自闭症基因变异破坏肠道神经元迁移,并导致胃肠道动力障碍
bioRxiv : the preprint server for biology
|June 10, 2024
概括
自闭症风险基因与肠道神经元发育有关,这可能解释自闭症患者的胃肠道问题. 针对血清激素信号的治疗有望缓解肠道动力障碍.
科学领域:
- 神经科学是一个神经科学.
- 发展生物学 发展生物学
- 胃肠病学 胃肠病学
背景情况:
- 自闭症谱系障碍 (ASD) 经常与严重的胃肠道 (GI) 症状同时发生.
- 连接ASD和胃肠道功能障碍的潜在分子机制尚未得到充分理解.
研究的目的:
- 研究高信心,大效应自闭症风险基因在肠道神经系统的发展和功能中的作用.
- 确定这些基因的破坏是否有助于在ASD患者中观察到的胃肠道不运动.
主要方法:
- 在人类产前肠道神经元和前代中检查了ASD风险基因的表达.
- 评估了16个ASD风险基因变异的患者的胃肠道问题.
- 使用*Xenopus tropicalis*研究针对五个自闭症风险基因 (SYNGAP1,CHD8,SCN2A,CHD2,DYRK1A) 对肠道神经元迁移的影响.
- 研究了DYRK1A扰乱对肠道运动性的影响,并测试了潜在的治疗干预措施.
主要成果:
- 在发育的肠道神经元和它们的祖先中,ASD风险基因被丰富.
- 患有这些基因变异的患者表现出胃肠道问题,特别是动力障碍.
- 针对*Xenopus tropicalis*中五个自闭症风险基因,破坏了肠道神经元前体迁移.
- DYRK1A的干扰导致了*体内*的肠道动力障碍,这种情况通过埃斯基塔洛普拉姆或一种血清素受体6激动剂得到改善.
结论:
- 肠道神经元的异常发育受到ASD相关基因的影响,可能会导致自闭症的胃肠道疾病.
- 血激素信号通路代表了在患有自闭症的个体中管理胃肠道不运动的潜在治疗标.
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