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Inhalation of ultrafine carbon particles triggers biphasic pro-inflammatory response in the mouse lung.

Eur. Respir. J. 28, 275-285 (2006)
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High levels of particulate matter in ambient air are associated with increased respiratory and cardiovascular health problems. It has been hypothesised that it is the ultrafine particle fraction (diameter <100 nm) that is largely responsible for these effects. To evaluate the associated mechanisms on a molecular level, the current authors applied an expression profiling approach. Healthy mice were exposed to either ultrafine carbon particles (UFCPs; mass concentration 380 µg·m-3) or filtered air for 4 and 24 h. Histology of the lungs did not indicate any pathomorphological changes after inhalation. Examination of the bronchoalveolar lavage fluid revealed a small increase in polymorphonuclear cell number (ranging 0.6–1%) after UFCP inhalation, compared with clean air controls, suggesting a minor inflammatory response. However, DNA microarray profile analysis revealed a clearly biphasic response to particle exposure. After 4 h of inhalation, mainly heat shock proteins were induced, whereas after 24 h, different immunomodulatory proteins (osteopontin, galectin-3 and lipocalin-2) were upregulated in alveolar macrophages and septal cells. In conclusion, these data indicate that inhalation of ultrafine carbon particles triggers a biphasic pro-inflammatory process in the lung, involving the activation of macrophages and the upregulation of immunomodulatory proteins.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Schlagwörter air pollution; alveolar macrophages; cytokine; expression profiling
Sprache englisch
Veröffentlichungsjahr 2006
HGF-Berichtsjahr 0
ISSN (print) / ISBN 0903-1936
e-ISSN 1399-3003
Quellenangaben Band: 28, Heft: 2, Seiten: 275-285 Artikelnummer: , Supplement: ,
Verlag European Respiratory Society
Verlagsort Sheffield
Begutachtungsstatus Peer reviewed
Institut(e) Institute of Epidemiology (EPI)
Institute of Lung Health and Immunity (LHI)
POF Topic(s)
30202 - Environmental Health
Forschungsfeld(er)
Lung Research
PSP-Element(e) FE 73922
G-505000-001
Erfassungsdatum 2006-09-25