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Effect of PM2.5 environmental pollution on rat lung

Author:
Yang, Biao, Guo, Jie, Xiao, Chunling
Source:
Environmental science and pollution research international 2018 v.25 no.36 pp. 36136-36146
ISSN:
0944-1344
Subject:
cytokines, edema, elastin, hydrogen peroxide, inflammation, lungs, macrophages, malondialdehyde, neutrophils, nitric oxide, oxidative stress, particulates, pollution, protein content, rats
Abstract:
Particulate matter smaller than 2.5 μm (PM2.5) is a continuing challenge to pulmonary health. Here, we investigated the mechanisms involved in PM2.5 exposure-induced acute lung injury in rats. We analyzed biochemical and morphological changes following a 2-week “real-world” exposure. And then we found that PM2.5 exposure increased the concentrations of total protein, malondialdehyde, hydrogen peroxide, nitric oxide, and soluble elastin in bronchoalveolar lavage fluid, levels of cytokines in blood, and expression of MMP-9 in airways. Further, alveolar macrophage and neutrophil counts increased following PM2.5 exposure, and edema and lung lesions were observed. Our results suggest that PM2.5 exposure can induce oxidative stress and acute inflammatory responses, which can damage the micro-environment and decrease the repair ability of the lung, resulting in tissue damage.
Agid:
6253360