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与ODAD4相关的原发性乳动力障碍症:在北克报告了五例病例和一个创始变异

Marie-Hélène Bourassa¹, Guillaume Sillon^2,3, Shuizi Ding⁴

¹Department of Pediatrics, McGill University, Montreal, QC H4A 3J1, Canada.

|September 26, 2025

概括

在ODAD4的致病变体导致初级状动力障碍 (PCD). 法裔加拿大人的新型ODAD4变体呈现出较轻微的PCD表型,为疾病变异性提供了洞察力.

科学领域:

遗传学是一个遗传学.
呼吸系统医学呼吸系统医学
细胞生物学细胞生物学

背景情况:

初级状动力障碍 (PCD) 是一种罕见的遗传疾病,影响功能.
在ODAD4的致病变体是PCD的极为罕见的原因,通常与严重的耳鼻肺部疾病和支气管切除有关.

研究的目的:

报告5名PCD患者携带双基ODAD4变体.
为了研究在法裔加拿大人群中发现的一种新型同卵性ODAD4基因型 (c.245delA).
描述与这种特定的ODAD4变异相关的临床表型和潜在的分子机制.

主要方法:

对所有参与者进行了标准化的PCD诊断评估.
基因分析确定了双 ODAD4 变体,包括一种新型同卵性基因型.
功能性研究包括用于拼接分析的逆转录聚合酶链反应 (RT-PCR),用于蛋白质表达的西斑,以及评估状功能和粘膜清除.

主要成果:

确定了5名患有PCD和双性ODAD4变异的个体 (平均年龄为14岁).
三个人共享了一种新的同卵性ODAD4基因型 (c.245delA),这表明法裔加拿大人的创始人效应.
尽管有纤毛功能障碍的证据 (静态的纤毛,缺少ODAD4蛋白,粘膜纤毛清除受损),但参与者表现出较温和的肺表型,肺功能正常,有些人没有支气管切除.
这种c.245delA变异导致异常拼接,产生轻微缩短的mRNA,但导致临床表现不如以前报告的ODAD4变异严重.

结论:

新型同卵性ODAD4 c.245delA变种与较轻的初级状动力障碍症有关,特别是在法裔加拿大人群中.
分子机制涉及异常拼接,但导致表型不如经典PCD严重.
进一步对这种变体进行查可能会揭示更多病例,并提高对PCD变异性的理解.

关键词:

在ODAD4中使用ODAD4.北克北克北克北克创始人的变体轻度的表型轻度的表型主要的状动力障碍症.

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