Publications by authors named "Ines Niewalda"
This study investigated the hypothesis that dietary supplementation of leucine (Leu) above actual recommendations activates protein synthesis and inhibits protein degradation pathways on the molecular level and supports higher muscle growth in broilers. Day-old male Cobb-500 broilers (n = 180) were allotted to 3 groups and phase-fed 3 different corn-wheat-soybean meal-based basal diets during periods 1 to 10, 11 to 21, and 22 to 35 D. The control group (L0) received the basal diet which met the broiler's requirements of nutrients and amino acids for maintenance and growth.
View Article and Find Full Text PDFThe present study investigated the hypothesis that dietary concentrations of leucine (Leu) in excess of the breeder´s recommendations activates protein synthesis and decreases protein degradation in muscle of broilers. Day-old male Ross 308 broilers (n = 450) were phase-fed corn-soybean meal-based diets during starter (d 1-10), grower (d 11-22), and finisher (d 23-34) period. The basal diets fed to the control group (L0) met the broilers' requirements for nutrients and amino acids, and contained Leu, Leu:isoleucine (Ile) and Leu:valine (Val) ratios, close to those recommended by the breeder (Leu:Ile: 100:54, 100:52, 100:51; Leu:Val 100:64, 100:61, 100:58; in starter, grower and finisher diet, resp.
View Article and Find Full Text PDFEffects of methionine on muscle protein synthesis and degradation pathways in broilers.
J Anim Physiol Anim Nutr (Berl)
January 2019
Article Synopsis
- This study explored whether adding methionine (Met) to broiler diets boosts muscle growth through the regulation of protein synthesis and degradation pathways, with varying effects based on the Met source.
- Male Cobb-500 broilers were fed different diets with varying Met supplementation, revealing lower breast muscle weights in unsupplemented birds and some differing effects between Met sources.
- The findings indicated that while dietary Met did not significantly alter protein synthesis pathways, it did have minor effects on protein degradation markers, suggesting that Met supplementation primarily influences muscle growth through mechanisms other than direct changes in molecular pathways involved in protein synthesis.