两种新型NKX2-1位变异的功能特征,这些变异会导致肺表面活性剂功能障碍
Huixian Wang1, Gaoli Jiang1, Dan Dai1
1Division of Pulmonary Medicine, Children's Hospital of Fudan University, Shanghai, China.
Pediatric research
|November 7, 2023
概括
在患有肺表面活性剂功能障碍的儿童中发现了两种新的NKX2-1位变异. 试验室研究揭示了不同的致病机制,部分解释了这些罕见遗传疾病的表型差异.
科学领域:
- 遗传学和分子生物学
- 儿科呼吸系统医学 儿科呼吸系统医学
背景情况:
- 肺表面活性剂功能障碍 (PSD) 是一种罕见的,异质的遗传疾病,影响儿童的生活质量.
- NKX2-1基因变异与各种呼吸系统和神经系统疾病有关.
研究的目的:
- 在与PSD无关的儿科患者中报告两种新的NKX2-1位变异.
- 研究这些新型变异对NKX2-1基因表达和功能的体外功能影响.
主要方法:
- 招募了患有PSD和确定NKX2-1变异的儿科患者.
- 构造的野生类型和NKX2-1变体等离子体用于细胞转化.
- 使用qRT-PCR,西部斑,免疫光,EMSA和双露西法酶记者分析评估的变异效应.
主要成果:
- 确定了两种新型异构体NKX2-1位变异:c.705delC (Gly236Alafs*29) 和c.313_316 dup (Asn106Lysfs*304). 这两种新型异构体NKX2-1位变异是:c.705delC (Gly236Alafs*29) 和c.313_316 dup (Asn106Lysfs*304).
- 观察到Asn106Lysfs*304的减弱的mRNA和蛋白质表达;这两种变异都显示了DNA结合和转录活动的减少.
- Asn106Lysfs*304失去了与PAX8和TAZ的协同相互作用,而Gly236Alafs*29保留了部分相互作用和转录活性.
结论:
- 在患有PSD的儿童中报告了两种新的NKX2-1移变异,扩大了已知的基因型-表型谱.
- 证明了两种变体在体外不同的致病机制,有助于理解NKX2-1相关疾病中的表型异质性.
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