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暴露于PM10会通过升高乙胆肌性3受体来诱导支气管过敏反应
Xue Xiao1, Yali Lei2, Tong Yao3
1Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, 76 Yanta West Road, Xi'an, Shaanxi 710061, China.
Toxicology and applied pharmacology
|July 17, 2024
概括
暴露于颗粒物 (PM) 增加了支气管过敏反应,通过通过ERK1/2通路调节CHRM3受体. 抑制这种途径可能为空气污染引起的呼吸道疾病提供治疗点.
科学领域:
- 环境健康 环境健康
- 呼吸系统医学 呼吸系统医学
- 分子生物学分子生物学
背景情况:
- 颗粒物 (PM) 暴露与呼吸系统疾病和支气管过敏反应有关.
- 导致PM10的支气管过敏反应的确切机制需要进一步阐明.
研究的目的:
- 为了研究PM10对大鼠支气管光滑肌中的乙胆肌性3受体 (CHRM3) 表达的作用.
- 确定ERK1/2信号通路在PM10诱导的支气管过敏反应中的作用.
主要方法:
- 鼠被暴露在PM10或过空气中2个月和4个月,其中一些接受MEK1/2抑制剂U0126.
- 肺功能和支气管收缩被评估使用全身囊造影和肌肉造影.
- 分析了CHRM3表达,ERK1/2酸化和炎症性细胞因子,这些分析是通过西式斑点,qPCR,免疫光和ELISA进行的.
主要成果:
- 4个月的PM10暴露显著增加了CHRM3表达和CHRM3介导的支气管收缩,导致支气管过敏反应.
- 暴露于PM10导致ERK1/2酸化和炎症性细胞因子分泌升高.
- U0126治疗逆转了PM10诱导的CHRM3上调,ERK1/2酸化和支气管收缩,减轻了病理变化.
结论:
- 暴露于PM10会诱导大鼠的支气管过敏反应,主要是通过CHRM3.3的上调调节.
- ERK1/2信号通路在调节PM10诱导的CHRM3上调和随后的支气管过敏反应方面发挥着至关重要的作用.
- 针对ERK1/2途径和CHRM3,为空气污染引起的呼吸道疾病提供了潜在的治疗策略.
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