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Updated: Jan 31, 2026

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Bovine Mammary Gland Biopsy Techniques
Published on: December 23, 2018
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在哺乳期牛乳腺中受控制的周期性热应激诱导的转录组变化
G Perez-Hernandez1, M D Ellett1,2, B Pokhrel1
1School of Animal Sciences, Virginia Tech, Blacksburg, VA 24061.
JDS communications
|January 30, 2026
概括
热应激通过影响蛋白质和脂肪产量,显著降低了霍尔斯坦牛的牛奶产量. 分子分析揭示了乳腺中热冲击蛋白和蛋白质稳定路径的激活,以对抗细胞损伤.
科学领域:
- 动物科学动物科学
- 分子生物学分子生物学
- 环境生理学环境生理学
背景情况:
- 热应激 (HS) 对奶牛的生产力和福祉产生负面影响.
- 了解乳腺中的分子机制对于减轻HS影响至关重要.
研究的目的:
- 为了研究牛乳腺对热应激的分子反应.
- 为了确定受热应激影响的关键基因和通路,在中期哺乳期的荷尔斯坦牛中.
主要方法:
- 荷尔斯泰因牛被暴露在热应激 (THI 74-80) 或热中性 (THI 64) 条件下4天.
- 乳腺组织样本使用转录基因分析进行分析.
- 对差异表达的基因进行了基因本体学 (GO) 和蛋白质-蛋白质相互作用 (PPI) 分析.
主要成果:
- 热应激降低了牛奶,蛋白质和脂肪的产量.
- 转录基因分析确定了54个上调基因 (例如热冲击蛋白) 和74个下调基因 (例如DNA修复,线粒体功能基因).
- GO和PPI分析显示了蛋白质质量控制,应激反应和分子伴侣通路中的丰富.
结论:
- 热应激激活牛乳腺中的蛋白质稳定和分子陪伴系统.
- 这些细胞反应旨在减轻蛋白质错折,并在热应激条件下维持平衡.
- 研究结果提供了对热应激对乳牛生产影响的分子基础的见解.
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