在异质毒性加上小鼠模型家族中的新的主导-负FOXJ1突变
Lulu Li1, Guocheng Shi2, Xingyu Zhang1
1Pediatric Translational Medicine Institute, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
Translational pediatrics
|September 11, 2023
概括
一种新的FOXJ1突变通过破坏乳毛功能,导致逆位和呼吸系统问题. 在小鼠中,这种主导负面效应导致比以前观察到的更严重的表型,影响毛和潜在的心脏发育.
科学领域:
- 遗传学 是一个遗传学.
- 发展生物学 发展生物学
- 分子生物学分子生物学
背景情况:
- 初级状动力障碍 (PCD) 是一种影响动的遗传疾病,导致各种健康问题,包括呼吸问题和逆位.
- 叉头盒J1 (FOXJ1) 中自体主导功能丧失突变与一种特定类型的PCD (CILD43) 有关.
- 在人类和小鼠模型中对FOXJ1突变的功能验证对于了解疾病机制至关重要.
研究的目的:
- 在一家三代人中调查异质毒性和先天性心脏病的遗传原因.
- 确定新型FOXJ1突变的功能影响,包括其主导负效应.
- 开发和描述一只小鼠模型,以研究已识别的FOXJ1突变的体内后果.
主要方法:
- 整体外基因组测序以确定家族中的致病变体.
- 同源重组产生基因敲进小鼠与人类相当的FOXJ1突变.
- 显微镜和转录组测序以分析小鼠模型中的状结构,表型和心脏基因表达.
主要成果:
- 鉴定了一种新型异构性FOXJ1删除变体 (c.1129delC),在体外表现出主导负效应 (DNE).
- 同性合和异性合的Foxj1突变小鼠表现出逆位,水头和受损的气管,表明比以前报告的更严重的表型.
- 与心肌病相关基因的差异表达在同卵性突变小鼠心脏中被观察到,这表明心脏病理学中的作用.
结论:
- 在FOXJ1中c.1129delC突变是研究家族中 situs inversus的可能原因.
- 这种FOXJ1突变显示出主导负效应,导致比完全的等位基删除更严重的后果.
- 这些发现突出了FOXJ1在毛功能和发育中的关键作用,这对先天性心脏病有影响.
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