人工光传感器揭示了前突触NMDA受体切换胆囊托基宁释放和海马中的LTP
Yin-Ting Wong1,2, Xuejiao Zheng1,3, Siu-Hin Lau1
1Department of Neuroscience, City University of Hong Kong, Kowloon Tong, Hong Kong.
Journal of neurochemistry
|May 15, 2024
概括
胆囊托基宁 (CCK) 对于老鼠大脑的长期强化 (LTP) 是至关重要的. 前突触NMDA受体控制CCK释放,这对于海马体LTP至关重要.
科学领域:
- 神经科学是一个神经科学.
- 突触性可塑性 突触性可塑性
- 分子生物学分子生物学
背景情况:
- 胆囊托基宁 (CCK) 在皮质突触的NMDA依赖长期增强 (LTP) 中起作用.
- CCK参与海马体LTP的确切机制尚未完全阐明.
研究的目的:
- 调查CCK对于高频刺激诱导的LTP在小鼠海马突触中的必要性.
- 确定轴突NMDA受体在调节CCK释放和随后的LTP中的作用.
主要方法:
- 高频激发海马突触的高频刺激.
- 在CCK神经元中减少NMDA受体子单元 (GluN1) 的基因操纵.
- 测量轴突 (Ca2+) 的升高.
- 对CCK细胞外和分泌的评估.
主要成果:
- CCK对于通过高频刺激诱导的LTP至关重要 鼠标海马突触的突触起源于内腔皮层.
- 活动诱导的LTP依赖于前突触CCK释放,由轴突NMDA受体调节.
- 在CCK神经元中GluN1亚单元的耗尽取消了轴突Ca2+升高,并破坏了CCK分泌.
结论:
- 活动诱导的海马突触中的LTP依赖于胆囊托基宁 (CCK).
- 前突触NMDA受体调节来自轴突终端的CCK分泌,影响LTP.
- 这突出了一个涉及CCK和NMDA受体在突触可塑性中的新奇机制.
相关概念视频
01:35Long-term Potentiation
Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre- and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
01:25Long-term Potentiation
Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
Hebbian LTP
LTP can occur when presynaptic neurons...
Hebbian LTP
LTP can occur when presynaptic neurons...