Myosin Heavy Chain Composition, Rate of Dystrophin and Integrin Degradation and Meat Quality of Pig Longissimus thoracis and psoas major Muscles During Postmortem Aging

Dorota Wojtysiak

Abstract

This study evaluated myosin heavy chain composition and the effect of aging time (45 min, 24 h, 96 h and 168 h) on meat quality parameters and dystrophin and integrin degradation pattern in longissimus thoracis and psoas major muscles of 24 Polish Landrace fatteners slaughtered at 100 kg body weight. It was found that m. longissimus thoracis had a greater percentage of MyHC-IIB (P≤0.05) and a significantly lower percentage of type I and IIA/IIX (P≤0.05) compared with the m. psoas major. Moreover, psoas major muscle had significantly higher (P≤0.05) pH45, pH24 and lower drip loss values for 45 min to 24 h, 45 min to 96 h and 45 min to 168 h than m. longissimus thoracis. Muscle type also had a significant effect on the rate of dystrophin and integrin degradation postmortem, which were significantly (P≤0.05) more rapidly degraded in the m. longissimus thoracis compared to the m. psoas major. It is concluded from the obtained results that the muscles with a greater percentage of MyHC-IIB show lower pH values, which translates into more rapid rate of integrin and dystrophin degradation. Ultimately, this may contribute to higher drip loss values during refrigerated storage.
Author Dorota Wojtysiak (DoAS / HBZ-KRiAZ)
Dorota Wojtysiak,,
- Department of Animal Reproduction and Anatomy
Journal seriesAnnals of Animal Science, ISSN 1642-3402, e-ISSN 2300-8733, (N/A 100 pkt)
Issue year2020
Vol20
No1
Pages231-243
Publication size in sheets0.6
Keywords in Englishcold storage; myosin heavy chain isoforms; protein degradation; meat quality; pig
ASJC Classification3403 Food Animals; 3404 Small Animals; 1103 Animal Science and Zoology
DOIDOI:10.2478/aoas-2019-0062
URL https://content.sciendo.com/configurable/contentpage/journals$002faoas$002f20$002f1$002farticle-p231.xml
Languageen angielski
LicenseJournal (articles only); author's original; Uznanie Autorstwa - Użycie Niekomercyjne - Bez utworów zależnych (CC-BY-NC-ND); after publication
Score (nominal)100
Score sourcejournalList
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2018 = 0.869; WoS Impact Factor: 2018 = 1.515 (2) - 2018=1.246 (5)
Citation count*
Additional fields
FinansowanieThis study was supported by NCRD, project “ENERGYFEED”, BIOSTRATEG/297910/ NCBR/2016.
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