与AGAP1相关的内分泌体贩运异常在神经发育障碍中将基因与环境的相互作用联系起来
Sara A Lewis1,2, Somayeh Bakhtiari1,2, Jacob Forstrom1,2
1Pediatric Movement Disorders Program, Barrow Neurological Institute, Phoenix Children's Hospital, Phoenix, AZ 85016, USA.
Disease models & mechanisms
|July 20, 2023
概括
在AGAP1基因变异损害内分泌体贩运,导致神经发育障碍,如自闭症和智力障碍. 这些损伤增加了细胞对环境压力因素的敏感性.
科学领域:
- 遗传学 遗传学是一种遗传学.
- 神经科学是一个神经科学.
- 细胞生物学 细胞生物学
背景情况:
- AGAP1基因编码了一种Arf1 GTPase激活蛋白,该蛋白对内分泌体贩运至关重要.
- 在AGAP1中有害的变异与神经发育状况有关,包括脑和自闭症谱系障碍.
- 介绍了AGAP1中微删除变异的三个新病例,突出了相关的神经发育表型.
研究的目的:
- 调查AGAP1变异介导的神经发育障碍背后的机制.
- 探索基因与环境相互作用在AGAP1相关疾病中的作用.
- 建立一个与AGAP1缺乏相关的细胞功能障碍模型.
主要方法:
- 关于AGAP1微切除个体的临床病例报告.
- 使用Drosophila的正统基因CenG1a来建模AGAP1的功能和功能障碍.
- 评估神经元形态,内分泌体贩运,自和突变的综合应激反应途径.
- 通过暴露于细胞毒性压力因素来评估基因与环境的相互作用.
主要成果:
- 受影响的个体呈现智力障碍,自闭症, dystonia,大脑成熟异常,生长障碍和面部形.
- 果虫模型显示了轴突终端尺寸的减少,神经元内的丰富性增加和自的升高.
- 缺少AGAP1导致综合应激反应 (eIF2α酸化) 慢性激活,并对进一步的侮辱造成应激反应受损.
- 突变在暴露于环境压力因素时表现出增加的致命性,这表明性受损.
结论:
- 破坏AGAP1会损害内溶体贩运,导致慢性综合应激反应的激活.
- 缺少AGAP1使细胞易受二次环境攻击,从而导致神经发育障碍.
- 基因与环境相互作用的拟议模型可能与其他涉及综合遗传和环境因素的神经发育障碍相关.
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