Related Experiment Video
Updated: Apr 19, 2026
Induction of Ischemic Stroke and Ischemia-reperfusion in Mice Using the Middle Artery Occlusion Technique and Visualization of Infarct Area
Published on: February 2, 2017
Effect of simvastatin on MMPs and TIMPs in human brain endothelial cells and experimental stroke
Björn Reuter1, Claus Rodemer, Saskia Grudzenski
1Department of Neurology, Universitätsmedizin Mannheim, University of Heidelberg, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany, bjoern.reuter@uniklinik-freiburg.de.
Abstract:
Clinical studies demonstrated favorable effects of statins in stroke beyond lipid-lowering effects. In acute stroke, the disruption of the blood-brain barrier (BBB) is mediated by matrix metalloproteinases (MMPs). A modified MMP metabolism may account for the beneficial effects of statins. Cultured human brain microvascular endothelial cells (BMECs) were pretreated with simvastatin and subjected to oxygen glucose deprivation (OGD). Gene expression and protein secretion of MMP-2 and MMP-9 and the tissue inhibitor of metalloproteinase (TIMP)-1 and TIMP-2 were measured by quantitative real-time polymerase chain reaction (PCR) and enzyme-linked immunosorbent assay (ELISA). Simvastatin significantly dampened the expression but not secretion of MMP-2 under OGD. MMP-9 synthesis rate was low and unaffected by simvastatin treatment, while the gene expression and protein secretion of TIMP-1 and TIMP-2 were both strongly induced. Our results provide evidence for a positive effect of simvastatin on the MMP metabolism in human BMECs and experimental stroke mainly by means of the increased expression and secretion of TIMP-1 and TIMP-2.
Insights
Simvastatin positively impacts blood-brain barrier (BBB) integrity in stroke models. It increases tissue inhibitors of metalloproteinases (TIMPs), crucial for regulating matrix metalloproteinases (MMPs) involved in BBB disruption.
Area of Science:
- Neuroscience
- Pharmacology
- Cell Biology
Background:
- Clinical studies suggest statins offer stroke benefits beyond lipid reduction.
- Matrix metalloproteinases (MMPs) mediate blood-brain barrier (BBB) disruption in acute stroke.
- Altered MMP metabolism may explain statin's neuroprotective effects.
Purpose of the Study:
- To investigate the effect of simvastatin on MMP and TIMP metabolism in human brain microvascular endothelial cells (BMECs) under oxygen-glucose deprivation (OGD).
Main Methods:
- Human BMECs were pretreated with simvastatin and subjected to OGD.
- Quantitative real-time PCR and ELISA were used to measure gene expression and protein secretion of MMP-2, MMP-9, TIMP-1, and TIMP-2.
Main Results:
- Simvastatin reduced MMP-2 expression but did not affect its secretion under OGD.
- MMP-9 synthesis was unaffected by simvastatin.
- Simvastatin significantly increased both gene expression and protein secretion of TIMP-1 and TIMP-2.
Conclusions:
- Simvastatin exerts a beneficial effect on MMP metabolism in experimental stroke models.
- This effect is primarily mediated by enhanced expression and secretion of TIMP-1 and TIMP-2, contributing to BBB protection.
