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• W2601688508 abstract "By physically interacting with beta-1 integrins, the NG2 proteoglycan enhances activation of the integrin heterodimers. In glioma cells, co-localization of NG2 and 31 integrin in individual cells (cis interaction) can be demonstrated by immunolabeling, and the NG2-integrin interaction can be confirmed by co-immunoprecipitation. NG2-dependent integrin activation is detected via use of conformationally sensitive monoclonal antibodies that reveal the activated state of the beta-1 subunit in NG2-positive versus NG2-negative cells. NG2-dependent activation of beta-1 integrins triggers downstream activation of FAK and PI3K/Akt signaling, resulting in increased glioma cell proliferation, motility, and survival. Similar NG2-dependent cis activation of beta-1 integrins occurs in microvascular pericytes, leading to enhanced proliferation and motility of these vascular cells. Surprisingly, pericyte NG2 is also able to promote beta-1 integrin activation in closely apposed endothelial cells (trans interaction). Enhanced beta-1 signaling in endothelial cells promotes endothelial maturation by inducing the formation of endothelial junctions, resulting in increased barrier function of the endothelium and increased basal lamina assembly. NG2-dependent beta-1 integrin signaling is therefore important for tumor progression by virtue of its affects not only on the tumor cells themselves, but also on the maturation and function of tumor blood vessels." @default.
• W2601688508 created "2017-04-07" @default.
• W2601688508 creator A5054579830 @default.
• W2601688508 date "2017-03-31" @default.
• W2601688508 modified "2023-09-23" @default.
• W2601688508 title "NG2 Proteoglycan Enhances Brain Tumor Progression by Promoting Beta-1 Integrin Activation in both Cis and Trans Orientations" @default.
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• W2601688508 doi "https://doi.org/10.3390/cancers9040031" @default.
• W2601688508 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5406706" @default.
• W2601688508 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/28362324" @default.
• W2601688508 hasPublicationYear "2017" @default.
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