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.
Journal Article (Journal Article)
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.
Full Text
Duke Authors
Cited Authors
- Lakka, SS; Jasti, SL; Kyritsis, AP; Yung, WK; Ali-Osman, F; Nicolson, GL; Rao, JS
Published Date
- 2000
Published In
Volume / Issue
- 18 / 3
Start / End Page
- 245 - 252
PubMed ID
- 11315098
International Standard Serial Number (ISSN)
- 0262-0898
Digital Object Identifier (DOI)
- 10.1023/a:1006724826083
Language
- eng
Conference Location
- Netherlands