阿霉素联合致敏树突状细胞对荷宫颈癌小鼠的治疗作用

Effect of adriamycin combined with sensitized dendritic cells on cervical tumor-bearing mice

目的:探讨阿霉素(adriamycin,ADM)联合冻融抗原致敏的树突状细胞(dendritic cells,DCs)对荷宫颈癌小鼠的免疫治疗作用。方法:建立小鼠皮下移植瘤模型;应用反复冻融法处理小鼠宫颈癌U14细胞,并致敏小鼠骨髓来源的DCs,制备DCs疫苗;流式细胞术鉴定DCs成熟表型;荷瘤小鼠分为对照组(PBS组)、DCs疫苗组、ADM组和ADM联合DCs疫苗组,进行3个周期的治疗。观察肿瘤大小,第21 d取血,ELISA法检测小鼠血清IL-2、IL-12和IFN-γ含量;处死动物,称肿瘤重量。结果:肿瘤冻融抗原致敏DCs后,可高表达白细胞分化抗原CD11c、CD80和CD86;经3个周期的治疗后,ADM联合DCs疫苗组平均瘤重及平均瘤体积均小于ADM组、DCs疫苗组和对照组(P<0.05),联合治疗组抑瘤率大于其它3组(P<0.05),且血清IL-2、IL-12和IFN-γ水平明显升高(P<0.05)。结论:ADM联合肿瘤抗原致敏的DCs疫苗可增强动物的抗肿瘤免疫应答,能有效抑制荷宫颈癌小鼠肿瘤的生长。

AIM ： To explore the immunotherapeutic effect of adriamycin （ADM） combined with frozen-thawed antigen-sensitized dendritic cells （DCs） on cervical tumor-bearing mice. METHODS： The U14 cervical cancer model of Kunming mice was established by subcutaneous implantion of U14 cells in axillary fossa. DCs vaccine was prepared by U14 cervical cancer cell frozen-thawed antigen-sensitized mouse bone marrow-derived DCs. Mature phenotype of sensitized DCs was identified by flow cytometry. Tumor-bearing mice were randomly divided into 4 groups and treated for 3 cycles with PBS （ control）, DCs vaccine, ADM and ADM combined with DCs vaccine, respectively. The tumor volume was evaluated. The tumor weight and the levels of interleukin-2 （IL-2）, IL-12 and interferon ~/ （IFN-~） in the serum were determined by ELISA on the 21st day. RESULTS： Cancer cell frozen-thawed antigen-sensitized DCs had higher expression levels of CDllC, CD80 and CD86. The volume and weight of the tumor in ADM combined with DCs vaccine group were less than those in ADM group, DCs vaccine group and control group. The tumor inhibitory rate in combination group was higher than that in the other 3 groups. Compared with the other 3 groups, the serum levels of IL-2, IL-12 and IFN--y in combination group significantly increased. CONCLUSION： ADM combined with tumor antigen-sensitized DCs vaccine can strengthen the animal antitumor immune response and effectively inhibit the growth of tumor in cervical tumor-bearing mice.