COX-2抑制剂(NS-398)对结肠癌HT-29细胞体外侵袭力的作用及CD44v6、nm23-H1基因的调节

目的：研究NS-398对结肠癌HT-29细胞体外侵袭力的作用及CD44v6、nm23-H1基因的调节。 方法： 通过流式细胞仪检测COX-2和CD44v6的表达，MTT检测细胞活性，改良的Boyden小室法观察HT-29细胞侵袭重组基底膜的能力，RT-PCR观察nm23-H1 mRNA的表达。 结果： HT-29细胞COX-2表达阳性，0.1、1.0、10 μmol/L NS-398可显著抑制HT-29细胞侵袭重组基底膜的能力，且上述作用与NS-398的毒性作用无关。NS-398可下调CD44v6的表达，上调nm23-H1 mRNA的表达。 结论： NS-398具有抑制结肠癌细胞HT-29体外侵袭力的作用，下调CD44v6的表达和上调nm23-H1 mRNA的表达可能是其作用机制。

Effect of NS-398 on invasion of colon cancer HT-29 cells in vitro and its regulation by CD44v6 and nm23-H1 genes

AIM: To study the anti-invasive effect of NS-398 on colon cancer cell line HT-29 in vitro an its regulation by CD44v6 and nm23-H1 genes. METHODS: Flow cytometry was used to detect the expression of COX-2 and CD44v6 in HT-29 cells. MTT was used for cell survival rate tests. The modified Boyden chamber model was used for quantitative invasion assay. RT-PCR was used to detect the expression of nm23-H1 mRNA. RESULTS: Flow cytometry analysis showed that COX-2 was positive in HT-29 cells. NS-398 had significant inhibitory effects on invasion of HT-29 cells, which had no relation with its cytotoxicity. NS-398 down-regulated the expression of CD44v6 and up-regulated the expression of nm23-H1 mRNA. CONCLUSION: NS-398 has an anti-invasive effect on HT-29 cells in vitro. Down-regulation of CD44v6 and up-regulation of nm23-H1 may be its underlying mechanisms.