Abstract
The mechanisms controlling fat depot-specific metabolism are poorly understood. During starvation of mice, downregulation of lipogenic genes, suppression of fatty acid synthesis, and increases in lipid oxidation were all more pronounced in epididymal than in subcutaneous fat. In epididymal fat, relatively strong upregulation of uncoupling protein 2 and phosphoenolpyruvate carboxykinase genes was found. In mice maintained both at 20 and 30 degrees C, AMP-activated protein kinase was activated in epididymal but did not change in subcutaneous fat. Our results suggest that AMPK may have a role in the different response of various fat depots to starvation.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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AMP-Activated Protein Kinases
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Adipose Tissue / metabolism*
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Animals
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Body Weight
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Epididymis / metabolism
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Fatty Acids, Nonesterified / genetics
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Fatty Acids, Nonesterified / metabolism*
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Gene Expression Regulation
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Ion Channels
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Lipid Metabolism* / genetics
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Male
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Membrane Transport Proteins / genetics
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Mice
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Mitochondrial Proteins / genetics
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Multienzyme Complexes / physiology*
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Protein Serine-Threonine Kinases / genetics
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Protein Serine-Threonine Kinases / physiology*
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Starvation / enzymology*
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Starvation / genetics
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Uncoupling Protein 2
Substances
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Fatty Acids, Nonesterified
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Ion Channels
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Membrane Transport Proteins
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Mitochondrial Proteins
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Multienzyme Complexes
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Ucp2 protein, mouse
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Uncoupling Protein 2
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phosphoenolpyruvate carboxylase kinase
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Protein Serine-Threonine Kinases
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AMP-Activated Protein Kinases