Abstract:
:Compelling evidence shows that fine particulate matters (PMs) from air pollution penetrate lower airways and are associated with adverse health effects even within concentrations below those recommended by the WHO. A paper reported a dose-dependent link between carbon content in alveolar macrophages (assessed only by optical microscopy) and the decline in lung function. However, to the best of our knowledge, PM had never been accurately characterized inside human lung cells and the most responsible components of the particulate mix are still unknown. On another hand carbon nanotubes (CNTs) from natural and anthropogenic sources might be an important component of PM in both indoor and outdoor air. We used high-resolution transmission electron microscopy and energy dispersive X-ray spectroscopy to characterize PM present in broncho-alveolar lavage-fluids (n = 64) and inside lung cells (n = 5 patients) of asthmatic children. We show that inhaled PM mostly consist of CNTs. These CNTs are present in all examined samples and they are similar to those we found in dusts and vehicle exhausts collected in Paris, as well as to those previously characterized in ambient air in the USA, in spider webs in India, and in ice core. These results strongly suggest that humans are routinely exposed to CNTs.
journal_name
EBioMedicinejournal_title
EBioMedicineauthors
Kolosnjaj-Tabi J,Just J,Hartman KB,Laoudi Y,Boudjemaa S,Alloyeau D,Szwarc H,Wilson LJ,Moussa Fdoi
10.1016/j.ebiom.2015.10.012subject
Has Abstractpub_date
2015-10-09 00:00:00pages
1697-704issue
11issn
2352-3964pii
S2352-3964(15)30175-4journal_volume
2pub_type
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