The effect of the protein level in a pre-starter diet on the post-hatch performance and activation of ribosomal protein S6 kinase in muscle of neonatal broilers.
Animal Feed; Animals; Animals, Newborn; Chickens; Dietary Proteins/pharmacology; Energy Metabolism; Growth/drug effects; Muscle, Skeletal/drug effects/enzymology; Phosphorylation; Ribosomal Protein S6 Kinases/metabolism; Ribosomal Protein S6 Kinases, 90-kDa/metabolism; Weight Gain/drug effects
Abstract :
[en] The cytoplasmic serine/threonine ribosomal protein S6 kinase (S6K1) plays a critical role in controlling protein translation. There is evidence that amino acids regulate S6K1 and protein synthesis in avian species, but the effect of dietary protein level on the activation of S6K1 in neonatal chicks is unknown. Therefore, the aim of the present experiment was to investigate the effect of different protein levels, supplied during the first 5 d post-hatch, on body growth, breast muscle development and on the activation of S6K1 and its downstream target, the S6, in neonatal chicks. Chicks were fed a pre-starter diet during the first 5 d post-hatch containing low (19.6 % crude protein (CP); LP), medium (23.1 % CP; MP) or high (26.7 % CP) levels (HP) of protein. Weight gain of chicks fed the HP diet was higher (P < 0.05) compared with those fed the LP diet during day (d)3-d5 and the numerical advantage of this group was maintained from d2 to d7. On d2 and d3, greater levels of S6K1 and S6 phosphorylation and/or activity were observed in chicks receiving the HP diet compared with LP and MP diets, without differences between results of the latter two dietary treatments. In conclusion, the present results suggest that early protein nutrition impacts the development of broiler chicks.
Disciplines :
Animal production & animal husbandry
Author, co-author :
Everaert, Nadia ; KU Leuven > Department of Biosystems > Division Livestock-Nutrition-Quality
Swennen, Quirine
Coustard, Sonia Metayer
Willemsen, Hilke
Careghi, Christine
Buyse, Johan
Bruggeman, Veerle
Decuypere, Eddy
Tesseraud, Sophie
Language :
English
Title :
The effect of the protein level in a pre-starter diet on the post-hatch performance and activation of ribosomal protein S6 kinase in muscle of neonatal broilers.
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