Amplification of nuclear deformation of breast cancer cells by seeding on micropattemed surfaces to better distinguish their malignancies

Date

2019-11-01

Author

Antmen Altunsoy, Ezgi
Demirci, Utkan
Hasırcı, Vasıf Nejat

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Information about the mechanical properties of cancer cells leads to new insights about their malignancy levels. The more flexible the cancer cells and their nuclei are, the more aggressive and invasive they are. Flexibility is a result of composition and properties of molecular constituents of cells and its extent is expressed by deformation. Differences in the mechanical properties could be modulated by topography and chemistry of the substrate. In this study, the main hypothesis is that the difference in the mechanical properties of malignant and benign breast cancer cells could be used as a discriminator of these cells and reflected by the extent of nuclear deformation on micropattemed substrates. We compared benign (MCF10A), malignantnoninvasive (MCF7), and malignant highly invasive (MDAMB231) breast cancer cell lines using their nuclear deformability on micropattemed surfaces designed with square prism-shaped micropillars of poly(methyl methacrylate) (PMMA) (8 mu m high, 4 x 4 mu m(2) area, 4 mu m gap). Several shape descriptors (circularity, solidity, roundness, aspect ratio) were used to analyze nuclear deformation. We were able to discriminate the three cells when the descriptor circularity and hydrophobic micropattemed surfaces were used. The cells showed nuclear deformability in the order following the extent of their malignancies. The most aggressive cell, MDAMB231, had the lowest circularity value, 0.37, whereas the noninvasive malignant, MCF7, and benign, MCF10A, cells had higher values 0.47 and 0.77, respectively. Mechanism of the deformation was shown at the molecular level that the expression of Lamin A/C and Nesprin-2 genes decreased with increased nuclear deformation. In summary, biomechanical properties of cells can provide useful information about their cancer state and they can be reflected in the biological markers.

Subject Keywords

Cell biomechanics, Nuclear circularity, Nucleus deformation, Micropattern, Breast cancer

URI

https://hdl.handle.net/11511/31197

Journal

COLLOIDS AND SURFACES B-BIOINTERFACES

DOI

https://doi.org/10.1016/j.colsurfb.2019.110402

Collections

Graduate School of Natural and Applied Sciences, Article

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Citation Formats

E. Antmen Altunsoy, U. Demirci, and V. N. Hasırcı, “Amplification of nuclear deformation of breast cancer cells by seeding on micropattemed surfaces to better distinguish their malignancies,” COLLOIDS AND SURFACES B-BIOINTERFACES, pp. 0–0, 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/31197.