Growth dependent changes in the chemical composition of proximal tibial articular cartilage and growth plate of broiler chickens
1995
Nakano, T. | Sim, J.S.
Chemical composition of the proximal tibial articular cartilage and growth plate of broiler chickens from seven age groups (1, 8, 14, 22, 29, 36, and 43 d old) was studied. In the articular cartilage, the contents of dry matter, collagen measured as hydroxyproline, and keratan sulfate increased (P < 0.05), and the content of sialic acid decreased (P < 0.05) as age advanced. The content of chondroitin sulfate measured as uronic acid and the proportion of hyaluronic acid in total glycosaminoglycan (GAG) were relatively constant (P > 0.05) among the age groups. In the growth plate, the contents of chondroitin sulfate and keratan sulfate increased (P < 0.05) with age, while the contents of dry matter, sialic acid, and collagen were similar among the age groups. The proportion of hyaluronic acid in total GAG decreased at the age of 8 d, and remained relatively constant thereafter. The growth dependent changes observed in the concentration of chondroitin sulfate in the broiler chicken cartilage were different from those in other species which have been reported to show a decrease during early postnatal growth.
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