MT 1‐MMP evaluation in neointimal hyperplasia in the late follow‐up after prosthesis implantation
| Autor: | Marta Bruczko, Krzysztof Sobolewski, Lech Romanowicz, Radosław Kowalewski, Małgorzata Wolańska, Tomasz Gogiel |
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| Rok vydání: | 2019 |
| Předmět: |
Reoperation
Neointima Pathology medicine.medical_specialty Arterial Occlusive Diseases Matrix metalloproteinase Iliac Artery Vascular occlusion Pathology and Forensic Medicine Extracellular matrix Blood Vessel Prosthesis Implantation Restenosis Matrix Metalloproteinase 14 Humans Medicine Zymography Molecular Biology Aorta Neointimal hyperplasia Leg Tissue Inhibitor of Metalloproteinase-2 Hyperplasia business.industry Graft Occlusion Vascular Original Articles Cell Biology medicine.disease Thrombosis Femoral Artery Matrix Metalloproteinase 2 medicine.symptom business |
| Zdroj: | International Journal of Experimental Pathology. 100:94-101 |
| ISSN: | 1365-2613 0959-9673 |
| DOI: | 10.1111/iep.12310 |
| Popis: | Vascular surgical interventions are often burdened with late complications, including thrombosis or restenosis. The latter is generally caused by neointimal hyperplasia. Although extracellular matrix (ECM) remodelling is an important part of neointima formation, this process is not clearly understood. The aim of the study was to assess the content and activity of membrane‐type 1 matrix metalloproteinase in human neointima in the late stages of its development. Matrix metalloproteinase‐2 and tissue inhibitor of matrix metalloproteinase‐2 were also evaluated. The research was performed on neointima samples collected during secondary vascular interventions from patients with chronic limb ischaemia who developed vascular occlusion at 6‐18 months after aorto/ilio‐femoral bypass grafting. The control material consisted of segments of femoral arteries collected from organ donors. Western blot and/or ELISA were used for the determination of MT1‐MMP and TIMP‐2 expression. The activity of MT1‐MMP was measured by fluorometric assay and that of MMP‐2 by zymography. We demonstrated significantly increased MT1‐MMP protein content in neointima when compared to normal arteries. However, the activity of MT1‐MMP was significantly lower in neointima than in control samples. The decreased MT1‐MMP activity was concomitant with reduced activity of MMP‐2. The TIMP‐2 protein levels in neointima and normal arteries were not significantly different. The results of our study suggest that the reduced activity of MT1‐MMP and consequently MMP‐2 in human neointima may play a role in decreased degradation of ECM components and thus promote neointimal overgrowth. |
| Databáze: | OpenAIRE |
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