异甘草素脂质体的制备及其对宫颈癌细胞体外增殖的抑制作用

目的: 研究异甘草素（ISL)脂质体对宫颈癌细胞体外增技的影响。方法: 采用超声波薄膜分散法制备ISL脂质体;葡聚糖凝肢层析法分离含药脂质体与游离药物并测定包封率;离心加速试验考察其稳定性;活细胞计数法测定生长曲线;MTT法测定细胞增殖。结果: ISL脂质体的平均粒径为233.1 nm,跨距为0.74,包封率为（70.8±2.5) %,稳定性好;ISL脂质体（5~80μmol·L^-1)浓度依赖性地抑制宫颈癌细胞HeLa和SiHa细胞增殖,并呈时间依赖性,于d3达高峰,其抑制率最高分别为83.44%和96.14%;浓度依赖性(5~80 μmol·L^-1)抑制 HeLa 和SiHa 增殖,ICW分别为 34.24 和 29.82 μmol·L^-1 (ISL的 IC₅₀分别为 75.39 和 69.33 μmol·L^-1) 结论: 该制备工艺与处方可行,命制备的ISL脂质体对人宫颈癌细胞体外增殖有明显的抑制作用,且作用明显强于ISL。

Preparation of isoliquiritigenin liposome and its inhibitive effects on prolif-eration of human cervical cancer cells in vitro

AIM: To study the effects of isoliquiritig-enin (ISL) liposome on the proliferation of human cervical cancer cells in vitro. METHODS: ISL liposome was prepared by filmultrasonic technique. The liposome and free ISL were separated by Sephadex G-25 exclusion chro-matography and the encapsulation rates were determined. The growth inhibitive effects on cell proliferation were evaluated by trypan blue exclusion and MTT method. RESULTS: The particle size of ISL liposome was 233.1 nm and the span was 0.74. The encapsulation rate was (70.83±2.5) % and the liposome was stable. ISL lipo-some (5-80μmol·L^-1) inhibited the proliferation of hu-man cervical cancer cells in a concentration-and time-dependent manner, and the inhibitive rates of HeLa and SiHa cells reached the maximum at d 3 of culture (the maximum inhibitive rate was 83.44% and 96.14%). The IC₅₀ of HeLa and SiHa cells which were exposed to ISL liposome for 48 h was 34.24 and 29.82 μmol·L^-1, respectively, and which were exposed to free ISL for 48 h was 75,39 and 69.33 μmol·L^-1, respectively. CONCLUSION: This formulation and technology are stable and practical. The ISL liposome can significantly inhibit the proliferation of human cervical cancer cells in vitro.