城市颗粒物中的AhR激进成分调节星体细胞活化和功能
Yuzhu Zhang1,2, Yao Pei1,2, Yumiao Sun1
1State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Environmental science & technology
|March 2, 2024
概括
城市颗粒物 (PM) 激活星球细胞,可能会恶化神经系统疾病. 这项研究表明,PM诱导了A1和A2天体细胞表型,通过阿里碳水化合物受体 (AhR) 通过多环芳香碳水化合物 (PAH) 进行介导.
科学领域:
- 神经科学是一个神经科学.
- 环境健康 环境健康
- 毒理学 毒理学 毒理学
背景情况:
- 大气颗粒物 (PM) 暴露与加速的神经疾病有关.
- 神经炎症是PM诱导的神经毒性的关键机制.
- 星球细胞在神经炎症和神经元支持中发挥着关键作用.
研究的目的:
- 调查城市大气PM对大鼠皮质天体细胞激活和功能的直接影响.
- 为了确定在星球细胞中因PM暴露引起的特定表型 (A1和A2).
- 确定基碳化合物受体 (AhR) 激动剂的作用,如多环芳 (PAHs),在PM介导的星细胞反应中.
主要方法:
- 用城市PM (SRM1648a) 的标准参考材料刺激大鼠皮质星球细胞.
- 对天体细胞激活标记物的基因表达 (mRNA水平) 的量化 (例如,Fkbp5,Sphk1,S100a10,Il6).
- 评估功能变化,包括神经营养因子表达 (Gdnf, Ngf),星球细胞运动性和化学激素表达.
- 对AhR阻塞对PM诱导的星细胞效应的影响的评估.
主要成果:
- SRM1648a诱导了A1和A2天体细胞表型标记物的度依赖性增加.
- 通过A2型激活,PM暴露上调了神经营养因子 (Gdnf,Ngf).
- SRM1648a促进了星球细胞的运动性和增加了化学激素的表达.
- 在PM中,AhR激动剂 (PAHs) 被确定为主要贡献者,AhR阻断减弱PM效应.
结论:
- 城市大气中的PM直接调节天体细胞的激活和功能.
- 微粒诱导明确的天体细胞表型 (A1/A2) 并改变它们的功能性质.
- 抗激素激活成分,特别是PAHs,是PM对星球细胞影响的关键媒介.
- 这些发现有助于更好地理解由环境细颗粒物污染引起的神经障碍.
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