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• W3161569038 endingPage "105396" @default.
• W3161569038 startingPage "105396" @default.
• W3161569038 abstract "Cerebrovascular remodeling is the most common cause of hypertension and stroke. Ubiquitin E3 ligase RING finger protein 34 (RNF34) is suggested to be associated with the development of multiple neurological diseases. However, the importance of RNF34 in cerebrovascular remodeling and hypertension is poorly understood. Herein, we used mice with a global RNF34 knockout as well as RNF34 floxed mice to delete RNF34 in endothelial cells and smooth muscle cells (SMCs). Our results showed that global RNF34 knockout mice substantially promoted angiotensin II (AngII)-induced middle cerebral artery (MCA) remodeling, hypertension, and neurological dysfunction. Endothelial cell RNF34 did not regulate the development of hypertension. Rather, SMC RNF34 expression is a critical regulator of hypertension and MCA remodeling. Loss of RNF34 enhanced AngII-induced mouse brain vascular SMCs (MBVSMCs) proliferation, migration and invasion. Furthermore, MCA and MBVSMCs from SMC RNF34-deficient mice showed increased superoxide anion and reactive oxygen species (ROS) generation as well as nicotinamide adenine dinucleotide phosphate (NADPH) oxidase activity, but exhibited no marked effect on mitochondria-derived ROS. Knockout of RNF34 promoted p22phox expression, leading to increased binding of p22phox/p47phox and p22phox/NOX2, and eventually NADPH oxidase complex formation. Immunoprecipitation assay identified that RNF34 interacted with p22phox. RNF34 deletion increased p22phox protein stability by inhibiting ubiquitin-mediated degradation. Blockade of NADPH oxidase activity or knockdown of p22phox significantly abolished the effects of RNF34 deletion on cerebrovascular remodeling and hypertension. Collectively, our study demonstrates that SMC RNF34 deficiency promotes cerebrovascular SMC hyperplasia and remodeling by increased NADPH-derived ROS generation via reducing p22phox ubiquitin-dependent degradation." @default.
• W3161569038 created "2021-05-24" @default.
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• W3161569038 date "2021-08-01" @default.
• W3161569038 modified "2023-10-03" @default.
• W3161569038 title "RNF34 ablation promotes cerebrovascular remodeling and hypertension by increasing NADPH-derived ROS generation" @default.
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• W3161569038 doi "https://doi.org/10.1016/j.nbd.2021.105396" @default.
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