性别特定的皮质网络驱动自闭症谱系障碍模型中的社会行为差异
Mariana Lapo Pais1,2,3, José Sereno2,3,4, Vanessa A Tomé2,5
1University of Coimbra, Faculty of Sciences and Technology, Coimbra, Portugal.
Translational psychiatry
|July 21, 2025
概括
自闭症谱系障碍 (ASD) 中的性别差异社会行为源于明显的皮质神经生理学变化. 在小鼠模型中,女性和男性的改变的血清激素系统和大脑连接性有助于这些性别特异性的社会缺陷.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
- 行为科学 行为科学
背景情况:
- 自闭症谱系障碍 (ASD) 中的社会行为缺陷与大脑网络功能障碍有关.
- 患有自闭症的女性往往比男性表现出较轻微的社会障碍,但潜在的神经生物学基础尚不清楚.
- 大脑神经生理学中的性别特异性改变可能解释了ASD中社会行为中观察到的这些性别差异.
研究的目的:
- 研究皮质神经生理学的性别特异性变化及其与ASD遗传小鼠模型 (Tsc2+/-小鼠) 社会行为的关系.
- 确定神经元形态的性别依赖性变化,血清能系统,兴奋/抑制 (E/I) 平衡和结构连接性是否有助于ASD的性二态社会行为.
主要方法:
- 使用雄性和雌性Tsc2+/-小鼠作为ASD的遗传模型.
- 检查了皮质神经元形态,血清能系统组件 (5-HT1A受体密度),E/I平衡和结构连接 (皮质-桃体-海马体电路).
- 评估社会行为,包括社交性和社会新性,并将这些与神经生理学发现相关联.
主要成果:
- Tsc2+/-雄性表现出减少的树突复杂性,而雌性表现出改变的尖端树突.
- 只有Tsc2+/-的女性表现出血清系统和E/I平衡的变化,-5-HT1A受体密度降低和兴奋性增加.
- 观察到结构连接的性别依赖性变化,以及性别特异性的社会行为缺陷 (女性社交能力下降,男性社会新奇缺陷). 更好的社会表现与皮质神经质系统相关.
结论:
- 皮质神经生理学的性别特异性变化,特别是涉及到血清能系统和E / I平衡,存在于Tsc2+/-ASD小鼠模型中.
- 这些神经生理学性差异与两性社会行为有关,这表明存在因果关系.
- 这些发现突出了性别依赖的神经生物学机制在塑造ASD社会行为结果中的关键作用.
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