Programmed release of hydrogel microspheres via regulating the immune microenvironment to promotes bone repair

Bone tissue repair is influenced by the synergistic interaction between acute immune microenvironment and osteogenesis. In this study will be independently by film dispersion method and static loading shell polymers and resveratrol liposome preparation CS - Res @ Lipo (CRL) and microfluidic technology preparation of HAMA@HepMA hydrogel microspheres (MS) by condensation reaction of chemical grafting, and then the non-covalent binding site of the MS microsphere was used to skillfully bind BMP-2, construct procedural release of hydrogel microspheres (CRL @ BMP - 2 @ MS). CRL@BMP-2@MS inhibit the acute immune peak by rapidly releasing Res, in addition, the sustained liberation of BMP-2 synchronizes osteoimmunity and osteogenesis, thereby accelerating bone repair. The results showed that Res was released with an increased cumulative rate of 72.4 ± 3.6% in the first 24 h, TNF-α and IL-1β levels were significantly decreased by 4.27 times and 3.65 times as compared to the control group, respectively. Furthermore, continuous release of approximately 40.26 ± 6.8% of BMP-2 occurred within the first 72 h, CRL@BMP-2@MS microspheres significantly increased osteogenic activity compared with the control group by 2.98 and 2.82 times, respectively. In conclusion, the programmed CRL@BMP-2@MS constructed in this study can realize the programmed synergistic linkage of immunity and osteogenesis, dynamically regulate bone repair, and the treatment of clinical bone repair will be based on a new strategy for diagnosis and treatment. This study will be made by independent film dispersion method and static loading preparation shell polymers and resveratrol liposome CS-Res@Lipo (CRL) and microfluidic technology preparation of HAMA@HepMA hydrogel microspheres (MS) by condensation reaction of chemical grafting, then using MS non covalent binding sites clever combination of BMP-2, construct programmed release of hydrogel microspheres (CRL@BMP -2@MS). CRL@BMP-2@MS can inhibit the acute immune peak through rapid release of Res, and at the same time cooperatively initiate the sustained release of BMP-2, which can program the coupling of immunity and osteogenesis and accelerate the process of bone repair. [Display omitted]