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Simultaneous Electrical and Mechanical Stimulation to Enhance Cells' Cardiomyogenic Potential
Published on: January 18, 2019
Channelled scaffolds for engineering myocardium with mechanical stimulation
Ting Zhang1, Leo Q Wan2, Zhuo Xiong1
1Department of Mechanical Engineering, Tsinghua University & Key Laboratory for Advanced Materials Processing Technology, Ministry of Education of China, Beijing, China.
Journal of Tissue Engineering and Regenerative Medicine
|November 15, 2011
Summary
Engineered chitosan-collagen scaffolds with channels support cardiac tissue growth. Mechanical stimulation promotes cell connections and synchronous contraction in engineered heart muscle.
Area of Science:
- Biomaterials Engineering
- Tissue Engineering
- Cardiovascular Research
Background:
- Engineering functional myocardial tissue requires mimicking native heart matrix properties and culture environment.
- Scaffold composition, structure, and mechanical properties are crucial for cardiac tissue development.
- External factors like pulsatile perfusion and physical stimulation influence engineered heart tissue.
Purpose of the Study:
- To develop chitosan-collagen scaffolds with specific structural features for cardiac tissue engineering.
- To investigate the impact of mechanical stimulation on cell behavior and construct development.
- To create a biomimetic environment for generating contractile myocardial tissue.
Main Methods:
- Fabrication of chitosan-collagen scaffolds with micropores and parallel channels (~200 µm diameter).
- Seeding scaffolds with neonatal rat heart cells and culturing in a custom bioreactor.
- Application of dynamic tensile stretch for mechanical stimulation.
Main Results:
- Scaffolds exhibited structural and mechanical properties similar to native heart matrix.
- Channels facilitated oxygen transport and cell-cell connections within the construct.
- Engineered myocardial patches showed synchronous contraction after 3 days; mechanical stimulation promoted cell alignment, elongation, and connexin-43 expression.
Conclusions:
- Scaffold design, including micropores and channels, is vital for cardiac tissue engineering.
- Mechanical stimulation significantly enhances the development of contractile cardiac constructs.
- This approach holds promise for creating functional myocardial tissue grafts.
