Hostname: page-component-77f85d65b8-8wtlm Total loading time: 0 Render date: 2026-03-28T20:19:04.835Z Has data issue: false hasContentIssue false

Differences in skeletal muscle proteolysis in Nellore and Angus cattle might be driven by Calpastatin activity and not the abundance of Calpain/Calpastatin

Published online by Cambridge University Press:  09 November 2017

T. S. MARTINS
Affiliation:
Department of Animal Science, Universidade Federal de Viçosa, Viçosa-MG, Brazil
L. M. P. SANGLARD
Affiliation:
Department of Animal Science, Iowa State University, Ames-IA, USA
W. SILVA
Affiliation:
Department of Animal Science, Universidade Federal de Viçosa, Viçosa-MG, Brazil
M. L. CHIZZOTTI
Affiliation:
Department of Animal Science, Universidade Federal de Viçosa, Viçosa-MG, Brazil
M. M. LADEIRA
Affiliation:
Department of Animal Science, Universidade Federal de Lavras, Lavras-MG, Brazil
N. V. L. SERÃO
Affiliation:
Department of Animal Science, Iowa State University, Ames-IA, USA
P. V. R. PAULINO
Affiliation:
Cargill Animal Nutrition, Campinas-SP, Brazil
M. S. DUARTE*
Affiliation:
Department of Animal Science, Universidade Federal de Viçosa, Viçosa-MG, Brazil
*
*To whom all correspondence should be addressed. Email: marcio.duarte@ufv.br

Summary

The present study aimed to explore the molecular factors underlying differences in Calpain/Calpastatin proteolytic system in Nellore and Angus cattle. Longissimus muscle samples were collected in Nellore (n = 6; body weight (BW) = 373 ± 37·3 kg) and Angus (n = 6; BW = 383 ± 23·9 kg) cattle at slaughter for analysis of gene and protein expression, and Calpastatin enzyme activity. Additionally, the myofibrillar fragmentation index was used to quantify the extension of proteolysis in longissimus muscle samples. A greater myofibrillar fragmentation was observed in skeletal muscle of Angus compared with Nellore cattle. Conversely, no differences were found between breeds for mRNA expression of Calpain 1 (CAPN1) and Calpastatin (CAST). Similarly, no differences were observed for the abundance of Calpain and Calpastatin proteins between skeletal muscles of Nellore and Angus cattle. Despite the lack of differences in mRNA and protein abundance, a greater activity of Calpastatin was observed in skeletal muscle of Nellore compared with Angus cattle. These data indicate that the greater proteolysis in skeletal muscle of Angus compared with Nellore cattle is mainly driven by a greater Calpastatin activity rather than Calpain or Calpastatin mRNA and protein expression.

Information

Type
Animal Research Papers
Copyright
Copyright © Cambridge University Press 2017 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable