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Enhanced cell affinity and osteogenic differentiation of liquid crystal-based substrate via surface
Shenyu Yang1,2,3, Yiping Huang1,2, Peishan Jian1,2
1Department of Materials Science and Engineering, Jinan University, Guangzhou, China.
Journal of Biomedical Materials Research. Part A
|August 14, 2020
Summary
Researchers enhanced cell affinity and osteogenic differentiation using novel liquid crystalline substrates. The modified octyl hydroxypropyl cellulose ester (OPC) surfaces with polydopamine (PDOPA) and chitooligosaccharide (COS) mimic the extracellular matrix (ECM) for improved cell-substrate interactions.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Cell Biology
Background:
- Cell-substrate interactions are crucial for regulating cell behavior.
- Mimicking the native extracellular matrix (ECM) enhances cell-substrate contact and function.
- Developing bioactive surfaces is key for regenerative medicine applications.
Purpose of the Study:
- To improve surface bioactivity of liquid crystalline substrates for enhanced cell affinity and osteogenic differentiation.
- To create novel OPC-PDOPA-COSs substrates by immobilizing chitooligosaccharide (COS) onto polydopamine (PDOPA)-coated octyl hydroxypropyl cellulose ester (OPC).
Main Methods:
- Fabrication of OPC-PDOPA-COSs liquid crystalline substrates.
- Characterization of surface properties including hydrophilicity and elastic modulus.
- In vitro evaluation of rat bone marrow mesenchymal stem cells (rBMSCs) behavior, including attachment, proliferation, polarization, and osteogenic differentiation markers.
Main Results:
- PDOPA coating improved OPC surface hydrophilicity and elastic modulus, enhancing initial cell attachment.
- COS immobilization promoted rBMSC proliferation, polarization, and cytoskeleton formation.
- OPC-PDOPA-COSs substrates significantly increased alkaline phosphatase (ALP) activity, calcium deposition, and expression of bone-related genes (BMP-2, RUNx-2, COL-I, OCN).
Conclusions:
- Surface biofunctionalization of OPC-based liquid crystalline substrates creates a synergistic effect of surface chemistry and liquid crystalline properties.
- These modified substrates effectively simulate the in vivo ECM environment.
- The developed substrates provide a favorable platform for enhancing positive cell-substrate interactions and promoting osteogenic differentiation.
