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Proceedings Paper

Elasticity measurement of breast cancer cells by atomic force microscopy
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Paper Abstract

Mechanical properties of living cells play an important role in understanding various cells’ function and state. Therefore cell biomechanics is expected to become a useful tool for cancer diagnosis. In this study, atomic force microscopy (AFM) using a square pyramid probe was performed to investigate cancerous (MCF-7) and benign (MCF-10A) human breast epithelial cells. The new QITM mode was used to acquire high-resolution topographic images and elasticity of living cells. Furthermore, individual force curves were recorded at maximum loads of 0.2, 0.5 and 1 nN, and the dependence of cell’s elasticity with loading force was discussed. It was showed that the cancerous cells exhibited smaller elasticity modulus in comparison to non-cancerous counterparts. The elasticity modulus increased as the loading force increased from 0.2 nN to 1 nN. This observation indicates that loading force affects the cell’s apparent elasticity and it is important to choose the appropriate force applied to cells in order to distinguish normal and cancer cells. The results reveal that the mechanical properties of living cells measured by atomic force microscopy may be a useful indicator of cell type and disease.

Paper Details

Date Published: 17 September 2014
PDF: 6 pages
Proc. SPIE 9230, Twelfth International Conference on Photonics and Imaging in Biology and Medicine (PIBM 2014), 92300Y (17 September 2014); doi: 10.1117/12.2069116
Show Author Affiliations
Chaoxian Xu, Fujian Normal Univ. (China)
Yuhua Wang, Fujian Normal Univ. (China)
Ningcheng Jiang, Fujian Normal Univ. (China)
Hongqin Yang, Fujian Normal Univ. (China)
Juqiang Lin, Fujian Normal Univ. (China)
Shusen Xie, Fujian Normal Univ. (China)

Published in SPIE Proceedings Vol. 9230:
Twelfth International Conference on Photonics and Imaging in Biology and Medicine (PIBM 2014)
Qingming Luo; Lihong V. Wang; Valery V. Tuchin, Editor(s)

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