Intramuscular collagen characteristics and expression of related genes in skeletal muscle of cull cows receiving a high-energy diet.

Autor: Fontes MMDS; Department of Animal Science, Universidade Federal de Vicosa, 36570-900 Viçosa, MG, Brazil; Muscle Biology and Nutrigenomics Laboratory, Universidade Federal de Viçosa, 36570-900, Viçosa, MG, Brazil., Costa TC; Department of Animal Science, Universidade Federal de Vicosa, 36570-900 Viçosa, MG, Brazil; Muscle Biology and Nutrigenomics Laboratory, Universidade Federal de Viçosa, 36570-900, Viçosa, MG, Brazil., Lopes MM; Department of Animal Science, Universidade Federal de Vicosa, 36570-900 Viçosa, MG, Brazil; Muscle Biology and Nutrigenomics Laboratory, Universidade Federal de Viçosa, 36570-900, Viçosa, MG, Brazil., Souza RO; Department of Animal Science, Universidade Federal de Vicosa, 36570-900 Viçosa, MG, Brazil; Muscle Biology and Nutrigenomics Laboratory, Universidade Federal de Viçosa, 36570-900, Viçosa, MG, Brazil., Carneiro LS; Department of Animal Science, Universidade Federal de Vicosa, 36570-900 Viçosa, MG, Brazil; Muscle Biology and Nutrigenomics Laboratory, Universidade Federal de Viçosa, 36570-900, Viçosa, MG, Brazil., Paulino PVR; Cargill Animal Nutrition, 13091-611, Campinas, SP, Brazil., Chizzotti ML; Department of Animal Science, Universidade Federal de Vicosa, 36570-900 Viçosa, MG, Brazil., Silva FF; Department of Animal Science, Universidade Federal de Vicosa, 36570-900 Viçosa, MG, Brazil., Serão NVL; Department of Animal Science, Iowa State University, 50011, Ames, IA, United States., Duarte MS; Department of Animal Science, Universidade Federal de Vicosa, 36570-900 Viçosa, MG, Brazil; Muscle Biology and Nutrigenomics Laboratory, Universidade Federal de Viçosa, 36570-900, Viçosa, MG, Brazil. Electronic address: marcio.duarte@ufv.br.
Jazyk: angličtina
Zdroj: Meat science [Meat Sci] 2021 Jul; Vol. 177, pp. 108495. Date of Electronic Publication: 2021 Mar 13.
DOI: 10.1016/j.meatsci.2021.108495
Abstrakt: We aimed to investigate differences in the synthesis and metabolism of intramuscular collagen in the Longissimus thoracis (LT) muscle between heifers and cull-cows fed high-energy diet. Ten cull-cows, (74.9 ± 3.2 months age, weighing 536 ± 14.55 kg) and ten heifers (18.4 ± 3.2 months age, weighting 310.5 ± 14.5 kg) were fed with high-energy diets for 150 days. The total collagen content did not differ between treatments. Greater collagen solubility was observed in heifers than cull-cows, although no differences in lysyl oxidase activity were observed between treatments. No differences were observed for mRNA expression of CO1A1, MMP2, MMP9 and TIMP2 between treatments. However, cull-cows presented greater mRNA expression of COL3A1, TIMP1 and TIMP3 than heifers. Our data give no indication that feeding a high-energy diet to cull-cows decreases the concentration of intramuscular collagen in the LT muscle or increases its solubility in respect to the collagen solubility in LT muscles from heifers on the same diet.
(Copyright © 2021. Published by Elsevier Ltd.)
Databáze: MEDLINE
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