数字农科院2.0

Changes of Ca2+ release through ryanodine receptor 1 in pork under different postmortem chilling rates

文献类型: 外文期刊

作者: Zhiyuan Xiao;Yuqian Xu;Yuqiang Bai;Xin Li;Shaobo Li;Shanshan Liu;Dequan Zhang;Chengli Hou

作者机构:

关键词: Ca2+ release;Chilling rates;Pork;Ryanodine receptor 1;Tenderness

期刊名称: Food Bioscience

ISSN: 2212-4292

年卷期: 2024 年 61 卷

页码:

收录情况: SCIE(2024版) ; ; 农林核心(2020版)

摘要: The role of postmortem chilling rate in regulating Ca2+ release through ryanodine receptor 1 (RyR1) in pork microstructure and tenderness were evaluated. The pork was allocated to the low chilling rate (LCR, 4.26 °C/h), medium chilling rate (MCR, 8.89 °C/h), and high chilling rate (HCR, 13.33 °C/h) group. Sarcomere super-contraction and fiber damage were obtained in HCR samples, leading to the lowest shear force (P < 0.05). Under HCR, Ca2+ concentration significantly increased in sarcoplasm and decreased in sarcoplasmic reticulum were found at 2–5 h postmortem compared to other groups (P < 0.05). RyR1 and dihydropyridine receptor (DHPR) levels were higher and 12 kDa FK506 binding protein (FKBP12) level was lower in HCR samples at 6 h postmortem (P < 0.05). Therefore, HCR (13.33 °C/h) may enhance Ca2+ release by up-regulating RyR1 level with DHPR activation increasing and FKBP12 inhibition decreasing, causing myofibril damage from sarcomere super-contraction to improve pork tenderness at early postmortem.

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