摘要
目的:探讨组织因子促进人类大肠癌细胞侵袭的机制,研究其与MMP 2和MMP 9的相关性。方法:获取转染正义/反义TFcDNA的人类大肠癌HT 29细胞系/LoVo细胞系裸鼠皮下种植瘤标本,应用Westernblot和RT PCR技术,检测转染组和对照组肿瘤组织中MMP 2和MMP 9的蛋白和mRNA表达水平;同时采用明胶酶谱法检测转染反义LoVo细胞系培养上清中的MMP 2和MMP 9活性的变化。结果:与对照组相比较,转染正义TFcDNA的HT 29细胞系成瘤标本TF表达升高,其所对应的MMP 9和MMP 2蛋白水平和mRNA水平表达也明显升高; 转染反义TFcDNA的LoVo细胞系成瘤标本中的TF,MMP 9和MMP 2蛋白和mRNA水平表达明显低于对照组,转染反义TFcDNA的LoVo细胞系培养上清液中的MMP 9和MMP 2活性较对照组低;MMP 9和MMP 2表达与组织因子表达具有相关性。结论:组织因子促进人类大肠癌细胞的侵袭,其部分机制可能与组织因子上调MMP 9和MMP 2的表达有关,组织因子可能是大肠癌细胞分泌MMPs的内在激动剂。
Objective: To investigate the role of tissue factor expression in the invasive ability of human colon carcinoma cells and to analyze the correlation between tissue factor and MMP-2 and MMP-9. Methods: HT-29 cells with sense-TFcDNA transfection and LoVo cells with antisense-TFcDNA transfection were implanted subcutaneously into nude mice as well as controls. The expressions of MMP-9 and MMP-2 at the protein and mRNA levels were detected by Western blot and RT-PCR respectively; Gelatin zymography was used for assay of the MMP-9 and MMP-2 activiies in the supernatant cultured media of LoVo cells with antisense-TFcDNA transfection and controls. Results: The expressions of MMP-9 and MMP-2 at the protein and mRNA levels in the group of HT-29 cells with sense-TFcDNA were significantly increased with untransfected HT-29 cells.The expression in the group of LoVo cells with antisense- TFcDNA had a significant decrease than that of the controls.The MMP-9 and MMP-2 activities of LoVo cells with antisense-TFcDNA were weakened because of the lower expression of tissue factor by gelatin zymography. The expression of MMP-9 and MMP-2 were closely correlated to the expression of tissue factor. Conclusion: Tissue factor can increase the invasive ability of human colon carcinoma cells. The partial mechanism is that TF can upregulate the expressions of MMP-9 and MMP-2.Tissue factor may be an inner agonist in the secrection of MMPs in colon carcinoma cells.
出处
《北京大学学报（医学版）》
CAS
CSCD
北大核心
2005年第3期265-268,共4页
Journal of Peking University:Health Sciences
基金
国家自然科学基金(30471683)
教育部科学技术研究重点项目资助(02003 )~~
