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Capillary Force Lithography for Cardiac Tissue Engineering
Published on: June 10, 2014
Enabling microscale and nanoscale approaches for bioengineered cardiac tissue.
Vincent Chan1, Ritu Raman, Caroline Cvetkovic
1Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States.
ACS Nano
|March 27, 2013
Summary
Adding carbon nanotubes (CNT) to gelatin methacrylate (GelMA) significantly enhances bioengineered cardiac tissue. This hybrid material improves electrical and mechanical properties, cell health, and drug resistance for cardiac applications.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Cardiovascular Research
Background:
- Cardiac tissue engineering aims to create functional cardiac muscle for therapeutic and research applications.
- Current bioengineered cardiac tissues face challenges in achieving optimal electrophysiological and mechanical properties.
- Gelatin methacrylate (GelMA) is a promising hydrogel for tissue engineering but requires functional enhancement.
Purpose of the Study:
- To investigate the impact of incorporating carbon nanotubes (CNT) into GelMA hydrogels for cardiac tissue engineering.
- To evaluate the effects of CNT-GelMA hybrid materials on the functionality of bioengineered cardiac tissue.
- To explore the potential of these enhanced tissues in drug testing and regenerative medicine.
Main Methods:
- Fabrication of hybrid hydrogels using gelatin methacrylate (GelMA) and varying concentrations of carbon nanotubes (CNT).
- Characterization of the hybrid materials' mechanical and electrophysiological properties.
- Assessment of cell behavior, including adhesion, viability, organization, and beating rate, within the CNT-GelMA constructs.
- Evaluation of the engineered cardiac tissue's response to cardio-inhibitory and cardio-toxic drugs.
Main Results:
- CNT-GelMA hybrid materials exhibited significantly improved electrophysiological performance compared to GelMA alone.
- Enhanced mechanical integrity, cell adhesion, viability, uniformity, and organization were observed in CNT-GelMA tissues.
- Increased beating rate and a lowered excitation threshold were measured in the engineered cardiac tissues.
- The CNT-GelMA constructs demonstrated protective effects against cardio-inhibitory and cardio-toxic drugs.
Conclusions:
- The incorporation of CNT into GelMA hydrogels represents a viable strategy to enhance bioengineered cardiac tissue functionality.
- These improved hybrid materials hold promise for applications in "heart-on-a-chip" devices, bioactuators, and future cardiac therapies.
- Further development of CNT-GelMA based cardiac tissues could advance drug safety testing and regenerative medicine for heart disease.
