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Surface modulation of complex stiffness via layer-by-layer assembly as a facile strategy for selective cell adhesion
1Department of Polymer Science and Engineering Key Laboratory of Macromolecule Synthesis and Functionalization of the Ministry of Education, Zhejiang University, 310027, Hangzhou, P.R. China. renkf@zju.edu.cn jijian@zju.edu.cn.
Biomaterials Science
|July 29, 2015
Summary
This study enhances endothelial cell (EC) competitiveness over smooth muscle cells (SMCs) by controlling surface stiffness using layer-by-layer assembly. This approach offers a new strategy for developing cardiovascular biomaterials to prevent restenosis and thrombosis.
Area of Science:
- Biomaterials Science
- Cardiovascular Engineering
- Cell Biology
Background:
- In-stent restenosis and thrombosis are critical complications following percutaneous vascular intervention.
- The balance between endothelial cells (ECs) and smooth muscle cells (SMCs) is crucial in these post-intervention pathologies.
- Current methods using bioactive molecules to promote EC adhesion have practical and industrial limitations.
Purpose of the Study:
- To develop a novel approach for enhancing EC competitiveness over SMCs.
- To achieve selective EC adhesion by modulating surface stiffness.
- To explore new avenues for designing advanced cardiovascular biomaterials.
Main Methods:
- Utilized layer-by-layer (LbL) assembly to create multilayer films with tunable complex surface stiffness.
- Coordinated multilayer film thickness with a rigid substrate to achieve desired stiffness.
- Investigated the effect of modulated surface stiffness on selective EC and SMC adhesion.
Main Results:
- Demonstrated that modulated complex surface stiffness promotes selective EC adhesion over SMCs.
- The differential adhesion is linked to variations in surface stiffness and intrinsic cell properties.
- The LbL assembly technique provides a facile and broadly applicable method.
Conclusions:
- The developed approach effectively enhances EC competitiveness, crucial for mitigating restenosis and thrombosis.
- This method offers a promising strategy for creating cell-based functional biomaterials for cardiovascular applications.
- Modulating surface stiffness via LbL assembly presents a viable alternative to traditional bioactive molecule strategies.
