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In vitro dissolution of uniform cobalt oxide particles by human and canine alveolar macrophages.

Am. J. Respir. Cell Mol. Biol. 2, 413-422 (1990)
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Intracellular dissolution of inhaled particles is an important pathway of clearance of potentially toxic materials. To study this process, monolayers of human and canine alveolar macrophages (AM) were maintained alive and functional in vitro for more than 2 wk. Complete phagocytosis of moderately soluble, monodisperse 57Co3O4 test particles of four different sizes was obtained by optimizing the cell density of the monolayer and the particle-to-cell ratio. The fraction of the initial particle mass that was soluble increased over time when the particles were ingested by AM but remained constant when in culture medium alone. Smaller particle sizes had a faster characteristic intracellular dissolution rate constant than did larger particles. The dissolution rates differed between AM obtained from two human volunteers as compared to those obtained from six mongrel dogs. These in vitro dissolution rates were very similar to in vivo translocation rates previously obtained from human and canine lung clearance studies after inhalation of the same or similar monodisperse, homogeneous 57Co3O4 test particles. We believe an important clearance mechanism for inhaled aerosol particles deposited in the lungs can be simulated in vitro in a cell culture system.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Sprache
Veröffentlichungsjahr 1990
HGF-Berichtsjahr 1990
ISSN (print) / ISBN 1044-1549
e-ISSN 1535-4989
Quellenangaben Band: 2, Heft: 5, Seiten: 413-422 Artikelnummer: , Supplement: ,
Verlag American Thoracic Society
Begutachtungsstatus Peer reviewed
Institut(e) Institut für Inhalationsbiologie
Scopus ID 0025424474
PubMed ID 2340182
Erfassungsdatum 1990-12-31