Regulation of MMP-9 (type IV collagenase) production and invasiveness in gliomas by the extracellular signal-regulated kinase and jun amino-terminal kinase signaling cascades.
Our previous studies have shown that MMP-9 levels are significantly elevated during the progression of human gliomas. In the current study, we examined the role of JNK- and ERK-dependent signaling modules in the regulation of MMP-9 production and the invasive behavior of the human glioblastoma cell line SNB19, in which JNK/ERK1 is constitutively activated. SNB19 cells that were transfected with dominant-negative JNK, MEKK, and ERK1 expression vectors showed reduced MMP-9 promoter activity. In addition, conditioned medium collected from SNB19 cells transfected with these expression vectors showed diminished MMP-9 activity in the presence of phorbol myristate acetate, as determined by gelatin zymography. The cotransfection of SNB19 cells with kinase-deficient c-raf also diminished MMP-9 promoter activity. Further, in the presence of a specific inhibitor of MEKK (PD098059), the Matrigel invasion assay showed the invasiveness of dominant-negative SNB19 cells transfected with dominant-negative JNK1 or ERK1 to be remarkably reduced. In conclusion, our studies showed for the first time that MMP-9 production and the invasive behavior of SNB 19 cells are regulated by JNK- and ERK-dependent signaling modules and that interfering with either of the pathways reduces invasiveness.
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- Tumor Cells, Cultured
- Transcriptional Activation
- Signal Transduction
- Promoter Regions, Genetic
- Oncology & Carcinogenesis
- Mitogen-Activated Protein Kinases
- Mitogen-Activated Protein Kinase 3
- Matrix Metalloproteinase 9
- JNK Mitogen-Activated Protein Kinases
- Humans
Citation
Published In
DOI
ISSN
Publication Date
Volume
Issue
Start / End Page
Location
Related Subject Headings
- Tumor Cells, Cultured
- Transcriptional Activation
- Signal Transduction
- Promoter Regions, Genetic
- Oncology & Carcinogenesis
- Mitogen-Activated Protein Kinases
- Mitogen-Activated Protein Kinase 3
- Matrix Metalloproteinase 9
- JNK Mitogen-Activated Protein Kinases
- Humans