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Updated: Jan 31, 2026
Detection of Functional Matrix Metalloproteinases by Zymography
Published on: November 8, 2010
Mitochondria-Associated Matrix Metalloproteinases 2 and 9 in Acute Renal Pathologies
I B Pevzner1,2, L D Zorova1,2, F A Galkin3
1A. N. Belozersky Research Institute of Physico-Chemical Biology, M. V. Lomonosov Moscow State University, Moscow, Russia.
Abstract:
Activities of MMP-2 and MMP-9 in the cytoplasm and mitochondria of kidney cells were evaluated on the models of acute renal pathologies: pyelonephritis, rhabdomyolysis, and ischemia/reperfusion of the kidney. In acute pyelonephritis, a significant increase in the level of MMP-2 and MMP-9 in kidney cells and the appearance of mitochondrial MMP-2 isoform with a lower molecular weight, but still exhibiting proteolytic activity were observed. A direct correlation between the level of MMP-2 and MMP-9 in the kidney and the severity of inflammation in pyelonephritis was revealed. Obviously, the appearance of active protease in the mitochondria of the kidney cells could have an impact on their functioning and, generally, on the fate of renal cells in this pathology.
Insights
Matrix metalloproteinases (MMPs), specifically MMP-2 and MMP-9, were studied in acute kidney injury models. Increased MMPs in kidney cells and active MMP-2 in mitochondria correlated with pyelonephritis severity.
Area of Science:
- Nephrology
- Molecular Biology
- Biochemistry
Background:
- Matrix metalloproteinases (MMPs), particularly MMP-2 and MMP-9, play roles in tissue remodeling and degradation.
- Their involvement in acute kidney pathologies is not fully understood, especially concerning subcellular localization.
Purpose of the Study:
- To investigate the activity and localization of MMP-2 and MMP-9 in kidney cells during acute renal pathologies.
- To determine the correlation between MMP levels and disease severity in pyelonephritis.
Main Methods:
- Evaluation of MMP-2 and MMP-9 activity in kidney cell cytoplasm and mitochondria.
- Analysis of acute renal pathology models: pyelonephritis, rhabdomyolysis, and ischemia/reperfusion.
- Assessment of MMP isoform characteristics, including molecular weight and proteolytic activity.
Main Results:
- Significant elevation of MMP-2 and MMP-9 levels in kidney cells during acute pyelonephritis.
- Detection of a lower molecular weight, active MMP-2 isoform within kidney cell mitochondria.
- A direct correlation was established between kidney MMP levels and pyelonephritis inflammation severity.
Conclusions:
- The presence of active MMP-2 in kidney cell mitochondria during pyelonephritis may significantly impact cellular function.
- These findings suggest MMPs play a critical role in the pathogenesis and cellular fate of acute kidney injuries.
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