Plasma levels of metalloproteinases-9 and -2 in the acute and subacute phases of type A and type B aortic dissection

Journal of Cardiovascular Medicine
Giuseppe SangiorgiKim A Eagle

Abstract

Aortic dissection is characterized by an acute phase of medial dissection and a subacute-chronic phase of vessel wall repair. Matrix metalloproteinases (MMPs), through degradation of extracellular matrix, may play an important role in these processes. Elevation of MMPs might represent an opportunity to diagnostically characterize acute or chronic aortic processes. We examined the potential diagnostic role of MMP-9 and MMP-2 in different phases of aortic dissection. Plasma levels of MMPs were evaluated by enzyme-linked immunosorbent assay technique in 13 patients affected by acute aortic dissection (nine type A, four type B). Ten healthy subjects were used as controls. In patients with type B aortic dissection treated medically, plasma curves (1, 3, 6, 12, 24, 48 and 96 h; 1 and 2 weeks; and 2 months from symptom onset) were also assessed. Aortic tissue samples obtained during surgery were evaluated by immunohistochemistry and western blot for MM-9 and tissue inhibitor of metalloproteinase-1 expression. MMP-9 plasma levels were increased in patients affected by type A and type B aortic dissection presenting within 1 h from onset of symptoms compared to controls (29.3 +/- 16.1 and 16.7 +/- 2.1 ng/ml versus 7.74 +/- 1.6 ng/ml, P <...Continue Reading

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