Different expression of MMPs/TIMP-1 in human atherosclerotic lesions. Relation to plaque features and vascular bed

BACKGROUND: Proteolytic imbalance might determine arterial remodeling and plaque destabilization in atherosclerotic vessels. The aim of this study was to examine differences in the patterns of metalloproteinases (MMPs) and MMP inhibitor (TIMP-1) expression in advanced human atheromas, both in relati...

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Detalles Bibliográficos
Autores: Orbe-Lopategui, J. (Josune)|||/items/033ea7ef-1eff-418a-9fc4-1e2d3498d726, Fernandez-Alonso, L. (Leopoldo)|||/items/332bbbd3-e585-4f0d-a50e-5ba37faae7c0, Rodriguez, J.A. (José Antonio)|||/items/dfeeb791-bd5d-4472-bce8-b7f54cdf8f31, Rabago, G. (Gregorio)|||/items/80ea8921-99e9-46db-b2f0-5bf236e53534, Belzunce-Saldise, M. (Miriam)|||/items/a90582e5-fdba-4fe6-8057-5a072cc3cc18, Monasterio, A. (Alberto)|||/items/c1a0baa7-99ba-4f65-a663-b8f18bbb9957, Roncal-Mancho, C. (Carmen)|||/items/6c0dc409-f0aa-412b-9d75-436ba8a0a4ff, Páramo-Fernández, J.A. (José Antonio)|||/items/8c56baa6-2a43-4836-b91b-4eed15be3c96
Tipo de recurso: artículo
Fecha de publicación:2003
País:España
Institución:Universidad de Navarra
Repositorio:Dadun. Depósito Académico Digital de la Universidad de Navarra
Idioma:inglés
OAI Identifier:oai:dadun.unav.edu:10171/22260
Acceso en línea:https://hdl.handle.net/10171/22260
Access Level:acceso abierto
Palabra clave:Metalloproteinases
TIMP-1
Atherosclerosis
Calcification
Collagen
Aneurysm
Descripción
Sumario:BACKGROUND: Proteolytic imbalance might determine arterial remodeling and plaque destabilization in atherosclerotic vessels. The aim of this study was to examine differences in the patterns of metalloproteinases (MMPs) and MMP inhibitor (TIMP-1) expression in advanced human atheromas, both in relation to the plaque features and the vascular bed involved. METHODS AND RESULTS: Immunohistochemistry for MMP-1, -3, -9 and TIMP-1 as well as the collagen content were measured in vascular sections from patients undergoing peripheral revascularization (carotid n=11, femoral n=23) and aorto-coronary bypass surgery (mammary arteries n=20, as controls). Increased expression of all MMPs was detected in atherosclerotic as compared with control sections (P<0.01). Aneurysmal plaques showed a significant increase of MMP-1 and-3 and a reduction in total collagen (P<0.05) in relation to occlusive lesions. Calcification areas in atherosclerotic plaques were consistently associated with increased TIMP-1 expression (P<0.01). Finally, MMP-9 expression was higher in occlusive lesions from carotid than femoral arteries (P<0.01). CONCLUSIONS: Aneurysm lesions expressed higher MMP-1 and-3 expression than occlusive plaques, and MMP-9 was mainly detected in carotid as compared with femoral arteries. TIMP-1 was associated with arterial calcification. These differences in the MMPs/TIMP-1 expression might determine the evolution of advanced atherosclerotic plaques and contribute to its vulnerability.

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