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Submicron bioactive glass tubes for bone tissue engineering
Jingwei Xie1, Eric R Blough, Chi-Hwa Wang
1Marshall Institute for Interdisciplinary Research, Center for Diagnostic Nanosystems, Department of Biology, Marshall University, Huntington, WV 25755, USA. xiej@marshall.edu
Acta Biomaterialia
|September 28, 2011
Summary
Researchers developed submicron bioactive glass tubes using sol-gel and coaxial electrospinning for bone tissue engineering. These tubes show enhanced bioactivity and potential for drug delivery.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Nanotechnology
Background:
- Bioactive glasses promote bone regeneration by stimulating hydroxyapatite formation.
- Existing fabrication methods often yield solid structures, limiting surface area and drug loading capacity.
- Developing tubular scaffolds with controlled porosity is crucial for enhanced cell infiltration and nutrient transport in bone tissue engineering.
Purpose of the Study:
- To fabricate submicron bioactive glass tubes using sol-gel and coaxial electrospinning.
- To evaluate the bioactivity, biocompatibility, and drug delivery capabilities of these novel tubular structures.
- To compare the performance of bioactive glass tubes with solid fibers for bone tissue engineering applications.
Main Methods:
- Sol-gel and coaxial electrospinning techniques were employed to create tubular structures.
- Calcination at 600 °C removed sacrificial components and formed the glass tubes.
- Bioactivity was assessed via hydroxyapatite formation in simulated body fluid; biocompatibility was tested using MC3T3-E1 cells; drug release was studied using bovine serum albumin.
Main Results:
- Submicron bioactive glass tubes were successfully fabricated with tubular morphology confirmed by electron microscopy.
- Glass tubes exhibited robust hydroxyapatite mineralization on both inner and outer surfaces in simulated body fluid, exceeding that of solid fibers.
- Cell proliferation on glass tubes was comparable to solid fibers, and tubes demonstrated sustained release of loaded bovine serum albumin with high bioactivity of released lysozyme.
Conclusions:
- Submicron bioactive glass tubes represent a promising scaffold for bone tissue engineering.
- The tubular architecture enhances bioactivity and facilitates controlled drug/gene delivery.
- This fabrication method offers a versatile platform for developing advanced biomaterials for regenerative medicine.
