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题名:
Drug-Induced Changes of Topography and Elasticity in Living B Lymphoma Cells Based on Atomic Force Microscopy
其他题名: 基于AFM的药物刺激前后淋巴瘤活细胞的形貌及弹性的变化
作者: Li M(李密); Liu LQ(刘连庆); Xi N(席宁); Wang YC(王越超); Dong ZL(董再励); Xiao XB(肖秀斌); Zhang WJ(张伟京)
作者部门: 机器人学研究室
通讯作者: 刘连庆 ; 席宁 ; 张伟京
关键词: Atomic force microscopy ; Lymphoma ; Elasticity ; Force curve ; Youngʹs modulus
刊名: 物理化学学报
ISSN号: 1000-6818
出版日期: 2012
卷号: 28, 期号:6, 页码:1502-1508
收录类别: SCI ; CSCD
WOS记录号: WOS:000305035700031
产权排序: 1
摘要: 原子力显微镜(AFM)的发明为研究单个活细胞的形貌结构及物理特性提供了新的技术手段.然而,由于缺少合适的固定方法,利用AFM对动物悬浮活细胞的形貌进行高分辨率成像还面临着巨大的挑战.本文提出一种基于微柱阵列和静电吸附相结合的动物悬浮细胞固定方法.通过微柱阵列的机械钳制和多聚赖氨酸的静电吸附实现了对单个淋巴瘤B细胞的固定,并在此基础上利用AFM动态观测了不同浓度Rituximab刺激下淋巴瘤B细胞的表面形貌及弹性的变化.经过0.2 mg?mL-1的Rituximab刺激2 h后,细胞表面的褶皱增加,细胞的杨氏模量从196 kPa减小到183 kPa.经过0.5 mg?mL-1的Rituximab刺激2 h后,细胞形貌发生显著变化并出现突起结构,细胞的杨氏模量从234 kPa减小到175 kPa.实验结果表明淋巴瘤细胞形貌和弹性变化的幅度随着Rituximab刺激浓度的增加而增加,加深了对Rituximab作用效果的认识.
英文摘要: Atomic force microscopy(AFM) provides a means for characterizing the surface topography and biophysical properties of individual living cells under near-physiological conditions.However,owing to the lack of adequate cellular immobilization methods,AFM imaging of living,suspended mammalian cells is still a big challenge.In this paper,a method is presented for immobilizing individual living B lymphoma cells that combines mechanical trapping with pillar arrays and electrostatic adsorption with poly-L-lysine.In this way,the topography and elasticity changes of individual B lymphoma cells that were stimulated with different concentrations of Rituximab were observed and measured dynamically.When the cell is stimulated by 0.2 mg·mL-1Rituximab for 2 h,the cell topography becomes more corrugated and Young smodulus decreases from 196 to 183 kPa.When the cell is stimulated by 0.5 mg·mL-1Rituximab for 2 h,thecell topography changes more significantly and some tubercles appear,and Young s modulus decreasesfrom 234 to 175 kPa.These results thus provide a unique insight into the effects of Rituximab on individualcells. 
语种: 英语
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Chemistry, Physical
关键词[WOS]: FIBROBLASTS ; INHIBITION
研究领域[WOS]: Chemistry
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sia.cn/handle/173321/9989
Appears in Collections:机器人学研究室_期刊论文

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作者单位: 1.State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, P. R. China
2.Graduate University of Chinese Academy of Sciences, Beijing 100049, P. R. China
3.Department of Electrical and Computer Engineering, Michigan State University, East Lansing 48824, USA
4.Department of Lymphoma, Affiliated Hospital of Military Medical Academy of Sciences, Beijing 100071, P. R. China

Recommended Citation:
Li M,Liu LQ,Xi N,et al. Drug-Induced Changes of Topography and Elasticity in Living B Lymphoma Cells Based on Atomic Force Microscopy[J]. 物理化学学报,2012,28(6):1502-1508.
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