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Published on: February 3, 2018
Substrate stiffness affects skeletal myoblast differentiation in vitro
Sara Romanazzo1, Giancarlo Forte2, Mitsuhiro Ebara2
1Cell-Materials Interaction Group, Biomaterials Unit, International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba, Japan; Graduate School of Advanced Science and Engineering, Waseda University, Tokyo, Japan.
Scaffold stiffness impacts stem cell differentiation for cardiac tissue engineering. Softer scaffolds and muscle-specific feeder layers enhance myogenic differentiation and maturation.
Area of Science:
- Biomaterials Science
- Stem Cell Biology
- Tissue Engineering
Background:
- Optimizing cardiac muscle constructs requires scaffolds mimicking native muscle microenvironments.
- Scaffold mechanical properties are crucial for stem/progenitor cell function and cardiac contractility.
Purpose of the Study:
- To evaluate the impact of substrate stiffness on myoblast adhesion, proliferation, and differentiation.
- To determine the contribution of biological and mechanical cues to skeletal muscle progenitor differentiation.
Main Methods:
- Cross-linked poly-ε-caprolactone membranes with controlled stiffness were used.
- Two sources of myoblasts were cultured on substrates of varying stiffness.
- Muscle-specific and non-related feeder layers were applied to stiff surfaces.
Main Results:
- Substrate stiffness significantly affects myogenic differentiation, with softer substrates promoting differentiation.
- A muscle-specific feeder layer enhanced the maturation of skeletal muscle stem cells.
Conclusions:
- Tailoring scaffold stiffness is critical for effective cardiac tissue engineering.
- Combining appropriate mechanical cues with specific biological signals can optimize stem cell differentiation and construct development.
