AI Article Synopsis
- Osteoporosis is a bone disease caused by an imbalance between bone formation and breakdown, making treatment of defects challenging due to factors like impaired bone growth and increased bone loss.
- A new drug delivery system using gelatin-coated hollow mesoporous silica nanoparticles (HMSNs/GM) loaded with pro-osteogenic and anti-osteoclastic drugs is combined with calcium magnesium phosphate cement (MCPC) to enhance bone regeneration.
- The MCPC/HMSNs@ALN-PTH/GM system shows a combined effect on promoting bone formation, reducing bone loss, and improving blood vessel growth, indicating its potential for better treatment options for osteoporosis.
Article Abstract
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.
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| http://dx.doi.org/10.1002/adhm.202203099 | DOI Listing |
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