Functionalized polyhedral oligosilsesquioxane (POSS) based composites for bone tissue engineering: synthesis, computational and biological studies.
Laura LegnaniDaniela IannazzoAlessandro PistoneConsuelo CelestiSalvatore Vincenzo GiofrèRoberto RomeoAngela Di PietroGiuseppa VisalliMonica FrestaPaola BottinoIgnazio BlancoMaria Assunta ChiacchioPublished in: RSC advances (2020)
Functionalized polyhedral oligosilsesquioxanes (POSS) containing an isoxazolidine nucleus have been synthesized by microwave assisted 1,3-dipolar cycloaddition of N -methyl- C -alkoxycarbonyl nitrone 1 with POSS containing olefin moieties. The results of cycloaddition processes were rationalized by computational studies at the DFT level. The covalent conjugation of chitosan with the cycloadduct 3a leads to composite material CS-POSS 7 which was gelified using genipin as cross linking agent. The suitability of the system for bone tissue engineering purposes was evaluated by in vitro drug release studies using ketoprofen as a model drug and cytotoxicity assays performed on human fetal osteoblastic cells. The preliminary biological tests showed the lack of cytotoxicity of the hybrid material and suggest its potential role in bone tissue engineering applications.
Keyphrases
- tissue engineering
- drug release
- bone mineral density
- drug delivery
- case control
- soft tissue
- bone loss
- endothelial cells
- induced apoptosis
- quantum dots
- postmenopausal women
- emergency department
- cell cycle arrest
- body composition
- cell proliferation
- cell death
- density functional theory
- molecular docking
- oxidative stress
- molecular dynamics
- signaling pathway
- molecularly imprinted
- vascular smooth muscle cells
- induced pluripotent stem cells
- angiotensin ii
- tandem mass spectrometry
- visible light