药理学阻断大麻素受体2信号传递不会影响LPS/IFN-γ诱导的微质激活
Bolanle Fatimat Olabiyi1, Anne-Caroline Schmoele1, Eva Carolina Beins1,2
1Institute of Molecular Psychiatry, Medical Faculty, University of Bonn, Bonn, Germany.
Scientific reports
|July 10, 2023
概括
大麻素受体2 (CB2) 的遗传删除减少了微质激活. 然而,急性CB2抑制并不能模仿这种效应,这表明CB2缺乏小鼠的适应机制.
科学领域:
- 神经科学是一个神经科学.
- 免疫学 免疫学 免疫学
- 药理学 药理学是指药理学的学科.
背景情况:
- 大麻素受体2 (CB2) 信号影响微质对炎症的反应.
- 之前的研究表明,基因CB2缺失抑制了微质激活,以应对TLR或神经退行.
- 构成性CB2淘汰可能会对发育产生影响,需要对急性抑制进行调查.
研究的目的:
- 为了确定急性药理抑制CB2是否模仿在CB2淘汰小鼠中观察到的抗炎作用.
- 研究CB2抗对微质激活和细胞因子分泌的影响.
主要方法:
- 使用了初级微质和器官类型的海马片培养物.
- 使用LPS/IFN-γ刺激来诱导炎症反应.
- 特定于CB2的抗体SR144528在纳米和微分子度下被使用.
- 评估了微质激活标志物 (细胞因子分泌,Iba1,CD68染色,形态).
主要成果:
- 在纳米分子度 (1和10 nM) 中,SR144528对LPS/IFN-γ诱导的微质激活几乎没有影响.
- 高度 (1μM) 的SR144528抑制了微质激活,但这种效果并不依赖CB2.
- 在1μM的抗炎作用超过了受体的Ki超过一千倍.
结论:
- 对CB2的急性药理抑制不会复制CB2淘汰微质体中观察到的抗炎作用.
- 在CB2淘汰小鼠中观察到的抗炎作用可能是CB2删除引发的适应机制的结果.
- 缺乏CB2的小鼠中的微细胞可能会由于这些适应性变化,对炎症刺激的反应能力降低.
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