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Text
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URL Address
<a href="http://doi.org/10.1194/jlr.M016048" target="_blank" rel="noreferrer noopener">http://doi.org/10.1194/jlr.M016048</a>
Rights
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Pages
2234-2244
Issue
12
Volume
52
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Dublin Core
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Title
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Dissociation of diabetes and obesity in mice lacking orphan nuclear receptor small heterodimer partner
Publisher
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Journal of Lipid Research
Date
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2011
2011-12
Subject
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beta-oxidation; Biochemistry & Molecular Biology; birth-weight; diet-induced obesity; fatty-acid oxidation; hepatic steatosis; induced; insulin sensitivity; insulin-resistance; lipid-metabolism; liver; negative feedback-regulation; oxygen consumption; quotient; respiratory; retinoic acid; signaling pathways; skeletal-muscle
Creator
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Park Y J; Kim S C; Kim J; Anakk S; Lee J M; Tseng H T; Yechoor V; Park J; Choi J S; Jang H C; Lee K U; Novak C M; Moore D D; Lee Y K
Description
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Mixed background SHP(-/-) mice are resistant to diet-induced obesity due to increased energy expenditure caused by enhanced PGC-1 alpha expression in brown adipocytes. However, congenic SHP(-/-) mice on the C57BL/6 background showed normal expression of PGC-1 alpha and other genes involved in brown adipose tissue thermogenesis. Thus, we reinvestigated the impact of small heterodimer partner (SHP) deletion on diet-induced obesity and insulin resistance using congenic SHP(-/-) mice. Compared with their C57BL/6 wild-type counterparts, SHP(-/-) mice subjected to a 6 month challenge with a Western diet (WestD) were leaner but more glucose intolerant, showed hepatic insulin resistance despite decreased triglyceride accumulation and increased beta-oxidation, exhibited alterations in peripheral tissue uptake of dietary lipids, maintained a higher respiratory quotient, which did not decrease even after WestD feeding, and displayed islet dysfunction. Hepatic mRNA expression analysis revealed that many genes expressed higher in SHP(-/-) mice fed WestD were direct peroxisome proliferator-activated receptor alpha (PPAR alpha) targets. Indeed, transient transfection and chromatin immunoprecipitation verified that SHP strongly repressed PPAR alpha-mediated transactivation. SHP is a pivotal metabolic sensor controlling lipid homeostasis in response to an energy-laden diet through regulating PPAR alpha-mediated transactivation. The resultant hepatic fatty acid oxidation enhancement and dietary fat redistribution protect the mice from diet-induced obesity and hepatic steatosis but accelerate development of type 2 diabetes.-Park, Y. J., S. C. Kim, J. Kim, S. Anakk, J. M. Lee, H-T. Tseng, V. Yechoor, J. Park, J-S. Choi, H. C. Jang, K-U. Lee, C. M. Novak, D. D. Moore, and Y. K. Lee. Dissociation of diabetes and obesity in mice lacking orphan nuclear receptor small heterodimer partner. J. Lipid Res. 2011. 52: 2234-2244.
Identifier
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<a href="http://doi.org/10.1194/jlr.M016048" target="_blank" rel="noreferrer noopener">10.1194/jlr.M016048</a>
Format
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Journal Article
2011
Anakk S
beta-oxidation
Biochemistry & Molecular Biology
birth-weight
Choi J S
diet-induced obesity
fatty-acid oxidation
hepatic steatosis
Induced
insulin sensitivity
insulin-resistance
Jang H C
Journal Article
Journal of lipid research
Kim J
Kim S C
Lee J M
Lee K U
Lee Y K
lipid-metabolism
Liver
Moore D D
negative feedback-regulation
Novak C M
Oxygen Consumption
Park J
Park Y J
quotient
respiratory
retinoic acid
signaling pathways
skeletal-muscle
Tseng H T
Yechoor V