Training Affects the Collagen Framework of Subchondral Bone in Foals
article
Subchondral bone provides structural support to the overlying articular cartilage and plays an important role in osteochondral diseases. There is growing insight that the mechanical features of bone are related to the biochemistry of the collagen network. In this study the effect of exercise on water, calcium and the collagen network (total collagen, lysyl-hydroxylation, hydroxylysylpyridinoline, and lysylpyridinoline crosslinks) of subchondral bone at two differently loaded sites (site 1: intermittantly loaded; site 2: constantly loaded) is investigated in foals. Exercise influenced calcium content and levels of both types of crosslinks at site 1, but had no influence on site 2. There was no concomitant increase in lysyl-hydroxylation level with the rise in crosslinks. Levels of lysyl-hydroxylation and lysylpyridinoline crosslinking were lower at site 1 than at site 2. It is concluded that exercise affects the post-translational modifications of the collagen component of subchondral bone. Loading also appears to play a role in site-related topographical differences. The lack of any relation between the sum of pyridinoline crosslinks and the amount of triple helical hydroxylysine gives support to a recent hypothesis that lysyl-hydroxylation of the triple helix and the telopeptides are under seperate control. © 2001 Harcourt Publishers Ltd. Chemicals/CAS: Amino Acids; Calcium, 7440-70-2; Collagen, 9007-34-5; deoxypyridinoline, 90032-33-0; pyridinoline, 63800-01-1; Water, 7732-18-5
Topics
Biomedical ResearchCollagen networkHorseSubchondral boneTrainingEquus caballusamino acidcalciumcollagendeoxypyridinolinepyridinolinewateranimalanimal experimentarticlebonebone densitychemistryhorsehorse diseasemetabolismpathologyphysiologyprotein processingweight bearingAmino AcidsAnimalsBone and BonesBone DensityCalciumCollagenHorse DiseasesHorsesPhysical Conditioning, AnimalProtein Processing, Post-TranslationalWaterWeight-Bearing
TNO Identifier
236123
Repository link
ISSN
10900233
Source
Veterinary Journal, 162(1), pp. 24-32.
Pages
24-32
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