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Matrix-metalloproteinases in bronchopulmonary carcinomas
C Martinella-Catusse1, B Nawrocki, C Gilles
1I.N.S.E.R.M. U. 514, Reims, France.
Abstract:
Matrix metalloproteinases (MMPs) represent a group of enzymes involved in the degradation of most of the components of the extracellular matrix and therefore participate in tumoural invasion. MMPs, especially gelatinases A and B, MT1-MMP, the activator of gelatinase A, and stromelysin-3 were found overexpressed in many cancers including bronchopulmonary carcinomas. In vivo observations revealed that fibroblasts are the principal source of production of MMPs. Some of these enzymes such as MT1-MMP and stromelysin 3, displayed a focal stromal localisation near preinvasive and invasive tumour clusters. Furthermore, some tumour cell lines were shown to stimulate the expression of MT1-MMP by fibroblasts. All these in vivo and in vitro results suggest that certain tumour cells produce diffusible factors which could influence the MMP stromal expression. Among these factors, the TCSF (Tumor Collagenase Stimulatory Factor) which is known to upregulate some MMPs in vitro could be a good candidate for this stromal regulation, since it is produced by bronchial tumour cells in vivo. In this review, we address such a cooperation between tumour and stromal cells for the production of MMPs and emphasize their necessity for tumoural progression in bronchopulmonary carcinomas.
Insights
Matrix metalloproteinases (MMPs) are crucial for tumor invasion. Tumor cells may stimulate fibroblasts to produce MMPs, aiding cancer progression in bronchopulmonary carcinomas.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Matrix metalloproteinases (MMPs) degrade extracellular matrix, facilitating tumor invasion.
- MMPs like gelatinases, MT1-MMP, and stromelysin-3 are overexpressed in bronchopulmonary carcinomas.
- Fibroblasts are primary producers of MMPs in vivo.
Purpose of the Study:
- To review the role of MMPs in bronchopulmonary carcinomas.
- To explore the tumor-stromal cell cooperation in MMP production.
- To identify potential factors regulating stromal MMP expression.
Main Methods:
- Review of in vivo and in vitro studies on MMPs in cancer.
- Analysis of MMP expression and localization in tumor microenvironments.
- Investigation of tumor cell-derived factors influencing stromal MMPs.
Main Results:
- MMPs, particularly gelatinases, MT1-MMP, and stromelysin-3, are upregulated in lung cancers.
- MT1-MMP and stromelysin-3 show specific stromal localization near tumors.
- Tumor cells can stimulate fibroblast MMP expression via diffusible factors.
- Tumor Collagenase Stimulatory Factor (TCSF) is a potential mediator of this stromal regulation.
Conclusions:
- Tumor and stromal cells cooperate in MMP production, essential for tumor progression.
- Understanding this crosstalk is vital for developing targeted therapies for bronchopulmonary carcinomas.
- MMPs and their regulatory factors represent key targets in lung cancer treatment.