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• W2084634046 abstract "Smooth muscle (SM) 22α, an actin-binding protein, is down-regulated in atherosclerotic arteries. Disruption of SM22α promotes arterial inflammation through activation of reactive oxygen species (ROS)-mediated nuclear factor (NF)-κB pathways. This study aimed to investigate the mechanisms by which SM22α regulates vascular inflammatory response. The ligation injury model of SM22α(-/-) mice displayed up-regulation of inflammatory molecules MCP-1, VCAM-1, and ICAM-1 in the carotid arteries. Similar results were discovered in human atherosclerotic samples. In vitro studies, overexpression of SM22α attenuated TNF-α-induced IκBα phosphorylation and degradation, accompanied by decreased NF-κB activity and reduced inflammatory molecule expression. Using coimmunoprecipitation, we found that SM22α interacted with and stabilized IκBα in quiescent VSMCs. Upon TNF-α stimulation, SM22α was phosphorylated by casein kinase (CK) II at Thr139, leading to dissociation of SM22α from IκBα, followed by IκBα degradation and NF-κB activation. Our findings demonstrate that SM22α is a phosphorylation-regulated suppressor of IKK-IκBα-NF-κB signaling cascades. SM22α may be a novel therapeutic target for human vascular diseases and other inflammatory conditions." @default.
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• W2084634046 date "2015-07-01" @default.
• W2084634046 modified "2023-09-22" @default.
• W2084634046 title "SM22α inhibits vascular inflammation via stabilization of IκBα in vascular smooth muscle cells" @default.
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• W2084634046 doi "https://doi.org/10.1016/j.yjmcc.2015.04.020" @default.
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