在未解决的PRKN相关帕金森病的病例中,复合异构的结构变异
Agata Fant1, Sara Trova1, Edoardo Monfrini2,3
1Non-Coding RNAs and RNA-Based Therapeutics, Italian Institute of Technology (IIT), CMP3VdA, Aosta, Italy.
概括
罕见的PRKN基因结构变异导致早期发病的帕金森病 (EOPD). 全基因组测序 (WGS) 确定了标准测试中错过的复杂,重叠的删除和重复,改善了EOPD的遗传诊断.
科学领域:
- 遗传学
- 神经科学
- 分子生物学
背景情况:
- 在PRKN基因的双基因突变是早期发病的帕金森病 (EOPD) 的常见原因.
- 结构变异与单核酸变异一起,对PRKN突变格局做出了重大贡献.
- 很大一部分EOPD病例仍未通过目前的方法进行基因诊断.
研究的目的:
- 在EOPD患者中确定PRKN位点的复杂基因变异.
- 通过临床外体测序 (CES) 和多重结合依赖的探针放大 (MLPA) 调查孟德尔 PD 基因负的病例.
- 使用短读全基因组测序 (sr-WGS) 发现难以捉摸的遗传变异.
主要方法:
- 通过使用sr- WGS的标准基因测试,评估了498名无关EOPD患者的突变.
- 使用长读全基因组测序 (lr-WGS) 进行深入分析和复杂变异的验证.
- 查询了帕金森氏症进展标志物倡议 (PPMI) 数据集以评估变种流行率.
主要成果:
- 在三例EOPD病例中,sr-WGS发现了PRKN基因的复合异构结构变异 (重叠的删除/重复).
- 在家族病例中,这些双基PRKN结构变异与疾病共分离.
- lr-WGS精确地解决了变体结构;在PPMI数据库中没有发现类似的变体,表明稀有性.
结论:
- 描述了PRKN位点的复合异构结构变异的罕见配置.
- 这些复杂的变种很难用标准的基因诊断技术来检测.
- 强调将全基因组测序 (WGS) 纳入EOPD临床诊断的重要性.
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