NUS1变种导致伦诺克斯-加斯托综合征与未折叠蛋白反应激活相关
Nan-Xiang Shen1, Xiao-Chong Qu1, Jing Yu2
1Department of Neurology, Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, 510260, China.
Molecular neurobiology
|March 23, 2024
概括
在NUS1基因的新变异导致Lennox-Gastaut综合征 (LGS),一种严重的发育性和性脑病变 (DEE). 这项研究将NUS1变异与未折叠蛋白反应 (UPR) 途径激活和细胞死亡联系起来.
科学领域:
- 遗传学 遗传学 是一个
- 神经科学是一个神经科学.
- 细胞生物学 细胞生物学
背景情况:
- 发育性和性脑病变 (DEE) 是一种严重的早期发作的神经系统疾病.
- 伦诺克斯-加斯托综合征 (LGS) 是一种致残的DEE,治疗选择有限.
- 在此之前,NUS1变异在LGS病变发生中的作用是未知的.
研究的目的:
- 通过检查NUS1变异来调查LGS的遗传基础.
- 阐明已识别的NUS1变种的功能后果.
- 探索未折叠蛋白质响应 (UPR) 信号在LGS中的作用.
主要方法:
- 在165名LGS患者的三基全外因组测序.
- 在变种病原性 (R290C) 的in silico预测.
- 在体外研究中使用HEK293T细胞进行NUS1敲击和野生类型/突变NUS1表达.
- 在体内研究使用Drosophila模型 (Tango14敲击和敲进).
主要成果:
- 在LGS患者中发现了两个新的NUS1变体 (c.868C>T/p.R290C和c.792-2A>G).
- 在人口数据库中没有NUS1变种,预计会造成损害.
- 在HEK293T细胞中,NUS1 knockdown诱导的UPR激活和亡,由野生型NUS1.1拯救.
- 果虫模型表现出类似发作的行为,神经元过度刺激,发育异常和UPR激活.
结论:
- NUS1是LGS的致病基因,具有主导性遗传.
- 病原性与UPR信号激活有关.
- UPR通路的激活可能是DEE中常见的致病机制.
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