影响Kir4.1通道的异合体KCNJ10变体 引起 Paroxysmal Kinesigenic Dyskinesia 的原因
Xiaojun Huang1,2, Xin Fu3, Jingying Wu1,2
1Department of Neurology, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.
在 Paroxysmal kinesigenic dyskinesia (PKD) 患者中发现了 KCNJ10 的遗传变异. 内向整形通道4.1 (Kir4.1) 功能受损可能导致神经元异常刺激,导致PKD.
科学领域:
- 神经遗传学 神经遗传学
- 道病变是一种通道病变.
- 运动障碍 运动障碍
背景情况:
- 超过60%的阳性阴性运动障碍症 (PKD) 病例的遗传原因不明.
- 识别新的遗传贡献者对于理解PKD病变的产生至关重要.
研究的目的:
- 为了阐明新型遗传对帕洛克斯性中国性动力障碍症 (PKD) 的贡献.
- 调查已识别的基因变异对神经元刺激性的功能影响.
主要方法:
- 476个具有不确定的PKD遗传原因的探针的全外体序列测序.
- 病例控制分析以确定候选基因,随后进行全细胞补丁记录.
- 为体内功能研究开发Kcnj10异合体淘汰赛小鼠模型.
主要成果:
- 在3.07%的PKD试验者中检测到异构性KCNJ10变异,通常与比PRRT2变异更温和的表型有关.
- KCNJ10变体改变了Kir4.1通道功能,减少了细胞电流,并导致了淘汰小鼠的神经刺激性升高.
- 淘汰赛中的Kcnj10小鼠表现出 dystonic 姿势,运动协调障碍和运动学习缺陷.
结论:
- 异构体的KCNJ10变体与 Paroxysmal kinesigenic dyskinesia (PKD) 有关. 这种变异可能是由于KCNJ10的异构体变异.
- 损坏的Kir4.1通道功能有助于异常的神经元刺激性和PKD病原体.
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