在保加利亚宗教少数群体中呈现为震-发声障碍综合征的变异性 - 长视障碍
Teodora Chamova1, Tihomir Todorov2, Paulius Palaima3,4
1Department of Neurology, University Hospital "Alexandrovska", Medical University, 1431 Sofia, Bulgaria.
Genes
|June 26, 2025
概括
动脉缩症 (A-T) 可以表现为没有小脑征兆的 dystonia,具有挑战性的诊断. 这项研究确定了保加利亚家庭的新型ATM基因突变,扩大了对ATT的理解.
科学领域:
- 遗传学 是一个遗传学.
- 神经学 神经学
- 罕见疾病 罕见疾病
背景情况:
- ATAXIA-TELANGECTASIA (A-T) 是一种罕见的自体倒退性疾病,由ATM基因突变引起.
- A-T的临床表现因残留的ATM激酶活性和突变类型而异,从严重形式到非典型形式不等.
- 了解这种频谱对于准确的诊断和管理至关重要.
研究的目的:
- 调查保加利亚血统中运动障碍的遗传基础.
- 为了识别与特定的 dystonia 和 tremor 表型相关的 ATM 基因突变.
- 为了扩大对阿塔克西亚-泰朗吉阿克塔西亚的临床变异性的理解.
主要方法:
- 在两个不相关的血统中的受影响个体上进行了全外体测序.
- 桑格测序用于确认ATM基因的突变,包括编码序列和外子-内子边界.
- 分析了来自四个血统的28名患者的临床数据.
主要成果:
- 24名患者在ATMc.8147T>C (p.Val2716Ala) 突变中具有同胞性.
- 四名患者是复合异合体,发现了包括拼接位变异 (c.4909+1G>A) 和同名致病变异 (c.3576G>A,p.Lys1192) 在内的二次突变.
- 症状包括 dystonia,震,肌痛性关节障碍,和消化障碍,在大多数情况下,慢慢进展的过程和正常的大脑成像.
结论:
- ATM基因突变可能导致广泛的临床特征,包括没有明显大脑小脑参与的早期发作的 dystonia.
- 正常的大脑成像并不排除A-T.
- 在患有不明原因的运动障碍,即使是轻微的运动障碍,以及阿尔法-胎蛋白水平升高的患者中,应该考虑A-T.
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