title: Modulation of MMP-2 and MMP-9 by cytokines, mitogens and inhibitors in lung cancer and malignant mesothelioma cell lines.
abstract: Matrix metalloproteinases (MMPs) secreted by lung cancer (LC) and malignant mesothelioma (MM), especially MMP-2 and MMP-9, play crucial roles in tumor invasion and metastasis. We examined the effect of cytokines, mitogens and inhibitors on MMP-2 and MMP-9 expression in LC and MM cell lines. Human LC (A-549) and MM (MSTO-211H) cell lines were cultured in appropriate media. At near confluence, the cells were washed with PBS and incubated in serum-free medium with various concentrations of several cytokines, mitogens and inhibitors. After 24 h the media were removed and analyzed for MMP-2 and MMP-9 by gelatinase zymography and quantitated by densitometry. LC expressed MMP-2 whereas MM expressed MMP-2 and MMP-9. TNF-alpha, IL-1beta, LPS and PMA, stimulated MMP-2 in LC and inhibited MMP-2 in MM, but had no effect on MMP-9. Doxycycline, EGCG and NM inhibited MMP-2 and MMP-9 expression, in both cell lines. Actinomycin-D, cyclohexamide, retinoic acid and dexamethasone inhibited MMP-2 in both cancer cell lines and inhibited MMP-9 in MM. Our results show that cytokines and inhibitors have an up- or down-regulatory effect on MMP-2 and MMP-9 expression in LC and MM, suggesting the clinical value of targeting these proteases for management of LC and MM and their pathogenesis.
authors.affiliation: Dr Rath Research Institute, Santa Clara, CA 95050, USA.
authors.forename: M W
authors.initials: MW
authors.lastname: Roomi
authors.forename: Julio C
authors.initials: JC
authors.lastname: Monterrey
authors.forename: Tatiana
authors.initials: T
authors.lastname: Kalinovsky
authors.forename: Aleksandra
authors.initials: A
authors.lastname: Niedzwiecki
authors.forename: Matthias
authors.initials: M
authors.lastname: Rath
mesh_terms: D000970:Antineoplastic Agents / Q000494:pharmacology; D045744:Cell Line, Tumor; D003470:Culture Media / Q000494:pharmacology; D016207:Cytokines / Q000378:metabolism; D015971:Gene Expression Regulation, Enzymologic; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D008070:Lipopolysaccharides / Q000494:pharmacology; D008175:Lung Neoplasms / Q000378:metabolism* / Q000473:pathology; D020778:Matrix Metalloproteinase 2 / Q000378:metabolism*; D020780:Matrix Metalloproteinase 9 / Q000378:metabolism*; D008654:Mesothelioma / Q000378:metabolism* / Q000473:pathology; D009362:Neoplasm Metastasis; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology; D013997:Time Factors
chemical_list: D000970:Antineoplastic Agents; D003470:Culture Media; D016207:Cytokines; D008070:Lipopolysaccharides; D020778:Matrix Metalloproteinase 2; D020780:Matrix Metalloproteinase 9; D013755:Tetradecanoylphorbol Acetate