功能上不同的唤起和自发的神经传递通过内感应因子中的共享突触囊泡池运作
Rachel A Arnold1, James H Peters1
1Department of Integrative Physiology and Neuroscience, College of Veterinary Medicine, Washington State University, Pullman, WA, USA.
状 afferent神经元使用共享的囊泡池,用于自发和唤起的谷氨酸释放到孤独管 (NTS) 的核. 这种共同的囊泡池允许进行不同的监管控制,保留对内感官处理至关重要的信息类型.
科学领域:
- 神经科学是一个神经科学.
- 细胞生物学 细胞生物学
- 生理学 生理学 生理学
背景情况:
- 粘性感官信息由阴道 afferent神经元传输到孤独管 (NTS) 的脑干核.
- 从阴 afferent 终端释放的谷氨酸通过不同的唤起 (依赖作用电位) 和自发 (独立于活动) 途径发生.
- 在外围感官神经元中这些释放通路的基础上,囊泡池的组织 (常见与不同的) 仍然不清楚.
研究的目的:
- 确定用于唤起与自发性从阴道 afferent 终端释放谷氨酸的突触囊泡的功能组织.
- 调查单独或共享的囊泡池和后突触受体是否被不同的谷氨酸释放通路利用.
主要方法:
- 全细胞补丁电生理学是在急性脑干切片中的大鼠NTS神经元上进行的.
- 测量了Glutamatergic刺激后突触电流 (EPSCs).
- 药理学工具被用来抑制前突触囊泡的补充和阻断后突触NMDA受体.
主要成果:
- 唤起和自发的谷氨酸释放通路都利用了一个共同的前突触突触囊泡群.
- 一个共享的后突触NMDA受体群体是唤起和自发释放的谷氨酸的目标.
- 自发的谷氨酸释放会影响基线NTS神经元发射,但不会引起动作潜力的吞吐量.
结论:
- 阴道 afferent 终端采用一个共同的囊泡池,用于自发和唤起的谷氨酸释放.
- 清晰的控制和监管点管理这些释放途径,允许共享资源,同时保留信息.
- 这种囊泡处理策略对于内感知信息的传输至关重要.
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