Document Detail


Acute regulation of metabolic genes and insulin receptor substrates in the liver of mice by one single bout of treadmill exercise.
MedLine Citation:
PMID:  19001047     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Acute exercise performance represents a major metabolic challenge for the skeletal muscle, but also for the liver as the most important source of energy. However the molecular adaptation of the liver to one single bout of exercise is largely unknown. C57BL/6 mice performed a 60 min treadmill run at high aerobic intensity. Liver, soleus and white gastrocnemius muscle were removed immediately after exercise. The single bout of exercise resulted in a very rapid and pronounced induction of hepatic metabolic enzymes and regulators of metabolism or transcription: glucose-6-phosphatase (G6Pase; 3-fold), pyruvate dehydrogenase kinase-4 (PDK4; 4.8-fold), angiopoietin-like 4 (2.1-fold), insulin receptor substrate (IRS)-2 (5.1-fold), peroxisome proliferator activated receptor-gamma coactivator 1alpha (PGC-1alpha; 3-fold). In soleus and white gastrocnemius muscle the up-regulation of IRS-2 and PDK4 was less pronounced compared with the liver and no significant induction of PGC-1alpha could be detected at this early time point. Activation of AMPK was found in both liver and white gastrocnemius muscle as phosphorylation of Thr-172. The induction of endogenous insulin secretion by a glucose load directly after the exercise bout resulted in a significantly higher PKB/Akt phosphorylation in the liver of exercised mice. The markedly enhanced IRS-2 protein amount, and presumably reduced serine/threonine phosphorylation of the IRS proteins induced by the acute exercise could be responsible for this enhanced action of insulin. In conclusion, acute exercise induced a rapid and pronounced transcriptional adaptation in the liver, and regulated hepatic IRS proteins leading to improved cellular insulin signal transduction.
Authors:
Miriam Hoene; Rainer Lehmann; Anita M Hennige; Ann Kathrin Pohl; Hans U Häring; Erwin D Schleicher; Cora Weigert
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-11-10
Journal Detail:
Title:  The Journal of physiology     Volume:  587     ISSN:  1469-7793     ISO Abbreviation:  J. Physiol. (Lond.)     Publication Date:  2009 Jan 
Date Detail:
Created Date:  2009-01-02     Completed Date:  2009-03-18     Revised Date:  2013-06-04    
Medline Journal Info:
Nlm Unique ID:  0266262     Medline TA:  J Physiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  241-52     Citation Subset:  IM    
Affiliation:
Division of Pathobiochemistry and Clinical Chemistry, University of Tuebingen, Otfried-Mueller-Strasse 10, D-72076 Tuebingen, Germany.
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MeSH Terms
Descriptor/Qualifier:
Animals
Base Sequence
DNA Primers / genetics
Insulin / metabolism
Insulin Receptor Substrate Proteins / metabolism*
Liver / metabolism*
Male
Mice
Mice, Inbred C57BL
Muscle, Skeletal / metabolism
Physical Exertion / physiology*
Protein-Serine-Threonine Kinases / metabolism
RNA, Messenger / genetics,  metabolism
RNA-Binding Proteins / metabolism
Signal Transduction
Transcription Factors / metabolism
Transcriptional Activation
Chemical
Reg. No./Substance:
0/DNA Primers; 0/Insulin; 0/Insulin Receptor Substrate Proteins; 0/Irs2 protein, rat; 0/Ppargc1a protein, rat; 0/RNA, Messenger; 0/RNA-Binding Proteins; 0/Transcription Factors; EC 2.7.11.1/Protein-Serine-Threonine Kinases; EC 2.7.11.2/pyruvate dehydrogenase (acetyl-transferring) kinase
Comments/Corrections

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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