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• W2936165770 abstract "BackgroundIt is well-established that activation of nuclear factor-kappa B (NF-κB) signaling plays important roles in cancer development and progression. However, the underlying mechanism by which the NF-κB pathway is constitutively activated in cancer remains largely unclear. The present study aimed to investigate the effect of PICALM interacting mitotic regulator (PIMREG) on sustaining NF-κB activation in breast cancer.MethodsThe underlying mechanisms in which PIMREG-mediated NF-κB constitutive activation were determined via immunoprecipitation, EMSA and luciferase reporter assays. The expression of PIMREG was examined by quantitative PCR and western blotting analyses and immunohistochemical assay. The effect of PIMREG on aggressiveness of breast cancer cell was measured using MTT, soft agar clonogenic assay, wound healing and transwell matrix penetration assays in vitro and a Xenografted tumor model in vivo.FindingsPIMREG competitively interacted with the REL homology domain (RHD) of NF-κB with IκBα, and sustained NF-κB activation by promotion of nuclear accumulation and transcriptional activity of NF-κB via disrupting the NF-κB/IκBα negative feedback loop. PIMREG overexpression significantly enhanced NF-κB transactivity and promoted the breast cancer aggressiveness. The expression of PIMREG was markedly upregulated in breast cancer and positively correlated with clinical characteristics of patients with breast cancer, including the clinical stage, tumor-node-metastasis classification and poorer survival.InterpretationPIMREG promotes breast cancer aggressiveness via disrupting the NF-κB/IκBα negative feedback loop, which suggests that PIMREG might be a valuable prognostic factor and potential target for diagnosis and therapy of metastatic breast cancer.FundThe science foundation of China, Guangdong Province, Guangzhou Education System, and the Science and Technology Program of Guangzhou." @default.
• W2936165770 created "2019-04-25" @default.
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• W2936165770 date "2019-05-01" @default.
• W2936165770 modified "2023-10-16" @default.
• W2936165770 title "Overexpression of PIMREG promotes breast cancer aggressiveness via constitutive activation of NF-κB signaling" @default.
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• W2936165770 doi "https://doi.org/10.1016/j.ebiom.2019.04.001" @default.
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