在患有银河系血病的患者中,对新型和罕见的DNA变异的分子表征
Vasileios Maroulis1, Andreas Agathangelidis1, Anastasia Skouma2
1Department of Genetics and Biotechnology, Faculty of Biology, School of Physical Sciences, National and Kapodistrian University of Athens, Athens, Greece.
Frontiers in genetics
|December 13, 2023
概括
新生儿查发现了5名婴儿的银河系血病. 使用下一代测序的基因分析揭示了八种罕见的DNA变异,四种新奇的,所有预测是致病的,有助于理解这种罕见的遗传疾病.
科学领域:
- 遗传学和基因组学 遗传学和基因组学
- 代谢障碍 代谢障碍 代谢障碍
- 生物信息学是一种生物信息学.
背景情况:
- 银河糖血症是一种遗传代谢障碍,影响银河糖代谢,通过终身饮食限制来控制.
- 目前的治疗可能无法预防长期并发症,这凸显了需要精确的遗传诊断的必要性.
- 新生儿查计划对于早期发现银河系血症至关重要.
研究的目的:
- 为了对新生儿患者进行基因特征鉴定,鉴定出新生儿患者的银河糖水平升高.
- 识别和分析与银河病相关基因 (GALT,GALK1,GALE) 中的罕见和新型DNA变异.
- 评估针对性下一代测序 (NGS) 对于银河系血病诊断的有用性.
主要方法:
- 通过新生儿查对5例新生儿进行了基因分析,这些新生儿的银河糖水平升高.
- 采用下一代测序 (NGS),针对GALT,GALK1和GALE基因的外显子和拼接区域.
- 利用生物信息学工具进行对蛋白质功能和稳定性的变异性影响的in silico分析.
主要成果:
- 在GALT,GALK1和GALE基因中发现了八种罕见的非同义DNA变异.
- 发现了四种新型变异 (p.Phe245Leu在GALT中,p.Gly193Glu在GALK1,p.Ile266Leu和p.Ala216Thr在GALE中) 以及四种已知的变异.
- 在 silico 分析预测了所有已识别的变体的有害和/或破坏稳定的效果.
结论:
- 鉴于发现的罕见和新型变异,特别是考虑到特定的表型,可能是致病的.
- 有针对性的NGS提供了一种时间和成本效益高的方法来进行银河系血病的遗传调查.
- 这种方法有助于阐明银河系病的复杂遗传基础.
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