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Discrimination Between Cervical Cancer Cells and Normal Cervical Cells Based on Longitudinal Elasticity Using Atomic
Xueqin Zhao1, Yunxin Zhong2, Ting Ye3
1College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou, 310018, People's Republic of China. zhaoxueqin2004@163.com.
Nanoscale Research Letters
|December 16, 2015
Summary
Cell mechanical properties, measured by atomic force microscopy (AFM), can detect cancer. This study quantifies longitudinal elasticity differences between cancerous (CaSki) and normal (CRL2614) cervical cells, revealing distinct structural and elastic properties.
Area of Science:
- Biophysics
- Cell Biology
- Cancer Research
Background:
- Cell mechanical properties are emerging as crucial biomarkers for early cancer diagnosis.
- Atomic force microscopy (AFM) nanoindentation is a key technology for assessing cell cortex mechanics and differentiating malignant from normal cells.
- Quantifying non-homogeneous longitudinal elasticity in cellular structures remains an underexplored area in biomechanical studies.
Purpose of the Study:
- To investigate and quantify the differences in longitudinal elasticity between human cervical squamous carcinoma cells (CaSki) and normal cervical epithelial cells (CRL2614).
- To characterize the heterogeneous layered structure and elastic properties of these cell types using AFM.
- To explore the potential of AFM-based nanoindentation for improved cancer detection.
Main Methods:
- Application of a modified Carl and Schillers method using AFM nanoindentation.
- Investigation of longitudinal elasticity in CaSki and CRL2614 cells.
- Analysis of cell stiffness, nuclei zone elasticity, and cytoskeletal distribution at varying depths.
Main Results:
- Identification of a three-layer heterogeneous structure in the probing volume of both cell types.
- CaSki cells demonstrated lower whole-cell stiffness and a softer nuclei zone compared to CRL2614 cells.
- Normal CRL2614 cells exhibited a more differentiated cytoskeleton in the inner cytoplasm/nuclei zone, while CaSki cells showed deeper cytoskeletal distribution.
Conclusions:
- The study successfully quantified heterogeneous longitudinal elasticity in cancer cells, correlating elasticity with depth.
- Distinct biomechanical signatures were identified between cancerous and normal cervical cells, with specific elastic moduli and depths reported for each.
- The developed AFM-based method shows potential for enhancing cancer detection and providing insights into cancer pathophysiology.
