| Overexpression of Constitutively Active PKG-I Protects Female, But Not Male Mice From Diet-Induced Obesity. | |
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MedLine Citation:
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PMID: 20930715 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Cyclic guanosine monophosphate (cGMP)-dependent protein kinase I (PKG-I) is a multifunctional protein. The direct effects of PKG-I activation on energy homeostasis and obesity development are not well understood. Herein, we generated transgenic mice with expression of the constitutively active PKG-I in adipose tissue as well as in other tissues. Male and female PKG-I overexpressing mice were fed a low-fat (LF) or high-fat (HF) diet for 16 weeks. HF-fed female PKG-I transgenic mice had decreased body weight gain, lower percentage of body fat, and improved glucose tolerance compared to HF-fed wild-type (WT) controls. In contrast, male transgenic PKG-I mice were not resistant to the development of HF-diet-induced obesity, and exhibited similar levels of adiposity and glucose intolerance as HF-fed WT controls. Furthermore, we found that HF-fed female transgenic PKG-I mice had increased energy expenditure and cold-induced adaptive thermogenesis compared to HF-fed WT controls, which was associated with increased expression of uncoupling protein-1 (UCP1) in brown adipose tissue (BAT). In addition, the rates of lipolysis in white adipose tissue (WAT) were also increased in female transgenic PKG-I mice compared to WT controls due to increased phosphorylation of hormone-sensitive lipase (HSL). However, in male mice, adaptive thermogenesis or WAT lipolysis was similar between transgenic PKG-I mice and WT controls. Together, these data demonstrate sex differences in effects of PKG-I activation on the regulation of adipose tissue function and its contribution to diet induced obesity. |
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Authors:
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Dejan M Nikolic; Yanzhang Li; Shu Liu; Shuxia Wang |
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Publication Detail:
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Type: Journal Article Date: 2010-10-07 |
Journal Detail:
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Title: Obesity (Silver Spring, Md.) Volume: 19 ISSN: 1930-7381 ISO Abbreviation: Obesity (Silver Spring) Publication Date: 2011 Apr |
Date Detail:
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Created Date: 2011-03-28 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101264860 Medline TA: Obesity (Silver Spring) Country: United States |
Other Details:
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Languages: eng Pagination: 784-91 Citation Subset: IM |
Affiliation:
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Graduate Center for Nutritional Sciences, University of Kentucky, Lexington, Kentucky, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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