Document Detail

Bidirectional alteration of insulin receptor affinity by different forms of physical exercise.
MedLine Citation:
PMID:  6364841     Owner:  NLM     Status:  MEDLINE    
Insulin binding of monocytes and erythrocytes was studied in untrained male volunteers after 15 min of exhaustive bicycle exercise (EE) and several days later after moderate exercise (ME) for 90 min. Insulin receptor affinity decreased after EE in monocytes (26.4% decrease; P less than 0.01) and in erythrocytes (10.4%; P less than 0.05) with no change in receptor number. After ME, however, binding to monocytes was enhanced by 15.2% (P less than 0.05) due to increased receptor affinity. The number of circulating monocytes was markedly increased after both forms of exercise, averaging 105% after EE and 57% after ME. The bidirectional effect on monocyte insulin binding could be reproduced in vitro by incubation of preexercise cells with post-exercise serum: 12.4% (P less than 0.05) decrease with EE serum and 6.1% (P less than 0.05) increase with ME serum. The effect was prevented by overnight dialysis. These results suggest that physical exercise not only entails adjustment of serum insulin but also of cellular hormone sensitivity, presumably through the mediation of low-molecular-weight serum components.
G Michel; T Vocke; W Fiehn; H Weicker; W Schwarz; W P Bieger
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The American journal of physiology     Volume:  246     ISSN:  0002-9513     ISO Abbreviation:  Am. J. Physiol.     Publication Date:  1984 Feb 
Date Detail:
Created Date:  1984-03-16     Completed Date:  1984-03-16     Revised Date:  2009-11-19    
Medline Journal Info:
Nlm Unique ID:  0370511     Medline TA:  Am J Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  E153-9     Citation Subset:  IM    
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MeSH Terms
Erythrocytes / metabolism
Insulin / metabolism*
Monocytes / metabolism
Physical Exertion*
Receptor, Insulin / metabolism*
Time Factors
Reg. No./Substance:
11061-68-0/Insulin; EC, Insulin

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

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