Effect of combined treatment with cyclophosphamidum and allicin on neuroblastoma-bearing mice

Objective:To evaluate the efficacy of allicin combined with cyclophosphamide on neuroblastoma(NB)-bearing mice and explore the immunological mechanism in it.Methods:A total of 30NB-bearing mice were equally randomized into model group,cyclophosphamide group and combined therapy group,10 nudemice were set as normal saline(NS) group.Cyclophosphamide group and combined therapy group were weekly injected with 60 mg/kg cyclophosphamide for four weeks;besides,combined therapy group was given with allicin(10 mg/kg/d) by gastric perfusion for 4 weeks;model group and NS group were given with the same volume of NS.Serum VEGF content was detected by ELISA pre-treating(0 d) and on the 3rd d.14 th d and 28 th d;on29th d,all mice were sacrificed and the tumor,liver,spleen and thymic tissues were weighted.Tumors were made into paraffin section for detecting tumor cell apoptosis and proliferation by TUNEI.and BrdU method,respectively.Survival curves were drawn by Kaplan-Meier method.Results:After treatment,both treatment groups relieved on viscera indexes,VEGF level,T cell subsets distribution and tumor growth and each index of combined therapy group was better than cyclophosphamide group(P【0.05 or 0.01);only combined therapy group could significantly increase the lifetime of NB-bearing mice(χ~2=5.667,P=0.017).Conclusions:Allicin can improve T cell subsets distribution and inhibit VEGF expression through its immunomodulatory activity,thereby improve the efficiency on NB in coordination with cyclophosphamide.

Study on the influence of curcumin on chemosensitivity of nephroblastoma cells

Objective:To study the influence of curcumin on chemosensitivity of nephroblastoma cells.Methods:Human nephroblastoma cells line SK-NEP-1 was transplanted to the nude mice subcutaneously to establish the implantation tumor model of human nephroblastoma cells.A total of 30 tumor-bearing mice were divided into three groups of ten randomly.The routine chemotherapy group was given vincristine(0.05 mg/mL·0.2 mL/d) and actinomycin D(15 ng/mL·0.2 mL/d) combined chemotherapy regime.The curcumin chemotherapy group was given the same combined chemotherapy regimens and curcumin(30 mg/kg/d) by intraperitoneal injection.The control group was given normal saline(NS) of the same volume by intraperitoneal injection.Continuous administration would be kept for 4 weeks and 3 days a week.The volumetric changes of every group were recorded.The serum of every group in different time was collected and the VEGF content was detected by ELISA.All mice were cercrificed and the tumor tissues were stripped and weighed after 4 weeks’ treatment.The tumor inhibition rate was calculated.The cell proliferation activity and apoptosis rate were detected by MTT and flow cytometry method.All data were statistically analyzed by SPSS 19.0.Results:The tumor volume,serum VEGF content,tumor inhibition rate,cell proliferation activity and apoptosis rate of routine chemotherapy group and curcumin chemotherapy group had significant differences comparing with the control group(P<0.05) after 4-week’s treatment.The cancer growth of curcumin chemotherapy group was obviously decreased and even tended to shrink comparing with routine chemotherapy group(χ2=15.732,P=0.007).The cell proliferation activity was significantly reduced and the apoptosis rate was significantly higher,(χ~2=9.427,P=0.012)which showing the effect of chemotherapy was enhanced.Conclusions:The chemosensitivity of nephroblastoma cells could be improved by curcumin,then the effect of preoperative adjuvant chemotherapy scheme would be enhanced,the growth of nephroblastoma cells would be inhibited and the surgical risk of nephroblastoma would be reduced.