Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 13, Issue 42, Pages 49762-49779Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c17472
Keywords
biopolymers; injectable hydrogels; silica-apatite-based alendronate carriers; biocompatibility in vivo; osteoporosis; bone tissue engineering
Funding
- National Science Centre, Poland [2016/21/D/ST5/01635]
- Jagiellonian University of CTT CITTRU funds
- National Science Centre [2020/36/T/ST5/00184]
- EU [POWR.03.02.00-00-I004/16]
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Novel multifunctional biomimetic injectable hybrid systems have been synthesized, showing promise for bone tissue regeneration. These systems can be injected precisely into diseased tissue, serving as scaffolds for locally controlled bone tissue regeneration and remodeling while maintaining optimal bone cell levels. They are especially useful for repairing small osteoporotic bone defects and lack systemic toxicity.
Novel multifunctional biomimetic injectable hybrid systems were synthesized. The physicochemical as well as biological in vitro and in vivo tests demonstrated that they are promising candidates for bone tissue regeneration. The hybrids are composed of a biopolymeric collagen/chitosan/hyaluronic acid matrix and amine group-functionalized silica particles decorated with apatite to which the alendronate molecules were coordinated. The components of these systems were integrated and stabilized by cross-linking with genipin, a compound of natural origin. They can be precisely injected into the diseased tissue in the form of a viscous sol or a partially cross-linked hydrogel, where they can serve as scaffolds for locally controlled bone tissue regeneration/remodeling by supporting the osteoblast formation/proliferation and maintaining the optimal osteoclast level. These materials lack systemic toxicity. They can be particularly useful for the repair of small osteoporotic bone defects.
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