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Choi J, Bastatas L, Lee E, Mutiso KT, Park S. Mechanical characterization of multi-layered lipid nanoparticles using high-resolution AFM force spectroscopy. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.06.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Shan Y, Wang H. The structure and function of cell membranes examined by atomic force microscopy and single-molecule force spectroscopy. Chem Soc Rev 2016; 44:3617-38. [PMID: 25893228 DOI: 10.1039/c4cs00508b] [Citation(s) in RCA: 102] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The cell membrane is one of the most complicated biological complexes, and long-term fierce debates regarding the cell membrane persist because of technical hurdles. With the rapid development of nanotechnology and single-molecule techniques, our understanding of cell membranes has substantially increased. Atomic force microscopy (AFM) has provided several unprecedented advances (e.g., high resolution, three-dimensional and in situ measurements) in the study of cell membranes and has been used to systematically dissect the membrane structure in situ from both sides of membranes; as a result, novel models of cell membranes have recently been proposed. This review summarizes the new progress regarding membrane structure using in situ AFM and single-molecule force spectroscopy (SMFS), which may shed light on the study of the structure and functions of cell membranes.
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Affiliation(s)
- Yuping Shan
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China.
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Single-molecule-force spectroscopy study of the mechanism of interactions between TSP-1 and CD47. Sci China Chem 2014. [DOI: 10.1007/s11426-014-5232-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Pan Y, Wang F, Liu Y, Jiang J, Yang YG, Wang H. Studying the mechanism of CD47-SIRPα interactions on red blood cells by single molecule force spectroscopy. NANOSCALE 2014; 6:9951-9954. [PMID: 25058630 DOI: 10.1039/c4nr02889a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The interaction forces and binding kinetics between SIRPα and CD47 were investigated by single-molecule force spectroscopy (SMFS) on both fresh and experimentally aged human red blood cells (hRBCs). We found that CD47 experienced a conformation change after oxidation, which influenced the interaction force and the position of the energy barrier between SIRPα and CD47. Our results are significant for understanding the mechanism of phagocytosis of red blood cells at the single molecule level.
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Affiliation(s)
- Yangang Pan
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P.R. China.
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CHANG CHENGTAO, LIN CHOUCHINGK, JU MINGSHAUNG. MORPHOLOGY AND ULTRASTRUCTURE-RELATED LOCAL MECHANICAL PROPERTIES OF PC-12 CELLS STUDIED BY INTEGRATING ATOMIC FORCE MICROSCOPY AND IMMUNOFLUORESCENCE IMAGING. J MECH MED BIOL 2012. [DOI: 10.1142/s0219519412500327] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A cost-effective method that integrates high-resolution morphology using an atomic force microscope and immunofluorescence imaging for measuring the local mechanical properties of a cell was developed. By considering the normal indentation conditions and the distribution of the underlying cytoskeleton, a criterion for selecting indentation sites was proposed. PC-12 cells cultivated under normal and high D-glucose medium are employed to demonstrate the applicability of the proposed method. The apparent Young's modulus for each indentation site was estimated by fitting the data with a pyramidal punch contact mechanics model. The results showed that the cell bodies cultivated in the high D-glucose medium were higher but their growth cones were shorter than those cultivated in a normal medium. The Young's moduli of the growth cones were positively correlated with the density of the actin filament in the cytoskeleton. The Young's moduli at the growth cone and the nucleus region of cells cultivated in the high D-glucose medium were higher and lower, respectively, than those of the control group. The results demonstrated the integrated method could correlate local mechanical properties and distribution of actin filament of the growth cone of PC-12 cell.
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Affiliation(s)
- CHENG-TAO CHANG
- Department of Mechanical Engineering, National Cheng Kung University, 1 University Road, Tainan 701, Taiwan
| | - CHOU-CHING K. LIN
- Department of Neurology, University Hospital, National Cheng Kung University, 1 University Road, Tainan 701, Taiwan
| | - MING SHAUNG JU
- Department of Mechanical Engineering, National Cheng Kung University, 1 University Road, Tainan 701, Taiwan
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Eslami S, Zareian R, Jalili N. Integrated automated nanomanipulation and real-time cellular surface imaging for mechanical properties characterization. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2012; 83:105002. [PMID: 23126795 DOI: 10.1063/1.4757115] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Surface microscopy of individual biological cells is essential for determining the patterns of cell migration to study the tumor formation or metastasis. This paper presents a correlated and effective theoretical and experimental technique to automatically address the biophysical and mechanical properties and acquire live images of biological cells which are of interest in studying cancer. In the theoretical part, a distributed-parameters model as the comprehensive representation of the microcantilever is presented along with a model of the contact force as a function of the indentation depth and mechanical properties of the biological sample. Analysis of the transfer function of the whole system in the frequency domain is carried out to characterize the stiffness and damping coefficients of the sample. In the experimental section, unlike the conventional atomic force microscope techniques basically using the laser for determining the deflection of microcantilever's tip, a piezoresistive microcantilever serving as a force sensor is implemented to produce the appropriate voltage and measure the deflection of the microcantilever. A micromanipulator robotic system is integrated with the MATLAB(®) and programmed in such a way to automatically control the microcantilever mounted on the tip of the micromanipulator to achieve the topography of biological samples including the human corneal cells. For this purpose, the human primary corneal fibroblasts are extracted and adhered on a sterilized culture dish and prepared to attain their topographical image. The proposed methodology herein allows an approach to obtain 2D quality images of cells being comparatively cost effective and extendable to obtain 3D images of individual cells. The characterized mechanical properties of the human corneal cell are furthermore established by comparing and validating the phase shift of the theoretical and experimental results of the frequency response.
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Affiliation(s)
- Sohrab Eslami
- Engineering Research Center for Computer Integrated Surgical Systems and Technology, Johns Hopkins University, Baltimore, Maryland 21218, USA.
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Shan Y, Huang J, Tan J, Gao G, Liu S, Wang H, Chen Y. The study of single anticancer peptides interacting with HeLa cell membranes by single molecule force spectroscopy. NANOSCALE 2012; 4:1283-1286. [PMID: 22215262 DOI: 10.1039/c2nr11541g] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
To determine the effects of biophysical parameters (e.g. charge, hydrophobicity, helicity) of peptides on the mechanism of anticancer activity, we applied a single molecule technique-force spectroscopy based on atomic force microscope (AFM)-to study the interaction force at the single molecule level. The activity of the peptide and analogs against HeLa cells exhibited a strong correlation with the hydrophobicity of peptides. Our results indicated that the action mode between α-helical peptides and cancer cells was largely hydrophobicity-dependent.
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Affiliation(s)
- Yuping Shan
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, PR China
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Osiro D, Filho RB, Assis OBG, Jorge LADC, Colnago LA. Measuring bacterial cells size with AFM. Braz J Microbiol 2012; 43:341-7. [PMID: 24031837 PMCID: PMC3768968 DOI: 10.1590/s1517-838220120001000040] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2010] [Indexed: 11/22/2022] Open
Abstract
Atomic Force Microscopy (AFM) can be used to obtain high-resolution topographical images of bacteria revealing surface details and cell integrity. During scanning however, the interactions between the AFM probe and the membrane results in distortion of the images. Such distortions or artifacts are the result of geometrical effects related to bacterial cell height, specimen curvature and the AFM probe geometry. The most common artifact in imaging is surface broadening, what can lead to errors in bacterial sizing. Several methods of correction have been proposed to compensate for these artifacts and in this study we describe a simple geometric model for the interaction between the tip (a pyramidal shaped AFM probe) and the bacterium (Escherichia coli JM-109 strain) to minimize the enlarging effect. Approaches to bacteria immobilization and examples of AFM images analysis are also described.
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Affiliation(s)
- Denise Osiro
- Centre Universitârio da Fundaçâo Educacional Guaxupé , Guaxupé, MG , Brasil
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Shan Y, Ma S, Nie L, Shang X, Hao X, Tang Z, Wang H. Size-dependent endocytosis of single gold nanoparticles. Chem Commun (Camb) 2011; 47:8091-3. [PMID: 21687845 DOI: 10.1039/c1cc11453k] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein we investigate the size-dependent force of endocytosing single gold nanoparticles by HeLa cells. The results reveal that both the uptake and unbinding force values are dependent upon the size of gold nanoparticles.
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Affiliation(s)
- Yuping Shan
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, PR China
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Shan Y, Hao X, Shang X, Cai M, Jiang J, Tang Z, Wang H. Recording force events of single quantum-dot endocytosis. Chem Commun (Camb) 2011; 47:3377-9. [DOI: 10.1039/c1cc00040c] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Atomic force microscopy of microvillous cell surface dynamics at fixed and living alveolar type II cells. Anal Bioanal Chem 2010; 399:2369-78. [DOI: 10.1007/s00216-010-4407-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2010] [Revised: 10/11/2010] [Accepted: 11/02/2010] [Indexed: 10/18/2022]
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Zhang Y, Hu X, Sun J, Shen Y, Hu J, Xu X, Shao Z. High-resolution imaging and nano-manipulation of biological structures on surface. Microsc Res Tech 2010; 74:614-26. [DOI: 10.1002/jemt.20925] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2010] [Accepted: 07/21/2010] [Indexed: 11/11/2022]
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High spatial resolution surface imaging and analysis of fungal cells using SEM and AFM. Micron 2008; 39:349-61. [DOI: 10.1016/j.micron.2007.10.023] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2007] [Revised: 10/17/2007] [Accepted: 10/18/2007] [Indexed: 11/22/2022]
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Sirghi L, Ponti J, Broggi F, Rossi F. Probing elasticity and adhesion of live cells by atomic force microscopy indentation. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2008; 37:935-45. [DOI: 10.1007/s00249-008-0311-2] [Citation(s) in RCA: 84] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2008] [Accepted: 03/10/2008] [Indexed: 01/30/2023]
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