数字农科院2.0

Effect of mitochondrial calcium homeostasis-mediated endogenous enzyme activation on tenderness of beef muscle based on MCU modulators

文献类型： 外文期刊

作者： Zhenjiang Ding;Chunmei Liu;Zihan Zhang;Chunhui Zhang;Feng Huang

作者机构：

关键词： Endogenous enzyme;Mitochondrial calcium homeostasis;Mitochondrial dysfunction;Oxidative stress;Tenderness

期刊名称： Food Chemistry: X

ISSN： 2590-1575

年卷期： 2024 年 22 卷

页码：

收录情况： SCIE（2024版） ; ; EI（2024版）

摘要： The mitochondrial calcium uniporter (MCU) occupies a noteworthy position in the regulation of mitochondrial calcium uptake. This study investigated the effects of MCU modulator-mediated mitochondrial calcium on mitochondrial dysfunction, oxidative stress, endogenous enzyme activities, and tenderness during postmortem aging. Spermine, as an activator of MCU, resulted in an increase in mitochondrial calcium levels, not only disrupting mitochondrial morphology but also triggering mitochondrial oxidative stress and downregulation of antioxidant factors. Additionally, the spermine group underwent later activation of calpain and earlier activation of caspases, as well as the myofibril fragmentation index was initially lower and then higher compared with control group, indicating that endogenous enzymes played an indispensable role in different aging periods. Interestingly, the results of the Ru360 (an inhibitor of MCU) group were opposite to those aforementioned findings. Our data provide a novel perspective on the regulatory mechanism of mitochondrial calcium homeostasis mediated by MCU on tenderness.

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