PURPOSE: To assess baseline and follow-up plasma concentrations of metalloproteinase-9 (MMP-9), MMP-2, and tissue inhibitor of metalloproteinase-2 (TIMP-2) in patients undergoing carotid thromboendarterectomy (TEA) in relation to tissue expression and diagnostic features. BASIC METHODS: Using sandwich enzyme-linked immunosorbent assay, plasma levels of enzymes were determined in 15 patients undergoing carotid TEA. Tissue sections were incubated with specific antibodies and fluorescence intensity was analyzed. PRINCIPAL FINDINGS: MMP-9 levels were higher in patients with carotid stenosis versus controls, significantly in those with cerebral lesions at neuroimaging. MMP-9 levels decreased in 93.4% of the patients at 1 month. MMP-2 levels tended to increase 30 days after surgery. TIMP-2 showed no difference. CONCLUSIONS: High concentrations of MMP-9 found in patients with carotid stenosis and cerebral lesions suggest that MMP-9 assay could be useful in the evaluation of all carotid lesions to help identify those at highest risk of a neurologic event.
PURPOSE: To assess baseline and follow-up plasma concentrations of metalloproteinase-9 (MMP-9), MMP-2, and tissue inhibitor of metalloproteinase-2 (TIMP-2) in patients undergoing carotid thromboendarterectomy (TEA) in relation to tissue expression and diagnostic features. BASIC METHODS: Using sandwich enzyme-linked immunosorbent assay, plasma levels of enzymes were determined in 15 patients undergoing carotid TEA. Tissue sections were incubated with specific antibodies and fluorescence intensity was analyzed. PRINCIPAL FINDINGS:MMP-9 levels were higher in patients with carotid stenosis versus controls, significantly in those with cerebral lesions at neuroimaging. MMP-9 levels decreased in 93.4% of the patients at 1 month. MMP-2 levels tended to increase 30 days after surgery. TIMP-2 showed no difference. CONCLUSIONS: High concentrations of MMP-9 found in patients with carotid stenosis and cerebral lesions suggest that MMP-9 assay could be useful in the evaluation of all carotid lesions to help identify those at highest risk of a neurologic event.
Authors: Sthefano Atique Gabriel; Leila Antonangelo; Vera Luiza Capelozzi; Camila Baumann Beteli; Otacílio de Camargo Júnior; José Luis Braga de Aquino; Roberto Augusto Caffaro Journal: Rev Bras Cir Cardiovasc Date: 2015 Jul-Sep
Authors: Nynke A Jager; Bastiaan M Wallis de Vries; Jan-Luuk Hillebrands; Niels J Harlaar; René A Tio; Riemer H J A Slart; Gooitzen M van Dam; Hendrikus H Boersma; Clark J Zeebregts; Johanna Westra Journal: Mol Imaging Biol Date: 2016-04 Impact factor: 3.488