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Matrix metalloproteinases 2 and 9 work in concert to produce aortic aneurysms

Open access
Longo, G. Matthew, Xiong, Wanfen, Greiner, Timothy C., Zhao, Yong, Fiotti, Nicola, Baxter, B. Timothy·2002·Journal of Clinical Investigation

Abstract

Matrix metalloproteinases (MMPs) 9 and 2 are increased in human abdominal aortic aneurysm (AAA) tissue, but their precise role and potential interaction remain unclear.Experimental induction of aortic aneurysms in mice genetically deficient in these peptidases could provide new insight into AAA pathogenesis.Mice deficient in the expression of MMP-9 (MMP-9KO) or MMP-2 (MMP-2KO) and their corresponding wild-type background mice (WT) underwent AAA induction by abluminal application of calcium chloride (CaCl 2 ).No aneurysm formation was observed at 10 weeks after treatment in either the MMP-9KO or the MMP-2KO mice, whereas the corresponding WT mice showed an average 74% and 52% increase in aortic diameter, respectively.Reinfusion of competent macrophages from the corresponding WT strains into knockout mice resulted in reconstitution of AAA in MMP-9KO but not MMP-2KO mice.These findings suggest that macrophage-derived MMP-9 and mesenchymal cell MMP-2 are both required and work in concert to produce AAA.

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Metadata

Authors
Longo, G. M., Xiong, W., Greiner, T. C., Zhao, Y., Fiotti, N., & Baxter, B. T.
Venue
Journal of Clinical Investigation
Published
2002-09-01
Volume
110
Issue
5
Pages
625-632
ISSN
0021-9738 (ISSN-L)
OpenAlex
W4239965812
Cited by
877
References
2
FWCI
23.47
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Matrix metalloproteinases 2 and 9 work in concert to produce aortic aneurysms. https://app.cochat.ai/papers/10.1172/jci0215334
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Longo, G. M., Xiong, W., Greiner, T. C., Zhao, Y., Fiotti, N., & Baxter, B. T. (2002). Matrix metalloproteinases 2 and 9 work in concert to produce aortic aneurysms. Journal of Clinical Investigation. https://doi.org/10.1172/jci0215334

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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