由TAAR1诱导的清醒部分激动症是通过多巴胺基神经传递介导的
Sunmee Park1, Jasmine Heu1, Marius C Hoener2
1Center for Neuroscience, Biosciences Division, SRI International, Menlo Park, CA.
bioRxiv : the preprint server for biology
|September 24, 2024
概括
微氨基关联受体1 (TAAR1) 激动剂RO5263397促进清醒. 多巴胺受体对抗剂部分阻断TAAR1.
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.
- 睡眠研究 睡眠研究
背景情况:
- 微氨基关联受体1 (TAAR1) 负面调节多巴胺的释放.
- 在动物模型中,TAAR1激动剂,如RO5263397,促进清醒并抑制睡眠阶段.
研究的目的:
- 研究多巴胺受体 (D1R和D2R) 在调解TAAR1激动剂RO5263397.7.的睡眠和清醒效应中的作用.
- 为了测试TAAR1诱导的睡眠变化是由多巴胺释放调解的假设.
主要方法:
- 雄性小鼠接受了D1R抗剂 (SCH23390),D2R抗剂 (乙烯),联合抗剂或盐水的预治疗.
- 在预处理后,小鼠接受了RO5263397或车辆.
- 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增加了清醒和延迟到NREM和REM睡眠的时间.
- D1R和D2R抗剂预治疗部分减少了RO5263397诱导的清醒.
- 联合D1R+D2R对抗阻断了清醒,而D1R对抗减少了NREM延迟. 抗体对REM睡眠抑制没有影响.
结论:
- TAAR1的唤醒促进作用涉及D2R,而D1R影响NREM睡眠延迟.
- TAAR1介导的REM睡眠抑制似乎不涉及D1R或D2R机制.
- 多巴胺受体通路部分参与TAAR1对睡眠和清醒状态的调节.
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