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中国临床药理学与治疗学 ›› 2009, Vol. 14 ›› Issue (10): 1115-1120.

• 基础研究 • 上一篇    下一篇

药用纳米SiO2 对人正常肺细胞的氧化损伤

李艾斯1, 黄永平1, 刘建文1, 蓝闽波2, 高峰3, 徐皓亮1, 陈明苍1, 徐春1   

  1. 1华东理工大学药学院药理实验室, 2分析测试中心, 3药学院药剂实验室, 上海 200237
  • 收稿日期:2009-03-30 修回日期:2009-10-14 发布日期:2020-10-29
  • 作者简介:李艾斯,女,硕士研究生,研究方向:分子药理学与毒理学。Tel:13585757048 E-mail:laisy77 @126.com
  • 基金资助:
    上海市科学技术委员会纳米科学专项研究(0752nm025)

Oxidative lesions induced by medical SiO2 nanoparticles on normal human lung cells

LI Ai-si1, HUANG Yong-ping1, LIU Jian-wen1, LAN Min-bo2, GAO Feng3, XU Hao-liang1, CHEN Ming-cang1, XU Yi-chun1   

  1. 1Laboratory of Pharmacology, 2Centre of Analysis and Test, 3Laboratory of Pharmaceutics, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
  • Received:2009-03-30 Revised:2009-10-14 Published:2020-10-29

摘要: 目的 探讨药用纳米SiO2 对人正常肺细胞MRC-5 的生长抑制与氧化损伤作用。方法 纳米SiO2 暴露于MRC-5 细胞48 h 后, 以MTT 法测定其对细胞增殖的影响, HE 染色观察细胞的形态学变化, 并检测暴露后细胞内活性氧(ROS) 和还原型谷胱甘肽(GSH) 含量以及超氧化物歧化酶(SOD) 活性的改变, 分析纳米材料对MRC-5 细胞的氧化损伤作用。结果 两种尺度(粒径21.6 、48.6 nm) 纳米SiO2 暴露浓度分别达到0.4 mg/mL与1.0 mg/mL 以上时, 细胞存活率随暴露剂量的增加而降低, IC50 分别为0.8 mg/mL 和1.9 mg/mL。细胞形态皱缩, 核质凝聚。细胞内活性氧明显升高(P <0.01), GSH 含量和SOD 活性显著降低(P <0.05), 且呈现明显的剂量效应关系。结论 较高浓度纳米SiO2 直接暴露可抑制人正常肺细胞MRC-5 的增殖, 其机理与细胞的氧化损伤有关。

关键词: 药用纳米材料SiO2, 细胞毒性, 氧化损伤

Abstract: AIM: To investigate the medical SiO2 nanoparticles induced cytotoxicity and its mechanism on normal human lung cells (MRC-5 cells) in vitro. METHODS: The MRC-5 cells were exposed with different concentrations of SiO2 nanoparticles for 48 h. The cell survival rate was tested by MTT assay and the cell morphological changes were observed with HE staining.The activities of reactive oxygen species (ROS), glutathione (GSH) and superoxide dismutase (SOD) were determined to evaluate the oxidative damage after SiO2 exposure. RESULTS: Exposure with high concentrations above 0.4 mg/mL and 1.0 mg/mL of 21.6 nm and 48.6 nm SiO2 nanoparticles decreased the cell survival rate in a dose-dependent manner.The median inhibitory concentrations (IC50) were 0.8 mg/mL and 1.9 mg/mL respectively.Morphological observation revealed cell shrinkage and nuclear condensation after exposure.The reduced GSH content as well as SOD activity were decreased in SiO2 nanoparticles exposed cells than that of control. CONCLUSION: Medical SiO2 nanoparticles exposure resultes in a dosedependent cytotoxicity in cultured MRC-5 cells that was associated with increased oxidative stress.

Key words: medical SiO2 nanoparticles, cytotoxicity, oxidative stress

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