Document Detail


Effects of two training protocols on Angiotensin I-converting enzyme (ACE) activity in horses.
MedLine Citation:
PMID:  21496083     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Reasons for performing study: Studies in man have shown a correlation between Angiotensin I-converting enzyme (ACE) genetic polymorphisms, ACE activity in the blood and superior athletic performance in sports requiring endurance. It has been hypothesised that the same correlation occurs in horses. There is no information in the literature concerning the effects of training on ACE activity in equine plasma. Hypothesis: Exercise training influences the activity of circulating ACE and the response observed is dependent on the exercise protocol. Methods: Thirteen horses of mixed breeds were randomly allocated 2 different training protocols to be carried out for a period of 15 weeks. Blood samples were collected from each horse before the beginning of training to determine baseline values. Subsequent sampling took place every 15 days throughout the training phase and for 8 weeks of paddock rest. Angiotensin I-converting enzyme activity was determined by automated spectrophotometry. Results: Training for 15 weeks significantly increased plasma ACE activity, irrespective of training protocol. Differences observed in ACE activity pattern between the 2 training protocols were not statistically significant. Increase in ACE activity peaked with maximum workload. As soon as training was interrupted, ACE levels significantly decreased. Conclusions and discussion: Exercise training affects levels of ACE activity in equine plasma. The mechanism for this is not yet elucidated, but cardiovascular adaptation to exercise and blood pressure changes might be involved in this regulation. Potential relevance: Exercise training produced a gradual increase in enzymatic activity and might warrant the use of ACE as a tool for fitness monitoring. Angiotensin I-converting enzyme enzymatic activity in the plasma might be directly correlated to a change in genetic expression and that variability must be taken into account when evaluating results from horses undergoing a physical training programme.
Authors:
M F M Costa; H M Davies; G A Anderson; R F Slocombe
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-3-15
Journal Detail:
Title:  Equine veterinary journal     Volume:  -     ISSN:  0425-1644     ISO Abbreviation:  -     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-4-18     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0173320     Medline TA:  Equine Vet J     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2011 EVJ Ltd.
Affiliation:
Waikato Institute of Technology, Department of Science and Primary Industries, Hamilton, New Zealand Faculty of Veterinary Science, The University of Melbourne, Victoria, Australia.
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