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The critical role of VEGF in skeletal muscle angiogenesis and blood flow.
MedLine Citation:
PMID:  22103486     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
VEGF (vascular endothelial growth factor) is well known as an important molecule in angiogenesis. Its inhibition is pursued as an anticancer therapy; its enhancement as therapy for tissue ischaemia. In the present paper, its role in skeletal muscle is explored, both at rest and after exercise. Muscle VEGF mRNA and protein are increased severalfold after heavy exercise. Whereas global VEGF knockout is embryonically lethal, muscle-specific knockout is not, providing models for studying its functional significance. Its deletion in adult mouse skeletal muscle: (i) reduces muscle capillarity by more than 50%, (ii) decreases exercise endurance time by approximately 80%, and (iii) abolishes the angiogenic response to exercise training. What causes VEGF to increase with exercise is not clear. Despite regulation by HIF (hypoxia-inducible factor), increased HIF on exercise, and PO2 falling to single digit values during exercise, muscle-specific HIF knockout does not impair performance or capillarity, leaving many unanswered questions.
Authors:
Peter D Wagner
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Biochemical Society transactions     Volume:  39     ISSN:  1470-8752     ISO Abbreviation:  Biochem. Soc. Trans.     Publication Date:  2011 Dec 
Date Detail:
Created Date:  2011-11-22     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7506897     Medline TA:  Biochem Soc Trans     Country:  England    
Other Details:
Languages:  eng     Pagination:  1556-9     Citation Subset:  IM    
Affiliation:
Distinguished Professor of Medicine and Bioengineering, Department of Medicine, University of California, San Diego, 9500 Gilman Drive, DEPT 0623A, La Jolla, CA 92093-0623, U.S.A.
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