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在小鼠中由TAAR1部分激动诱导的清醒是通过多巴胺基神经递质介导的
Sunmee Park1, Jasmine Heu1, Marius C Hoener2
1Center for Neuroscience, Biosciences Division, SRI International, Menlo Park, CA 94025, USA.
International journal of molecular sciences
|November 9, 2024
概括
微量氨基关联受体1 (TAAR1) 激动剂RO5263397增加了清醒. 多巴胺受体对抗剂部分逆转了清醒和NREM睡眠延迟,但没有抑制REM睡眠,表明复杂的TAAR1-多巴胺相互作用.
科学领域:
- 神经科学是一个神经科学.
- 药理学 药理学是指药理学的学科.
- 睡眠医学 睡眠医学
背景情况:
- 微氨基关联受体1 (TAAR1) 是多巴胺 (DA) 释放的负调节者.
- TAAR1激动剂,如RO5263397,促进清醒,并抑制NREM和REM睡眠.
- 基于TAAR1对睡眠和清醒调节的影响的精确机制,特别是涉及多巴胺通路,需要进一步阐明.
研究的目的:
- 研究多巴胺D1和D2受体 (D1R和D2R) 在调解TAAR1激动剂RO5263397.7.的睡眠和清醒效应中的作用.
- 测试假设TAAR1诱导的睡眠结构变化部分由多巴胺释放介导.
主要方法:
- 雄性C57BL6/J小鼠接受了D1R抗剂 (SCH23390),D2R抗剂 (乙烯),联合抗剂或盐水的预治疗.
- 在服用抗剂后,小鼠接受了RO5263397或车载.
- 记录了脑电图 (EEG),心电图 (EMG),温度和活动,以分析睡眠结构.
主要成果:
- RO5263397增加了清醒,并延迟了NREM和REM睡眠的开始,与之前的发现一致.
- D1R,D2R和联合对抗剂预治疗减弱了RO5263397诱导的清醒.
- 只有D1R对抗剂显著降低了NREM睡眠开始的延迟,而这两种对抗剂都没有影响REM睡眠抑制.
结论:
- TAAR1介导的清醒涉及D2R和D1R通道.
- 特别是D1R激活在抵消TAAR1介导的NREM睡眠延迟增加方面发挥着作用.
- TAAR1诱导的REM睡眠抑制似乎没有通过D1R或D2R机制进行调解.
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