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Updated: May 3, 2026
Capillary Force Lithography for Cardiac Tissue Engineering
Published on: June 10, 2014
Less is more: new biomimetic approach to control spatial and temporal cell loading for tissue engineering
Dan Deng1, Wei Liu, Umber Cheema
1Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, People's Republic of China; Department of Dermatological Surgery, Shanghai Xinhua Hospital, Shanghai Jiaotong University School of Medicine, 1665 Kongjiang Rd, Shanghai, 200092, People's Republic of China.
Stiff biodegradable polymers hinder tissue regeneration by stress shielding cells. A novel hybrid scaffold with temporary polyglycolic acid (PGA) fibers promotes cell-dependent matrix formation and enhances connective tissue stiffness.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Regenerative Medicine
Background:
- Stiff biodegradable polymers in connective tissue engineering can impair cell function due to stress shielding.
- This creates a challenge balancing initial mechanical support with long-term cell-driven matrix production.
Purpose of the Study:
- To test the "less is more" (LiM) hypothesis: reduced stress shielding leads to enhanced cell-dependent tissue formation.
- To develop a hybrid scaffold enabling gradual load transfer to embedded cells.
Main Methods:
- Designed a hybrid scaffold segregating cells in a collagen gel, with external mechanical loading supported by temporary polyglycolic acid (PGA) fibers.
- Monitored scaffold stiffness changes and cell behavior in vitro and in vivo over 14 days.
Main Results:
- PGA fibers gradually fractured and fragmented via hydrolysis, reducing construct stiffness over 14 days.
- In vivo studies showed similar degradation and stiffness reduction, with enhanced cell-dependent connective tissue stiffness.
Conclusions:
- The hybrid scaffold successfully demonstrated spatiotemporal load transfer, supporting the LiM hypothesis.
- This approach offers a customizable tool for biomimetic connective tissue engineering, improving cell-driven matrix synthesis.
