Abstract
The physical properties of the extracellular matrix (ECM) are a key aspect of the cell microenvironment. A biological system is a highly dynamic organization. In our study, we designed and prepared a large area of magnetic PDMS elastomer micropillar array (mMPA) with robust and tunable movement for cell mechanics study. The rotational movement frequency of the micropillars could be precisely controlled by a home-built magnetic actuation apparatus. Cells cultured in the mMPA could be suspended in between two micropillars in a single level and exhibited a 3D structure. With the rotational movement of the micropillar, a homogeneous stretchable force could be applied to a single cell along it long axis with various frequencies. We exclusively studied the influence of dynamic properties of the micropillar movement on cell behaviors. We found that, by fixing the amplitude of the stretchable force, the frequency-based properties of the cell microenvironment could significantly change cell functions. The cell behaviors are dependent on the micropillar movement frequency and a transition from proliferation to apoptosis/death exhibited with the increment of the force application frequency.
Original language | English (US) |
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Pages (from-to) | 65-72 |
Number of pages | 8 |
Journal | ACS Biomaterials Science & Engineering |
Volume | 2 |
Issue number | 1 |
DOIs | |
State | Published - Dec 8 2015 |
Externally published | Yes |
Bibliographical note
KAUST Repository Item: Exported on 2021-04-02Acknowledged KAUST grant number(s): SA-C0040/UK-C0016
Acknowledgements: We are grateful for the kind help from Kelvin S. K. Cheung and Ching Walter Lee in DMSF for the design and fabrication of the magnetic actuation apparatus. We thank Miss Jingxuan Tian for the 3D schematic diagram drawing. This research is supported by Award No. SA-C0040/UK-C0016, made by King Abdullah University of Science and Technology (KAUST) and Hong Kong RGC Grants HKUST 604710 and 605411 and Ministry of Agriculture of the People's Republic of China (no. 201303045). The work is also partially supported by the
Environmental Science Program (ENVS) at HKUST.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.