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Injectable Supramolecular Polymer-Nanoparticle Hydrogels for Cell and Drug Delivery Applications
Published on: February 7, 2021
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Injectable hydrogel incorporating with nanoyarn for bone regeneration
Wei Liu1, Jianchao Zhan, Yan Su
1a State Key Lab for Modification of Chemical Fiber & Polymer Materials , College of Material Science and Engineering, Donghua University , Shanghai 201620 , P.R. China.
Journal of Biomaterials Science. Polymer Edition
|October 22, 2013
Summary
This study introduces a novel injectable bone substitute made of Poly (L-lactide-co-ε-caprolactone) nanoyarns in collagen hydrogel. This biomimetic scaffold enhances bone regeneration with improved cell growth and activity.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Tissue Engineering
Background:
- Traditional bone grafting involves invasive surgery, leading to complications like scarring, pain, and prolonged recovery.
- There is a significant demand for advanced bone graft substitutes to overcome the limitations of current methods.
Purpose of the Study:
- To develop and evaluate a novel injectable biomimetic bone substitute for enhanced bone regeneration.
- To assess the potential of a Poly (L-lactide-co-ε-caprolactone) (P(LLA-CL)) nanoyarn/collagen (Col) hydrogel system.
Main Methods:
- Fabrication of continuous P(LLA-CL) nanoyarns using a dynamic liquid support system.
- Incorporation of chopped nanoyarns into type I collagen hydrogel, followed by rheological and injectability assessments.
- In vitro evaluation of human mesenchymal stem cell (hMSC) proliferation, alkaline phosphatase activity, and osteocalcin expression.
Main Results:
- The P(LLA-CL) nanoyarns enhanced the mechanical properties of the collagen hydrogel.
- The composite material demonstrated excellent injectability through a 16-gauge needle.
- hMSCs exhibited robust proliferation and significantly increased osteogenic differentiation markers on the nanoyarn-enhanced hydrogel.
Conclusions:
- The developed injectable biomimetic scaffold shows promise for bone regeneration applications.
- This novel system offers a less invasive alternative to traditional bone grafting procedures.
- Further research is warranted to explore its clinical efficacy in bone defect repair.
