在耐火性的实验模型的海马体中DNA5基甲基化模式的变化
bioRxiv : the preprint server for biology
|October 24, 2023
概括
在叶 (TLE) 中,表观遗传标记5-hydroxymethylcytosine (5-hmC) 减少. 操纵5-hmC水平,特别是通过TET1,会影响发作的易感性,这表明的治疗潜力.
科学领域:
- 神经科学是一个神经科学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 分子生物学分子生物学
背景情况:
- 叶 (TLE) 涉及源自海马的反复发作,与表观遗传变化和改变的基因转录有关.
- DNA 5-甲基细胞氨酸 (5-mC) 与慢性有关,但5-甲基细胞氨酸 (5-hmC) 在TLE中的作用尚不清楚.
- 5-hmC是一种大脑丰富的表观遗传标记,调节基因表达.
研究的目的:
- 为了研究5-hmC在TLE患者的海马体中的作用和分布,以及TLE大鼠模型.
- 探索TLE中5-hmC,TET1和发作易感性之间的机制联系.
主要方法:
- 在人类TLE海马体和Kainic acid (KA) 诱导的TLE大鼠模型中量化大量DNA5-hmC和5-mC水平.
- 使用5-hmC hMeDIP测序进行全基因组的5-hmC 分析.
- 在生体中操纵大鼠海马中的Tet1表达 (敲击和过度表达).
主要成果:
- 在人类TLE患者的海马体和KA TLE大鼠模型中观察到显著降低的大量DNA5-hmC水平,但不是5-mC.
- 5-hmC hMeDIP测序揭示了5-hmC在基因间区域的双向调节,与相关的基因相关 (例如,Gal,SV2,Kcnj11,Gad65,TLR4,Bdnf).
- 1突击降低了海马5-hmC和增加了发作易感性,而1过度表达增加了5-hmC和增强了发作弹性.
结论:
- 在TLE中,5-hmC在海马体显著降低,并在调节发作易感性方面发挥关键作用.
- 通过Tet1调节5-hmC水平,影响的结果.
- 5-hmC是TLE治疗干预的潜在表观遗传标.
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