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The development of novel multifunctional drug system 7,8-DHF@ZIF-8 and its potential application in bone defect healing

Physical exercise has long been considered an essential regulator of bone formation. Recent studies have shown that brain-derived neurotrophic factor (BDNF) is an important cytokine released during physical exercise to promote osteogenic differentiation and facilitate the bone defect healing process. In this study, we developed a multifunctional system 7,[email protected], which combines the superior osteogenesis and angiogenesis properties of ZIF-8 and the unique capability of 7,8-DHF to mimic the function of BDNF to compensate for the routine physical exercise missed during the bone defect period. Various material characterizations were performed to confirm the successful synthesis of 7,[email protected] Drug release experiments suggested that 7,[email protected] could achieve slow diffusive release under physiological conditions within seven days. In vitro cell experiments indicated that low concentrations of ZIF-8 and 7,[email protected] could significantly promote the proliferation of MC3T3-E1 cells. Moreover, as proved by RT-QPCR analysis, incorporating 7,8-DHF into ZIF-8 could further enhance osteogenesis and angiogenesis-related gene expression. Therefore, we believe that the multifunctional drug system 7,[email protected] should have promising applications to facilitate bone defect healing.

» Author: Qili Sun, Zhanpeng Liu, Chao Xie, Liqiu Hu, Huili Li, Yongmei Ge, Lijun Lin, Bin Tang

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