Abstract:
:Matrix metalloproteinase-14 (MMP-14) promotes vulnerable plaque morphology in mice, whereas tissue inhibitor of metalloproteinases-3 (TIMP-3) overexpression is protective. MMP-14(hi) TIMP-3(lo) rabbit foam cells are more invasive and more prone to apoptosis than MMP-14(lo) TIMP-3(hi) cells. We investigated the implications of these findings for human atherosclerosis. In vitro generated macrophages and foam-cell macrophages, together with atherosclerotic plaques characterised as unstable or stable, were examined for expression of MMP-14, TIMP-3, and inflammatory markers. Proinflammatory stimuli increased MMP-14 and decreased TIMP-3 mRNA and protein expression in human macrophages. However, conversion to foam-cells with oxidized LDL increased MMP-14 and decreased TIMP-3 protein, independently of inflammatory mediators and partly through posttranscriptional mechanisms. Within atherosclerotic plaques, MMP-14 was prominent in foam-cells with either pro- or anti-inflammatory macrophage markers, whereas TIMP-3 was present in less foamy macrophages and colocalised with CD206. MMP-14 positive macrophages were more abundant whereas TIMP-3 positive macrophages were less abundant in plaques histologically designated as rupture prone. We conclude that foam-cells characterised by high MMP-14 and low TIMP-3 expression are prevalent in rupture-prone atherosclerotic plaques, independent of pro- or anti-inflammatory activation. Therefore reducing MMP-14 activity and increasing that of TIMP-3 could be valid therapeutic approaches to reduce plaque rupture and myocardial infarction.
journal_name
Mediators Inflammjournal_title
Mediators of inflammationauthors
Johnson JL,Jenkins NP,Huang WC,Di Gregoli K,Sala-Newby GB,Scholtes VP,Moll FL,Pasterkamp G,Newby ACdoi
10.1155/2014/276457subject
Has Abstractpub_date
2014-01-01 00:00:00pages
276457eissn
0962-9351issn
1466-1861journal_volume
2014pub_type
杂志文章abstract::The aim of this study was to evaluate the effects of moderate-intensity exercise on plasma levels of C-reactive protein (CRP) and tumor necrosis factor-alpha (TNF-α) as markers of low-grade inflammation and endothelial function in diabetic (db/db) mice. Control and db/db mice were divided into sedentary and exercised ...
journal_title:Mediators of inflammation
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journal_title:Mediators of inflammation
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journal_title:Mediators of inflammation
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journal_title:Mediators of inflammation
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journal_title:Mediators of inflammation
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abstract::The secretory leukocyte protease inhibitor (SLPI) is a low-molecular-weight inhibitor of proteases, such as elastase and cathepsin G which are released from leukocytes during phagocytosis. The purpose of this study was to determine whether or not SLPI is able to inhibit IgE-mediated histamine release. Nasal mucosa fro...
journal_title:Mediators of inflammation
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journal_title:Mediators of inflammation
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journal_title:Mediators of inflammation
pub_type: 杂志文章,meta分析,评审
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journal_title:Mediators of inflammation
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journal_title:Mediators of inflammation
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doi:10.1155/2014/364209
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journal_title:Mediators of inflammation
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journal_title:Mediators of inflammation
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journal_title:Mediators of inflammation
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journal_title:Mediators of inflammation
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doi:10.1155/S0962935194000153
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journal_title:Mediators of inflammation
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abstract::The pathogenesis of brain inflammation and damage by human immunodeficiency virus (HIV) infection is unclear. Because blood-brain barrier damage and impaired cerebral perfusion are common features of HIV-1 infection, we evaluated the role of tumour necrosis factor-alpha (TNF-alpha) and interleukin-1beta (IL-1beta) in ...
journal_title:Mediators of inflammation
pub_type: 杂志文章
doi:10.1155/S0962935192000292
更新日期:1992-01-01 00:00:00
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journal_title:Mediators of inflammation
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pub_type: 杂志文章,收录出版
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journal_title:Mediators of inflammation
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journal_title:Mediators of inflammation
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journal_title:Mediators of inflammation
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journal_title:Mediators of inflammation
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abstract::As a noninvasive method, exhaled breath condensate (EBC) has gained importance to improve monitoring of lung diseases and to detect biomarkers. The aim of the study was to investigate, whether erythropoietin (EPO) is detectable in EBC. EBC was collected from 22 consecutive patients as well as from healthy individuals....
journal_title:Mediators of inflammation
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journal_title:Mediators of inflammation
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journal_title:Mediators of inflammation
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journal_title:Mediators of inflammation
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