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内皮SHANK3通过β-Catenin信号调节新生小鼠血脑屏障中紧密的结节
Yong-Eun Kim1,2, Minseong Kim3, Sunwhi Kim1,2
1Department of Anatomy and Neurobiology, University of Tennessee Health Science Center, Memphis, TN, USA.
Nature communications
|February 6, 2025
概括
SHANK3,一种自闭症谱系障碍 (ASD) 风险基因,影响新生小鼠的血脑屏障 (BBB). 这项研究揭示了BBB功能障碍是ASD发展的潜在机制.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
- 发展生物学 发展生物学
背景情况:
- 自闭症谱系障碍 (ASD) 是一种复杂的神经发育状况,受遗传和环境因素的影响.
- 血脑屏障 (BBB) 保护大脑,但其在ASD病变发生过程中的作用尚不清楚.
- 尚克3是已知的ASD风险基因,但其在BBB中的功能尚未被探索.
研究的目的:
- 研究ASD风险基因SHANK3在血脑屏障 (BBB) 中的作用.
- 确定SHANK3表达在脑内皮细胞 (BECs) 对BBB完整性和ASD相关行为的影响.
主要方法:
- 产生的内皮特异性Shank3淘汰 (eShank3 KO) 新生小鼠.
- 在突变小鼠中评估了BBB完整性,神经元刺激性和通信.
- 分析了分子机制,包括β-catenin信号传递,是BBB功能障碍的基础.
主要成果:
- 新生儿eShank3 KO小鼠表现出男性特有的BBB超透性,神经元刺激性降低,超声波通信受损.
- 成年后BBB透性正常化,但男性突变者保留了神经元刺激性降低和社交能力受损.
- BBB超透性与eShank3淘汰引起的β-catenin不平衡有关.
结论:
- SHANK3通过调节 BEC 中的紧密连接,在维护 BBB 完整性方面发挥着至关重要的作用.
- 由于SHANK3缺乏而导致的新生儿BBB功能障碍为ASD呈现了一种新的致病机制.
- 针对新生儿BEC和BBB功能,为ASD提供了一个潜在的治疗策略.
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