ArticleArteriosclerosis, thrombosis, and vascular biology2022
The Nonproteolytic Intracellular Domain of Membrane-Type 1 Matrix Metalloproteinase Coordinately Modulates Abdominal Aortic Aneurysm and Atherosclerosis in Mice-Brief Report.
Article in Arteriosclerosis, thrombosis, and vascular biology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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8 citing papers in PubMed, 9 citations in OpenAlex.
- Conditional knockout of membrane-type I matrix metalloproteinase in smooth muscle cells of adult mice alleviates atherosclerosis without affecting basic cardiovascular function.Clinical and translational medicine · 2026Article
- Comprehensive analysis for the role of macrophage-driven genes in abdominal aortic aneurysm.Cardiovascular diagnosis and therapy · 2026Article
- Research progress on targeted regulatory proteins in the prevention and treatment of atherosclerosis.Frontiers in immunology · 2026Review
- The Role of Macrophage-Derived Netrin-1 in Inflammatory Diseases.Biomolecules · 2025Review
- Netrin-1 and RGMa: Novel Regulators of Atherosclerosis-Related Diseases.Cardiovascular drugs and therapy · 2025Review
- Tea polyphenol nanoparticles enable targeted siRNA delivery and multi-bioactive therapy for abdominal aortic aneurysms.Journal of nanobiotechnology · 2024Article
- Redefining metalloproteases specificity through network proteolysis.Trends in molecular medicine · 2024Review
- The contribution of matrix metalloproteinases and their inhibitors to the development, progression, and rupture of abdominal aortic aneurysms.Frontiers in cardiovascular medicine · 2023Review
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15 authors at 2 institutions in 1 country.
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Abstract
backgroundMT1-MMP (membrane-type 1 matrix metalloproteinase, MMP-14) is a transmembrane-anchored protein with an extracellular proteinase domain and a cytoplasmic tail devoid of proteolytic functions but capable of mediating intracellular signaling that regulates tissue homeostasis. MT1-MMP extracellular proteolytic activity has been shown to regulate pathological remodeling in aortic aneurysm and atherosclerosis. However, the role of the nonproteolytic intracellular domain of MT1-MMP in vascular remodeling in abdominal aortic aneurysms (AAA) is unknown.
methodsWe generated a mutant mouse that harbors a point mutation (Y573D) in the MT1-MMP cytoplasmic domain that abrogates the MT1-MMP signaling function without affecting its proteolytic activity. These mice and their control wild-type littermates were subjected to experimental AAA modeled by angiotensin II infusion combined with PCSK9 (proprotein convertase subtilisin/kexin type 9) overexpression and high-cholesterol feeding.
resultsThe mutant mice developed more severe AAA than the control mice, with concomitant generation of intraaneurysmal atherosclerotic lesions and dramatically increased macrophage infiltration and elastin degradation. Aortic lesion-associated and bone marrow-derived macrophages from the mutant mice exhibited an enhanced inflammatory state and expressed elevated levels of proinflammatory Netrin-1, a protein previously demonstrated to promote both atherosclerosis and AAA.
conclusionsOur findings show that the cytoplasmic domain of MT1-MMP safeguards from AAA and atherosclerotic plaque development through a proteolysis-independent signaling mechanism associated with Netrin-1 expression. This unexpected function of MT1-MMP unveils a novel mechanism of synchronous onset of AAA and atherogenesis and highlights its importance in the control of vascular wall homeostasis.
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