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A Lab-On-A-Chip Platform for Stimulating Osteocyte Mechanotransduction and Analyzing Functional Outcomes of Bone Remodeling
Published on: May 21, 2020
Understanding osteoblast responses to stiff nanotopographies through experiments and computational simulations
Lei Yang1, Viswanath Chinthapenta, Qunyang Li
1School of Engineering, Brown University, Providence, Rhode Island 02912, USA.
Journal of Biomedical Materials Research. Part A
|April 28, 2011
Summary
Nanocrystalline diamond (NCD) surfaces enhance osteoblast functions more than submicron crystalline diamond (SMCD). Computational models and live cell imaging revealed that specific nanotopography dimensions can inhibit cell spreading, clarifying mechanisms of improved cell-material interactions.
Area of Science:
- Biomaterials Science
- Cell Biology
- Surface Engineering
Background:
- Nanotopographies are known to influence cell functions, but the underlying mechanisms at the cell-material interface remain unclear.
- Understanding these mechanisms is crucial for designing advanced biomaterials that promote desired cellular responses.
Purpose of the Study:
- To investigate the impact of different diamond nanotopographies on osteoblast (bone-forming cell) functions.
- To elucidate the mechanisms by which nanotopographies enhance cell adhesion, proliferation, and differentiation.
- To correlate surface feature dimensions with cellular responses using computational modeling and experimental validation.
Main Methods:
- Fabrication of diamond films with distinct nanotopographies: nanocrystalline diamond (NCD) and submicron crystalline diamond (SMCD).
- Assessment of osteoblast adhesion, proliferation, and differentiation on these surfaces over time.
- Computational simulations to model cell filopodia extension and spreading in response to nanotopography.
- Live cell imaging (LCI) experiments to validate simulation findings.
Main Results:
- Osteoblast responses (adhesion, proliferation, differentiation) were significantly greater on NCD compared to SMCD.
- Computational simulations indicated that larger lateral dimensions or increased height of nanometer surface features could inhibit filopodia extension and cell spreading.
- Live cell imaging experiments confirmed the simulation predictions regarding cell spreading.
Conclusions:
- The study demonstrates that nanocrystalline diamond surfaces promote superior osteoblast functions compared to submicron crystalline diamond.
- Specific nanotopography dimensions play a critical role in modulating cell spreading and filopodia extension.
- A combined approach of experimental testing and computational simulation offers a novel strategy for investigating nanotopography-enhanced cell functions.
