The effect of the supplementation of a diet low in calcium and phosphorus with either sheep milk or cow milk on the physical and mechanical characteristics of bone using a rat model
Burrow, Keegan; Young, W.; Hammer, N.; Safavi, S.; Scholze, M.; McConnell, M.; Barr, D.; Reid, M.; Bekhit, Alaa E. A.
This study assessed the effect of cow milk (CM) and sheep milk (SM) consumption on the micro-structure, mechanical function, and mineral composition of rat femora in a male weanling rat model. Male weanling rats were fed a basal diet with a 50% reduction in calcium and phosphorus content (low Ca/P-diet) supplemented with either SM or CM. Rats were fed for 28 days, after which the femora were harvested and stored. The femora were analyzed by μ-CT, three-point bending, and inductively coupled plasma–mass spectrometry (ICP-MS). The addition of either milk to the low Ca/P-diet significantly increased (p < 0.05) trabecular bone volume, trabecular bone surface density, trabecular number, cortical bone volume, and maximum force, when compared to rats that consumed only the low Ca/P-diet. The consumption of either milk resulted in a significant decrease (p < 0.05) in trabecular pattern factor, and cortical bone surface to volume ratio when compared to rats that consumed only the low Ca/P-diet. The results were achieved with a lower consumption of SM compared to that of CM (p < 0.05). This work indicates that SM and CM can help overcome the effects on bone of a restriction in calcium and phosphorus intake.... [Show full abstract]
Keywordsbone; deficient diet; dairy; minerals; micro-computed tomography; inductively coupled plasma–mass spectrometry; mechanical properties; sheep; cow; inductively coupled plasma-mass spectrometry
Fields of Research090801 Food Chemistry and Molecular Gastronomy (excl. Wine); 090802 Food Engineering; 0908 Food Sciences
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