanted into diabetic mice, with high systemic levels of the apolipoprotein, demonstrate a normal [Ca2+](i) response pattern and no hallmarks of inflammation. Hence, under conditions of islet insulin resistance, locally produced apoCIII is an important diabetogenic factor involved in impairment of beta-cell function and may thus constitute a novel target for the treatment of type 2 diabetes mellitus.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Cell- och molekylärbiologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Cell and Molecular Biology (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Endokrinologi och diabetes (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Endocrinology and Diabetes (hsv//eng)
Keyword
- diabetes
- apoCIII
- insulin resistance
- pancreatic islets
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Dicker, Andrea
- Dare, Elisabetta
- Kohler, Martin
- Ilegems, Erwin
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- Graham, Mark
- Crooke, Rosanne ...
- Tay, Vanessa S. ...
- Refai, Essam
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- Jacob, Stefan
- Selander, Lars
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