Brain-targeted distribution and high retention of silver by chronic intranasal instillation of silver nanoparticles and ions in Sprague-Dawley rats
文献类型：期刊论文
| 作者 | Wen, Ruoxi; Yang, Xiaoxi; Hu, Ligang; Sun, Cheng; Zhou, Qunfang; Jiang, Guibin |
| 刊名 | JOURNAL OF APPLIED TOXICOLOGY
 |
| 出版日期 | 2016-03 |
| 卷号 | 36期号:3页码:445-453 |
| 关键词 | silver nanoparticles intranasal instillation tissue distribution brain-targeted silver retention |
| 英文摘要 | The wide applications of silver nanoparticles (AgNPs) have been concerned regarding their unintentional toxicities. Different exposure modes may cause distinct accumulation, retention and elimination profiles, which are closely related with their toxicities. Unlike silver accumulation profiles through other regular administration modes, the biodistribution, accumulation and elimination of AgNPs by intranasal instillation are not fully understood. This study conducted intranasal instillation of polyvinylpyrrolidone-coated AgNPs in neonatal Sprague-Dawley rats at doses of 1 and 0.1 mg kg(-1) day(-1) for 4 and 12weeks, respectively. The 4-week recovery was also designed after the 12-week exposure. Silver concentrations in the main tissues or organs were periodically monitored. Parallel exposures using silver ion were performed for the comparative studies. No physiological alterations were observed in AgNP exposures. In comparison, 1 mg kg(-1) day(-1) silver ions decreased body weight gain and caused mortality of 18.2%, showing ionic silver had a relatively higher toxicity than AgNPs. A relatively higher silver accumulation was observed in silver ion groups than AgNP groups. The silver ion release could not fully explain silver accumulation in AgNP exposures, showing silver distribution caused by particulate silver occurred in vivo. The highest silver concentration was in the liver at week 4, while it shifted to the brain after a 12-week exposure. Dose-related silver accumulation occurred for both AgNP and silver ion groups. The time course revealed a uniquely high concentration and retention of brain silver, implying chronic intranasal instillation caused brain-targeted silver accumulation. These findings provided substantial evidence on the potential neuronal threat from the intranasal administration of AgNPs or silver colloid-based products. Copyright (C) 2015 John Wiley & Sons, Ltd. |
| 收录类别 | SCI |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/35810]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Wen, Ruoxi,Yang, Xiaoxi,Hu, Ligang,et al. Brain-targeted distribution and high retention of silver by chronic intranasal instillation of silver nanoparticles and ions in Sprague-Dawley rats[J]. JOURNAL OF APPLIED TOXICOLOGY,2016,36(3):445-453. |
| APA | Wen, Ruoxi,Yang, Xiaoxi,Hu, Ligang,Sun, Cheng,Zhou, Qunfang,&Jiang, Guibin.(2016).Brain-targeted distribution and high retention of silver by chronic intranasal instillation of silver nanoparticles and ions in Sprague-Dawley rats.JOURNAL OF APPLIED TOXICOLOGY,36(3),445-453. |
| MLA | Wen, Ruoxi,et al."Brain-targeted distribution and high retention of silver by chronic intranasal instillation of silver nanoparticles and ions in Sprague-Dawley rats".JOURNAL OF APPLIED TOXICOLOGY 36.3(2016):445-453. |
入库方式： OAI收割
来源：生态环境研究中心
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