由于不适当地遗传的组织素甲基化,子宫外转录可能会干扰终端分化的细胞的持续功能
bioRxiv : the preprint server for biology
|November 14, 2023
概括
基因组修饰酶的突变可能导致神经发育障碍. 在C. elegans中,阻断完整的神经系统的成年的异胎基因表达,挽救了行为缺陷,这表明了潜在的治疗途径.
科学领域:
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 神经生物学 神经生物学 神经生物学
- 发展生物学 发展生物学
背景情况:
- 基因组修饰酶的突变与神经发育障碍有关,但潜在的机制尚不清楚.
- 基因组蛋白修饰在发育过程中和神经系统中调节基因表达起着至关重要的作用.
研究的目的:
- 在一个模型生物体中研究特定基因组修饰酶 (SPR-5/Lsd1和MET-2/Setdb1) 突变的功能后果.
- 探索基因表达错误,神经系统功能和行为缺陷之间的关系.
主要方法:
- 使用C. elegans双重突变模型,将spr-5 (H3K4me1/2脱甲基酶) 和met-2 (H3K9甲基转移酶) 的突变结合起来.
- 评估行为表型,特别是化学反应,并分析基因表达模式,重点关注体质组织中的生殖基因活性.
- 研究了基因表达的时间控制对行为的影响.
主要成果:
- 这种spr-5;met-2双突变体由于体细胞中生殖系基因的异卵性表达而表现出严重的化学反应缺陷.
- 尽管有行为缺陷,但突变虫的胚胎血统变化很小,成年人的神经系统完好无损.
- 在成年虫中逆转子宫外生殖系基因表达恢复了正常的化学反应,表明缺陷是由于正在进行的转录问题.
结论:
- 即使在完整的神经系统中,持续的不适当的转录也会导致行为缺陷.
- 这些发现表明,与基因素修饰酶突变相关的神经发育障碍可能源于异位转录,并可能是可逆的.
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