The mechanism of pleural inflammation by long carbon nanotubes: interaction of long fibres with macrophages stimulates them to amplify pro-inflammatory responses in mesothelial cells
<p>Abstract</p> <p>Carbon nanotubes (CNT) are high aspect ratio nanoparticles with diameters in the nanometre range but lengths extending up to hundreds of microns. The structural similarities between CNT and asbestos have raised concern that they may pose a similar inhalation haza...
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| Format: | Article |
| Language: | English |
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BMC
2012-04-01
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| Series: | Particle and Fibre Toxicology |
| Subjects: | |
| Online Access: | http://www.particleandfibretoxicology.com/content/9/1/8 |
| _version_ | 1811318131470106624 |
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| author | Murphy Fiona A Schinwald Anja Poland Craig A Donaldson Ken |
| author_facet | Murphy Fiona A Schinwald Anja Poland Craig A Donaldson Ken |
| author_sort | Murphy Fiona A |
| collection | DOAJ |
| description | <p>Abstract</p> <p>Carbon nanotubes (CNT) are high aspect ratio nanoparticles with diameters in the nanometre range but lengths extending up to hundreds of microns. The structural similarities between CNT and asbestos have raised concern that they may pose a similar inhalation hazard. Recently CNT have been shown to elicit a length-dependent, asbestos-like inflammatory response in the pleural cavity of mice, where long fibres caused inflammation but short fibres did not. However the cellular mechanisms governing this response have yet to be elucidated. This study examined the in vitro effects of a range of CNT for their ability to stimulate the release of the acute phase cytokines; IL-1β, TNFα, IL-6 and the chemokine, IL-8 from both Met5a mesothelial cells and THP-1 macrophages. Results showed that direct exposure to CNT resulted in significant cytokine release from the macrophages but not mesothelial cells. This pro-inflammatory response was length dependent but modest and was shown to be a result of frustrated phagocytosis. Furthermore the indirect actions of the CNT were examined by treating the mesothelial cells with conditioned media from CNT-treated macrophages. This resulted in a dramatic amplification of the cytokine release from the mesothelial cells, a response which could be attenuated by inhibition of phagocytosis during the initial macrophage CNT treatments. We therefore hypothesise that long fibres elicit an inflammatory response in the pleural cavity via frustrated phagocytosis in pleural macrophages. The activated macrophages then stimulate an amplified pro-inflammatory cytokine response from the adjacent pleural mesothelial cells. This mechanism for producing a pro-inflammatory environment in the pleural space exposed to long CNT has implications for the general understanding of fibre-related pleural disease and design of safe nanofibres.</p> |
| first_indexed | 2024-04-13T12:20:39Z |
| format | Article |
| id | doaj.art-75f7b7db048746ec804cca52018b88ba |
| institution | Directory Open Access Journal |
| issn | 1743-8977 |
| language | English |
| last_indexed | 2024-04-13T12:20:39Z |
| publishDate | 2012-04-01 |
| publisher | BMC |
| record_format | Article |
| series | Particle and Fibre Toxicology |
| spelling | doaj.art-75f7b7db048746ec804cca52018b88ba2022-12-22T02:47:13ZengBMCParticle and Fibre Toxicology1743-89772012-04-0191810.1186/1743-8977-9-8The mechanism of pleural inflammation by long carbon nanotubes: interaction of long fibres with macrophages stimulates them to amplify pro-inflammatory responses in mesothelial cellsMurphy Fiona ASchinwald AnjaPoland Craig ADonaldson Ken<p>Abstract</p> <p>Carbon nanotubes (CNT) are high aspect ratio nanoparticles with diameters in the nanometre range but lengths extending up to hundreds of microns. The structural similarities between CNT and asbestos have raised concern that they may pose a similar inhalation hazard. Recently CNT have been shown to elicit a length-dependent, asbestos-like inflammatory response in the pleural cavity of mice, where long fibres caused inflammation but short fibres did not. However the cellular mechanisms governing this response have yet to be elucidated. This study examined the in vitro effects of a range of CNT for their ability to stimulate the release of the acute phase cytokines; IL-1β, TNFα, IL-6 and the chemokine, IL-8 from both Met5a mesothelial cells and THP-1 macrophages. Results showed that direct exposure to CNT resulted in significant cytokine release from the macrophages but not mesothelial cells. This pro-inflammatory response was length dependent but modest and was shown to be a result of frustrated phagocytosis. Furthermore the indirect actions of the CNT were examined by treating the mesothelial cells with conditioned media from CNT-treated macrophages. This resulted in a dramatic amplification of the cytokine release from the mesothelial cells, a response which could be attenuated by inhibition of phagocytosis during the initial macrophage CNT treatments. We therefore hypothesise that long fibres elicit an inflammatory response in the pleural cavity via frustrated phagocytosis in pleural macrophages. The activated macrophages then stimulate an amplified pro-inflammatory cytokine response from the adjacent pleural mesothelial cells. This mechanism for producing a pro-inflammatory environment in the pleural space exposed to long CNT has implications for the general understanding of fibre-related pleural disease and design of safe nanofibres.</p>http://www.particleandfibretoxicology.com/content/9/1/8Carbon nanotubesPleuraMesotheliomaAsbestosInflammation |
| spellingShingle | Murphy Fiona A Schinwald Anja Poland Craig A Donaldson Ken The mechanism of pleural inflammation by long carbon nanotubes: interaction of long fibres with macrophages stimulates them to amplify pro-inflammatory responses in mesothelial cells Particle and Fibre Toxicology Carbon nanotubes Pleura Mesothelioma Asbestos Inflammation |
| title | The mechanism of pleural inflammation by long carbon nanotubes: interaction of long fibres with macrophages stimulates them to amplify pro-inflammatory responses in mesothelial cells |
| title_full | The mechanism of pleural inflammation by long carbon nanotubes: interaction of long fibres with macrophages stimulates them to amplify pro-inflammatory responses in mesothelial cells |
| title_fullStr | The mechanism of pleural inflammation by long carbon nanotubes: interaction of long fibres with macrophages stimulates them to amplify pro-inflammatory responses in mesothelial cells |
| title_full_unstemmed | The mechanism of pleural inflammation by long carbon nanotubes: interaction of long fibres with macrophages stimulates them to amplify pro-inflammatory responses in mesothelial cells |
| title_short | The mechanism of pleural inflammation by long carbon nanotubes: interaction of long fibres with macrophages stimulates them to amplify pro-inflammatory responses in mesothelial cells |
| title_sort | mechanism of pleural inflammation by long carbon nanotubes interaction of long fibres with macrophages stimulates them to amplify pro inflammatory responses in mesothelial cells |
| topic | Carbon nanotubes Pleura Mesothelioma Asbestos Inflammation |
| url | http://www.particleandfibretoxicology.com/content/9/1/8 |
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