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Engineering Biological-Based Vascular Grafts Using a Pulsatile Bioreactor
Published on: June 14, 2011
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Facile engineering of interactive double network hydrogels for heart valve regeneration
Jinsheng Li1,2, Weihua Qiao1, Yuqi Liu1
1Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan, China.
Nature Communications
|August 28, 2024
Summary
This study presents a new method for regenerative heart valves using TCDI chemistry. The engineered materials release H2S, promoting tissue regeneration and overcoming limitations of current prostheses.
Area of Science:
- Biomaterials Engineering
- Regenerative Medicine
- Cardiovascular Research
Background:
- Valvular heart disease necessitates advanced regenerative heart valve prostheses.
- Current prostheses often lack adaptability to tissue remodeling and have limited translational potential due to complex designs.
- There is a need for interactive materials that can modulate the immune microenvironment and support tissue regeneration.
Purpose of the Study:
- To develop a facile method for engineering interactive materials for heart valve regeneration using 1,1'-thiocarbonyldiimidazole (TCDI) chemistry.
- To investigate the ability of TCDI-crosslinked hydrogels to release hydrogen sulfide (H2S) and modulate immune responses.
- To evaluate the performance of engineered decellularized heart valves (DHVs) in terms of anti-calcification, anti-thrombosis, and regenerative capacity.
Main Methods:
- Utilized 1,1'-thiocarbonyldiimidazole (TCDI) chemistry to create cleavable thiourea and thiocarbamate linkages in hydrogels.
- Formed a double network hydrogel on decellularized heart valves (DHVs).
- Assessed material properties including H2S release during degradation, anti-calcification, anti-thrombosis after fatigue testing, and in vivo regenerative capacity post-implantation.
Main Results:
- TCDI crosslinking enabled gradual H2S release during degradation, regulating the immune microenvironment and accelerating tissue remodeling.
- Engineered DHVs demonstrated robust anti-calcification and anti-thrombosis properties even after fatigue testing.
- Post-implantation, DHVs exhibited adaptive degradation, supporting recellularization and H2S release, leading to comprehensive endothelial cell coverage and significant extracellular matrix remodeling.
Conclusions:
- This accessible TCDI-based strategy engineers interactive biomaterials for heart valve regeneration.
- The approach effectively overcomes limitations associated with traditional bioprosthetic valves by promoting immune modulation and tissue integration.
- The developed regenerative heart valve shows significant promise for clinical translation in treating valvular heart disease.
