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Tissue Engineering: Construction of a Multicellular 3D Scaffold for the Delivery of Layered Cell Sheets
Published on: October 3, 2014
Cell sheet-based myocardial tissue engineering: new hope for damaged heart rescue
Tatsuya Shimizu1, Hidekazu Sekine, Masayuki Yamato
1Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, TWIns, Shinjuku-ku, Tokyo, Japan. tshimizu@abmes.twmu.ac.jp
Current Pharmaceutical Design
|August 20, 2009
Summary
Cell sheet-based tissue engineering offers a promising solution for severe heart failure, overcoming cell loss issues seen in direct injection therapies. This innovative approach creates functional, scaffold-free myocardial tissues for regenerative medicine.
Area of Science:
- Regenerative Medicine
- Biomedical Engineering
- Cardiovascular Research
Background:
- Severe heart failure necessitates advanced regenerative therapies beyond direct cell injection.
- Direct cell injection faces challenges like significant cell loss due to physical strain, hypoxia, and washout.
- Tissue-engineered myocardial patches represent a second-generation cell therapy approach.
Purpose of the Study:
- To develop and evaluate a novel cell sheet-based tissue engineering strategy for myocardial regeneration.
- To overcome the limitations of existing cell therapies for severe heart failure.
- To engineer functional, scaffold-free, three-dimensional myocardial tissues and organs.
Main Methods:
- Utilized temperature-responsive culture surfaces to harvest two-dimensional (2-D) cell sheets.
- Created three-dimensional (3-D) tissues by stacking harvested cell sheets without scaffolds.
- Engineered myocardial patches, functional myocardial tubes, and scaled up tissue thickness through multi-step transplantation.
Main Results:
- Cell sheet-based patches demonstrated improved damaged heart function in preclinical models (rat, canine, pig).
- Stacked cardiomyocyte sheets exhibited synchronized beating in vitro and in vivo, mimicking native heart tissue structure.
- Achieved approximately 1 mm-thick functional myocardial tissue through multi-step transplantation of cell sheets.
Conclusions:
- Cell sheet-based tissue engineering is a viable and effective strategy for myocardial regeneration.
- This technology shows significant potential for treating severe heart failure and improving patient outcomes.
- The developed methods enable the creation of complex, functional cardiac tissues for therapeutic applications.
