突变发生学揭示了微质细胞可以受到遗传母体影响的影响
bioRxiv : the preprint server for biology
|August 6, 2025
概括
这项研究揭示了一种晚期发生的遗传母体效应,影响斑马鱼的微质细胞发育,由sox17基因驱动. 这一发现扩大了我们对母亲基因型如何影响后代的理解.
科学领域:
- 发育生物学 发展生物学
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
背景情况:
- 孕产妇因素通过孕产妇的影响显著塑造胚胎发育.
- 母亲遗传效应通常在胚胎发育的早期表现出来,影响初始生存能力.
- 母亲的环境影响可以在一生中影响表型,但晚期发生的遗传影响是不太了解的.
研究的目的:
- 研究遗传母性对早期胚胎发生后发展的细胞类型的影响.
- 为了确定负责晚期发病的基因母性对微质细胞发育的影响的基因.
- 了解与sry相关的HMG盒子基因-17 (sox17) 在微质和黄囊前体发育中的作用.
主要方法:
- 利用斑马鱼作为模型生物来研究小质,大脑的居住免疫细胞.
- 在sox17基因中发现了一种突变,表现出母性效应表型.
- 采用CRISPR突变和高通量成像用于修饰基因的遗传查.
- 对小鼠胚胎微质进行了scRNA测序分析,以提名候选基因.
主要成果:
- 在sox17中发生的一种突变导致了小质细胞及其前体的减少,证明了晚期发生的遗传母体效应.
- sox17在母体上被加载,并以微质及其前体表达.
- 恢复sox17表达逆转了观察到的母亲效应表型.
- 确定了f11r.1,gas6和mpp1作为微质丰度的修饰剂,sox17可能调节mpp1转录.
结论:
- 微质细胞容易受到晚期发病的遗传母体影响,延伸到早期胚胎阶段之外.
- 这项研究扩大了已知的遗传母性影响的影响,包括长期的后代活力.
- 这些发现突出了母体基因型和后代发育之间的复杂相互作用,特别是在免疫细胞群中.
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