AIM To investigate the underlying mechanism by which CXCL12 and CXCL6 influences the metastatic potential of colon cancer and internal relation of colon cancer and stromal cells. METHODS Western blotting was used to d...AIM To investigate the underlying mechanism by which CXCL12 and CXCL6 influences the metastatic potential of colon cancer and internal relation of colon cancer and stromal cells. METHODS Western blotting was used to detect the expression of CXCL12 and CXCL6 in colon cancer cells and stromal cells. The co-operative effects of CXCL12 and CXCL6 on proliferation and invasion of colon cancer cells and human umbilical vein endothelial cells(HUVECs) were determined by enzyme-linked immunosorbent assay,and proliferation and invasion assays. The angiogenesis of HUVECs through interaction with cancer cells and stromal cells was examined by angiogenesis assay. We eventually investigated activation of PI3K/Akt/m TOR signaling by CXCL12 involved in the metastatic process of colon cancer.RESULTS CXCL12 was expressed in DLD-1 cancer cells and fibroblasts. The secretion level of CXCL6 by colon cancer cells and HUVECs were significantly promoted by fibroblasts derived from CXCL12. CXCL6 and CXCL2 could significantly enhance HUVEC proliferation and migration(P < 0.01). CXCL6 and CXCL2 enhanced angiogenesis by HUVECs when cultured with fibroblast cells and colon cancer cells(P < 0.01). CXCL12 also enhanced the invasion of colon cancer cells. Stromal cell-derived CXCL12 promoted the secretion level of CXCL6 and co-operatively promoted metastasis of colon carcinoma through activation of the PI3K/Akt/m TOR pathway.CONCLUSION Fibroblast-derived CXCL12 enhanced the CXCL6 secretion of colon cancer cells,and both CXCL12 and CXCL6 co-operatively regulated the metastasis via the PI3K/Akt/m TOR signaling pathway. Blocking this pathway may be a potential anti-metastatic therapeutic target for patients with colon cancer.展开更多
目的建立弥漫大B细胞淋巴瘤(diffuse large B lymphoma,DLBCL)小鼠模型,在肿瘤发生发展阶段中给予Th17细胞过继免疫治疗,检测肿瘤组织中趋化因子CXCL6/CCL2的表达,了解Th17细胞对DLBCL肿瘤微环境中CXCL6/CCL2表达的影响,及其与DLBCL发...目的建立弥漫大B细胞淋巴瘤(diffuse large B lymphoma,DLBCL)小鼠模型,在肿瘤发生发展阶段中给予Th17细胞过继免疫治疗,检测肿瘤组织中趋化因子CXCL6/CCL2的表达,了解Th17细胞对DLBCL肿瘤微环境中CXCL6/CCL2表达的影响,及其与DLBCL发生发展的相关性。方法人生发中心B细胞(germinal center B cell,GCB)样DLBCL细胞株SUDHL-4进行传代培养后接种10只SCID小鼠建立DLBCL小鼠模型,观察小鼠肿瘤发生发展过程并得出DLBCL小鼠肿瘤中位发病时间T1及小鼠中位生存时间T2。体外培养Th17细胞,在接种肿瘤细胞株时予30只DLBCL小鼠注射Th17细胞行过继免疫,并分别于T0(接种Th17细胞后)、T1和T2这3个时间点处死小鼠,获得A0、A1和A2组,每组10只小鼠。实时定量PCR法检测DLBCL小鼠肿瘤组织CXCL6/CCL2表达,与同一时间点15只小鼠的生理盐水对照组(B0、B1和B2组,每组5只)进行对比,并对比T0、T1和T2这3个时间点各组CXCL6/CCL2的表达。结果 A0组、A1组和A2组CXCL6mRNA表达量分别为0.115±0.021、0.657±0.142和0.935±0.322,差异有统计学意义,F=7.013,P=0.025。B0组、B1组和B2组CXCL6mRNA表达量分别为0.175±0.024、0.321±0.011和0.631±0.027,差异有统计学意义,F=6.007,P=0.008。A0组CXCL6mRNA表达量与B0组对比差异无统计学意义,t=2.03,P=1.25;A1组明显高于B1组,t=6.43,P<0.01;而A2组也明显高于B2组,t=6.35,P<0.01。A0组、A1组和A2组CCL2mRNA表达量分别为0.133±0.015、0.654±0.534和0.928±0.322,差异有统计学意义,F=7.021,P=0.023。B0组、B1组和B2组CCL2mRNA表达量分别为0.124±0.013、0.327±0.025和0.628±0.322,差异有统计学意义,F=6.005,P=0.007。A0组CCL2mRNA表达量与B0组对比差异无统计学意义,t=1.98,P=1.75;A1组明显高于B1组,t=6.13,P<0.01;A2组也明显高于B2组,t=7.59,P<0.01。结论随着DLBCL肿瘤进程,CXCL6和CCL2的表达上升,CXCL6和CCL2可能是影响DLBCL肿瘤发生发展的因子,而Th17过继免疫治疗可以上调DLBCL肿瘤组织CXCL6和CCL2的表达,可能会对DLBCL肿瘤的发生发展产生影响。展开更多
基金Supported by National Natural Science Foundation of China,No.81260325(to Ma JC)
文摘AIM To investigate the underlying mechanism by which CXCL12 and CXCL6 influences the metastatic potential of colon cancer and internal relation of colon cancer and stromal cells. METHODS Western blotting was used to detect the expression of CXCL12 and CXCL6 in colon cancer cells and stromal cells. The co-operative effects of CXCL12 and CXCL6 on proliferation and invasion of colon cancer cells and human umbilical vein endothelial cells(HUVECs) were determined by enzyme-linked immunosorbent assay,and proliferation and invasion assays. The angiogenesis of HUVECs through interaction with cancer cells and stromal cells was examined by angiogenesis assay. We eventually investigated activation of PI3K/Akt/m TOR signaling by CXCL12 involved in the metastatic process of colon cancer.RESULTS CXCL12 was expressed in DLD-1 cancer cells and fibroblasts. The secretion level of CXCL6 by colon cancer cells and HUVECs were significantly promoted by fibroblasts derived from CXCL12. CXCL6 and CXCL2 could significantly enhance HUVEC proliferation and migration(P < 0.01). CXCL6 and CXCL2 enhanced angiogenesis by HUVECs when cultured with fibroblast cells and colon cancer cells(P < 0.01). CXCL12 also enhanced the invasion of colon cancer cells. Stromal cell-derived CXCL12 promoted the secretion level of CXCL6 and co-operatively promoted metastasis of colon carcinoma through activation of the PI3K/Akt/m TOR pathway.CONCLUSION Fibroblast-derived CXCL12 enhanced the CXCL6 secretion of colon cancer cells,and both CXCL12 and CXCL6 co-operatively regulated the metastasis via the PI3K/Akt/m TOR signaling pathway. Blocking this pathway may be a potential anti-metastatic therapeutic target for patients with colon cancer.
文摘目的建立弥漫大B细胞淋巴瘤(diffuse large B lymphoma,DLBCL)小鼠模型,在肿瘤发生发展阶段中给予Th17细胞过继免疫治疗,检测肿瘤组织中趋化因子CXCL6/CCL2的表达,了解Th17细胞对DLBCL肿瘤微环境中CXCL6/CCL2表达的影响,及其与DLBCL发生发展的相关性。方法人生发中心B细胞(germinal center B cell,GCB)样DLBCL细胞株SUDHL-4进行传代培养后接种10只SCID小鼠建立DLBCL小鼠模型,观察小鼠肿瘤发生发展过程并得出DLBCL小鼠肿瘤中位发病时间T1及小鼠中位生存时间T2。体外培养Th17细胞,在接种肿瘤细胞株时予30只DLBCL小鼠注射Th17细胞行过继免疫,并分别于T0(接种Th17细胞后)、T1和T2这3个时间点处死小鼠,获得A0、A1和A2组,每组10只小鼠。实时定量PCR法检测DLBCL小鼠肿瘤组织CXCL6/CCL2表达,与同一时间点15只小鼠的生理盐水对照组(B0、B1和B2组,每组5只)进行对比,并对比T0、T1和T2这3个时间点各组CXCL6/CCL2的表达。结果 A0组、A1组和A2组CXCL6mRNA表达量分别为0.115±0.021、0.657±0.142和0.935±0.322,差异有统计学意义,F=7.013,P=0.025。B0组、B1组和B2组CXCL6mRNA表达量分别为0.175±0.024、0.321±0.011和0.631±0.027,差异有统计学意义,F=6.007,P=0.008。A0组CXCL6mRNA表达量与B0组对比差异无统计学意义,t=2.03,P=1.25;A1组明显高于B1组,t=6.43,P<0.01;而A2组也明显高于B2组,t=6.35,P<0.01。A0组、A1组和A2组CCL2mRNA表达量分别为0.133±0.015、0.654±0.534和0.928±0.322,差异有统计学意义,F=7.021,P=0.023。B0组、B1组和B2组CCL2mRNA表达量分别为0.124±0.013、0.327±0.025和0.628±0.322,差异有统计学意义,F=6.005,P=0.007。A0组CCL2mRNA表达量与B0组对比差异无统计学意义,t=1.98,P=1.75;A1组明显高于B1组,t=6.13,P<0.01;A2组也明显高于B2组,t=7.59,P<0.01。结论随着DLBCL肿瘤进程,CXCL6和CCL2的表达上升,CXCL6和CCL2可能是影响DLBCL肿瘤发生发展的因子,而Th17过继免疫治疗可以上调DLBCL肿瘤组织CXCL6和CCL2的表达,可能会对DLBCL肿瘤的发生发展产生影响。