全球特征Dictyostelium discoideum在低氧条件下基因和蛋白质表达的变化
Julie Hesnard1, Elisabet Gas-Pascual2, Hanke van der Wel2
1Institut Lumière Matière, Université Claude Bernard Lyon 1, UMR5306 CNRS, Villeurbanne, France. julie.hesnard@univ-lyon1.fr.
BMC genomics
|December 30, 2025
概括
像Dictyostelium这样的原生体显示出大量的转录和蛋白质变化,以应对低氧. 这种复杂的适应涉及代谢变化和信号通路,超出了简单的生存机制.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 空气性真核生物使用氧气产生ATP,并且已经进化出缺氧诱导因子 (HIF-1) 来适应.
- 原生体缺乏依赖HIF的反应,使其缺氧适应机制在很大程度上未被探索.
研究的目的:
- 为了研究原生体中缺氧反应的规模和范围.
- 在低氧条件下对Dictyostelium的转录组和蛋白组变化进行表征.
主要方法:
- 在24小时内将社会虫Dictyostelium置于低 (1%) 氧气中,然后再氧化.
- 进行转录基因和蛋白质基因分析以量化基因和蛋白质表达的变化.
- 分析标记基因对氧气水平的反应以及蛋白质合成和线粒体的抑制剂.
主要成果:
- 32%的量化转录在缺氧期间显示出差异性表达,在早期 (1小时) 和晚期 (24小时) 阶段有显著变化.
- 蛋白质水平的变化与转录性变化有轻微的相关性,并且落后于转录性变化.
- 低氧引起了代谢途径,染色体组织,细胞循环,囊泡贩运,信号传递,特别是cAMP信号传递途径的变化.
结论:
- 低氧水平触发了Dictyostelium中转录组和蛋白质组的大规模时间重塑.
- 对缺氧的阿米巴反应涉及复杂的表达变化,超出了简单的代谢适应.
- 这表明原生体有多方面的适应策略来应对缺氧.
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