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Updated: Feb 11, 2026
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Bridging the Bio-Electronic Interface with Biofabrication
Published on: June 6, 2012
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Bio-resin for high resolution lithography-based biofabrication of complex cell-laden constructs
Khoon S Lim1, Riccardo Levato2, Pedro F Costa2
1Christchurch Regenerative Medicine and Tissue Engineering (CReaTE) Group, Department of Orthopaedic Surgery and Musculoskeletal Medicine, University of Otago Christchurch, Christchurch 8011, New Zealand.
Biofabrication
|April 26, 2018
Summary
Researchers developed a novel bio-resin for 3D bioprinting using digital light processing (DLP). This new material supports high-resolution tissue fabrication and promotes long-term cell viability for tissue engineering applications.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- 3D Bioprinting
- Regenerative Medicine
Background:
- Lithography-based 3D bioprinting offers superior spatial resolution compared to extrusion methods, enabling complex tissue mimicry.
- Digital Light Processing (DLP) bioprinting facilitates the creation of intricate free-form and patterned structures.
- A gap exists in cyto-compatible bio-resins for lithography-based bioprinting, hindering technological advancement.
Purpose of the Study:
- To develop a novel, cyto-compatible bio-resin for lithography-based 3D bioprinting.
- To evaluate the bio-resin's capacity for high-resolution feature fabrication.
- To assess long-term cell viability, functionality, and tissue synthesis within printed constructs.
Main Methods:
- Formulation of a new bio-resin using methacrylated poly(vinyl alcohol) (PVA-MA) and gelatin-methacryloyl (Gel-MA).
- Incorporation of a transition metal-based visible light photoinitiator for high-resolution printing.
- Fabrication of cell-laden hydrogel constructs using DLP bioprinting and assessment of cell behavior and tissue formation.
Main Results:
- Successful bioprinting of high-resolution features (25-50 μm) using the visible light photo-initiating system.
- Sustained high cell viability (>90% for 21 days) and demonstrated endothelial cell attachment and spreading.
- Confirmed bone and cartilage tissue synthesis by encapsulated stem cells within the DLP-bioprinted hydrogels.
Conclusions:
- The developed PVA-MA/Gel-MA bio-resin is suitable for high-resolution lithography-based bioprinting.
- The bio-resin supports excellent long-term cell survival, functionality, and tissue-specific differentiation.
- This material shows significant potential for fabricating complex, free-form living tissue analogues for regenerative medicine.
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