Use of a multiple-enzyme/multiple-reagent assay system to quantify activity levels in samples containing mixtures of matrix metalloproteinases
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Updated: Aug 25, 2026
Detection of Functional Matrix Metalloproteinases by Zymography
Published on: November 8, 2010
Fred H Rasmussen1, Nolan Yeung, Laura Kiefer
1BioZyme, Inc., Apex, North Carolina 27523, USA.
Abstract:
Matrix metalloproteinases (MMPs) are a family of enzymes that are up-regulated in many diseases, including osteoarthritis (OA) and rheumatoid arthritis (RA). Here we report on a novel technique that can be used to simultaneously measure activity levels for a panel of enzymes, such as the MMPs. The technique, termed the multiple-enzyme/multiple-reagent assay system (MEMRAS), relies on the use of reagents such as substrates with varying selectivity profiles against a group of enzymes. When reaction rates are measured by following a change in fluorescence with time, for mixtures of enzymes, an equation with unknown concentrations for each activity is generated for each reagent used. Simultaneously solving the set of equations leads to a solution for the unknown concentrations. We have applied this mathematical technique to measure activity levels for mixtures of MMPs such as collagenase 3 and gelatinase A. In addition, because we were most interested in determining collagenase 3 levels as a potential biological marker for OA, we developed highly selective substrates for this enzyme by using results found in previous bacteriophage substrate-mapping experiments. Some of the best substrates tested have specific activities for collagenase 3 that are 37,000-, 17,000-, 90-, and 200-fold selective over stromelysin 1, collagenase 1, and gelatinases A and B, respectively.
Insights
A new assay system (MEMRAS) simultaneously measures matrix metalloproteinase (MMP) activity. This technique accurately quantifies MMPs like collagenase 3, a potential biomarker for osteoarthritis (OA).
Area of Science:
- Biochemistry
- Enzymology
- Molecular Biology
Background:
- Matrix metalloproteinases (MMPs) are enzymes implicated in diseases like osteoarthritis (OA) and rheumatoid arthritis (RA).
- Accurate measurement of specific MMP activity is crucial for understanding disease mechanisms and identifying biomarkers.
Purpose of the Study:
- To develop and validate a novel technique for simultaneously measuring the activity of multiple enzymes, focusing on MMPs.
- To establish a method for quantifying collagenase 3 activity as a potential biomarker for OA.
Main Methods:
- Introduction of the multiple-enzyme/multiple-reagent assay system (MEMRAS), utilizing substrates with varying selectivity profiles.
- Mathematical analysis involving simultaneous solving of equations generated from reaction rate measurements (fluorescence change over time).
- Development of highly selective substrates for collagenase 3 based on bacteriophage substrate-mapping experiments.
Main Results:
- The MEMRAS technique successfully measured activity levels in mixtures of MMPs, including collagenase 3 and gelatinase A.
- Developed collagenase 3-selective substrates demonstrated significant selectivity over other MMPs (e.g., 37,000-fold over stromelysin 1).
Conclusions:
- MEMRAS provides a robust method for simultaneous MMP activity profiling.
- The developed selective substrates hold promise for accurate collagenase 3 quantification and OA biomarker development.
