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Updated: Aug 7, 2026

Experimental Metastasis Assay
Published on: August 24, 2010
Matrix metalloproteinase inhibitors and cancer: trials and tribulations
Lisa M Coussens1, Barbara Fingleton, Lynn M Matrisian
1Department of Pathology and Cancer Research Institute, University of California, 2340 Sutter Street, San Francisco, CA 94143, USA.
Abstract:
For at least 30 years, matrix metalloproteinases (MMPs) have been heralded as promising targets for cancer therapy on the basis of their massive up-regulation in malignant tissues and their unique ability to degrade all components of the extracellular matrix. Preclinical studies testing the efficacy of MMP suppression in tumor models were so compelling that synthetic metalloproteinase inhibitors (MPIs) were rapidly developed and routed into human clinical trials. The results of these trials have been disappointing. Here we review the studies that brought MPIs into clinical testing and discuss the design and outcome of the trials in light of new information about the cellular source, substrates, and mode of action of MMPs at different stages of tumor progression. The important lessons learned from the MPI experience may be of great value for future studies of MPIs and for cancer drug development in general.
Insights
Matrix metalloproteinase inhibitors (MPIs) show promise for cancer therapy due to MMPs
Area of Science:
- Oncology
- Biochemistry
Background:
- Matrix metalloproteinases (MMPs) are upregulated in malignant tissues and degrade the extracellular matrix.
- MMPs have been considered promising therapeutic targets for cancer treatment.
- Synthetic metalloproteinase inhibitors (MPIs) were developed based on compelling preclinical data.
Purpose of the Study:
- To review studies leading to clinical trials of MPIs.
- To discuss MPI trial design and outcomes in light of new MMP information.
- To extract lessons for future MPI studies and cancer drug development.
Main Methods:
- Review of preclinical studies and human clinical trials of MPIs.
- Analysis of new information on MMPs' cellular source, substrates, and action during tumor progression.
Main Results:
- Preclinical studies showed compelling efficacy of MMP suppression.
- Human clinical trials with MPIs have yielded disappointing results.
- New data reveal complexities in MMPs' roles at different tumor progression stages.
Conclusions:
- The clinical failure of MPIs highlights a gap between preclinical promise and therapeutic reality.
- Understanding MMPs' diverse roles is crucial for effective cancer therapy.
- Lessons from the MPI experience can guide future cancer drug development.
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