由于TPP1中发现的一种新型同卵性深内联结合变异导致的CLN2疾病,使用长读序列测序来发现
Connolly Steigerwald1, Jill Borsuk2, John Pappas2
1Division of Neurogenetics, Department of Neurology, NYU Grossman School of Medicine, New York, NY 10016, USA.
Molecular genetics and metabolism
|November 3, 2023
概括
在缺乏典型TPP1变异的兄弟姐妹中,神经状脂症2型 (CLN2) 疾病诊断具有挑战性. 长读测序揭示了一个深度内基变异,突出了精确基因诊断的先进技术.
科学领域:
- 遗传学 遗传学 是一个
- 神经退行性疾病 神经退行性疾病
- 分子生物学分子生物学
背景情况:
- 神经神经状脂症类型2 (CLN2) 是一种严重的遗传性神经退行性疾病.
- 酶替代疗法可用于CLN2疾病,这强调了需要准确诊断的必要性.
研究的目的:
- 在临床诊断但负面标准遗传检测的兄弟姐妹中调查CLN2疾病的遗传基础.
- 为了证明先进的测序技术在诊断罕见遗传疾病中的实用性.
主要方法:
- 临床诊断CLN2疾病的临床诊断.
- 对TPP1变异进行标准基因检测.
- 长读测序以识别新型变体.
- 临床DNA和RNA测序以确认变体的致病性和拼接效应.
主要成果:
- 标准基因检测没有在兄弟姐妹中发现致病TPP1变异.
- 长读序列测定确定了一个同卵性深内基变体.
- 预计鉴定出的变种会影响RNA拼接.
- 临床DNA和RNA测序证实了拼接缺陷.
结论:
- 深层内在变异可以导致CLN2疾病,并且可能会被标准遗传测试遗漏.
- 长读数测序是诊断复杂遗传疾病的宝贵工具.
- 将先进的分子技术与传统测试相结合,可以提高神经退行性疾病的诊断准确度.
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