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Versatile xanthan gum-based support bath material compatible with multiple crosslinking mechanisms: rheological
Guanyu Lai1, Laurence Meagher1,2
1Department of Materials Science and Engineering, Monash University, Clayton, Australia.
Biofabrication
|April 2, 2024
Summary
A novel xanthan gum-based support material enhances 3D bioprinting accuracy and cell viability. This versatile material is compatible with multiple crosslinking methods, improving bioink printability and construct integrity for tissue engineering applications.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Rheology
Background:
- Extrusion-based bioprinting requires support materials for fabricating 3D tissue constructs.
- Existing hydrogel support baths can be incompatible with bioink crosslinking, limiting their utility.
- Understanding common rheological properties of support baths is crucial for material development.
Purpose of the Study:
- To develop a versatile xanthan gum-based composite support material compatible with multiple bioink crosslinking mechanisms.
- To identify and explore common rheological properties of benchmark support bath materials.
- To assess the impact of the novel support material on bioink printability and cell viability.
Main Methods:
- Preparation of benchmark and xanthan gum-based composite support materials.
- Comparative rheological analysis to identify shared structural and shear behaviors (yield stress, moduli, shear-thinning, self-healing).
- Testing of support material stability with various crosslinking stimuli and evaluation of bioink printability, cytotoxicity, and cell encapsulation viability.
Main Results:
- A xanthan gum-based composite support material demonstrated compatibility with multiple crosslinking mechanisms.
- Common rheological properties, including yield stress, gel moduli, shear-thinning, and self-healing, were identified across different support materials.
- The novel support material improved bioink printability and structural integrity, with confirmed cell compatibility and viability.
Conclusions:
- The developed xanthan gum-based composite offers a versatile and compatible support material for extrusion-based 3D bioprinting.
- This material overcomes limitations of existing support baths, enhancing bioink printability and construct integrity.
- The study provides insights into essential support material properties, guiding future advancements in bioprinting technologies.
