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3D Printed Porous Cellulose Nanocomposite Hydrogel Scaffolds
Published on: April 24, 2019
Engineering microporosity in bacterial cellulose scaffolds
Henrik Bäckdahl1, Maricris Esguerra, Dick Delbro
1Biopolymer Technology, Department of Chemical and Biological Engineering, Chalmers University of Technology, SE-412 96 Göteborg, Sweden.
Journal of Tissue Engineering and Regenerative Medicine
|July 11, 2008
Summary
Researchers developed a novel method for creating 3D bacterial cellulose scaffolds using Acetobacter xylinum. These scaffolds feature controlled microporosity and support smooth muscle cell attachment and proliferation for tissue engineering applications.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Nanotechnology
Background:
- Scaffolds are critical for tissue engineering, providing structural support for cell growth.
- Bacterial cellulose (BC) offers excellent biocompatibility and mechanical properties for scaffold fabrication.
- Developing BC scaffolds with controlled porosity is essential for mimicking native tissue architecture.
Purpose of the Study:
- To develop a novel method for preparing 3D nanofibril network scaffolds with controlled microporosity.
- To investigate the incorporation and removal of porogens (paraffin wax and starch particles) within BC scaffolds.
- To evaluate the suitability of these scaffolds for tissue-engineered blood vessels by assessing smooth muscle cell (SMC) interaction.
Main Methods:
- Utilized Acetobacter xylinum culture to synthesize bacterial cellulose.
- Incorporated paraffin wax and starch particles of varying sizes as porogens during bacterial cellulose growth.
- Removed porogens using established methods, with residue analysis via electron spectroscopy for chemical analysis (ESCA) and Fourier transform infra-red spectroscopy (FT-IR).
- Seeded scaffolds with smooth muscle cells (SMCs) and analyzed cell attachment, proliferation, and integration using histology and organ bath techniques.
Main Results:
- Successfully prepared 3D bacterial cellulose scaffolds with distinct morphologies and interconnectivity.
- Paraffin particles were distributed throughout the scaffold, while starch particles localized to the outer regions.
- Porogens were completely removed without detectable residues, confirmed by ESCA and FT-IR.
- Histological and organ bath analyses demonstrated significant SMC attachment, proliferation, and partial infiltration into the scaffolds.
Conclusions:
- A novel and effective method for fabricating 3D bacterial cellulose scaffolds with controlled microporosity has been established.
- The developed scaffolds provide a suitable microenvironment for smooth muscle cell growth and integration.
- These findings highlight the potential of these scaffolds for applications in tissue-engineered blood vessels.
