Objective To prepare a targeted ultrasound micro bubble,which carried the HSV-TK gene,and investigate the in vitro target searching ability of the micro bubbles and inhibitory effect on the proliferation of HepG2 cells.Methods Ultrasonic micro bubbles were prepared by mechanical vibration method,construction of targeted HSV-TK ultrasound micro bubbles by biotin affinity bridge construction.To detect the general characteristics of ultrasound micro bubbles,and to test its effect on the proliferation of HepG2 cells in vitro.Results HSV-TK targeted ultrasound microbubbles more gathered on the surface of HepG2 cells,through detection of PCNA and MTT,it was found that the proliferation of gene targeting microbubble group was obviously decreased,cell apoptosis increased significantly,Cells invade experiments showed that the number of cells in genetic microbubble group (22.18 ± 2.01) decreased significantly compared with the control group and the nontargeted group,can effectively inhibit the proliferation and invasive ability of HepG2 cells.Conclusion Targeted ultrasound microbubble carrying target gene have better inhibitory effect on HepG2 cells in vitro.%目的 制备一种靶向肝癌HepG2细胞的载单纯疱疹病毒胸腺嘧啶核苷激酶(HSV-TK)基因超声微泡,并考察其体外寻靶能力及对HepG2细胞的增殖抑制作用.方法 用机械振荡法制备超声微泡,生物素-亲和素桥连方式构建靶向载HSV-TK超声微泡.检测其一般特性,并进行体外实验检测其对HepG2细胞增殖的影响.结果 靶向载HSV-TK超声微泡可较多地聚集在HepG2细胞表面,通过检测增殖细胞核抗原(PCNA)及噻唑蓝(MTT)法,发现载基因靶向微泡组的增殖能力明显下降,细胞凋亡明显增加,细胞侵袭实验表明载基因靶向微泡组(22.18±2.01)较对照组及载基因非靶向微泡组明显减少,对HepG2细胞增殖及侵袭能力有较好的抑制作用.结论 携目的基因靶向超声微泡对肝癌HepG2细胞在体外有较好抑制效果.
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