由于暴露于纳米和微粒子而引起的SARS-CoV-2入口分子的表达和功能的变化
Raga Ishikawa1, Issei Omori2, Tomoya Sagawa3
1Graduate School of Global Environmental Studies, Kyoto University, Kyoto 615-8540, Japan.
Environment international
|January 25, 2026
概括
暴露于颗粒物 (PM) 可能通过影响关键的病毒进入分子增加严重的2019年新冠病毒病 (COVID-19) 的风险. 这项研究表明,特定的PM类型增强了ACE2和TMPRSS2的表达和活性.
科学领域:
- 环境健康 环境健康
- 分子生物学分子生物学
- 病毒学 病毒学
背景情况:
- 流行病学研究将颗粒物 (PM) 暴露与2019年冠状病毒病 (COVID-19) 严重程度的增加联系起来.
- 这种关联背后的精确分子机制在很大程度上仍未被阐明.
研究的目的:
- 研究暴露于不同类型的颗粒物如何影响ACE2和TMPRSS2.2的表达和功能.
- 确定潜在的治疗点,以减轻PM诱导的SARS-CoV-2进入的增强.
主要方法:
- 二型膜上皮细胞暴露于二氧化颗粒 (TiO2),柴油废气颗粒 (DEP) 和亚洲沙尘 (ASD).
- 测量了血管酶转化酶2 (ACE2) 和跨膜蛋白酶血清2 (TMPRSS2) 的表达和活性水平.
- 评估了像纳法莫斯塔特这样的血清蛋白酶抑制剂对PM诱导的TMPRSS2活性的影响.
主要成果:
- 二氧化颗粒 (TiO2) 显著增加了ACE2和TMPRSS2.2.的表达和活性.
- 亚洲沙尘 (ASD) 暴露增加了TMPRSS2活性,但没有影响ACE2表达.
- 纳法莫斯塔特表现出调节TMPRSS2活性的能力,这种能力在PM暴露时得到增强.
结论:
- 特定的颗粒物类型,特别是TiO2,可以增强SARS-CoV-2入口分子 (ACE2和TMPRSS2) 的表达和活性.
- 这种PM诱导的增强可能会促进SARS-CoV-2细胞内进入的增加,从而导致COVID-19的严重程度.
- 血清蛋白酶抑制剂代表了一种潜在的策略,以抵消PM介导的病毒进入的增加.
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