| Aortic Dilatation With Bicuspid Aortic Valves: Cusp Fusion Correlates to Matrix Metalloproteinases and Inhibitors. | |
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MedLine Citation:
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PMID: 22206960 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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BACKGROUND: Congenital bicuspid aortic valves (BAVs) result from fusion of 2 valve cusps, resulting in left-noncoronary (L-N), right-left (R-L), and right-noncoronary (R-N) morphologic presentations. BAVs predispose to ascending thoracic aortic aneurysms (ATAAs). This study hypothesized that ATAAs with each BAV morphologic group possess unique signatures of matrix metalloproteinases (MMPs) and endogenous tissue inhibitors of metalloproteinases (TIMPs). METHODS: Ascending thoracic aortic aneurysm tissue from 46 patients with BAVs was examined for MMP/TIMP abundance, and global MMP activity was compared with normal aortic specimens (n = 15). Proteolytic balance was calculated as the ratio of MMP abundance to a composite TIMP score. Results were stratified by valve morphologic group (L-N [n = 6], R-L [n = 31], and R-N [n = 9]). RESULTS: The BAV specimens (p < 0.05 versus normal aorta, 100%) displayed elevated global MMP activity (273%±63%), MMP-9 (263%±47%), and decreased MMP-7 (56%±10%), MMP-8 (58%±11%), TIMP-1 (63%±7%), and TIMP-4 (38%±3%). The R-L group showed increased global MMP activity (286%±89%) and MMP-9 (267%±55%) with reduced MMP-7 (45%±7%), MMP-8 (68%±15%), TIMP-1 (58%±7%), and TIMP-4 (35%±3%). The L-N group showed elevated global MMP activity (284%±71%) and decreased MMP-8 (37%±17%) and TIMP-4 (48%±14) activity. In the R-N group, MMP-7 (46%±13%) and MMP-8 (36%±17%) and TIMP-1 (59%±10%) and TIMP-4 (42%±5%) were decreased. The R-L group demonstrated an increased proteolytic balance for MMP-1, MMP-9, and MMP-12 relative to L-N and R-N. CONCLUSIONS: Each BAV morphologic group possesses a unique signature of MMPs and TIMPs. MMP/TIMP score ratios suggest that the R-L group may be more aggressive, justifying earlier surgical intervention. |
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Authors:
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John S Ikonomidis; Jean Marie Ruddy; Stewart M Benton; Jazmine Arroyo; Theresa A Brinsa; Robert E Stroud; Ahmed Zeeshan; Joseph E Bavaria; Joseph H Gorman; Robert C Gorman; Francis G Spinale; Jeffrey A Jones |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-12-27 |
Journal Detail:
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Title: The Annals of thoracic surgery Volume: - ISSN: 1552-6259 ISO Abbreviation: - Publication Date: 2011 Dec |
Date Detail:
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Created Date: 2011-12-30 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 15030100R Medline TA: Ann Thorac Surg Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 The Society of Thoracic Surgeons. Published by Elsevier Inc. All rights reserved. |
Affiliation:
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Division of Cardiothoracic Surgery, Medical University of South Carolina, Charleston, South Carolina. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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