ArticleCirculation research2010
Disruption of SM22 promotes inflammation after artery injury via nuclear factor kappaB activation.
Article in Circulation research, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 59 papers.
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Who cites it
59 citing papers in PubMed, 113 citations in OpenAlex.
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- Article
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- SM22α Deletion Contributes to Neurocognitive Impairment in Mice through Modulating Vascular Smooth Muscle Cell Phenotypes.International journal of molecular sciences · 2023Article
- The epithelial transcriptome and mucosal microbiota are altered for goats fed with a low-protein diet.Frontiers in microbiology · 2023Article
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Corrections and comments
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Authors and funding
7 authors at 1 institution in 1 country.
Funding
Abstract
rationaleSM22 (or transgelin), an actin-binding protein abundant in vascular smooth muscle cells (VSMCs), is downregulated in atherosclerosis, aneurysm and various cancers. Abolishing SM22 in apolipoprotein E knockout mice accelerates atherogenesis. However, it is unclear whether SM22 disruption independently promotes arterial inflammation.
objectiveTo investigate whether SM22 disruption directly promotes inflammation on arterial injury and to characterize the underlying mechanisms. METHODS AND
resultsUsing carotid denudation as an artery injury model, we showed that Sm22 knockout (Sm22(-/-)) mice developed enhanced inflammatory responses with higher induction of proinflammatory genes, including Vcam1, Icam1, Cx3cl1, Ccl2, and Ptgs2. Higher expression of these genes was confirmed in primary Sm22(-/-) VSMCs and in PAC1 cells after Sm22 knockdown, whereas SM22 recapitulation in primary Sm22(-/-) VSMCs decreased their expression. NFKB2 was prominently activated in both injured carotids of Sm22(-/-) mice and in PAC1 cells after Sm22 knockdown and may mediate upregulation of these proinflammatory genes. As a NF-kappaB activator, reactive oxygen species (ROS) increased in primary Sm22(-/-) VSMCs and in PAC1 cells after Sm22 knockdown. ROS scavengers blocked NF-kappaB activation and induction of proinflammatory genes. Furthermore, Sm22 knockdown increased Sod2 expression and activated p47phox, reflecting contributions of mitochondria and NADPH oxidase to the augmented ROS production; this may result from actin and microtubule cytoskeletal remodeling.
conclusionsOur findings show that SM22 downregulation can induce proinflammatory VSMCs through activation of ROS-mediated NF-kappaB pathways. This study provides initial evidence linking VSMC cytoskeleton remodeling with arterial inflammation.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.