循环高环境温度对肉肌肉伊米达二含量的影响
Ayumi Katafuchi1, Mizuki Kamegawa1, Serina Goto2
1Graduate School of Agriculture, Forestry and Fisheries, Kagoshima University, 1-21-24 Korimoto, Kagoshima 890-0065, Japan.
The journal of poultry science
|February 2, 2024
概括
在肉中,高环境温度降低了像肉和素这样的伊米达二. 热应激会影响合成和降解的基因表达,影响肌肉组成.
科学领域:
- 动物科学动物科学
- 禽类生理学 禽类生理学
- 生物化学 生物化学
背景情况:
- 伊米达二,包括肉氨酸和氨酸,在动物的肌肉功能和抗氧化防御中起着至关重要的作用.
- 肉容易受到热应激,这可能会对其生长,健康和肉质产生负面影响.
研究的目的:
- 为了研究慢性热暴露对肉肌肉伊米达二 (carnosine,antherine,balenine) 度的影响.
- 在热应激条件下探索潜在的分子机制,特别是参与伊米达二合成和降解的酶的基因表达.
主要方法:
- 肉在四周内被置于热中性 (25°C) 或周期性高环境温度 (35°C每天8小时) 的条件下.
- 对肌肉组织 (胸部) 进行了分析,以检测肉素,素和巴列素的含量.
- 使用定量PCR测量了肉合成酶1和肉酶2的mRNA表达水平.
主要成果:
- 与对照组相比,暴露在高环境温度下的肉在他们的胸肌中显示出相对较低的安瑟林和卡诺辛度.
- 在这两组实验组的胸肌中,Balenine在两组实验组的胸肌中都无法检测.
- 暴露于热量的表现出1类卡诺辛合成酶的mRNA表达减少 (合成) 和2类卡诺辛酶的mRNA表达增加 (降解).
结论:
- 暴露于热量会显著降低肉胸肌中的伊米达二含量.
- 观察到的下降可能是由于基因表达的改变,包括减少合成和加强了肉素和素的降解.
- 这些发现突出了一个潜在的生化机制,热应激会影响肉肉的质量和生理状态.
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