Titanium dioxide nanoparticles induce emphysema-like lung injury in mice

Huei Wen Chen, Sheng Fang Su, Chiang Ting Chien, Wei Hsiang Lin, Sung Liang Yu, Cheng Chung Chou, Jeremy J.W. Chen, Pan Chyr Yang*


研究成果: 雜誌貢獻期刊論文同行評審

302 引文 斯高帕斯(Scopus)


Titanium dioxide nanoparticles (nano-TiO2) have been widely used as a photocatalyst in air and water cleaning. However, these nanoparticles inhalation can induce pulmonary toxicity and its mechanism is not fully understood. In this study we investigated the pulmonary toxicity of nanoTiO 2 and its molecular pathogenesis. The adult male ICR mice were exposed to intratracheal single dose of 0.1 or 0.5 mg nanoTiO2 (19-21 nm) and lung tissues were collected at 3rd day, 1st wk, and 2nd wk for morphometric, microarray gene expression, and pathway analyses. NanoTiO 2 can induce pulmonary emphysema, macrophages accumulation, extensive disruption of alveolar septa, type II pneumocyte hyperplasia, and epithelial cell apoptosis. NanoTiO2 induced differential expression of hundreds of genes include activation of pathways involved in cell cycle, apoptosis, chemokines, and complement cascades. In particular, nanoTiO2 up-regulates placenta growth factor (PlGF) and other chemokines (CXCL1, CXCL5, and CCL3) expressions that may cause pulmonary emphysema and alveolar epithelial cell apoptosis. Cultured human THP-1 cell-derived macrophages treated with nanoTiO2 in vitro also resulted in upregulations of PlGF, CXCL1, CXCL5, and CCL3. These results indicated that nanoTiO2 can induce severe pulmonary emphysema, which may be caused by activation of PlGF and related inflammatory pathways.

頁(從 - 到)E1732-E1741
期刊FASEB Journal
出版狀態已發佈 - 2006 11月

ASJC Scopus subject areas

  • 生物技術
  • 生物化學
  • 分子生物學
  • 遺傳學


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