Time-dependent subcellular distribution and effects of carbon nanotubes in lungs of mice

Pulmonary deposited carbon nanotubes (CNTs) are cleared very slowly from the lung, but there is limited information on how CNTs interact with the lung tissue over time. To address this, three different multiwalled CNTs were intratracheally instilled into female C57BL/6 mice: one short (850 nm) and t...

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Veröffentlicht in:PloS one 2015-01, Vol.10 (1), p.e0116481-e0116481
Hauptverfasser: Købler, Carsten, Poulsen, Sarah S, Saber, Anne T, Jacobsen, Nicklas R, Wallin, Håkan, Yauk, Carole L, Halappanavar, Sabina, Vogel, Ulla, Qvortrup, Klaus, Mølhave, Kristian
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container_title PloS one
container_volume 10
creator Købler, Carsten
Poulsen, Sarah S
Saber, Anne T
Jacobsen, Nicklas R
Wallin, Håkan
Yauk, Carole L
Halappanavar, Sabina
Vogel, Ulla
Qvortrup, Klaus
Mølhave, Kristian
description Pulmonary deposited carbon nanotubes (CNTs) are cleared very slowly from the lung, but there is limited information on how CNTs interact with the lung tissue over time. To address this, three different multiwalled CNTs were intratracheally instilled into female C57BL/6 mice: one short (850 nm) and tangled, and two longer (4 μm and 5.7 μm) and thicker. We assessed the cellular interaction with these CNTs using transmission electron microscopy (TEM) 1, 3 and 28 days after instillation. TEM analysis revealed that the three CNTs followed the same overall progression pattern over time. Initially, CNTs were taken up either by a diffusion mechanism or via endocytosis. Then CNTs were agglomerated in vesicles in macrophages. Lastly, at 28 days post-exposure, evidence suggesting CNT escape from vesicle enclosures were found. The longer and thicker CNTs more often perturbed and escaped vesicular enclosures in macrophages compared to the smaller CNTs. Bronchoalveolar lavage (BAL) showed that the CNT exposure induced both an eosinophil influx and also eosinophilic crystalline pneumonia. Two very different types of multiwalled CNTs had very similar pattern of cellular interactions in lung tissue, with the longer and thicker CNTs resulting in more severe effects in terms of eosinophil influx and incidence of eosinophilic crystalline pneumonia (ECP).
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subjects Allergies
Alveoli
Animals
Bronchoalveolar lavage
Bronchoalveolar Lavage Fluid - chemistry
Bronchus
Carbon
Carbon nanotubes
Crystal structure
Crystallinity
Electron microscopy
Enclosures
Endocytosis
Exposure
Female
Gene expression
Health sciences
House mouse
Immunology
Inflammation
Leukocytes (eosinophilic)
Lung - drug effects
Lung - ultrastructure
Lungs
Macrophages
Mice
Mice, Inbred C57BL
Microscopy, Electron, Transmission - methods
Nanotechnology
Nanotubes
Nanotubes, Carbon - toxicity
Nanotubes, Carbon - ultrastructure
Neutrophils
Particle Size
Pneumonia
Pulmonary Eosinophilia - chemically induced
Studies
Time Factors
Toxicology
Transmission electron microscopy
title Time-dependent subcellular distribution and effects of carbon nanotubes in lungs of mice
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