暴露于煤尘会通过激活IL6/ERK1/2/SP1信号通路而加剧认知障碍
Fulin Cai1, Sheng Xue2, Zan Zhou3
1The First Affiliated Hospital, Anhui University of Science and Technology, Huainan, Anhui, China; Anhui University of Science and Technology, Huainan 232001, China.
The Science of the total environment
|June 26, 2024
概括
煤尘暴露会使阿尔茨海默氏症和MCI患者的认知障碍恶化. 它通过提高INTERLEUQIN-6 (IL6) 和APOLIPROTEIN E4 (AOPE4) 水平增加神经炎症,从而损害神经元.
科学领域:
- 环境健康 环境健康
- 神经科学是一个神经科学.
- 毒理学 毒理学 毒理学
背景情况:
- 煤灰是已知的污染物,对肺部健康有记录的影响.
- 流行病学研究表明,接触煤灰会影响认知功能.
- 关于煤尘影响轻度认知障碍 (MCI) 和阿尔茨海默病 (AD) 患者认知能力的具体机制的研究有限.
研究的目的:
- 研究煤灰暴露对神经炎症和认知能力的影响.
- 在动物模型和人类样本中阐明煤尘引起的认知衰退的潜在机制.
- 探讨介质素-6 (IL6) 和阿波蛋白E4 (AOPE4) 在与煤尘相关的认知障碍中的作用.
主要方法:
- 动物模型 (APP/PS1小鼠) 的开发和临床人口样本的利用.
- 对认知障碍,神经炎症标志物 (IL6,AOPE4) 和神经元损伤的评估.
- 对MCI患者和正常个体进行周围血液测序.
- 在体外细胞实验中确定IL6,SP1,ERK1/2和AOPE4.2之间的机械联系.
主要成果:
- 在APP/PS1小鼠中,暴露于煤尘会加剧认知障碍和神经元损伤.
- 在暴露的小鼠的海马体中观察到高水平的神经炎症因子Apolipoprotein E4 (AOPE4) 和Interleukin-6 (IL6).
- 与对照组相比,在MCI患者的外周血液中发现了AOPE4,中性粒细胞和IL6的显著上调.
- 细胞实验表明,IL6通过ERK1/2的酸化和SP1.1的增强促进AOPE4的表达.
结论:
- 煤尘暴露显著恶化了MCI和AD患者的认知障碍.
- 该研究确定了一种机制,即煤灰促进IL6和AOPE4的上调,导致神经炎症和认知能力下降.
- 研究结果强调了煤尘对神经健康的有害影响,特别是在弱势群体中.
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