失去KDM5A介导的H3K4me3脱甲基化,通过Wnt/β-catenin通路激活促进异常的神经发育
Jianting Li1, Yuxiang Liang1,2, Zhihua Cao1
1Department of Biochemistry and Molecular Biology, College of Basic Medicine, Shanxi Key Laboratory of Birth Defect and Cell Regeneration, MOE Key Laboratory of Coal Environmental Pathogenicity and Prevention, Shanxi Medical University, Taiyuan, China.
Cell death & disease
|November 20, 2025
概括
叶酸缺乏会增加Wnt目标基因的表观遗传标记,激活Wnt信号,并导致神经管缺陷 (NTD). 减少KDM5A的表达是这一过程的关键,这表明KDM5A是NTD的治疗点.
科学领域:
- 发展生物学 发展生物学
- 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:
- 神经管缺陷 (NTDs) 是严重的先天性异常,虽然叶酸可以预防它们,但分子基础仍然难以捉摸.
- 异常的Wnt/β-catenin信号传递有助于NTD,但表观遗传因素的作用尚不清楚.
研究的目的:
- 研究在叶酸缺乏条件下NTD背后的表观遗传机制.
- 探索H3K4me3和KDM5A在NTD中Wnt通路激活中的作用.
主要方法:
- 染色体免疫沉 (ChIP) 和Cut&Tag测定用于分析叶酸缺乏细胞和NTD小鼠模型中的H3K4me3水平.
- 在细胞系,小鼠模型,斑马鱼和人类大脑样本中进行基因表达分析和功能研究.
主要成果:
- 叶酸缺乏在Wnt目标基因促进体上增加了H3K4me3,通过减少KDM5A表达来增强转录.
- 在KDM5A淘汰细胞和缺乏叶酸的NTD小鼠中,Wnt/β-catenin信号和神经发育缺陷被激活.
- 在叶酸缺乏症中,PAX2降低了KDM5A的调节,在人类NTD脑样本中发现了增加的H3K4me3和Wnt目标基因表达.
结论:
- 在低叶酸NTD中,KDM5A依赖的Wnt信号的表观遗传调节至关重要.
- KDM5A代表了预防或治疗神经管缺陷的潜在治疗标.
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