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Airway contraction and cytokine release in isolated rat lungs induced by wear particles from the road and tire interface and road vehicle brakes
Occupational and Environmental Medicine, Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden.
Swedish National Road and Transport Research Institute (VTI), Linköping, Sweden.
Ergonomics and Aerosol Technology, Design Sciences, Lund University, Lund, Sweden.
Occupational and Environmental Medicine, Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden.
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2023 (English)In: Inhalation Toxicology, ISSN 0895-8378, E-ISSN 1091-7691, Vol. 35, no 13-14, p. 309-323Article in journal (Refereed) Published
Abstract [en]

The dominant road traffic particle sources are wear particles from the road and tire interface, and from vehicle brake pads. The aim of this work was to investigate the effect of road and brake wear particles on pulmonary function and biomarkers in isolated perfused rat lungs. Particles were sampled from the studded tire wear of three road pavements containing different rock materials in a road simulator; and from the wear of two brake pad materials using a pin-on-disk machine. Isolated rat lungs inhaled the coarse and fine fractions of the sampled particles resulting in an estimated total particle lung dose of 50 μg. The tidal volume (TV) was measured during the particle exposure and the following 50 min. Perfusate and BALF were analyzed for the cytokines TNF, CXCL1 and CCL3. The TV of lungs exposed to rock materials was significantly reduced after 25 min of exposure compared to the controls, for quartzite already after 4 min. The particles of the heavy-duty brake pads had no effect on the TV. Brake particles resulted in a significant elevation of CXCL1 in the perfusate. Brake particles showed significant elevations of all three measured cytokines, and quartzite showed a significant elevation of TNF in BALF. The study shows that the toxic effect on lungs exposed to airborne particles can be investigated using measurements of tidal volume. Furthermore, the study shows that the choice of rock material in road pavements has the potential to affect the toxicity of road wear PM10.

Place, publisher, year, edition, pages
Informa UK Limited , 2023. Vol. 35, no 13-14, p. 309-323
Keywords [en]
biomarkers, brake wear particles, isolated perfused lung, Pulmonary disorders, road wear particles, tidal volume
National Category
Other Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-341746DOI: 10.1080/08958378.2023.2289018ISI: 001114743100001PubMedID: 38054445Scopus ID: 2-s2.0-85179981752OAI: oai:DiVA.org:kth-341746DiVA, id: diva2:1823666
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QC 20240103

Available from: 2024-01-03 Created: 2024-01-03 Last updated: 2025-02-14Bibliographically approved

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Olofsson, Ulf

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