JAK2激酶抑制剂AG490对胃癌细胞侵袭的影响

Janus kinase inhibitor AG490 inhibits gastric cancer cell invasiveness by down-regulation of MMPs and up-regulation of TIMPs

目的 观察JAK2激酶抑制剂AG4 90对胃癌细胞侵袭以及对基质金属蛋白酶类(MMPs)、组织型基质金属蛋白酶抑制物 (TIMPs)表达的影响 ,探讨STAT3信号转导通路在胃癌侵袭转移调控中的作用。方法 应用JAK2激酶抑制剂AG4 90处理胃癌BGC 82 3细胞 ,Matrigel肿瘤体外侵袭模型检测肿瘤细胞侵袭 ;Westernblot检测STAT3、MMP 2、MMP 9蛋白表达及活性 ;RT PCR检测MMPs、TIMPsmRNA的表达。结果 AG4 90可抑制JAK2 /STAT3信号转导通路活化及胃癌BGC 82 3细胞侵袭 ,在此过程中AG4 90在mRNA和蛋白水平抑制MMP 2和MMP 9表达 ,同时上调TIMP 1、TIMP 2mRNA的表达。结论 STAT3信号转导通路参与胃癌细胞侵袭调控 ,阻断STAT3通路活化可以抑制胃癌细胞侵袭 ,这一作用可能是通过抑制MMP 2和MMP 9表达以及上调TIMP 1和TIMP 2表达实现的。

Objective This study was to investigate the role of STAT3 signaling pathway in gastric cancer invasiveness. Methods Janus kinase 2 selective inhibitor AG490 was used to inhibit the activation of STAT3 signaling pathway. Matrigel-coated transwell was employed to estimate the invasiveness of BGG-823 cells. Alterations in the activity of STAT3 and expression of MMPs and TIMPs were measured by Western blot and RT-PCR. Results The activation of STAT3 signaling pathway was suppressed by AG490. AC490 significantly decreased the invasiveness of gastric cancer cell line BGC-823 through Matrigel-coated filters. Decreased invasion was associated with the inhibition of MMP-2, and MMP-9 at both mRNA and protein levels by RT-PCR and Western blot. Meanwhile, the expression of TIMP-1, and TIMP-2 were up-regulated at mRNA levels. Conclusion Inhibition of STAT3 signaling pathway in AG490 suppresses gastric cancer cell invasiveness through down-regulation of several invasion-related factors including MMP-2, and MMP-9 and up-regulation of their inhibitors.