大鼠肝癌射频消融治疗前后与树突状细胞相关趋化因子的变化

目的 通过检测大鼠肝癌射频消融(RFA)治疗前后肝和脾与树突状细胞相关的趋化因子的变化,深入了解RFA对机体抗肿瘤免疫应答影响的机制.方法 取健康SD大鼠40只,建立大鼠Walker256肝癌模型,随机分为对照组(10只)、治疗7 d组(16只)和治疗14 d组(14只).对照组不做治疗直接处死取材,后两组分别在RFA治疗后7 d和14 d处死取材.采用ELISA法检测肿瘤周边或消融灶周边0.5 cm范围内肝组织巨噬细胞炎性蛋白(MIP)-1a浓度和脾MIP-3β浓度.结果 对照组瘤周肝组织内MIP-1a浓度为(232.92±54.58)ng/L,RFA治疗7 d组和14 d组分别增高为(499.38±15.14)ng/L、(495.90±9.94)ng/L,与对照组相比差异均有统计学意义(P＜0.05);对照组脾MIP-3β浓度为(70.08±2.67)ng/L,治疗7 d组和14 d组分别增高为(151.57±48.48)ng/L、(154.57±18.25)ng/L,与对照组相比差异有统计学意义(P＜0.05).结论 RFA治疗后大鼠肝局部MIP-1a和脾MIP-3β表达水平增高,后者可能促进树突状细胞的迁移及分化成熟,有利于机体抗肿瘤免疫应答的恢复.

The alterations of chemokines related to dendritic cells in rats with hepatic carcinoma treated by radiofrequency ablation

Objective To investigate the changes of chemokines related to dendritic cells in liver and spleen in rats with hepatic carcinoma treated by radiofrequency ablation (RFA),and to explore the mechanism of anti-tumor responses to RFA.Methods Forty healthy SD rats with established animal model of hepatic carcinoma were randomly divided into control group (n=10),RFA 7d group (n=16) and RFA 14d group (n=14).The rats of control group were killed without treatment.The other rats were killed in 7d and 14d after RFA treatment respectively.Spleen and liver tissue around the ablation area or around the tumor were taken out.The expressions of macrophage inflammatory protein (MIP)-1a in liver tissue and MIP-3β in spleen were analyzed by ELISA.Results The expression of MIP-1a in liver tissue was (232.92±54.5B)ng/L in control group,which enhanced to (499.38±15.14)ng/L and (495.90±9.94)ng/L in RFA 7d and 14d groups respectively.There were significant differences between control and RFA 7d group,control and RFA 14d group(P＜0.05).The expression of MIP-3βin spleen was (70.08±2.67) ng/L in control group,which enhanced to (151.57±48.48)ng/L and (154.57±18.25)ng/L in RFA 7 d and 14 d groups respectively.There were significant differences between control and RFA 7 d group,control and RFA 14 d group (P＜0.05).Conclusions The expressions of MIP-1a in liver tissue and MIP-3β in spleen increase significantly after RFA.These changes will promote recruitment and migration of dendritic cells and may contribute to the anti-tumor responses after RFA.