Comparison of oxidative stress-mitochondria-mediated tenderization in two different bovine muscles during aging

IF 4.1 Q2 FOOD SCIENCE & TECHNOLOGY Food Chemistry Molecular Sciences Pub Date : 2022-12-30 DOI:10.1016/j.fochms.2022.100131

Zhenjiang Ding , Qichao Wei , Chunmei Liu , Chunhui Zhang , Feng Huang

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引用次数: 1

Abstract

The aim of this study was to investigate the differences in the effects of mitochondria-involved energy metabolism and caspases activation on postmortem tenderness in different muscle fiber types. Beef Longissimus thoracis (LT) and Psoas major (PM) muscles showed significant difference in mitochondrial function. Our data revealed that PM suffered from higher levels of reactive oxygen species (ROS) earlier than LT, causing faster mitochondrial swelling and rupture. Additionally, faster metabolism of ATP-related compounds and activation of caspase-9 appeared in PM, but the activity of caspase-3 in PM was lower than that in LT. Differences in myofibril fragmentation index (MFI) of LT and PM at different aging stages suggested that energy metabolism and caspases activities may play a role in tenderness at different aging stages. These results indicated that oxidative stress-mitochondria-mediated tenderization process could be muscle-specific.

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氧化应激-线粒体介导的两种不同牛肌肉衰老过程中嫩化的比较

本研究的目的是探讨线粒体参与的能量代谢和半胱天冬酶激活对不同肌肉纤维类型死后压痛的影响差异。牛肉胸最长肌(LT)和大腰肌(PM)线粒体功能差异显著。我们的数据显示，PM比LT更早遭受更高水平的活性氧(ROS)，导致线粒体肿胀和破裂更快。此外，PM中atp相关化合物的代谢和caspase-9的激活均较快，而PM中caspase-3的活性低于LT。不同衰老阶段LT和PM肌原纤维断裂指数(MFI)的差异提示不同衰老阶段能量代谢和caspase活性可能在嫩痛中起作用。这些结果表明，氧化应激-线粒体介导的嫩化过程可能是肌肉特异性的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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