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Expressions of matrilysin and stromelysin in human glioma cells
1Department of Neurosurgery, Hyogo College of Medicine, Japan.
Abstract:
Production of matrilysin and stromelysin by five human glioma cell lines was investigated by Northern blot and immunoblot analyses. Four cell lines constitutively produced matrilysin. Its production was stimulated by phorbol-12-myristate-13-acetate (PMA) in two cell lines and by transforming growth factor-beta 1 (TGF-beta 1) in two other cell lines. Stromelysin transcript was constitutively expressed in only two cell lines, but enhanced or induced by PMA in four cell lines. These results suggest that these enzymes, especially matrilysin, may be involved in the invasive growth of neoplastic glial cells.
Insights
Matrilysin and stromelysin enzymes were studied in human glioma cells. Results suggest matrilysin may play a role in the invasive growth of brain tumors.
Area of Science:
- Biochemistry
- Molecular Biology
- Oncology
Background:
- Gliomas are primary brain tumors with invasive growth patterns.
- Matrix metalloproteinases (MMPs) are implicated in tumor invasion and metastasis.
- Matrilysin (MMP-7) and stromelysin (MMP-3) are MMPs that degrade extracellular matrix components.
Purpose of the Study:
- To investigate the production of matrilysin and stromelysin in human glioma cell lines.
- To determine the regulatory factors influencing the expression of these enzymes in glioma cells.
Main Methods:
- Northern blot analysis to detect mRNA expression of matrilysin and stromelysin.
- Immunoblot analysis to detect protein levels of matrilysin and stromelysin.
- Treatment of cell lines with phorbol-12-myristate-13-acetate (PMA) and transforming growth factor-beta 1 (TGF-beta 1) to assess regulatory effects.
Main Results:
- Four out of five human glioma cell lines constitutively produced matrilysin.
- Matrilysin production was stimulated by PMA in two cell lines and by TGF-beta 1 in two other cell lines.
- Stromelysin transcript was constitutively expressed in two cell lines and induced or enhanced by PMA in four cell lines.
Conclusions:
- Glioma cells express matrilysin and stromelysin.
- Matrilysin, in particular, may be involved in the invasive growth of neoplastic glial cells.
- These enzymes represent potential therapeutic targets for inhibiting glioma invasion.