在高度再生的元动物中保存的基因与平面再生有关
Shankar C R R Chereddy1, Takashi Makino1
1Graduate School of Life Sciences, Tohoku University, Sendai 980-8578, Japan.
Genome biology and evolution
|April 23, 2024
概括
该研究确定了与再生相关的Cnidaria和Bilateria中的保存基因,这表明随着时间的推移失去的共同祖先机制. 这些基因对于高度再生的物种的全身再生至关重要.
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.
- 遗传学 是一个遗传学.
背景情况:
- 转生动物表现出多样化的再生能力,促使人们对它们的进化起源进行调查.
- 虽然像海绵这样的早期甲基动物能很好地再生,但与Cnidaria和Bilateria相比,复杂性的差异表明了不同的机制.
- 一个假设认为,Cnidaria和Bilateria的共同祖先具有显著的再生能力,随后在进化过程中丢失.
研究的目的:
- 识别在Cnidaria和Bilateria中再生至关重要的基因,这些基因可能是从共同的祖先中继承的.
- 调查基因生物进化过程中再生能力的丧失或保留背后的分子机制.
主要方法:
- 使用多途径BLAST和基因谱的比较基因组学来识别保存和丢失的基因.
- 昆虫类和双胞胎类分为全身再生,高再生能力和低再生能力的组.
- 转录因子分析以确定与再生基因相关的调节元素.
- RNA干扰 (RNAi) 来评估已识别的基因在再生中的功能作用.
主要成果:
- 确定了"Cnidaria和双边再生基因",在高度再生物种中保存,在再生能力较低的物种中缺席.
- 发现与这些再生基因相关的家庭主区调节元件的丰富.
- RNAi实验表明,特定基因 (HRJDa,HRJDb,DUF21,DISP3,ARMR) 的淘汰会损害或取消再生.
- 在再生的早期,DUF21 knockdown 已被证明是致命的,这表明它在伤口反应中发挥了作用,而其他人则影响了截肢后的再生.
结论:
- 已确定的"Cnidaria和双边再生基因"在这些群体内的高度再生物种的再生过程中发挥着重要作用.
- 这些发现支持了在Cnidaria和 Bilateria中再生的共同,祖先保存的分子机制的假设,其中的部分已经在进化过程中丢失了.
- 这项研究提供了对再生的遗传基础及其进化轨迹的洞察力.
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