Research progress in quantifying the mechanical properties of single living cells using atomic force microscopy  

作　　者：Mi Li Lianqing Liu Ning Xi Yuechao Wang 

机构地区：[1]State Key Laboratory of Robotics,Shenyang Institute of Automation,Chinese Academy of Sciences [2]University of Chinese Academy of Sciences [3]Department of Mechanical and Biomedical Engineering,City University of Hong Kong

出　　处：《Chinese Science Bulletin》2014年第31期4020-4029,共10页

基　　金：supported by the NationalNatural Science Foundation of China(61175103,61327014);CASFEA International Partnership Program for Creative Research Teams

摘　　要：The advent of atomic force microscopy(AFM)provides a powerful tool for investigating the behaviors of single living cells under near physiological conditions.Besides acquiring the images of cellular ultra-microstructures with nanometer resolution,the most remarkable advances are achieved on the use of AFM indenting technique to quantify the mechanical properties of single living cells.By indenting single living cells with AFM tip,we can obtain the mechanical properties of cells and monitor their dynamic changes during the biological processes(e.g.,after the stimulation of drugs).AFM indentation-based mechanical analysis of single cells provides a novel approach to characterize the behaviors of cells from the perspective of biomechanics,considerably complementing the traditional biological experimental methods.Now,AFM indentation technique has been widely used in the life sciences,yielding a large amount of novel information that is meaningful to our understanding of the underlying mechanisms that govern the cellular biological functions.Here,based on the authors’own researches on AFM measurement of cellular mechanical properties,the principle and method of AFM indentation technique was presented,the recent progress of measuring the cellular mechanical properties using AFM was summarized,and the challenges of AFM single-cell nanomechanical analysis were discussed.The advent of atomic force microscopy （AFM） provides a powerful tool for investigating the behaviors of single living cells under near physiological conditions. Besides acquiring the images of cellular ultra-microstruc- tures with nanometer resolution, the most remarkable advances are achieved on the use of AFM indenting tech- nique to quantify the mechanical properties of single living ceils. By indenting single living cells with AFM tip, we can obtain the mechanical properties of cells and monitor their dynamic changes during the biological processes （e.g., after the stimulation of drugs）. AFM indentation-based mechan- ical analysis of single cells provides a novel approach to characterize the behaviors of cells from the perspective of biomechanics, considerably complementing the traditional biological experimental methods. Now, AFM indentation technique has been widely used in the life sciences, yielding a large amount of novel information that is meaningful to our understanding of the underlying mechanisms that govern the cellular biological functions. Here, based on the authors＇ own researches on AFM measurement of cellular mechani- cal properties, the principle and method of AFM indentationtechnique was presented, the recent progress of measuring the cellular mechanical properties using AFM was summa- rized, and the challenges of AFM single-cell nanomechani- cal analysis were discussed.

关 键 词：单个活细胞 原子力显微镜 机械性能 AFM 生物过程 纳米分辨率 生物学功能 生理条件 

分 类 号：Q27[生物学—细胞生物学]