Cited by 400Air Quality and Health ImpactsAutophagy in Disease and TherapyIndoor Air Quality and Microbial Exposure

PM2.5-induced oxidative stress triggers autophagy in human lung epithelial A549 cells

Deng, Xiaobei, Zhang, Fang, Rui, Wei, Long, Fang, Wang, Lijuan, Feng, Zhaohan, Chen, Deliang, Ding, Wenjun·2013·Toxicology in Vitro

Abstract

Exposure to higher levels of air pollution particulate matter (PM) with an aerodynamic diameter of less than 2.5 μm (PM2.5) links with an increased risk of cardiovascular and respiratory deaths and hospital admission as well as lung cancer. Although the mechanism underlying the correlation between PM2.5 exposure and adverse effects has not fully elucidated, PM2.5-induced oxidative stress has been considered as an important molecular mechanism of PM2.5-mediated toxicity. In this work, human lung epithelial A549 cells were used to further investigate the biological effects of PM2.5 on autophagy. The cell viability showed both time- and concentration-dependent decrease when exposure to PM2.5, which can be attributed to increase of the levels of extracellular lactate dehydrogenase (LDH) release and intracellular reactive oxygen species (ROS) generation in A549 cells. Moreover, PM2.5-induced oxidative damage in A549 cells was observed through the alteration of superoxide dismutase (SOD) and catalase (CAT) activities compared to the unexposed control cells. PM2.5-induced autophagy was indicated by an increase in microtubule-associated protein light chain-3 (LC3) puncta, and accumulation of LC3 in both time- and concentration-dependent manner. PM2.5-induced mRNA expression of autophagy-related protein Atg5 and Beclin1 was also observed compared with those of the unexposed control cells. These results suggest the possibility that PM2.5-induced oxidative stress probably plays a key role in autophagy in A549 cells, which may contribute to PM2.5-induced impairment of pulmonary function.

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Crossref · 10.1016/j.tiv.2013.05.004

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Authors
Deng, X., Zhang, F., Rui, W., Long, F., Wang, L., Feng, Z., Chen, D., & Ding, W.
Affiliations
  • University of Chinese Academy of Sciences (CN)
  • Chinese Academy of Sciences (CN)
  • China-Japan Friendship Hospital (CN)
Corresponding author
  • Feng, Zhaohan
  • Ding, Wenjun
Venue
Toxicology in Vitro
Publisher
Elsevier BV
Published
2013-09
Volume
27
Issue
6
Pages
1762-1770
ISSN
0887-2333 (ISSN-L)
OpenAlex
W1981790437
Cited by
400
References
41
Citations by year
2026: 18 · 2025: 16 · 2024: 20 · 2023: 26 · 2022: 38 · 2021: 50 · 2020: 57 · 2019: 35 · 2018: 44 · 2017: 35 · 2016: 21 · 2015: 24 · 2014: 15 · 2013: 1
FWCI
14.95
Type
journal article
Language
en
Open access
closed
Locations
  • Toxicology in Vitro (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Gong-Yi Program of China Ministry of Environmental Protection (200909016)
  • National Natural Science Foundation of China (10875170)
  • the National Science and Technology Ministry of China (2007BAC27B02-2)
Topics
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Air Quality and Health Impacts
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Indoor Air Quality and Microbial Exposure
Keywords
PM2.5, particulate matter, oxidative stress, autophagy, A549 cells, lung epithelial cells, reactive oxygen species, superoxide dismutase, catalase, LC3, Beclin-1, ATG5, air pollution toxicity, lung function
MeSH terms
Air Pollutants, Autophagy, Catalase, Epithelial Cells, Humans, L-Lactate Dehydrogenase, Lung, Superoxide Dismutase, Reactive Oxygen Species, Oxidative Stress, Cell Line, Tumor, Particulate Matter

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