失去Dnah5降低了Dync1h1的表达,导致皮质发育障碍和先天性水脑
Koichiro Sakamoto1, Masakazu Miyajima1,2, Madoka Nakajima1
1Department of Neurosurgery, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421, Japan.
Cells
|November 27, 2024
概括
在Dnah5-knockout小鼠中,dynein缺乏导致先天性水头症,通过损害状功能和皮质发育,导致快速腹腔扩大.
科学领域:
- 神经科学是一个神经科学.
- 发展生物学 发展生物学
- 遗传学 遗传学 是一个
背景情况:
- 主要的状动力障碍与Dnah5.5有关.
- Dnah5-Knockout小鼠表现出急性水头,原因是纤维细胞运动能力受损和脑脊液 (CSF) 停滞.
- 快速腹腔扩大表明,在先天性水头中,CSF停滞之外还有其他因素.
研究的目的:
- 调查导致先天性水头症快速腹腔扩大的原因.
- 确定Dnah5缺乏在脑水性发育神经发育方面的作用.
- 分析受损状功能对大脑发育的影响.
主要方法:
- 使用CRISPR/Cas9.9生成了Dnah5淘汰赛的小鼠.
- 通过微阵列和免疫染来评估dinein,N-cadherin和nestin的表达.
- 量化基因和蛋白质水平使用实时PCR和西式涂抹.
主要成果:
- 所有Dnah5-Knockout小鼠都患有水头发病,手臂上缺少轴膜外侧肌肉.
- 快速腹腔扩大与成熟的运动皮层神经元减少25%相关.
- 观察到Dync1h1表达的降低和细胞质二烯水平的56.3%降低.
- 在侧腔室壁中减少了nestin (31.7%) 和N-cadherin (33.3%).
结论:
- 减少的细胞质二烯会损害神经发生,轴突生长和皮层神经元密度.
- 在Dnah5-Knockout小鼠中,先天性水脑病是由于皮质发育不良和CSF停滞导致的.
- 在这个模型中,细胞质二烯缺乏会加剧水头症的严重程度.
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