矩阵金属蛋白酶-9可能会在牛肉的死后老化过程中导致原体结构的改变
Larissa A Koulicoff1, Terra Heilman1, Lauren Vitanza1
1Kansas State University, Department of Animal Sciences and Industry, Manhattan, KS 66506, USA.
Meat science
|August 29, 2023
概括
矩阵金属蛋白酶 (MMPs),特别是MMP-9,在牛肉老化过程中活跃,降解结缔组织. 补充剂增强MMP-9活性,可能改善肉质.
科学领域:
- 肉类科学 肉科学
- 生物化学 生物化学
- 动物营养 动物营养
背景情况:
- 矩阵金属蛋白酶 (MMPs) 调节活体动物的结合组织循环.
- 牛肉死后老化和结缔组织退化中MMPs的作用尚未完全理解.
研究的目的:
- 为了描述在 postmortem 牛肉老化期间的 MMP 活性.
- 调查本地牛肉MMPs对结缔组织退化的贡献.
- 探索增强MMP活性的方法,并评估补充剂对MMP活性的影响.
主要方法:
- 在老化期 (3-63天) 中分析牛肉肌肉 (长腰,中,胃半) 中的MMP活性.
- 使用Western Blot.确定负责原体降解的特定MMP.
- 模拟的老化实验,有或没有化 (ZnCl2) 的添加.
- 对牛肉中MMP活性进行比较,牛肉补充了超营养含量,与对照饮食相比.
主要成果:
- 在整个死后衰老过程中检测到MMP活性,MMP-9被确定为关键的原体降解酶.
- 在模拟条件下老化42天后,MMP-9活性变得明显.
- 在模型系统中,添加ZnCl2显著增加了MMP-9活性 (P<0.01).
- 牛肉补充了超营养,显示增加了的可用性和MMP-9活性 (P <0.05).
结论:
- MMP-9在 postmortem 牛肉衰老和结缔组织退化中起着重要作用.
- 补充剂可以增强牛肉中的MMP-9活性.
- 对MMP-9机制的进一步研究可以为改善低质量牛肉切片连接组织管理的策略提供信息.
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