内皮祖细胞携带KAI1/CD82基因对人鼻咽癌细胞裸鼠模型肺转移的影响

摘要

Purpose To clarify the role of KAI1/CD82 in metastasis of nasopharyngeal carcinom and to evaluate the clinical efficacy of KAI1/CD82-expressing EPCs in the prevention of nasopharyngeal carcinoma.Method Umbilical vein-derived EPCs were infected with KAI1/CD82-expressing lenti-virus to get a KAI1/CD82-overexpressing EPC cell line (KAI1/CD82-EPCs).A xenograft mouse model of human nasopharyngeal carcinoma was established,and KAI1/CD82-EPCs were injected through the tail vein.The effect of the KAI1/CD82-EPCs on growth and metastasis of the xenograft was observed.Results Time required for tumor formation was 14.70 ± 3.81,15.05 ±3.85,14.20 ± 3.55 days respectively for the EPCs,EPCs-NC,and KAI1/CD82-EPCs groups,with no significant difference among the three groups (P =0.771).Weight of the xenograft was (1.388 ±0.204) g,(1.487 ±0.223) g,(1.485 ±0.234) g respectively for the EPCs,EPCs-NC,and KAI1/CD82-EPCs groups,with no significant difference (P =0.274).Rate of lung metastasis was 55％,45％ and 10％ for the EPCs,EPCs-NC,and KAI1/CD82-EPC groups,and the difference was significant (P =0.005).Number of metastatic lesions was 34.27 ± 5.35,38.44 ± 9.63,17.50 ± 3.54 for the three groups,and the difference was also significant (P =0.007).Immunohistochemistry indicated positive KAI1/CD82 expression in metastatic lesion of the KAI1/CD82-EPCs group,but no KAI1/CD82 expression in the EPCs group or EPCs-NC group.Conclusion KAI1/CD82-expressing EPCs inhibits lung metastasis of the xenograft mouse model of human nasopharyngeal carcinoma.%目的 探讨KAI1/CD82基因在鼻咽癌侵袭转移中的作用,分析转染KAI1/CD82基因的内皮祖细胞在鼻咽癌防治中的应用价值.方法 应用过表达KAI1/CD82基因的慢病毒转染血管内皮祖细胞,获得高表达KAI1/CD82基因的稳转细胞(KAI1/CD82-EPCs);构建荷人鼻咽癌裸鼠移植瘤模型,通过裸鼠尾静脉注入KAI1/CD82-EPCs;观察KAI1/CD82-EPCs对裸鼠腋下移植瘤及其转移灶的影响.结果 EPCs组、空白组和KAI1/CD82-EPCs组成瘤时间(天)分别为14.70 ±3.81、15.05±3.85、14.20±3.55,差异无统计学意义(P =0.771);EPCs组、空白组和KAI1/CD82-EPCs组移植瘤的重量(g)分别为1.388±0.204、1.487±0.223、1.485±0.234,差异无统计学意义(P=0.274);EPCs组、空白组和KAI1/CD82-EPCs组肺转移灶生成率分别为55％、45％和10％,差异具有统计学意义(P=o.005),三组肺脏的转移灶数目分别为34.27±5.35、38.44±9.63、17.50±3.54,差异具有统计学意义(P=0.007);注射KAI1/CD82-EPCs的实验组肺转移灶KAI1/CD82呈阳性,EPCs组和空白组肺转移灶KAI1/CD82呈阴性.结论 转染KAI1/CD82基因的EPCs对鼻咽癌裸鼠模型的肺转移具有抑制作用.