Inhaled carbon nanotubes reach the subpleural tissue in mice.

Inhaled carbon nanotubes reach the subpleural tissue in mice.
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DOI:
10.1038/nnano.2009.305
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发表时间:
2009-11
影响因子:
38.3
通讯作者:
--
中科院分区:
材料科学1区
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--
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Carbon nanotubes have fibre-like shape and stimulate inflammation at the surface of the peritoneum when injected into the abdominal cavity of mice, raising concerns that inhaled nanotubes may cause pleural fibrosis and/or mesothelioma. Here we show that multi-walled carbon nanotubes reach the sub-pleura in mice after a single inhalation exposure of 30 mg/m3 for 6 hours. Nanotubes were embedded in the sub-pleural wall and within sub-pleural macrophages. Mononuclear cell aggregates on the pleural surface increased in number and size after 1 day and nanotube-containing macrophages were observed within these foci. Sub-pleural fibrosis increased after 2 and 6 weeks following inhalation. None of these effects were seen in mice that inhaled carbon black nanoparticles or a lower dose of nanotubes (1 mg/m3). This work advances a growing literature on pulmonary toxicology of nanotubes and suggests that minimizing inhalation of nanotubes during handling is prudent until further long term assessments are conducted.
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