脑中风导致DNA甲基化 在脑中的Ncx1心脏促进体通过DNMT1/MeCP2/REST表观遗传综合体
Natascia Guida1, Angelo Serani1, Luca Sanguigno1
1Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine "Federico II" University of Naples Naples Italy.
Journal of the American Heart Association
|March 8, 2024
概括
破坏DNMT1/MeCP2/REST复合体可能会减少中风后大脑DNA甲基化. 这可能是一个新的策略,通过向Ncx1心脏促进器来减少中风引起的神经元损伤.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 抑制剂元素1沉默转录因子 (REST) 通常通过大脑促进剂 (Br) 抑制神经元中的Ncx1转录.
- 在Ncx1心脏促进体 (Ht) 中的一个新的RE1位点 (Ht-RE1) 也影响神经元Ncx1转录.
- REST将DNA-甲基转移酶-1 (DNMT1) 和MeCP2引入神经元基因,促使人们对它们在中风后Ncx1调节中的作用进行调查.
研究的目的:
- 研究DNMT1/MeCP2/REST复合体在中风后大脑中调节Ncx1转录中的作用.
- 为了确定这种复杂的向是否可以减轻中风引起的神经元损伤.
主要方法:
- 路西法酶在SH-SY5Y细胞中进行测试,以评估促进体活性.
- 在Ht-RE1位点的位点定向突变发生.
- 在中风后的小鼠大脑中分析DNMT1,MeCP2和REST结合和DNA甲基化.
- 在遭受中风的小鼠体内注射siREST.
- 在遭受氧气-葡萄糖剥夺的皮质神经元中,Ncx1的敲击.
主要成果:
- 在细胞实验中,REST 降低了 Br 活性,而 DNMT1,MeCP2 和 REST 降低了 Ht 活性.
- Ht-RE1的突变发生阻断了依赖REST的Ncx1下调.
- 在小鼠中,中风增加了DNMT1,MeCP2和REST与Ht促进体的结合,导致过甲基化.
- siREST注射减少了DNMT1/MeCP2的结合,防止了Ncx1的下调,并减少了中风损伤.
- 在受到压力的皮层神经元中,Ncx1的敲击抵消了由5-azacytidine对神经保护的作用.
结论:
- DNMT1/MeCP2/REST复合体在中风后的大脑中Ncx1转录调节和DNA甲基化中发挥着关键作用.
- 破坏这个复合体,可能是通过药理手段,提供了一种新的策略来减少大脑DNA甲基化和改善中风损伤.
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