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在PRRT2相关疾病中,PRRT2结合变体的功能性表征和致病性分类

Jiao-Jiao Xu¹, Yu-Lan Chen¹, Wan-Bing Sun¹

¹Department of Medical Genetics and Center for Rare Diseases, Second Affiliated Hospital, Zhejiang University School of Medicine, and Zhejiang Key Laboratory of Rare Diseases for Precision Medicine and Clinical Translation, Hangzhou, Zhejiang, China.

Annals of clinical and translational neurology

|September 16, 2025

概括

这项研究阐明了PRRT2基因变异在 Paroxysmal kinesigenic dyskinesia (PKD) 中的致病性. 结合计算和功能分析证实了疑似PKD患者的诊断.

科学领域:

遗传学遗传学是一个
神经学神经学
分子生物学分子生物学

背景情况:

松性中国性运动障碍 (PKD) 是一种常见的遗传性运动障碍.
PRRT2基因是PKD的主要遗传原因.
调查PRRT2拼接区域变异对于理解PKD病变的产生至关重要.

研究的目的:

为了确定PRRT2变异在拼接区域的致病性.
为了增强帕洛克西斯马尔kinesigenic dyskinesia的遗传诊断.
评估 in silico 和功能测试在变种分类中的作用.

主要方法:

针对PRRT2基因的下一代测序.
从患者队列和HGMD中获得拼接区域变异的in silico分析.
使用HEK293T细胞中的小基因系统进行功能测试,以评估拼接异常.

主要成果:

分析了14种PRRT2变体,包括内基,同义,删除和误解类型.
在 silico 预测表明大多数变体的潜在拼接中断.
功能性测试证实了11种变体的异常拼接 (外显子跳转,内显子保留),使得以前不确定的5种PRRT2变体的重新分类成为可能.

结论:

对于准确评估PRRT2拼接变体的致病性,在基分析和功能测定的结合方法至关重要.
这种方法改善了对神经发作性 kinesigenic dyskinesia 和相关疾病的遗传诊断.
准确的变异分类有助于确认疑似PRRT2相关疾病的患者的诊断.

关键词:

PRRT2 是一个 PRRT2 的类型.功能性表征的功能性表征.病原性分类的病原性分类.拼接的变种拼接的变种

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