鬼臼毒素纳米脂质体对宫颈癌细胞增殖和凋亡的影响

目的 研究鬼臼毒素纳米脂质体(PDP-SLN)对宫颈癌细胞系Hela细胞增殖及凋亡的影响.方法 不同浓度(0.0005～5.000 ?mol/L)鬼臼毒素(PDP)及PDP-SLN分别处理Hela细胞,MTT法检测细胞增殖活性.Annexin V/PI染色,流式细胞术检测细胞凋亡.结果 (1)PDP-SLN及PDP对Hela细胞增殖的抑制作用为明显的剂量依赖性和时间依赖性,同药物浓度同时间孵育条件下,PDP-SLN对细胞增殖的抑制效果明显优于PDP.24、48、72 h的半数抑制浓度(IC50)PDP-SLN为4.10、0.65、0.20 ?mol/L,PDP为9.2、4.0、1.3 ?molFL.(2)PDP-SLN及PDP均可以明显促进细胞凋亡.PDP-SLN 24、72 h诱导的凋亡率为90.8％和94.2％;PDP 24、72 h诱导啁亡率为64.I％和68.4％.结论 PDP-SLN具有更强的增殖抑制和凋亡诱导效果.

Effects of podophyllotoxin solid lipid nanoparticles on proliferation and apoptosis of cervical carcinoma cells

OBJECTIVE: To evaluate the anti-proliferative and apoptosis-inducing effect of podophyllotoxin solid lipid nanoparticles (PDP-SLN) in human cervical carcinoma cells in vitro. METHODS: Hela cells were treated with PDP and PDP-SLN at different concentrations (0.0005-5 micromol/L), and the proliferation of the cells was assessed using MTT assay and the apoptotic index was determined by flow cytometry. RESULTS: Both PDP and PDP-SLN showed obvious inhibitory effect on the cell proliferation in a dose- and time-dependent manner. At the same concentration, PDP-SLN produced stronger inhibitory effect on the cells than PDP, with IC50 24, 48, and 72 h after the cell exposure to PDP-SLN and PDP of 4.10, 0.65, 0.20 micromol/L and 9.2, 4.0, 1.3 micromol/L, respectively. Both PDP and PDP-SLN significantly induced the apoptosis of the Hela cell, and the apoptosis rates of the cells incubated in the presence of 0.5 micromol/L PDP-SLN reached 90.8% at 24 h and 94.2% at 72 h, significantly higher than the rate of cells incubated with PDP (64.1% at 24 h and 68.4% at 72 h, P<0.01). CONCLUSION: PDP-SLN can effectively suppress the proliferation and induce apoptosis of Hela cells in vitro.