了解更高雌激相关温度 (HEAT) 的直接影响的一步:在直接暴露于急性升高温度的积卵细胞复合体中转录水平的变化
Jessica L Klabnik1, Jonathan E Beever1,2, Rebecca R Payton1
1Department of Animal Science, University of Tennessee Institute of Agriculture, Knoxville, TN 37996, USA.
Animals : an open access journal from MDPI
|February 26, 2025
概括
在体外成熟 (IVM) 过程中体温升高 (HEAT) 迅速影响牛卵细胞中的关键基因转录. 这些分子变化表明卵细胞的成熟加速,为女性生殖生理学提供了洞察力.
科学领域:
- 生殖生物学 生殖生物学
- 分子内分泌学分子内分泌学
- 卵细胞生物学 卵细胞生物学
背景情况:
- 升高的体温 (HEAT) 是一个正常的生理状况在性感受性雌性牛在周卵期期间.
- 了解HEAT对卵细胞质量和成熟的分子影响对于繁殖成功至关重要.
研究的目的:
- 调查在体外成熟 (IVM) 过程中急性热暴露 (41°C) 对牛卵细胞基因表达的直接和延迟影响.
- 为了识别涉及类固醇生成,卵细胞成熟和热反应的特定转录.
主要方法:
- 使用向RNA测序来分析累积卵细胞复合体 (COC) 中的转录组变化.
- 卵子在IVM期间暴露在41°C,在不同的时间点 (0-6小时) 和恢复 (4-18小时) 中进行分析.
- 多维缩放图用于样本可视化和分析.
主要成果:
- 显著的大多数转录 (72.3%) 在IVM暴露在41°C的前2-4小时内受到影响.
- 直接暴露于热量会改变与孕激素产生,生殖囊泡分解,介质进展,细胞周期和排卵有关的转录.
- 三个成绩单显示延迟效应,只有在康复4小时后变化才明显.
结论:
- 在IVM期间的急性热应激迅速改变了牛卵细胞的分子特征,表明成熟的加速.
- 这些发现为COCs对雌性牛的热应激的动态生理反应提供了新的见解.
- 了解这些分子动态对于改善辅助生殖技术和管理牲畜热应激至关重要.
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