Investigation of the interactions between silver nanoparticles and Hela   cells by scanning electrochemical microscopy

doi:10.1039/b807057a

CORC > 北京大学 > 化学与分子工程学院

	Investigation of the interactions between silver nanoparticles and Hela cells by scanning electrochemical microscopy
	Chen, Zhong ; Xie, Shubao ; Shen, Li ; Du, Yu ; He, Shali ; Li, Qing ; Liang, Zhongwei ; Meng, Xin ; Li, Bo ; Xu, Xiaodong ; Ma, Hongwei ; Huang, Yanyi ; Shao, Yuanhua
刊名	analyst
	2008
关键词	NITRIC-OXIDE RELEASE HUMAN BREAST CELLS LIVING CELLS ENDOTHELIAL-CELLS ESCHERICHIA-COLI OXYGEN-CONSUMPTION ENZYME-ACTIVITY MODEL NEURONS SINGLE CELLS COMB POLYMER
DOI	10.1039/b807057a
英文摘要	The interactions between Hela cells and silver nanoparticles (AgNPs) have been studied by scanning electrochemical microscopy (SECM) with both IrCl(6)(2-/3-) and Fe(CN)(6)(3-/4-) as the dual mediators. IrCl(6)(2-), which can be produced in situ and react with AgNPs, is used as the mediator between the AgNPs on the cells and the SECM tip. Another redox couple, Fe(CN)(6)(3-/4-), which has a similar hydrophilicity to IrCl6(2-/3-), but cannot react with AgNPs, is also employed for the contrast experiments. The cell array is cultured successfully onto a Petri dish by microcontact printing (mu CP) technique, which can provide a basic platform for studying of single cells. The approach curve and line scan are the two methods of SECM employed here to study the Hela cells. The former can provide the information about the interaction between Hela cells and AgNPs whereas the later gives the cell imaging. The permeability of cell membranes and morphology are two main factors which have effects on the feedback mode signals when K(3)Fe(CN)(6) is used as the mediator. The permeability of the cell membranes can be ignored after interaction with high concentration of AgNP solution and the height of the Hela cells is slightly decreased in this process. The kinetic rate constants (k(0)) between IrCl(6)(2-) and Ag on the Hela cell can be evaluated using K(3)IrCl(6) as the mediator, and they are increased with the higher concentrations of the AgNP solutions. The k(0) is changed about 10 times from 0.43 +/- 0.04 x 10(-4) to 1.25 +/- 0.07 x 10(-4) and to 3.93 +/- 1.9 x 10(-4) cm s(-1) corresponding to 0, 1 and 5 mM of AgNO(3) solution. The experimental results demonstrate that the AgNPs can be adsorbed on the cell surface and detected by SECM. Thus, the amount of AgNPs adsorbed on cell membranes and the permeability or morphology changes can be investigated simultaneously using this approach. The dual mediator system and cell array fabricated by mu CP technique can provide better reproducibility because they can simplify experiments, and provide a platform for further single cell detection.; Chemistry, Analytical; SCI(E); PubMed; 17; ARTICLE; 9; 1221-1228; 133
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/150163]
专题	化学与分子工程学院工学院
推荐引用方式 GB/T 7714	Chen, Zhong,Xie, Shubao,Shen, Li,et al. Investigation of the interactions between silver nanoparticles and Hela cells by scanning electrochemical microscopy[J]. analyst,2008.
APA	Chen, Zhong.,Xie, Shubao.,Shen, Li.,Du, Yu.,He, Shali.,...&Shao, Yuanhua.(2008).Investigation of the interactions between silver nanoparticles and Hela cells by scanning electrochemical microscopy.analyst.
MLA	Chen, Zhong,et al."Investigation of the interactions between silver nanoparticles and Hela cells by scanning electrochemical microscopy".analyst (2008).