bFGF单抗联合放疗对小鼠B16移植瘤的协同抑制作用

目的:探讨碱性成纤维细胞因子单克隆抗体(basic fibroblast growth factor monoclonal antibody,bFGF-mAb)联合放疗对小鼠B16移植瘤的抑制效应。方法:制备并提纯小鼠bFGF-mAb,建立荷B16黑素瘤小鼠模型并随机分为对照组、放疗组、bFGF-mAb组及联合治疗组。各组经相应治疗后,测量移植瘤体积;治疗20 d后处死小鼠,取移植瘤称瘤质量,计算抑瘤率。TUNEL法检测移植瘤细胞凋亡率,免疫组化检测移植瘤组织bFGF、血管内皮生长因子(vascular endothelial growth factor,VEGF)的表达率及肿瘤微血管密度(microvessel density,MVD)。结果:bFGF-mAb治疗、放疗、联合治疗的抑瘤率分别为30.49%、12.17%和48.76%,联合治疗组的抑瘤率明显高于其他组(P<0.05);与放疗组比较,联合治疗组的放射增敏率为2.37。联合治疗组移植瘤细胞凋亡较放疗组、bFGF-mAb组及对照组明显增多[(58.56±6.47)%vs(17.21±2.86)%,(28.45±5.47)%,(10.62±1.73)%;P<0.05或P<0.01],其bFGF、VEGF表达水平下降,MVD明显减少(P<0.05)。结论:bFGF-mAb联合放疗对B16移植瘤具有协同抑瘤效应,通过降低肿瘤组织bFGF和VEGF表达、抑制血管新生、促进瘤细胞凋亡提高放疗敏感性。

Synergistic inhibitory effects of bFGF monoclonal antibody combined with radiotherapy on B16-transplanted tumors in mice

Objective: To investigate the inhibitory effect of basic fibroblast growth factor monoclonal antibody(bFGF-mAb) combined with radiotherapy against B16-transplanted tumors in mice.Methods: bFGF-mAb was prepared and purified.B16-transplanted melanoma tumor models were established and the mice were randomly divided into 4 groups: control group,radiotherapy group,bFGF-mAb group,and bFGF-mAb combined with radiotherapy group.Tumor volumes were measured in different treatment groups.Twenty days after treatment,the...