Preparation and detection of VEGF chitosan microspheres with different concentrations / 中华医学美学美容杂志

ABSTRACT

Objective To evaluate the effects of chitosan microspheres as the ball wall,pre pared by emulsion cross-linked VEGF chitosan microspheres.Methods 1 ％ chitosan aqueous solution as the aqueous solution and genipin as a cross-linking agent were used to detect the drug loading rate and cumulative release rate of drug-loaded microspheres by ELISA.Results VEGF chitosan microsphere size was about 5.25-20.34 μm;electron microscopy showed that microspheres surface was smooth,decentralized,and had small adhesions each other.The highest encapsulation efficiency was (56.33±3.42) ％ and the highest drug loading rate was (18.75±0.32) ng/mg.In vitro release experiments showed that the concentration of VEGF increased gradually with the passage of time.The release rate of microspheres was (32.32±2.31)％ on the first day and (86.42±1.68)％ on the 21st day.The cumulative release rate was 88.7％.Conclusions Genipin can be used to prepare chitosan microspheres loaded with different concentrations of VEGF with good performance and simple preparation process.The drug-loading rate and entrapment efficiency of the obtained microspheres are both high.