多巴氨基系统调解了侧面的habenula诱导的自主心血管反应
Yuma Sato1,2, Masayuki Matsumoto3,4, Tadachika Koganezawa1
1Department of Neurophysiology, Institute of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan.
Frontiers in physiology
|December 6, 2024
概括
侧面大脑管 (LHb) 通过中脑多巴胺作用系统影响心血管控制. 多巴胺受体和腹膜区域 (VTA) 是这些压力诱导的自主反应的关键调解者.
科学领域:
- 神经科学是一个神经科学.
- 心血管生理学心血管生理学
- 自主神经系统的自主神经系统
背景情况:
- 侧面囊 (LHb) 参与压力和自主控制,但其在压力期间心血管调节中的作用尚不清楚.
- LHb调节中脑单胺神经递质系统,包括多巴胺,血清激素和诺亚 adr.
研究的目的:
- 为了研究中脑多巴胺基系统在对LHb激活的心血管反应中的参与.
- 阐明多巴胺受体亚型和腹膜区域 (VTA) 在LHb介导的自主控制中的特定作用.
主要方法:
- 在尿麻醉的Wistar大鼠中LHb的电刺激.
- 服用多巴胺受体对抗剂 (非选择性和亚型选择性) 和VTA失活.
- 监测心率 (HR) 和血压 (BP) 以评估心血管反应.
主要成果:
- 激发LHb诱导了胸和压力反应,这两种反应都被非选择性多巴胺抗剂减弱.
- 多巴胺D1/D5,D2/D3和D4受体的选择性对抗剂减少了压力反应,但没有减少HR的变化.
- 静脉动脉阻断可以将LHb诱导的胸心转变为心动节拍,并减弱压力应答.
结论:
- LHb通过多巴胺基系统调节自主心血管反应.
- 多巴胺 D1 类和 D2 类受体介导由 LHb 激活启动的同情激发.
- 静脉动脉是LHb启动的心血管反应中关键的多巴胺活性成分.
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