经导管动脉化疗栓塞联合内皮抑素对兔VX2肝移植瘤新生血管生成的影响

目的 探讨兔VX2肝移植瘤经介入治疗联合应用内皮抑素(endostatin,ES)治疗后,残瘤组织微血管密度(micmvagcular density,MVD)和血管内皮生长因子(vascular endothelial growth factor,VEGF)的表达情况及其相关性.方法 建立兔VX2肝移植瘤模型,随机分为对照组(n=10)、经导管动脉化疗栓塞(TACE)组(碘油+阿霉素,n=10)和TACE联合抗血管生成组(碘油+阿霉素+ES,n=10),术后1周取出病理标本,用免疫组织化学染色分别检测残瘤组织VEGF和MVD的表达,3组间的比较采用方差分析.结果 对照组、TACE组和TACE联合抗血管生成组的VEGF平均吸光度值(A)分别为0.130 ±0.038、0.200±0.049和0.120±0.047(F=9.42,P＜0.01),TACE组表达水平最高,与其余两组比较差异有统计学意义(q值分别为4.93、5.63,P＜0.01),TACE联合抗血管生成组VEGF的表达水平低于对照组,但两组之间差异无统计学意义(q=0.70,P＞0.05);各组MVD值分别为(80 ±17)、(84±16)和(57±13)个/高倍镜(F=8.70,P＜0.01),TACE联合抗血管生成组MVD值最低,与其余两组比较均有统计学意义(q值分别为4.63、5.48,P＜0.01),对照组和TACE组之间差异无统计学意义(q=0.85,P＞0.05).结论 TACE联合应用内皮抑素治疗较单纯化疗栓塞可以明显降低肿瘤VEGF的表达,并可显著减少肿瘤微血管的形成,影响肿瘤的预后.

Study on the effect of transcather arterial chemoembolization combined with endostatin on the angiogenesis in rabbit VX2 tumor

Objective To investigate the effect on the miemvnscular density(MVD)and the expression of vascular endothelial growth factor(VEGF)in VX2 tumor after transcatheter arterial chemoembolization(TACE)combined with endostatin.Methods The VX2 tumor model wag established.The rabbits bearing tunlor were randomly divided into three groups as the control group.TACE group and TACE combined with endostatin group.with 10 rabbits in each group.In the control group,normal saline was administered via the hepatic artery.In the TACE group,lipiodol(0.2 ml/kg)and ADM(2.g/kg)were administered.Lipiodol(0.2 ml/kg),ADM(2 mg/kg)and endostatin(2 mg/kg)were administered for each rabbit in the TACE combined with endostatin group.Seven days after operation,the rabbits were sacrificed and the tumors were removed.Immunohistochemistry wag performed to demonstrate the expression of VEGF and the MVD wag caleulated.The ANOVA wag used for statistics.Results The average absorbance values of VEGF were 0.130±0.038.0.200±0.049 and 0.120±0.047 respectively for the 3 groups.There was signiflcant difference among the three groups(F=9.42,P＜0.01).rnle expression of VEGF in the TACE group was the hiShest among the 3 groups.Compared with the otIler two groups,there had signifieant differences(q=4.93,5.63,P＜0.01).The average absorbance value of the TACE combined with endostatin group was lower than that of control group,but there was no significant difference between them(q=0.70,P＞0.05).The values of MVD were(80±17),(84±16)and(57±13)/HPF for the 3 groups respectivelv.There wag significant difference among them(F=8.70,P＜0.01).111e value of MVD in the TACE combined with endestatin group was the lowest, and there were significant differences when compared with the control group (q=4.63, P＜0.01) and the TACE group (q =5.48, P＜0.01).There was no significant difference between the control group and the TACE group (q = 0.85, P ＞ 0.05) in MVD.Conclusion Compared with chemoembolization only, ehemoembolization combined with endostatin can significantly depress the expression of VEGF and decrease the angiogenesis of the tumor.The combined method has a beneficial effect on prognosis of hepatic tumor.