华蟾素联合长春瑞滨对小鼠Lewis肺癌细胞周期的影响

目的 :研究华蟾素联合长春瑞滨对小鼠Lewis肺癌细胞周期的影响。方法 :5 0只皮下接种Lewis肺癌细胞的C57BL/ 6小鼠 ,随机分成华蟾素组、长春瑞滨组、华蟾素联合长春瑞滨组、环磷酰胺 (CTX)治疗对照组和生理盐水空白对照组。每天分别按 5ml/kg华蟾素、6 .7mg/kg长春瑞滨、两者联合、30mg/kg环磷酰胺以及 0 .2ml生理盐水予腹腔注射 ,给药 7天后处死 ,测定各组小鼠的皮下瘤重 ,计算抑瘤率 ,并运用流式细胞仪分析各组小鼠肿瘤细胞细胞周期各时相分布的状况。结果 :华蟾素组、长春瑞滨组、华蟾素联合长春瑞滨组的皮下瘤重较生理盐水组低 (P <0 .0 1) ,抑瘤率分别是 4 2 .86 %、4 5 .6 8%和 5 3.4 4 %。华蟾素组的肿瘤细胞S期细胞比例增高 ,长春瑞滨组的肿瘤细胞G2 /M期细胞比例增高 ,两药联合组的肿瘤细胞S期、G2 /M期细胞比例均有所增高。结论 :华蟾素和长春瑞滨对小鼠Lewis肺癌具有协同抑瘤作用 ,机制可能与其协同作用于细胞周期有关。

Synergistic anti-cancer effects and mechanisms of huachansu plus vinorelbine on Lewis lung cancer cell in mice

Purpose:To study the synergistic inhibitory effects of huachansu plus vinorelbine on cell growth in mice bearing Lewis lung cancer. Methods:Fifty mice bearing Lewis lung cancer were randomly divided into control group,cyclophosphamide group (CTX),huachansu group (HCS), vinorelbine group (VNB) and huachansu plus vinorelbine group (HV). Each group included ten mice. Normal saline (0.2 ml),cyclophosphamide (30 mg/kg),huachansu (5 ml/kg),vinorelbine (6.7 mg/kg),huachansu (5 ml/kg) plus vinorelbine group (6.7mg/kg) were injected intraperitoneally,respectively in the five groups. After the drugs were administered for seven days,all mice were sacrificed and the tumors were weighed. The tumor inhibitory rates were calculated and compared among the five groups of mice. The growth cycles of Lewis lung cancer were analyzed with flow cytometry. Results:The tumor inhibitory rates of HCS,VNB and HV group were 42.86% ,45.68%,53.44%,respectively. The percentage of S phase of cell cycle was increased in HCS and the percentage of G 2 /M phase increased in VNB,and both increased in HV group. Conclusions:There exists synergistic inhibitory effect on Lewis lung cancer between huachansu and vinorelbine and the mechanisms could correlate with their synergistic effect on cell growth cycles.