台湾ALS患者的SOD1突变:临床特征,频率和p.T138R创始效应
Kang-Yang Jih1,2,3,4, Yu-Sheun Tsai5, Shih-Yu Fang1,2
1Department of Neurology, Taipei Veterans General Hospital, Taipei, Taiwan.
Amyotrophic lateral sclerosis & frontotemporal degeneration
|December 22, 2025
概括
SOD1基因的突变导致肌缩侧面硬化症 (ALS),并与早期发病有关. 在台湾的ALS患者中发现了一种创始变异p.T138R,这突显了基因查的必要性.
科学领域:
- 遗传学 是一个遗传学.
- 神经科学是一个神经科学.
- 生物化学 生物化学
背景情况:
- 超氧化脱酶1 (SOD1) 基因的突变是已知的肌缩侧面硬化症 (ALS) 的遗传原因.
- 这些突变导致有毒的功能增益效应,促进中枢神经系统中的蛋白质错折和聚合.
- 新兴的SOD1向疗法需要精确的基因诊断来确定患者的资格.
研究的目的:
- 调查台湾ALS队列中SOD1突变的频率和临床特征.
- 在这个群体中识别与SOD1突变相关的潜在创始效应.
- 评估已识别的SOD1变异的体外聚合倾向.
主要方法:
- 在650名台湾ALS患者中,对SOD1基因的所有编码前基因进行桑格测序.
- 使用单核酸多态性标记器对 SOD1 进行的哈普洛型分析,以评估创始人效应.
- 蛋白质交叉链测试以确定11种SOD1变体的聚合趋势.
主要成果:
- 在26名试验者和12名亲属中发现了17种致病性SOD1变异.
- 最常见的变体是p.T138R (8个探针) 和p.G11A (3个探针).
- 在p.T138R载体中确定了一个共享的祖先哈普洛型,这表明了一个创始人效应. 所有测试的突变SOD1蛋白质都在体外显示了寡合体的形成.
结论:
- 在台湾,SOD1突变约占ALS病例的4%,经常出现早期和脊柱发病的疾病.
- 这种p.T138R变异是台湾人口中的创始基因突变.
- 对SOD1突变的基因查对于准确的ALS诊断和指导针对性治疗的资格至关重要.
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