腺病毒介导血管内皮生长因子启动子驱动的胸苷激酶及胞苷脱氨酶融合基因系统与碘油混合栓塞治疗兔肝癌的实验研究

目的评价携带血管内皮生长因子(VEGF)启动子调控的胸苷激酶(TK)及胞苷脱氨酶(CD)融合双自杀基因重组腺病毒系统(AdVEGF-CDglyTK)与超液化碘油混合栓塞兔肝癌后的治疗效果及安全性。36只荷VX2瘤兔随机分4组,LP组(单纯超液化碘油栓塞组);LP+AdVEGF-CDglyTK组(超液化碘油+AdVEGF-CDglyTK栓塞混合栓塞,介入术后腹腔注射GCV+5-FC治疗组);AdVEGF-CDglyTK组(单纯灌注AdVEGF-CDglyTK,介入术后腹腔注射GCV+5-FC治疗组);NS组(生理盐水治疗组)。于术前及术后第10、15天行磁共振成像(MRI)检查观察肿瘤的体积,免疫组织化学法检测肿瘤组织VEGF的表达及微血管密度(MVD)。结果4组兔术前肿瘤体积差异无统计学意义(P>0.05);介入治疗后10、15d的各组之间肿瘤增长率差异均有统计学意义(P<0.05),LP+AdVEGF-CDglyTK肿瘤增长率最小。VEGF表达:LP组表达最高,差异有统计学意义(P<0.05)。MVD表达:LP组最高,LP+AdVEGF-CDglyTK组最低(P<0.05),而AdVEGF-CDglyTK组MVD表达也低于NS组,差异有统计学意义(P<0.05)。结论在对兔肝癌的治疗中,与单纯碘油栓塞以及单纯灌注AdVEGF-CDglyTK相比,AdVEGF-CDglyTK与碘油混合肝动脉栓塞可以明显降低肿瘤的生长率,减少肿瘤组织VEGF的表达及减少肿瘤新生血管生成。

The effects of recombinant adenovirus CD/TK fusion gene driven by vascular endothelial growth factor prompter with lipiodol on rabbit liver neoplasms

Objective To investigate the therapeutic effects of recombinant adenovirus CD/TK fusion gene driven by vascular endothelial growth factor(VEGF) prompter(AdVEGF-CDglyTK system) with lipiodol on rabbit liver neoplasms.Methods The rabbit VX2 liver carcinoma models were established,and were randomly divided into 4 groups:simply using ultra-fluid lipiodol(LP group,n=9);AdVEGF-CDglyTK mixed with ultra-fluid lipiodol were infused into the hepatic artery,then Ganciclovir(GCV)and 5-flucytosine(5-FC)were injected int...