Comparative Proteomic Analysis of Rat Bronchoalveolar Lavage Fluid after Exposure to Zinc Oxide Nanoparticles

Zinc oxide nanoparticles (ZnO NPs) are one of the most widely used nanomaterials in consumer products and industrial applications. As a result of all these uses, this has raised concerns regarding their potential toxicity. The authors previously found that candidate markers of idiopathic pulmonary fibrosis and lung cancer were significantly up-regulated in rat bronchoalveolar lavage fluid (BALF) following exposure to ZnO NPs by using a liquid chromatography (LC)-based proteomic approach. To achieve comprehensive protein identification analysis, the two-dimensional gel electrophosis (2-DE)-based proteomic workflow was used to analyse the differences in BALF proteins from rats that had been exposed to a high dose of 35?nm ZnO NPs. A total of 31 differentially expressed protein spots were excised from the gels and analysed by nanoLC-tandem mass spectrometry (MS/MS). Gene ontology (GO) annotation of these proteins showed that most of the differentially expressed proteins were involved in response to stimulus and inflammatory response processes. Moreover, pulmonary surfactant-associated protein D and gelsolin, biomarkers of idiopathic pulmonary fibrosis, were significantly up-regulated in rat BALF after ZnO NPs exposure (2.42- and 2.84-fold, respectively). The results obtained from this present study could provide a complementary consequence with our previous study and contribute to a better understanding of the molecular mechanisms involved in ZnO NP-induced lung disorders.

Authors: Juang YM, Chien HJ, Yang CY, Yeh HC, Cheng TJ, Lai CC. ;Full Source: Mass Spectrometry (Tokyo). 2017;6(2): S0066. doi: 10.5702/mass spectrometry. S0066. Epub 2017 Mar 24. ;