DISC1和GABA信号之间的相互作用调节小鼠的神经发生和精神分裂症风险
Ju Young Kim1, Cindy Y Liu, Fengyu Zhang
1Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
Cell
|March 6, 2012
概括
发现了精神分裂症中断1 (DISC1) 如何通过GABA信号传递和AKT-mTOR通路调节成年大脑中新生儿神经元的发育. 这一发现影响了对神经发生和精神分裂症风险的理解.
科学领域:
- 神经科学是一个神经科学.
- 发育生物学 发展生物学
- 遗传学 是一个遗传学.
背景情况:
- 持续的神经发生发生在产后哺乳动物大脑,但内在和外在因素的相互作用调节它仍然不清楚.
- 精神分裂症中断1 (DISC1) 与精神障碍有关,但其在神经发生过程中的确切作用尚未完全理解.
研究的目的:
- 调查精神分裂症中断1 (DISC1) 如何与外部刺激相互作用,以调节出生后哺乳动物大脑中的神经发生.
- 阐明DISC1介导的新生儿神经元中树突发育的调节背后的分子机制.
主要方法:
- 利用小鼠模型研究成年海马神经发生.
- 研究了神经递质GABA,NKCC1运输体和AKT-mTOR途径在DISC1-依赖神经发生过程中的作用.
- 进行了病例控制研究,以检查DISC1和NKCC1在精神分裂症风险中的相互作用.
主要成果:
- DISC1通过依赖NKCC1和AKT-mTOR通路的GABA诱导脱极化调节成人海马中新生儿神经元的树突发育.
- 当GABA脱极化转化为超极化时,DISC1对早产后神经发生的调节受损,但可以通过扩展脱极化或通过母亲的剥夺压力恢复.
- DISC1和NKCC1显示出影响精神分裂症风险的表皮相互作用.
结论:
- 在控制神经发生过程中发现了内在DISC1和外在GABA信号之间的相互作用.
- 突出了发育时间和环境经验 (例如,母亲的剥夺) 在调解敏感性基因对神经元发育和精神障碍风险的影响中的关键作用.
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