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- W2011179500 abstract "BACKGROUND: Glioblastoma is the most common primary brain tumor, with typical histopathologic findings, pseudopalisading necrosis, and microvascular proliferation, all of which are associated with a poor prognosis. Hypoxia is known to affect these morphological features, but the underlying molecular mechanism has been poorly understood. OBJECTIVE: To determine the role of signal transducer and activator of transcription 3 (STAT3) in the malignant progression of glioblastoma under hypoxic conditions. METHODS: We studied STAT3 activation by hypoxic stress and its effect on hypoxia-induced angiogenesis and cell migration using U87, A172, T98, and U373 human glioblastoma cell lines. RESULTS: All four glioblastoma cells analyzed expressed detectable levels of STAT3 phosphorylation. Hypoxic stress markedly increased phosphorylated STAT3 level in a time-dependent fashion, and activated STAT3 was translocated into the nucleus. Hypoxic conditions led to a 30-50% increase in angiogenesis and cell migration, but these effects were significantly attenuated by small interfering ribonucleic acid-mediated knockdown of STAT3. Furthermore, STAT3 activation was associated with an elevated expression of hypoxic inducible factor-1, vascular endothelial growth factor, matrix metalloproteinase 2, and TWIST messenger ribonucleic acid and protein, which may play a critical role in hypoxia-induced angiogenesis and migration. CONCLUSION: STAT3 plays an important role in glioblastoma angiogenesis and migration triggered by hypoxia. Therefore, STAT3 might be a target for control of pseudopalisading necrosis and angiogenesis in glioblastoma." @default.
- W2011179500 created "2016-06-24" @default.
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- W2011179500 date "2010-11-01" @default.
- W2011179500 modified "2023-10-02" @default.
- W2011179500 title "Activated STAT3 Regulates Hypoxia-Induced Angiogenesis and Cell Migration in Human Glioblastoma" @default.
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- W2011179500 doi "https://doi.org/10.1227/neu.0b013e3181f1c0cd" @default.
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