儿科患者ADNP变异的临床影响和体外表征
Chuanhui Ge1, Yuxin Tian2, Chunchun Hu2
1Institutes of Brain Science, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University, Shanghai, 200032, China.
Molecular autism
|January 23, 2024
概括
由ADNP基因变异引起的Helsmoortel-Van der Aa综合征 (HVDAS) 在中国儿科患者中呈现出各种发育和智力障碍. 实验室研究表明,ADNP变种破坏了正常的蛋白质定位和核体形成.
科学领域:
- 遗传学 遗传学 是一个
- 神经科学是一个神经科学.
- 发展生物学 发展生物学
背景情况:
- 赫尔斯莫尔特尔-范德尔阿综合征 (HVDAS),也称为ADNP综合征,是一种罕见的遗传疾病,与活动依赖的神经保护器家庭盒 (ADNP) 基因有关.
- ADNP基因编码了一种对大脑发育至关重要的多任务蛋白质,其变体是自闭症谱系障碍 (ASD) 和智力障碍的常见原因.
研究的目的:
- 描述ADNP变异的中国儿科患者的临床表型.
- 研究已识别的ADNP变体对蛋白质表达和局部化的体外影响.
主要方法:
- 组建了一个由15名中国儿科患者组成的ADNP变体队列.
- 进行了遗传变异鉴定,临床表型评估,西部涂抹和免疫光分析.
- 使用HEK293T和SH-SY5Y细胞系进行ADNP变异体内研究.
主要成果:
- 在15名患者中确定了ADNP基因的13种变异,揭示了包括全球发育迟缓,智力障碍,自闭症和面部异常在内的各种症状.
- 实验室研究表明,虽然野生类型的ADNP和大多数突变物定位在核中,但一些变体破坏了核体的形成.
- 影响核定位信号 (NLS) 的两个变体改变了ADNP定位,导致SH-SY5Y细胞中主要的细胞质表达.
结论:
- 这项研究报告了中国人口中第一个HVDAS患者队列,提供了系统的临床和实验室发现.
- 多种遗传变异被鉴定并在体外验证,为HVDAS的遗传基础提供了洞察力.
- 这些发现突出了ADNP变异对蛋白质功能和局部化的不同临床表现和影响.
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