在普拉德-威利综合征中早期突触形成和神经元功能的缺陷
Shuhei Soeda1, Daiki Ito2, Tomoe Ogushi2
1Laboratory of Neurochemistry, College of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Noji Higashi, Kusatsu, Shiga, 525-8577, Japan. soeda05@fc.ritsumei.ac.jp.
Scientific reports
|July 25, 2023
概括
普拉德-威利综合征 (PWS) 神经元显示突触形成受损,神经元刺激性降低. 这些发现表明PWS中可能存在神经发育缺陷,与下调的SLITRK1.1有关.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
- 发展生物学 发展生物学
背景情况:
- 普拉德-威利综合征 (PWS) 是一种表观遗传疾病,与15q11-q13染色体基因缺陷有关.
- PWS与神经发育和精神疾病有关,包括自闭症谱系障碍.
- 以前的研究表明,PWS患者衍生的诱导多能干细胞 (iPSCs) 中存在异常分化和转录基因失调.
研究的目的:
- 为了研究PWS患者iPSCs衍生的神经元中的突触形成和功能.
- 为了确定有助于PWS中神经元功能障碍的特定分子缺陷.
主要方法:
- RNA测序以识别PWS神经干细胞 (NSC) 中的下调基因.
- 从PWS患者的iPSC和单基因缺陷突变细胞分化为神经元.
- 对前和后突触标记物 (例如PSD-95) 和神经元形态的分析.
- 通过膜潜能对K+刺激的反应来测量神经元刺激性.
主要成果:
- 在PWS NSC中,SLITRK1被确定为一个下调的基因.
- 从PWS和突变iPSC衍生的神经元与对照人群相比,表现出明显较低的前和后突触标志物水平.
- 在PWS神经元中,PSD-95点数沿神经元减少.
- 在PWS和突变神经元中,神经元刺激性显著降低.
结论:
- 降低SLITRK1的调节和突触发育障碍有助于PWS中神经元功能障碍.
- 这些PWS神经元中的突触和功能缺陷可能是该综合征中观察到的神经发育现象的基础.
- 来自iPSC的神经元为研究PWS神经生物学提供了有价值的模型.
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