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最常见的NOTCH3突变导致CADASIL或CADASIL类脑小血管疾病:系统性审查

Georgina Boston¹, Dan Jobson¹, Toshiki Mizuno²

¹Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, UK.

Cerebral circulation - cognition and behavior

|July 5, 2024

概括

这项研究确定了在大脑自体主导动脉病变与皮下心脏病发作和白细胞脑病变 (CADASIL) 中常见的NOTCH3突变. 某些基因型与白质超强度和疾病严重程度相关,尽管整体表型显示了相似之处.

科学领域:

遗传学和神经学遗传学和神经学
分子医学是分子医学.
神经成像是一种神经成像.

背景情况:

大脑自体主导性动脉病变与皮下心脏病发作和白细胞脑病变 (CADASIL) 是一种影响小脑动脉的遗传性疾病.
它是由NOTCH3基因的突变引起的,导致神经系统逐渐衰退.
了解基因型-表型相关性对于预测疾病进展和管理至关重要.

研究的目的:

在全球范围内确定与CADASIL相关的最常见的NOTCH3突变.
研究特定的NOTCH3基因型与临床表型之间的关联,特别是MRI上的白质超强度.
为了比较不同常见NOTCH3突变的疾病严重程度和发病年龄.

主要方法:

临床研究和基因组数据库的系统文献综述 (1996-2023年).
在CADASIL患者中识别常见的NOTCH3误解突变.
对临床记录的分析,重点是MRI发现 (白质超强度) 和疾病特征,以检测基因型-表型相关性.

主要成果:

最常见的六个NOTCH3突变是p.R75P,p.R133C,p.R141C,p.R169C,p.R182C和p.R544C,其中p.R133C是最常见的.
基因型p.R75P,p.R141C,p.R182C和p.R544C在MRI上显示出与白质超强度的强烈关联.
与p.R544C相比,p.R141C突变与疾病严重程度的增加和早期发病有关,尽管这两者之间的整体表型差异在统计学上并不显著.

结论:

特定的NOTCH3突变与关键的CADASIL表型密切相关,特别是MRI上可见的白质变化.
虽然像p.R141C这样的某些突变可能表明疾病严重程度更高,但像p.R141C和p.R544C这样的常见突变的表型谱在很大程度上重叠.
突变的地理分布表明中国和日本等地区的潜在创始人效应或采样偏差.

关键词:

卡达西尔 (CADASIL) 是一种痴呆症是一种痴呆症.突变突变是一种突变.在NOTCH3中,现象型现象型是一种表现型.

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