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Long-term supplementation of various dietary lipids alters bone mineral content, mechanical properties and histological characteristics of Japanese quail

Author:
Liu, D., Veit, H.P., Wilson, J.H., Denbow, D.M.
Source:
Poultry science 2003 v.82 no.5 pp. 831-839
ISSN:
0032-5791
Subject:
Japanese quails, poultry feeding, dietary fat, feed supplements, soybean oil, hydrogenated oils, menhaden oil, animal fats and oils, body weight, feed intake, tibia, ash content, fatty acid composition, omega-3 fatty acids, omega-6 fatty acids, bone strength, mineral content, bone density, histology, nutrition physiology
Abstract:
The purpose of this study was to investigate the effects of long-term supplementation of fat in the diets on the fatty acid composition, chemical, mechanical, and histological properties of tibial bone. Month-old male Japanese quail were fed a basal diet containing either soybean oil (SBO), hydrogenated soybean oil (HSBO), chicken fat (CF), or menhaden fish oil (FO) at 50 g/kg of the diet and maintained on these diets for 7 mo. Lipid treatments did not affect body weight, food intake, tibial length, or diameter. The FO diet group had the highest percentage of tibial ash, and both the FO and HSBO significantly increased tibial mineral content compared to those given SBO or CF. The type and amount of fatty acids in the diets had a profound influence on fatty acid composition of lipids in tibial cortical bones. Quail fed FO had the highest concentration of (n-3) fatty acids, and those fed SBO were highest in (n-6) fatty acids. The HSBO diet, containing high level of trans-fatty acids, led to the accumulation of these fatty acids in bone. In quail, long-term supplementation of FO or HSBO increased tibial shear force and shear stress and improved histological cortical thickness and density when compared to those given SBO or CF. These results suggest that long-term exposure to a FO or HSBO diet have a significant beneficial effect on bone metabolism.
Agid:
1351064