在SFTPB的低形态致病变体导致成人肺纤维化
Tifenn Desroziers1, Grégoire Prévot2, Aurore Coulomb3
1Inserm UMR_S933, Laboratory of Childhood Genetic Diseases, Armand Trousseau Hospital, Sorbonne Université, Paris, France.
European journal of human genetics : EJHG
|June 28, 2023
概括
新发现揭示了一种罕见的表面活性蛋白-B (SFTPB) 基因变异,导致成人肺纤维化. 这种低形态变体允许生存到成年,但导致间歇性肺病 (ILD).
科学领域:
- 遗传学 是一个遗传学.
- 肺部病理学 肺部病理学
- 分子生物学分子生物学
背景情况:
- 表面活性蛋白 (SP) -B基因 (SFTPB) 的双性致病变体通常与致命的新生儿间歇性肺病 (ILD) 有关.
- 在罕见的SFTPB相关性ILD的幼儿中,已经注意到异常的生存率.
研究的目的:
- 报告两个相关的成年人肺纤维化由新型同卵性SFTPB致病变体引起.
- 研究这种变体的分子机制及其对SP-B表达和肺病理学的影响.
主要方法:
- 基因测序以确定SFTPB变种.
- 在体外转录研究分析拼接.
- 在肺活检上进行免疫抑制以评估SP-B表达.
主要成果:
- 在两名肺纤维化成年患者中发现了一种新的同卵性SFTPB致病变体c.582G>A p.
- 实验室研究表明,这种同名变体诱导异常拼接,产生异常转录与正常SFTPB转录的一小部分一起.
- 肺活检的免疫阻滞检测显示,受影响患者中SP-B表达几乎完全不存在.
结论:
- 确定的低形态SFTPB拼接变体可能允许在成年后生存,同时导致上皮细胞功能障碍和随后的ILD.
- 在非典型或早期发病的ILD病例中,应考虑SFTPB致病变体,特别是具有家族病史的病例.
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