抑制proBDNF到成熟的BDNF转化导致体内类似ASD的表型
Feng Yang1,2, He You2,3, Toshiyuki Mizui4
1China National Clinical Research Center for Neurological Diseases, Basic and Translational Medicine Center, Beijing Tiantan Hospital, Capital Medical University, 100070, Beijing, China.
Molecular psychiatry
|May 18, 2024
概括
在大脑中,亲脑衍生神经营养因子 (proBDNF) 转化为成熟的BDNF (mBDNF) 的改变会导致小鼠的自闭症谱系障碍 (ASD) 类行为. 血proBDNF/mBDNF比率的增加可能作为ASD生物标志物.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 遗传学 是一个
- 发展生物学 发展生物学
背景情况:
- 自闭症谱系障碍 (ASD) 是一种具有遗传异质性的神经发育障碍.
- 突触功能在ASD中至关重要,由proBDNF和成熟的BDNF (mBDNF) 反对调节.
- proBDNF 抑制突触,而 mBDNF 强化它们.
研究的目的:
- 调查proBDNF转化为mBDNF在ASD病变发生过程中的作用.
- 为了生成和描述一个小鼠模型,对proBDNF转换到mBDNF转换有损.
- 探索血proBDNF/mBDNF比率作为ASD生物标志物的潜力.
主要方法:
- 产生一个敲入鼠标线 (BDNFmet/leu) 与减弱的proBDNF转换为mBDNF.
- 对大脑中的proBDNF和mBDNF水平的生物化学分析.
- 在海马体中评估突触结构,功能和可塑性.
- 对类似自闭症现象的行为测试 (刻板印象的行为,社交互动缺陷).
- 病例控制研究测量了ASD患者和健康儿童的血proBDNF/mBDNF比率.
主要成果:
- BDNFmet/leu小鼠表现出过度的大脑proBDNF和残留的mBDNF.
- 这些小鼠表现出减少的树枝状树木,改变的脊柱,以及受损的海马突触传输和可塑性.
- BDNFmet/leu小鼠表现出刻板印象的行为和社交互动缺陷,这表明了类似ASD的表型.
- 与对照组相比,在ASD患者中观察到血proBDNF/mBDNF比率显著增加.
结论:
- 大脑中proBDNF转化为mBDNF的缺陷有助于ASD病原和相关行为.
- 血proBDNF/mBDNF比率是诊断ASD的潜在敏感生物标志物.
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