摘要
目的:比较α1,2岩藻糖转移酶基因转染前后卵巢癌细胞株RMG-I的裸鼠体内致瘤性及移植瘤组织血管内皮生长因子及其受体VEGFR1和VEGFR2表达的变化。方法:利用已建立的Lewisy抗原稳定高表达卵巢癌细胞株RMG-I-H及转染前细胞株RMG-I为细胞模型,将转染前后细胞株种植裸鼠皮下建立人卵巢癌裸鼠移植瘤模型,观察两组肿瘤生长情况。第5周处死动物,测量移植瘤重量,免疫组织化学方法检测肿瘤组织VEGF及VEGFR1、VEGFR2的表达。结果:转染组及未转染组裸鼠均有荷瘤形成,但转染组的成瘤时间(5.2±0.8d)早于未转染组(8.8±1.3d),且转染组的瘤重和体积与未转染组相比均明显增加(P<0.05)。转染组裸鼠移植瘤组织VEGF及VEGFR2表达量明显高于未转染组(P均<0.05)。结论:Lewisy抗原高表达能增加卵巢癌RMG-I细胞的体内致瘤性,上调裸鼠移植瘤VEGF及VEGFR2的表达。提示Lewisy抗原能提高癌细胞的恶性程度,且该作用与VEGF及VEGFR2表达增高关系密切。
Objective:To compare the tumorigenicity in vivo of cells with or without transfection of α1,2-fucosyltransferase gene and changes of expression of vascular endothelial growth factor and vascular endothelial growth factor receptors VEGFR1 and VEGFR2 in transplanted tumor tissue.Methods:Nude mice were subcutaneously injected with RMG-I-H cells that stably express Lewis y antigen at high levels,RMG-I cells as control.After five weeks,animals were killed.Tumorigenicity was monitored and compared among the animals.Expression of VEGF,VEGFR1 and VEGFR2 in tumor tissue was detected by immunohistochemistry.Results:Nude mice in both groups had subcutaneous tumor formation,but the time of tumor formation (5.2 ± 0.8 d) in transfected group was earlier than that of non-transfected group (8.8 ± 1.3 d),and the weight and volume of tumors in transfected group were also significantly increased compared with non-transfected group (P〈0.05).Expression of VEGF and VEGFR2 in transplanted tumor tissue in transfection group was significantly higher than that in non-transfected group (P〈0.05).Conclusion:Lewis y antigen high expression can enhance the tumorigenicity in vivo of RMG-I cells and up-regulate the expression of VEGF and VEGFR2 in transplanted tumor tissue.These results suggest that Lewis y antigen can enhance the degree of malignancy of cancer cells,and this is closely related to the high expression of VEGF and VEGFR2.
出处
《现代肿瘤医学》
CAS
2010年第9期1707-1711,共5页
Journal of Modern Oncology
关键词
卵巢癌
Lewisy抗原
血管内皮生长因子
血管内皮生长因子受体
小鼠
ovarian cancer
Lewis y antigen
vascular endothelial growth factor
vascular endothelial growth factor receptor
nude mice