肿瘤相关巨噬细胞对非小细胞肺癌MCP-1、MIP-1的影响

目的 观察肿瘤相关巨噬细胞(TAMs)U937和非小细胞肺癌细胞(NSCLC)A549在体外不同的共培养条件下,对单核细胞趋化蛋白-1(MCP-1)、巨噬细胞炎性蛋白-1(MIP-1)表达的影响.方法 采用Jeremy培养方法,分为三组:1组用不同浓度的U937细胞与A549细胞共培养24h;2组同浓度的U937细胞与A549细胞共培养不同时间;3组用A549在不同时间段单独培养,采用原位杂交方法分别检测三组A549细胞中MCP-1、MIP-1mRNA表达情况.结果 随着U937细胞浓度逐渐增高以及共培养时间的逐渐延长,癌细胞A549中MCP-1、MIP-1mRNA表达的阳性系数均值也相应地增高,明显高于U937细胞浓度为0×105/ml的共培养组以及各时段对照组(均P<0.05).结论 TAMs细胞U937和NSCLC细胞A549的相互作用,与A549细胞MCP-1,MIP-1mRNA的阳性表达密切相关,并存在着浓度和时间的依从性.

Influence of TAMs on monocyte chemoattractant protein-1 and macrophage inflammatory protein-1 in NSCLC

Objective To observe cocultured TAMs cell U937 and NSCLC cell A549 effecting on MCP-1, MIP-1 expression under different conditions in vitro. Methods The cell UM937 of different concentrations (0,1,2,4,8×105/ml) was respectively selected to coculture with the cell A549 0f certain concentration (1.0×105/ml) for 24 hours, in situ hybridization was carried out to detect MCP-1, MIP-1mRNA positive expressions in cell A549 of every concentration group. Under the condition that both concentrations of cell A549 and cell U937 are l.0×105/ml, the same method was used to measure MCP-1, MIP-1mRNA positive expressions in cell A549 in different periods (4h, 8h, 16h, 32h, 48h). Results The positive expression ratios of MCP-1, MIP-1mRNA in cell A549 significantly increased along with addition of the cell U937 concentration and delay of the cocultural time, apparently higher than that of primary cocultured group that the cell U937 was 0×105/ml and that of contrast group at every period (all P<0.05). Conclusion The mutual interaction between TAMs and NSCLC cells has closely positive correlation with MCP-1, MIP-1mRNA positive expressions in cell A549, and depends on cocultural concentration and time.