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Clay nanotube-biopolymer composite scaffolds for tissue engineering
Ekaterina A Naumenko1, Ivan D Guryanov1, Raghuvara Yendluri2
1Bionanotechnology Lab, Institute of Fundamental Medicine and Biology, Kazan Federal University, Kreml uramı 18, Kazan, Republic of Tatarstan 420008, Russian Federation. kazanbio@gmail.com.
Nanoscale
|March 15, 2016
Summary
Natural clay nanotubes enhance chitosan-gelatine-agarose hydrogels for tissue engineering. These biocompatible scaffolds promote cell growth and blood vessel formation, showing excellent resorption in vivo.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Nanotechnology
Background:
- Biopolymer hydrogels are crucial for tissue engineering but often lack sufficient mechanical strength and vascularization.
- Incorporating nanomaterials can enhance hydrogel properties for improved biological applications.
- Halloysite nanotubes offer a promising natural clay reinforcement for biomaterials.
Purpose of the Study:
- To develop novel cross-linker-free porous biopolymer hydrogels doped with halloysite nanotubes.
- To evaluate the mechanical, thermal, and water uptake properties of the nanocomposite hydrogels.
- To assess the in vitro and in vivo biocompatibility, biodegradability, and tissue integration capabilities of the scaffolds.
Main Methods:
- Fabrication of chitosan-gelatine-agarose hydrogels doped with 3-6 wt% halloysite nanotubes via freeze-drying.
- Characterization of mechanical strength, water uptake, thermal properties, and nanotube distribution using SEM and AFM.
- In vitro assessment of cell adhesion, proliferation, viability, and cytoskeleton formation.
- In vivo evaluation of biocompatibility, biodegradability, and neo-vascularization in rat implantation models.
Main Results:
- The halloysite-doped hydrogels exhibited doubled pick load, enhanced water uptake, and improved thermal properties compared to undoped hydrogels.
- SEM and AFM confirmed uniform dispersion of halloysite nanotubes within the hydrogel matrix.
- In vitro studies showed excellent cell adhesion and proliferation without compromising cell viability or cytoskeleton integrity.
- In vivo studies demonstrated good biocompatibility, complete resorption within six weeks, and significant neo-vascularization at implantation sites.
Conclusions:
- Cross-linker-free halloysite-doped chitosan-gelatine-agarose hydrogels possess enhanced mechanical and thermal properties.
- The nanocomposite scaffolds are cytocompatible and promote significant neo-vascularization and tissue integration.
- These halloysite-doped scaffolds represent promising biomaterials for diverse tissue engineering applications.
