长读测序解决了帕金森病中PRKN的复杂结构变异
Kensuke Daida1,2,3, Manabu Funayama3,4, Kimberley J Billingsley5
1Integrative Neurogenomics Unit, Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA.
medRxiv : the preprint server for health sciences
|October 4, 2023
概括
帕金森病 (PD) 通常是由PRKN突变引起的. 这项研究使用长读序列识别在PRKN中发现了大约7Mb的反转,揭示了年轻发病PD的新病因.
科学领域:
- 基因组学就是基因组学.
- 人类遗传学 人类遗传学
- 分子生物学分子生物学
背景情况:
- 帕金森病 (PD) 经常与*PRKN*基因的突变有关,特别是在年轻发病和自体衰退形式中.
- *PRKN*基因位于FRA6E内部,这是一个常见的脆弱部位,使其易受结构变异的影响.
- 复杂的结构变异,如PRKN*内的反转,很少被报告,这表明潜在的未表征的致病机制.
研究的目的:
- 通过使用先进的长读测序技术,在PRKN基因中识别复杂的结构变异,特别是逆转.
- 在单胞双胞胎中调查年轻发作的 dystonia-parkinsonism 的遗传基础.
主要方法:
- 利用向测序,全外体测序,多重结探头放大 (MLPA) 和长读测序的组合来分析患者样本.
- 通过分析来自大型队列 (英国生物银行和AMP-PD) 的全基因组测序数据,评估了包含*PRKN*的复杂逆转的流行率和特征.
主要成果:
- MLPA检测到 *PRKN* 中的异构体3外因子删除,而长读序列检测显示了一种新的7Mb的反转,影响了 *PRKN* 编码序列的很大一部分.
- 对受影响的受试者来说,已经确立了复合异构 *PRKN* 载体的诊断.
- 对大型数据集的分析确定了英国生物库中的9个潜在的有害反转和AMP-PD队列中的2个潜在的有害反转,可能影响*PRKN*异型.
结论:
- 这项研究报告了第一个大型的7Mb逆转,其断点位于*PRKN*基因之外.
- 强调了长期阅读的全基因组测序在发现复杂的结构变异中发挥的关键作用,用于诊断年轻发病的帕金森病未解决病例.
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