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Constructing a highly bioactive tendon-regenerative scaffold by surface modification of tissue-specific stem
Liang-Ju Ning1, Jing Cui1, Shu-Kun He1,2
1Laboratory of Stem Cell and Tissue Engineering, Orthopedic Research Institute, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, Chengdu, Sichuan 610041, P.R. China.
Regenerative Biomaterials
|April 28, 2022
Summary
Surface modification of decellularized tendon slices (DTSs) with tendon-specific extracellular matrix (tECM) significantly enhanced stem cell behavior. This novel tECM-DTS scaffold shows promise for in situ tendon regeneration.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Regenerative Medicine
Background:
- Developing bioactive scaffolds is crucial for tissue engineering and regenerative medicine.
- Decellularized tendon slices (DTSs) show potential for promoting stem cell proliferation and tenogenic differentiation.
- Further enhancement of DTS bioactivity is needed for improved tendon regeneration.
Purpose of the Study:
- To improve the bioactivity of DTS scaffolds by surface modification with tendon-specific extracellular matrix (tECM).
- To create a novel, highly bioactive scaffold for tendon regeneration.
- To investigate the effect of tECM modification on stem cell behavior and tenogenic differentiation.
Main Methods:
- Surface modification of DTSs with tECM.
- Analysis of surface topographical cues and stiffness.
- Quantification of extracellular matrix components.
- Assessment of stem cell migration, proliferation, and tenogenic differentiation *in vitro*.
Main Results:
- tECM modification altered the aligned surface topography of DTSs while retaining surface stiffness.
- The tECM-DTS scaffolds showed a significant increase in multiple ECM components.
- tECM-DTSs dramatically enhanced stem cell migration, proliferation, and tenogenic differentiation compared to unmodified DTSs.
Conclusions:
- Surface modification of DTSs with tECM is a viable strategy to create highly bioactive scaffolds.
- The enhanced bioactivity of tECM-DTSs promotes key stem cell behaviors essential for tendon regeneration.
- This approach offers a new avenue for developing advanced ECM-based biomaterials for *in situ* tendon repair.
