| Abstrakt: |
Objective: To prepare cationic liposome nanoparticles loaded with survivin -siRNA and Cnidium monnieri based on the ability of liposomes to contain both water-soluble and lipid soluble components. Methods: The preparation technology of Osthol cationic liposomes was optimized by orthogonal test with membrane material ratio, drug lipid ratio, ultrasonic time and steaming temperature as factors. The volume ratio of HA-siRNA to protamine and the ratio of HA-siRNA protamine complex to liposome were investigated by control variable method with potential and particle size as indexes. The particle size and zeta potential were measured by potentiometric particle size analyzer, and the shape was observed by transmission electron microscope; The absorbance of different concentrations of FAM-Survivin-siRNA standard solution was measured by microplate analyzer, and the entrapment efficiency of cationic liposomes loaded with FAM-Survivin-siRNA and osthole was calculated. Results: The optimum preparation conditions of osthole loaded cationic liposomes were as follows: the ratio of membrane to material was 3:1, the ratio of drug to lipid was 1:5, the steaming temperature was 30°, the ultrasonic time was 70 min, and the encapsulation efficiency was 78.34%. The optimum preparation conditions of osthole loaded cationic liposomes loaded FAMSurvivin-siRNA were as follows: the volume ratio of Survivin-siRNA to protamine was 1:1, Protamine complex 25µg. Add 50µL cationic liposomes. The particle size is 132.3±0.2nm, zeta potential is 43.15±0.05mv, and its shape is irregular round; According to the standard curve, the entrapment efficiency of cationic liposome nanoparticles co loaded with Survivin-siRNA and osthole was 81.34 ± 0.041%. Conclusion: The prepared cationic liposome nanoparticles loaded with Survivin-siRNA and osthole have good encapsulation efficiency, particle size and zeta potential. [ABSTRACT FROM AUTHOR] |
