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Impaired mechanical strength of bone in experimental copper deficiency

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Jonas, J, Burns, J, Abel, EW, Cresswell, MJ, Strain, JJ and Paterson, CR (1993) Impaired mechanical strength of bone in experimental copper deficiency. Annals of Nutrition and metabolism, 37 (5). pp. 245-252. [Journal article]

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Abstract

Copper, through its role as cofactor for lysyl oxidase, is essential for intra- and inter-molecular cross-links in collagen. Copper deficiency, in man and in animals, is associated with bone fragility ascribed to defective cross-links. To assess bone strength in copper-deficient animals, we designed a sensitive torsion-testing apparatus according to biomechanical considerations. Femora from 7 copper-deficient rats and from their pair-fed controls were tested in torsional loading until fracture. Significant decreases in the maximal sustained torque (t = 2.93, p < 0.05), in the ultimate angular deformation (t = 2.52, p < 0.05) and in the toughness (t = 2.88, p < 0.05) were demonstrated. In a complementary study, it was shown that the ash weight and the calcium content of the femora from the copper-deficient animals did not differ from those of the controls. It was likely, therefore, that the impaired mechanical strength was related to defects in the collagen component of bone.

Item Type:Journal article
Faculties and Schools:Faculty of Life and Health Sciences
Faculty of Life and Health Sciences > School of Biomedical Sciences
Research Institutes and Groups:Biomedical Sciences Research Institute
Biomedical Sciences Research Institute > Northern Ireland Centre for Food and Health (NICHE)
ID Code:5295
Deposited By:Mrs Alison Deehan
Deposited On:14 Jan 2010 15:12
Last Modified:22 Aug 2012 11:06

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