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Impact of Collagen/Heparin Multilayers for Regulating Bone Cellular Functions
Ana M Ferreira1,2, Piergiorgio Gentile1, Sotiria Toumpaniari1
1Mechanical and Systems Engineering, Newcastle University , Newcastle upon Tyne, United Kingdom.
ACS Applied Materials & Interfaces
|October 30, 2016
Summary
This study demonstrates how layering type I collagen (coll) and heparin (hep) on poly(l-lactic acid) (PLLA) surfaces affects bone cell activity. The number of heparin layers influences collagen organization and mesenchymal stem cell responses for bone regeneration.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Cell Biology
Background:
- Bone cell interaction with the extracellular matrix (ECM) is crucial for bone regeneration.
- Engineering biomaterial surfaces requires understanding cell-ECM interactions.
Purpose of the Study:
- To evaluate the impact of type I collagen (coll) and heparin (hep) multilayer coatings on poly(l-lactic acid) (PLLA) substrates for bone regeneration.
- To investigate the effect of heparin on collagen hierarchical organization and subsequent osteoblast-like (MC3T3-E1) and human mesenchymal stem cell (hMSC) responses.
Main Methods:
- Layer-by-layer assembly of heparin/collagen films on PLLA substrates.
- Surface characterization using contact angle, infrared spectroscopy, and morphological analysis.
- Assessment of osteoblast-like and hMSC responses to the modified surfaces.
Main Results:
- Stable heparin/collagen multilayer films were achieved on PLLA after 10 bilayers.
- The number of deposited heparin layers influenced collagen self-assembly into fibrils.
- The biomacromolecular coating potentially impacted hMSC activity, with variations based on heparin layer count.
Conclusions:
- Heparin/collagen multilayer coatings offer a promising strategy for modifying PLLA surfaces in bone tissue engineering.
- The quantity of heparin in the coating plays a significant role in collagen organization and cellular response.
- This approach provides insights into optimizing biomaterial interfaces for enhanced bone regeneration.
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