國家衛生研究院 NHRI:Item 3990099045/6212

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Title:	Establishment of airborne nanoparticle exposure chamber system to assess nano TiO2 induced mice lung effects
Authors:	Chen, CH;Li, JP;Huang, NC;Yang, CS;Chen, JK
Contributors:	Center for Nanomedicine Research
Abstract:	A great many governments have schemed their top priority to support the research and development of emerging nanotechnology, which lead to increasing products containing nanomaterials. However, platforms and protocols to evaluate the safety of nanomaterials are not yet established. We therefore design and fabricate a nanoparticle exposure chamber system (NECS) and try to standardize protocols to assess potential health risk of inhalable nanoparticles. This platform comprises: (1) nano-aerosol generators to produce homogeneous airborne nanoparticles, (2) double isolated container to prevent from unexpected exposure to humans, (3) gas supply system for housing animals or incubating cultured cells, and (4) system for automatic control and airborne nanoparticle analysis. The NECS providing multiple functions includes: (1) a secure environment to handle nanomaterials, (2) real-time measurement for the size and distribution of airborne nanoparticles, (3) SOP of safety evaluation for nanomaterials, and (4) key technology for the development of inhalable pharmaceuticals. We used NECS to mimic occupational environment for exploring potential adverse effects of TiO2 nanoparticles. The adult male ICR mice were exposed to 25nm, well-characterized TiO2 particles for 1 and 4 weeks. More than 90% of the inhaled TiO2 nanoparticles deposit in lung tissue, which tends to be captured by alveolar macrophages. Pulmonary function test does not show significant physiological changes between one and 4 weeks exposure. For plasma biochemistry analysis, there are no obvious inflammation responses after exposure for one and 4 weeks; however, disruption of alveolar septa and increased thickness of alveolar epithelial cells were observed. According to our results, the NECS together with our protocols show comprehensive integration and ideally fit the standard of OECD guildelines-TG403, TG412, TG413; it can be further customized to fulfill diverse demands of industry, government, and third party contract research organization (CRO).
Date:	2011-09
Relation:	The 4th Nanoscience and Nanotechnology Symposium. 2011 Sep;1415:167-170.
Link to:	http://dx.doi.org/10.1063/1.3667248
Cited Times(WOS):	https://www.webofscience.com/wos/woscc/full-record/WOS:000299576800041
Cited Times(Scopus):	http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84255182807
Appears in Collections:	[Jen-Kun Chen] Conference Papers/Meeting Abstract [Chung-Shi Yang] Conference Papers/Meeting Abstract

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