米托素2变体呈现出脑小脑亚型多系统缩的表型
Adrienne Elbert1, Katherine Dixon1, Yaoqing Shen1
1From the Department of Medical Genetics (A.E., K.D., C.F.B., S.J.J.), University of British Columbia; Provincial Medical Genetics Program (A.E., S.H., C.B.), B.C. Women's Hospital and Health Centre; Canada's Michael Smith Genome Sciences Centre (K.D., Y.S., S.J.J.), BC Cancer; Fraser Health Movement Disorders Clinic (A.K.K.), Jim Pattison Outpatient Care and Surgery Centre, Surrey; and Department of Medicine (A.K.K.), Division of Neurology, University of British Columbia, Vancouver, Canada.
在MFN2的一个遗传变异导致渐进的小脑缩和小脑缩,模仿多系统缩,小脑类型 (MSA-C) 在这个病人.
科学领域:
- 神经遗传学 神经遗传学
- 神经学 神经学
- 分子医学是分子医学.
背景情况:
- 脑小动症是一种具有不同病因的衰弱性神经系统疾病.
- 米托素2 (MFN2) 基因的突变通常与遗传性感觉和运动神经病变VI和夏科特玛丽牙病2A有关.
- 多重系统性缩,大脑类型 (MSA-C) 呈现出渐进的动脉缩和特征的神经成像发现.
研究的目的:
- 在成年男性患者中调查快速进展的小脑动症的遗传基础.
- 确定MFN2变异是否可以表现为模仿MSA-C的小脑动症.
主要方法:
- 进行了标准的神经学评估和全面的基因组测序.
- 使用脑成像 (MRI) 来评估小脑和脑干的结构变化.
- 基因分析确定了MFN2基因中可能存在的致病变体.
主要成果:
- 患者呈现出渐进的小脑缩症,认知功能障碍,关节障碍和轻微的外围神经病变.
- 脑部成像显示小脑缩和橄球小脑结症,与T2高强度在pons.
- 在MFN2的GTPase域中确定了一个可能的致病变体 (c.[838C>T];[=],p.(R280C)).
结论:
- 在MFN2中有害的变体可以导致神经现象的频谱,包括小脑动症.
- 与MFN2相关的大脑动症可以呈现大脑形缩并模仿MSA-C,即使是最小的外围神经病变.
- 这种情况扩大了已知的MFN2相关疾病的表型谱.
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