前列腺素E2对结肠癌SW480细胞生物学行为的影响

Influence of PGE2 on biological behavior of colorectal cancer cells SW480

目的 研究前列腺素E2(PGE2)对结肠癌SW480细胞黏附、迁移、侵袭能力的影响及其可能的分子机制.方法 分别使用外源性PGE2及其受体EP1的拮抗剂SC19220作用于SW480细胞后,MTr法测定肿瘤细胞黏附能力,transwell小室检测细胞迁移及侵袭能力,RT-PCR及Western blotting检测血管内皮生长因子(VEGF)mRNA和蛋白水平的改变.结果 外源性PGE2可以显著增加SW480细胞黏附、迁移及侵袭能力,PGE2作用于细胞后,黏附细胞A值由0.207±0.009增加至0.417±0.088,迁移细胞由6.33±0.33增加至43.33±0.88,侵袭细胞由3.67±0.34增加至26.33±0.89,差异均有统计学意义(P＜0.05).SC19220可抑制PGE2所诱导的SW480细胞黏附、迁移及侵袭,PGE2+SC19220组与PGE2组相比,黏附细胞A值由0.417±0.088下降至0.140±0.006,迁移细胞由43.33±0.88下降至28.00±0.58,侵袭细胞由26.33±0.89下降至5.67±0.33,差异均有统计学差异(P＜0.05).RT-PCR及Western blotting检测结果显示,PGE2作用后SW480细胞VEGFmRNA及蛋白水平表达增强,且表达量与PGE2浓度呈正相关.结论 PGE2可显著增加SW480细胞黏附、迁移及侵袭能力,其作用过程可能与VEGF表达上调相关.

Objective To investigate whether prostaglandin E2(PGE2) can promote the ability of adhesion.migration and invasion of colorectal cancer cells SW480 and its mechanism.Methods Extrinsic source PGE2 and the antagonist of EP1 SC19220 were added to the culture media. MTr assay was used to identify the adhesion ability of SW480 cells. Migration ability was tested by transwell plate.The invasion ability was tested bv ECM gel coated transweU plate. RT-PCR and western blotting were used to detect the mRNA and protein level of vascular endothelial growth factor (VEGF). Results The adhesion.invasion and migration ratio of SW480 ceils were all increased significantly after treated with PGEh the A values of adhesion ceils increased from 0.207±0.009 to 0.417±0.088. Migration cells increased from 6.33±0.33 to 43.33±0.88.invasion cells increased from 3.67±0.34 to 26.33±0.89(P＜0.05).The adhesion.migration and invasion cells of PGE2+SC 19220 group decreased significantly compared to PGE2 group.The A values of adhesion cells decreased from 0.417±0.088 to 0.140±0.006. Migration cells decreased from 43.33±0.88 to 28.00±0.58.invasion cells decreased from 26.33±0.89 to 5.67±0.33 (P＜0.05).The results of RT-PCR and western blotting showed that the expression of VEGF mRNA and protein increased in a dose dependent manner after PGE2 treatment. Conclusion The ability of adhesion. Migration and invasion of SW480increased after PGE2 was added to the culture media.It may be related to the upregulation of VEGF.