Multifunctional Scaffold for Osteoporotic Pathophysiological Microenvironment Improvement and Vascularized Bone Defect Regeneration.
Yanan ZhaoHonglei KangXiaopei WuPengzhen ZhuangRong TuTakashi GotoFeng LiHongLian DaiPublished in: Advanced healthcare materials (2023)
Osteoporosis is a degenerative bone disease resulting from bone homeostasis imbalance regulated by osteoblasts and osteoclasts. Treating osteoporotic bone defects tends to be more difficult due to suppressed osteogenic differentiation, hyperactive osteoclastogenesis, and impaired angiogenesis. Hence, a drug carrier system composed of gelatin-coated hollow mesoporous silica nanoparticles (HMSNs/GM) loaded with pro-osteogenic parathyroid (PTH) and anti-osteoclastogenic alendronate (ALN) is constructed and compounded into calcium magnesium phosphate cement (MCPC). The spatial-temporal release of ions and drugs, controllable degradation rate, and abundant pore structure of MCPC composites enhance osteoporotic bone regeneration in ovariectomized rats by accelerating vascularization, promoting osteogenic differentiation and mineralization, and inhibiting osteoclastogenesis and bone resorption. The MCPC/HMSNs@ALN-PTH/GM demonstrates a synergistic threefold effect on osteogenesis, osteoclastogenesis, and angiogenesis. It improves the osteoporotic pathophysiological microenvironment and promotes osteoporotic vascularized bone defect regeneration, holding huge potential for other functional biomaterials design and clinical management.
Keyphrases
- bone mineral density
- bone regeneration
- bone loss
- postmenopausal women
- body composition
- stem cells
- mesenchymal stem cells
- bone marrow
- soft tissue
- drug delivery
- endothelial cells
- emergency department
- inflammatory response
- cancer therapy
- vascular endothelial growth factor
- lps induced
- gold nanoparticles
- drug induced
- tissue engineering
- quantum dots
- anti inflammatory
- high resolution
- aqueous solution