再生回顾了许多胚胎过程,包括重新使用发育调节区域
bioRxiv : the preprint server for biology
|July 15, 2024
概括
再生和胚胎发育共享共同的基因调节元素,尽管伤口反应不同. 这项对Hofstenia miamia的研究揭示了保存的模式和差异化机制,为再生进化提供了洞察力.
科学领域:
- 进化生物学是进化的生物学.
- 发育生物学是发展生物学.
- 再生医学是一种再生医学.
背景情况:
- 动物具有广泛的再生能力,但其进化起源尚不清楚.
- 全身再生和胚胎发育的共同目标是形成一个身体计划,这表明过程可能会重叠.
- 以前的研究表明,发育和再生之间有共同的基因表达,但功能和机械联系是未知的.
研究的目的:
- 通过比较发育和再生过程来研究再生的进化历史.
- 确定发育和再生之间共享的基因表达特征是否与共享的功能相对应.
- 确定在再生过程中重新激活发育基因的机制.
主要方法:
- 在单细胞分辨率下进行比较的转录组学研究,在Hofstenia miamia. acoel中.
- 功能验证再生和发展过程.
- 染色体可访问性分析以确定调节区域和转录因子结合位.
主要成果:
- 模式和细胞分化过程显示出发育和再生之间存在显著的相似性.
- 与发展相比,伤口反应计划在再生方面表现出不同的动态.
- 参与发育和再生的基因通常由相同的调节区域控制,这表明保留了 cis-regulatory 元素.
结论:
- 发展和再生共享保存的模式和差异化的监管机制,超越了单纯的转录基因相似性.
- 独特的伤口反应动态突出显示了再生过程中的特定适应.
- 确定了监管区域和约束地点,为未来关于再生演变和机制的研究提供了资源.
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