经验诱导的帕尔瓦胺表达篮细胞网络可塑性调节成人学习
Flavio Donato1, Santiago Belluco Rompani1, Pico Caroni1
1Friedrich Miescher Institut, Maulbeerstrasse 66, CH-4058 Basel, Switzerland.
Nature
|December 17, 2013
概括
成年人大脑的可塑性是由经验调节的. 环境的丰富和恐惧的条件诱导对立的变化parvalbumin (PV) 网络,影响学习和记忆. 这种可塑性可能会带来治疗效益.
科学领域:
- 神经科学是一个神经科学.
- 细胞神经科学 细胞神经科学
- 系统神经科学 系统神经科学
背景情况:
- 学习和记忆受到经验的影响,但潜在的机制仍然不清楚.
- 帕瓦胺 (PV) - 内核神经元网络的分化对于生命早期的可塑性至关重要.
- 最近的经验可能通过改变PV神经元分化来调节成人学习.
研究的目的:
- 研究环境丰富和恐惧调节如何改变成人海马PV网络配置.
- 确定这些网络配置在突触可塑性,记忆巩固和检索中的作用.
- 探索血管活性肠道多 (VIP) 阳性内神经元在经验诱导的可塑性中的参与.
主要方法:
- 成年小鼠的环境丰富和帕夫洛夫语境恐惧条件化.
- 药物遗传学操纵帕瓦胺 (PV) 神经元.
- 评估PV和GAD67表达,突触密度和结构突触可塑性.
- 迷宫导航和旋转杆学习任务.
- 对血管活性肠道多 (VIP) 阳性发疹和突触传播的分析.
主要成果:
- 丰富诱导低差异化的光伏网络 (低PV/GAD67,低E/I比率),增强可塑性和内存.
- 恐惧条件诱导高差异化的光伏网络 (高PV/GAD67,高E/I比率),降低了可塑性和内存.
- 迷宫学习最初诱导低PV网络,学习后转向高PV网络,涉及VIP按更改.
- 在运动学习期间,在运动皮质中观察到类似的VIP-PV网络配置.
结论:
- 经验导致成人海马PV篮细胞网络配置的持续,可逆变化.
- 塑性是由VIP-PV微电路变化调节的,影响学习,记忆巩固和检索.
- 这种新型的成人可塑性形式为认知增强和神经保护疗法提供了潜力.
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