线粒体伴侣TRAP1的突变导致自闭症,男性的症状更严重
Małgorzata Rydzanicz1, Bozena Kuzniewska2,3, Marta Magnowska2,3
1Department of Medical Genetics, Medical University of Warsaw, Warsaw, Poland.
EMBO molecular medicine
|September 27, 2024
概括
对于线粒体功能至关重要的TRAP1基因的突变与自闭症谱系障碍 (ASD) 有关. 这一发现为ASD和线粒体蛋白质平衡的遗传原因提供了新的见解.
科学领域:
- 遗传学 是一个遗传学.
- 神经科学是一个神经科学.
- 线粒体生物学 线粒体生物学
背景情况:
- 线粒体功能障碍越来越多地与自闭症谱系障碍 (ASD) 有关.
- 线粒体问题与ASD之间的确切因果关系尚不清楚.
- TRAP1,一个线粒体监护人,是HSP90家族的一部分.
研究的目的:
- 研究TRAP1基因突变在自闭症谱系障碍中的作用.
- 识别与ASD和线粒体功能障碍相关的遗传变异.
- 在模型系统中探索TRAP1突变的功能后果.
主要方法:
- 在一个自闭症患者的TRAP1基因中发现了一个后异位的马赛克突变.
- 选了176个与ASD无关的试验者,以检测TRAP1变种.
- 生成并分析敲入Trap1 p.Q641*小鼠以研究与ASD相关的行为和线粒体功能.
主要成果:
- 在TRAP1基因中发现了一个后异位性马赛克突变 (p.Q639*),该突变发生在一个ASD患者身上,该患者有一个未受影响的同卵双胞胎.
- 在另一位来自健康母亲的男性自闭症患者中发现了相同的TRAP1变异.
- 陷1 p.Q641*小鼠表现出与自闭症相关的行为异常,在雄性中更为明显,与突触可塑性和线粒体呼吸的性别特异性变化一起.
结论:
- 这种TRAP1 p.Q639*突变代表了与线粒体蛋白质平衡受损相关的ASD的第一个已确定的单一性原因.
- 这一发现突显了线粒体伴侣在神经发育障碍中的关键作用.
- 这项研究强调了TRAP1突变在与自闭症相关的表型中的性别特异性影响.
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