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Wiebert, P.* ; Sanchez-Crespo, A.* ; Seitz, J.* ; Falk, R.* ; Philipson, K.* ; Kreyling, W.G. ; Möller, W. ; Sommerer, K.* ; Larsson, S.* ; Svartengren, M.*

Negligible clearance of ultrafine particles retained in healthy and affected human lungs.

Eur. Respir. J. 28, 286-290 (2006)
DOI PMC
Open Access Green möglich sobald Postprint bei der ZB eingereicht worden ist.
Ambient particles are believed to be a specific health hazard, although the underlying mechanisms are not fully understood. There are data in the literature indicating fast and substantial systemic uptake of particles from the lung. The present authors have developed an improved method to produce ultrafine particles with more stable radiolabelling and defined particle size range. Fifteen subjects inhaled technetium 99m (99mTc)-labelled carbonaceous particles of 100 nm in size. Radioactivity over the lung was followed for 70 h. The clearance of these ultrafine particles from the lungs and specifically translocation to the circulation was tested. Lung retention for all subjects at 46 h was mean+/-sd 99+/-4.6%. Cumulative leaching of 99mTc activity from the particles was 2.6+/-0.96% at 70 h. The 24-h activity leaching in urine was 1.0+/-0.55%. No evidence of a quantitatively important translocation of 100-nm particles to the systemic circulation from the lungs was found. More research is needed to establish if the approximately 1% cleared activity originates from leached activity or insoluble translocated particles, and whether a few per cent of translocated particles is sufficient to cause harmful effects.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Korrespondenzautor
Schlagwörter air pollution; circulation; clearance; ultrafine particles
ISSN (print) / ISBN 0903-1936
e-ISSN 1399-3003
Zeitschrift European Respiratory Journal
Quellenangaben Band: 28, Heft: 2, Seiten: 286-290 Artikelnummer: , Supplement: ,
Verlag European Respiratory Society
Verlagsort Sheffield
Nichtpatentliteratur Publikationen
Begutachtungsstatus Peer reviewed
Institut(e) Institute of Lung Health and Immunity (LHI)