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Lung deposition and extrapulmonary translocation of nano-ceria after intratracheal instillation
He X(何潇); Zhang HF(张海凤); Ma YH(马宇辉); Bai W(白伟); Zhang ZY(张智勇); Ding YY(丁雅韵); Zhao YL(赵宇亮); Chai ZF(柴之芳); He, XA; Zhang, HF; Ma, YH; Bai, W; Zhang, ZY; Lu, K; Ding, YY; Zhao, YL; Chai, ZF
Source PublicationNANOTECHNOLOGY
Corresponding Author[He, Xiao ; Zhang, Haifeng ; Ma, Yuhui ; Bai, Wei ; Zhang, Zhiyong ; Ding, Yayun ; Zhao, Yuliang ; Chai, Zhifang] Chinese Acad Sci, CAS Key Lab Biomed Effects Nanomat & Nanosafety, CAS Key Lab Nucl Analyt Tech, Inst High Energy Phys, Beijing 100049, Peoples R China ; [Zhang, Haifeng] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China ; [Lu, Kai] S China Univ Technol, Sch Biol Sci & Engn, Guangzhou 510641, Peoples R China
AbstractThe broad potential applications of manufactured nanomaterials call for urgent assessment of their environmental and biological safety. However, most of the previous work focused on the cell level performance; little was known about the consequences of nanomaterial exposure at the whole-body and organ levels. In the present paper, the radiotracer technique was employed to study the pulmonary deposition and the translocation to secondary target organs after ceria nanoparticles (nano-ceria) were intratracheally instilled into Wistar rats. It was found that 63.9 +/- 8.2% of the instilled nano-ceria remained in the lung by 28 d postexposure and the elimination half-life was 103 d. At the end of the test period, only 1/8-1/3 of the daily elimination of nano-ceria from the lung was cleared via the gastrointestinal tract, suggesting that phagocytosis by alveolar macrophages (AMs) with subsequent removal towards the larynx was no longer the predominant route for the elimination of nano-ceria from the lung. The whole-body redistribution of nano-ceria demonstrated that the deposited nano-ceria could penetrate through the alveolar wall into the systemic circulation and accumulate in the extrapulmonary organs. In vitro study suggested that nano-ceria would agglomerate and form sediments in the bronchoalveolar aqueous surrounding while binding to protein would be conducive to the redispersion of nano-ceria. The decrease in the size of agglomerates might enhance the penetration of nano-ceria into the systemic circulation. Our findings suggested that the effect of nanomaterial exposure, even at low concentration, should be assessed because of the potential lung and systemic cumulative toxicity of the nanomaterials.
Subject AreaScience & Technology - Other Topics; Materials Science; Physics
Indexed BySCI ; ADS
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000279259100003
ADS Bibcode2010Nanot..21B5103H
ADS URLhttps://ui.adsabs.harvard.edu/abs/2010Nanot..21B5103H
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2010Nanot..21B5103H/citations
Citation statistics
Cited Times:8 [ADS]
Document Type期刊论文
First Author AffilicationInstitute of High Energy
Recommended Citation
GB/T 7714
He X,Zhang HF,Ma YH,et al. Lung deposition and extrapulmonary translocation of nano-ceria after intratracheal instillation[J]. NANOTECHNOLOGY,2010,21(28):285103.
APA 何潇.,张海凤.,马宇辉.,白伟.,张智勇.,...&Chai, ZF.(2010).Lung deposition and extrapulmonary translocation of nano-ceria after intratracheal instillation.NANOTECHNOLOGY,21(28),285103.
MLA 何潇,et al."Lung deposition and extrapulmonary translocation of nano-ceria after intratracheal instillation".NANOTECHNOLOGY 21.28(2010):285103.
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