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HERO ID
7717372
Reference Type
Journal Article
Title
A systematic review of the health effects associated with the inhalation of particle-filtered and whole diesel exhaust
Author(s)
Weitekamp, CA; Kerr, LB; Dishaw, L; Nichols, J; Lein, M; Stewart, MJ
Year
2020
Is Peer Reviewed?
Yes
Journal
Inhalation Toxicology
ISSN:
0895-8378
EISSN:
1091-7691
Volume
32
Issue
1
Page Numbers
1-13
Language
English
PMID
32100584
DOI
10.1080/08958378.2020.1725187
Web of Science Id
WOS:000516918400001
Abstract
Background: Diesel exhaust is a complex mixture comprised of gases and particulate matter and is a contributor to ambient air pollution. To reduce health risks, recent changes in diesel engine technology have significantly altered the composition of diesel exhaust, primarily by lowering emissions of particulate matter. However, animal toxicological studies continue to report health effects following exposure to diesel exhaust from engines employing particulate filters. The cause of these effects remains unclear.Objective and methods: To gain an understanding of the role of both particle-filtered and whole diesel exhaust on specific health outcomes, we conducted a systematic review in which we examined animal toxicological and controlled human exposure studies that included a comparison between inhalation of particle-filtered and whole diesel exhaust on any health endpoint.Results: We identified 26 studies that met both the inclusion and study evaluation criteria. For most health outcomes, the particle filtration methods employed in the included studies did not appreciably attenuate the health effects associated with exposure to whole diesel exhaust. There were also several health endpoints for which significant effects were associated with exposure to either particle-filtered or whole diesel exhaust, but not to both.Conclusions: Overall, the results from this systematic review demonstrate that exposure to different components in diesel exhaust can have distinct and independent health effects. Thus, to better inform human health risk assessments, future studies aimed at elucidating the health effects from diesel exhaust should include exposure to both particle-filtered and whole diesel exhaust.
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