Document Detail


The influence of severe prolonged exercise restriction on the mechanical and structural properties of bone in an avian model.
MedLine Citation:
PMID:  19135394     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Many studies have described the effects of exercise restriction on the mammalian skeleton. In particular, human and animal models have shown that reduction in weight bearing leads to generalised bone loss and deterioration of its mechanical properties. The aim of this study was to assess the effect of prolonged exercise restriction coupled with heavy calcium demands on the micro-structural, compositional and mechanical properties of the avian skeleton. The tibiae and humeri of 2-year-old laying hens housed in conventional caging (CC) and free-range (FR) housing systems were compared by mechanical testing and micro-computed tomography (microCT) scanning. Analyses of cortical, cancellous and medullary bone were performed. Mechanical testing revealed that the tibiae and humeri of birds from the FR group had superior mechanical properties relative to those of the CC group, and microCT scanning indicated larger cortical and lower medullary regions in FR group bones. Cancellous bone analysis revealed higher trabecular thickness and a higher bone volume fraction in the FR group, but no difference in mineral density. The biomechanical superiority of bones from the FR group was primarily due to structural rather than compositional differences, and this was reflected in both the cortical and cancellous components of the bones. The study demonstrated that prolonged exercise restriction in laying hens resulted in major structural and mechanical effects on the bird skeleton.
Authors:
Anna Shipov; Amnon Sharir; Elazar Zelzer; Joshua Milgram; Efrat Monsonego-Ornan; Ron Shahar
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Publication Detail:
Type:  Journal Article     Date:  2009-01-08
Journal Detail:
Title:  Veterinary journal (London, England : 1997)     Volume:  183     ISSN:  1532-2971     ISO Abbreviation:  Vet. J.     Publication Date:  2010 Feb 
Date Detail:
Created Date:  2010-02-01     Completed Date:  2010-03-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9706281     Medline TA:  Vet J     Country:  England    
Other Details:
Languages:  eng     Pagination:  153-60     Citation Subset:  IM    
Copyright Information:
Copyright (c) 2008 Elsevier Ltd. All rights reserved.
Affiliation:
Koret School of Veterinary Medicine, Faculty of Agricultural, Food and Environmental Quality Sciences, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel. annaship@netvision.net.il
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MeSH Terms
Descriptor/Qualifier:
Animal Husbandry / methods
Animal Nutritional Physiological Phenomena / physiology
Animals
Bone Density
Bone Density Conservation Agents / administration & dosage
Bone and Bones / physiopathology*,  radiography,  ultrastructure
Calcium, Dietary / administration & dosage
Case-Control Studies
Chickens / anatomy & histology,  physiology*
Female
Housing, Animal*
Humerus / physiology*,  radiography,  ultrastructure
Immobilization / adverse effects,  veterinary*
Nutritional Requirements
Physical Conditioning, Animal / physiology*
Tibia / physiology*,  radiography,  ultrastructure
Tomography, X-Ray Computed
Weight-Bearing / physiology
Chemical
Reg. No./Substance:
0/Bone Density Conservation Agents; 0/Calcium, Dietary
Comments/Corrections
Comment In:
Vet J. 2010 Feb;183(2):123   [PMID:  19278878 ]

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


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