出 处:《中华实验外科杂志》2017年第1期9-13,共5页Chinese Journal of Experimental Surgery
基 金:国家自然科学基金(81272710、30801092)
摘 要:目的 利用人类全转录组基因芯片技术检测人SW620结肠癌细胞组织因子/活性凝血因子Ⅶ(TF/FⅦa)通路激活后表达谱改变,探讨该通路下游机制。方法 提取TF/FⅦa通路活化组与空白对照组的人结肠癌SW620细胞总RNA进行全转录组基因芯片杂交,筛选差异表达基因,实时定量反转录聚合酶链反应(RT-qPCR)验证结果,进行差异基因及相关通路网络分析;RT-qPCR检测结肠癌细胞SW620、SW480、LoVo、HCT116的TF/FⅦa通路活化后表皮生长因子受体(EGFR)配体双调蛋白(AREG)、表皮调节素(EREG)、肝素结合表皮生长因子(HB-EGF)、转化生长因子-α(TGF-α)、β-细胞素(BTC)、表皮生长因子(EGF)、上皮细胞有丝分裂蛋白(EPGN)的基因表达改变。结果TF/FⅦa通路活化组较对照组上/下调≥1.5倍的基因共263个,其中上调150个,下调113个;网络分析提示层粘连蛋白-整合素系统、糖代谢通路网络和恶性肿瘤通路网络与TF/FⅦa通路活化密切相关;SW620细胞TF/FⅦa通路活化后EGFR配体AREG、EREG、HB-EGF、TGF-α基因表达呈时间依赖的上调趋势,于12 h达峰值,相对表达量分别为0.92±0.13比5.50±0.91(P=0.000),1.00±0.15比2.17±0.44(P=0.002),1.11±0.08比1.73±0.32(P=0.005),0.94±0.12比1.49±0.09(P=0.002);TF/FⅦa通路活化6 h,SW480细胞的AREG、BTC基因表达显著上调,相对表达量分别为1.00±0.25比2.19±0.60(P=0.033),1.00±0.23比4.41±0.56(P=0.001),EPGN基因未检测到;LoVo细胞的AREG、BTC显著上调,EGF显著下调,分别为1.00±0.19比1.87±0.39(P=0.025),1.00±0.01比1.86±0.06(P=0.000),1.00±0.08比0.68±0.16(P=0.035);HCT116细胞的AREG、EREG、HB-EGF、TGF-α、EGF均显著上调,分别为1.00±0.09比1.38±0.06(P=0.004),1.00±0.02比1.14±0.03(P=0.003),1.00±0.03比1.85±0.11(P=0.000),1.00±0.05比1.26±0.10(P=0.015),Objective To detect the expression profile changes of human colon cancer cell SW620 when its tissue factor/active coagulation factor VII (TF/FⅦa) pathway is activated and discover new down- stream effeetors of TF/FⅦa pathway. Methods Total RNAs of two groups of SW620 cells ( treated with 100 nmol/L FⅦa for 24 h in treament group and identical volume of phosphate - buffered saline in control group) were extracted and hybridization was performed on gene chips. Differentially expressed genes were screened and part of the gene expressions were verified using real - time reverse transeriptase - polymerase chain reaction ( RT - qPCR) , network of differentially expressed genes and pathways were analysed. Gene expressions of epidermal growth factor receptor (EGFR) ligands amphiregulin (AREG), epiregulin (EREG), Heparin - binding EGF - like growth factor ( HB - EGF ), transforming growth factor - α (TGF - α), β - cellulin ( BTC), epidermal growth factor (EGF) and epigen (EPGN) were detected by RT -qPCR following activation of TF/FⅦa pathway of SW620, SW480, LoVo and HCT116 cells. Results There were 263 differentially expressed genes with a test/control fold change of ≥ 1.5 (150 upregulated,113 downregulated). Network analysis showed that genes of laminin -integrin system, pathways of glyco- metabolism and cancer related pathways were associated with TF/FⅦ a signalling' s activation. Gene ex- pressions of AREG, EREG, HB - EGF and TGF - α of SW620 were upregulated in a time - dependent manner and reached peaks at 12 h, relative gene expressions of control group vs treatment group were 0.92±0. 13 vs. 5.50±0.91(P=0.000), 1.00 ±0. 15 vs. 2. 17 ±0.44(P=0.002) , 1.11 ±0.08 vs. 1.73 ±0. 32(P =0. 005), 0. 94±0. 12 vs. 1.49±0. 09(P =0. 002). When TF/FⅦa pathway was activated for 6 h, in SW480 cells, gene expressions of AREG and BTC were significantly upregnlated, relative expressions were 1.00±0. 25 vs. 2. 19 ±0. 60(P =0. 033), 1.00 �
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