4.7 Article

PM2.5 collected using cyclonic separation causes stronger biological responses than that collected using a conventional filtration method

期刊

ENVIRONMENTAL RESEARCH
卷 198, 期 -, 页码 -

出版社

ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.envres.2020.110490

关键词

Cyclone; Crude PM2; 5; Filter; Respiratory system; Immune system

资金

  1. Environmental Research and Technology Development Fund [5-1651]
  2. Ministry of the Environment, Japan

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PM2.5 collected through cyclonic separation induces stronger biological responses and higher levels of inflammatory reactions compared to PM2.5 collected through traditional filtration methods. This suggests that cyclonic separation can provide a more reliable evaluation of the health effects of ambient PM2.5.
Evaluation of the health effects of particulate matter with aerodynamic dias. < 2.5 mu m (PM2.5) should reflect realistic condition in ambient atmosphere. However, using conventional filtration methods, only extracts from PM2.5 collected on the filter can be analyzed and not the particle itself. Cyclonic separation is a technique that enables the direct analysis of the effects of the crude powder form of PM2.5 on respiratory health. Airway epithelial cells and antigen-presenting cells were exposed to PM2.5 collected during the same period using a conventional filtration method or cyclonic separation. PM2.5 collected using cyclonic separation led to a higher secretion of interleukins 6 and 8 (IL-6, IL-8) from airway epithelial cells, and IL-6, IL-1 beta, tumor necrosis factor-alpha (TNF-alpha) secretion, cluster of differentiation 86 (CD86), and dendritic and epithelial cells 205 (DEC205) expression on antigen-presenting cells, compared with the effects of filter-collected PM2.5. Furthermore, PM2.5 collected using cyclonic separation increased inflammatory cytokine levels and induced lung inflammation in vivo. These results suggest that crude PM2.5 collected using cyclonic separation causes stronger biological responses than filter-collected PM2.5. Hence, PM2.5 collected using cyclonic separation can be utilized for a reliable evaluation of the health effects of ambient PM2.5.

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