微塑料暴露会诱导HSP90α分泌,并通过PI3K-Akt-mTOR通路加剧喘性气道重塑
Mingming Xu1, Jiyuan Chen1, Lin Gao1
1Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, China.
Ecotoxicology and environmental safety
|February 9, 2025
概括
微塑料通过破坏呼吸道屏障并通过PI3K-Akt-mTOR通路引发炎症,恶化喘,从而损害肺部. 准热冲击蛋白90α (HSP90α) 可能会逆转这些效应.
科学领域:
- 环境健康 环境健康
- 肺部病理学 肺部病理学
- 毒理学 毒理学 毒理学
背景情况:
- 微塑料污染是普遍存在的,对人类健康构成风险.
- 进入呼吸系统的微塑料可以引起肺炎并加重喘.
- 微塑料引起的呼吸问题背后的精确机制尚未完全理解.
研究的目的:
- 研究微塑料如何影响热冲击蛋白90α (HSP90α) 分泌.
- 阐明微塑料在喘进展中的作用.
- 为了探索涉及的潜在分子通路.
主要方法:
- 评估微塑料对气道上皮质屏障完整性的影响.
- 分析HSP90α分泌物对微塑料的反应.
- 研究PI3K-Akt-mTOR通路的激活情况.
- 评估单克隆抗体对HSP90 (1G6-D7) 对喘症状的影响.
主要成果:
- 微塑料损坏了呼吸道上皮屏障,损害了HSP90α的分泌.
- 微塑料激活PI3K-Akt-mTOR通路,促进HSP90α的分泌和气道光滑肌细胞的增殖.
- 这些影响导致了气道狭窄和过敏.
- 用1G6-D7治疗逆转了肺炎,粘液产生和气道过敏反应.
结论:
- 微塑料通过PI3K-Akt-mTOR信号通路诱导炎症和气道过敏反应.
- 微塑料刺激呼吸道平滑肌肉细胞的增殖,导致喘.
- 这项研究揭示了微塑料引起的呼吸系统问题的新机制,有助于未来的研究和风险评估.
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