The involvement of phosphatidylinositol 3 (PI 3)-kinase in the signalling pathways leading to MMP-9 expression in glioma cells remains unclear. Here, we report that PI 3-kinase inhibits MMP-9 expression induced by either IL-1 or TNF-α in rat C6 glioma cells. Using zymography and semi-quantitative RT-PCR analysis, we showed that treatment of C6 cells with wortmannin, an inhibitor of PI 3-kinase activity,...
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