Journal
BIOPOLYMERS
Volume 110, Issue 12, Pages -Publisher
WILEY
DOI: 10.1002/bip.23328
Keywords
angiogenesis; bioactive glass nanoparticle; hydrogel; surface modification
Categories
Funding
- China Postdoctoral Science Foundation [2017M622641]
- Natural Science Foundation of Guangdong Province [2016A030308014]
- National Natural Science Foundation of China [51702104, 31771080, 51772106]
- National Key R&D Program of China [2018YFC1105301, 2018YFC1105304]
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Blood vessels play an important role in bone defect repair and growth, and a critical challenge of bone defect repair is the promotion of blood vessel formation. Most of the current methods promote vascularization by adding specific growth factors, which are costly and easy to inactivate. In this study, we developed a covalently cross-linked aminated bioactive glass nanoparticle-chondroitin sulfate methacrylate (ABGN-CSMA) organic-inorganic composite hydrogel with angiogenic properties. The amino groups of the ABGNs form covalent bonds with the carboxyl groups on CSMA. Surface amination modification of BGNs not only improved the dispersion of BGNs in CSMA but also significantly improved the mechanical properties of the composite hydrogel. The largest storage modulus (1200 Pa), the largest loss modulus (560 Pa) and the strongest resistance to deformation of the hydrogel are seen at 10% concentration of ABGNs. Simultaneously, the local pH stability and sustained ion release of the composite hydrogel are conducive to cell adhesion, proliferation, and angiogenesis. This work provides evidence for the development of covalently cross-linked organic-inorganic composite hydrogels with angiogenic properties.
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