在DENND5B中出现的de novo变异会导致神经发育障碍
Marcello Scala1, Valeria Tomati2, Matteo Ferla3
1Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genoa, Genoa, Italy; Pediatric Neurology and Muscular Diseases Unit, IRCCS Istituto Giannina Gaslini, Genoa, Italy; UOC Genetica Medica, IRCCS Giannina Gaslini, Genoa, Italy.
American journal of human genetics
|February 22, 2024
概括
在DENND5B中的遗传变异破坏了细胞内运输,导致神经发育障碍与认知障碍,和白质缺陷. 这项研究将DENND5B与关键的细胞贩运通道联系起来.
科学领域:
- 细胞生物学 细胞生物学
- 神经遗传学 神经遗传学
- 分子生物学分子生物学
背景情况:
- 拉布GTPases调节细胞内运输和膜贩运.
- DENND5B是一种关氨酸核酸交换因子 (GEF),在大脑中表达很高.
- 以前,DENND5B在神经发育障碍中的作用尚不清楚.
研究的目的:
- 确定神经发育现象型的遗传原因.
- 研究DENND5B变异对蛋白质功能和细胞过程的功能影响.
- 确定DENND5B功能障碍与神经发育障碍之间的联系.
主要方法:
- 在DENND5B.中识别de novo变异的exome测序.
- 生物化学测定和共聚焦显微镜测定蛋白质水平和定位.
- 光脂质货物的高含量成像,以分析囊泡贩运动态.
- 在模型中预测蛋白质与蛋白质相互作用的影响.
主要成果:
- 在具有神经发育表型的个体中发现了五种新的DENND5B变异.
- 突变DENND5B显示蛋白质水平降低和细胞内囊泡贩运受损.
- 脂质的吸收和分布受到DENND5B变异的显著影响.
- 变种破坏了蛋白质折叠,但没有破坏DENND5B-RAB39A相互作用.
结论:
- DENND5B变种导致复杂的神经发育综合征.
- DENND5B对细胞内膜流通的干扰与这种疾病有关.
- 这些发现强调了DENND5B在大脑发育和功能中的关键作用.
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