高级检索

m⁶A修饰调控海马齿状回神经发生及其在缺血性脑卒中中的研究进展

Research progress on m⁶A modification in regulating neurogenesis in the hippocampal dentate gyrus and its role in ischemic stroke

  • 摘要: 缺血性脑卒中(ischemic stroke, IS)是导致死亡和残疾的主要疾病,目前临床治疗手段有限。内源性神经干细胞(neural stem cells, NSCs)介导的海马成体神经发生,为IS后的神经功能修复提供了新的治疗策略。N6-甲基腺苷(N6-methyladenosine, m⁶A)是真核生物mRNA中最普遍的内部化学修饰,通过其“书写器”、“擦除器”和“阅读器”动态调控基因表达。研究表明,m⁶A修饰在维持海马NSCs静息与增殖平衡、决定其分化命运以及促进新生神经元成熟与整合中发挥核心作用。IS发生后,脑内m⁶A修饰水平及相关酶表达发生显著改变,这些变化可能通过影响RNA代谢,调控神经发生的各个阶段,从而影响脑损伤修复与认知功能恢复。本文系统综述了m⁶A修饰调控海马成体神经发生的分子机制,梳理了IS后脑内m⁶A修饰的动态变化,并在此基础上提出m⁶A可能是连接缺血性脑损伤与海马成体神经发生的关键分子枢纽这一假说。最后,本文分析了当前研究的核心局限,并从技术发展、临床转化等角度对未来研究方向进行了展望。

     

    Abstract: Ischemic stroke (IS) is a major disease leading to death and disability, with currently limited clinical treatment options. Adult hippocampal neurogenesis mediated by endogenous neural stem cells (NSCs) offers a new therapeutic strategy for neurological functional recovery after IS. N6-methyladenosine (m⁶A), the most prevalent internal chemical modification in eukaryotic mRNA, dynamically regulates gene expression through its "writers, " "erasers, " and "readers." Studies have shown that m⁶A modification plays a central role in maintaining the balance between quiescence and proliferation of hippocampal NSCs, determining their differentiation fate, and promoting the maturation and integration of newborn neurons. Following IS, m⁶A modification levels and the expression of related enzymes in the brain undergo significant changes. These alterations may influence various stages of neurogenesis by regulating RNA metabolism, thereby affecting brain damage repair and cognitive functional recovery. This article systematically reviews the molecular mechanisms by which m⁶A modification regulates adult hippocampal neurogenesis, outlines the dynamic changes in m⁶A modification in the brain after IS, and proposes the hypothesis that m⁶A may serve as a key molecular hub linking ischemic brain injury and adult hippocampal neurogenesis. Finally, this article analyzes the core limitations of current research and discusses future research directions from the perspectives of technological development and clinical translation.

     

/

返回文章
返回