直接和巨细胞间接暴露于细颗粒物水体对血管内皮功能障碍的影响
Lílian Corrêa Costa-Beber1, Ricardo Maia Dantas1, Ariadni Mesquita Peres1
1Universidade Federal do Rio Grande do Sul (UFRGS), Department of Biochemistry, Porto Alegre, Rio Grande do Sul, Brazil.
Environmental pollution (Barking, Essex : 1987)
|May 10, 2025
概括
水性细颗粒物 (PM2.5) 直接伤害内皮,但巨细胞分泌的因素可能会保护它. 这项研究探讨了PM2.5的情况.
科学领域:
- 环境健康 环境健康
- 毒理学 毒理学 毒理学
- 细胞生物学 细胞生物学
背景情况:
- 细颗粒物 (PM2.5) 是已知的血管疾病风险因素.
- 激活的巨细胞释放炎症介质,影响内皮功能.
- PM2.5的极性化合物对循环内皮细胞的影响尚未完全理解.
研究的目的:
- 研究水性PM2.5对内皮细胞的直接和巨介导作用.
- 阐明巨细胞衍生因素在PM2.5诱导的内皮功能障碍中的作用.
- 探索对PM2.5.5的反应中单细胞-内皮细胞交叉的机制.
主要方法:
- 在CF-1小鼠中进行PM2.5的鼻内灌注,以诱导内皮功能障碍.
- 暴露RAW264.7巨细胞和EOMA内皮细胞的水性PM2.5.5暴露.
- 对氧化应激,炎症,氧化氧化物生产和洞穴素-1表达的分析.
- 对条件介质和血对内皮细胞的影响的评估.
主要成果:
- 暴露于PM2.5导致小鼠内皮功能障碍和氧化应激.
- 暴露于PM2.5的巨细胞表现出氧化应激和炎症.
- 巨受条件介质通过减少ROS和增加酸盐来改善内皮功能.
- 直接暴露于PM2.5引起了内皮功能障碍,与条件介质效应形成鲜明对比.
- 在暴露于条件介质的内皮细胞中,Caveolin-1被上调.
结论:
- 巨细胞的分泌物,而不是残留金属,似乎介导了对内皮细胞的保护作用.
- 直接暴露于水性PM2.5会导致内皮功能障碍.
- 巨细胞衍生因素可能通过涉及卡韦奥林-1的途径激活内皮细胞中的保护机制.
- 了解这些独特的影响对于评估PM2.5的心血管风险至关重要.
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