作为家族性肺动脉高血压的新型基因,SMAD5
Ding Cao1,2, Ekkehard Grünig1, Yuriy Sirenko3
1Center for Pulmonary Hypertension, Thoraxklinik Heidelberg gGmbH at Heidelberg University Hospital, Translational Lung Research Center Heidelberg (TLRC), German Center for Lung Research (DZL), Heidelberg, Germany.
Clinical science (London, England : 1979)
|December 4, 2024
概括
基因测试在肺动脉高血压 (PAH) 患者中发现了两个SMAD5基因变异. 这些变异影响细胞活力和增殖,这表明SMAD5是PAH诊断的潜在新基因.
科学领域:
- 遗传学 是一个遗传学.
- 心血管医学 心血管医学
- 分子生物学分子生物学
背景情况:
- 肺动脉高血压 (PAH) 是一种严重的疾病,具有显著的遗传成分.
- 基因诊断测试对于了解PAH遗传性和识别风险家庭至关重要.
- 已知的PAH基因仅解释了遗传病例的一小部分,因此需要寻找新的遗传因素.
研究的目的:
- 通过基因测序识别与肺动脉高血压 (PAH) 相关的新型基因.
- 在肺动脉光滑肌细胞 (PASMCs) 中功能性表征已识别的SMAD5变异.
- 评估SMAD5新型变异的致病性,以便在基因诊断测试中潜在纳入.
主要方法:
- 在325名PAH患者中对18个已知的PAH基因进行遗传测序.
- 在剩余患者中测序额外的候选基因,包括SMAD5.
- 在PASMC中使用SMAD5变异的体外功能测试 (细胞活力,增殖,细胞亡).
主要成果:
- 在23%的患者中发现已知PAH基因的突变.
- 确定了两个SMAD5误解变异,在对照中缺席,并预测具有病原性.
- 一种变异 (p.(Leu392Pro)) 增加了PASMC的增殖和生存能力;另一种 (p.(Trp93Arg)) 增加了细胞亡和降低了生存能力.
结论:
- 已识别的SMAD5变异可能是致病性,并与PAH相关.
- SMAD5代表了一个潜在的新基因,用于肺动脉高血压的遗传诊断测试.
- 这些发现扩大了PAH的遗传情景,并为未来的诊断策略提供了信息.
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