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- W1968004016 abstract "Glioblastoma is the most malignant and common brain tumor. To promote their growth, these glioma cells secrete a variety of soluble factors including plasminogen activator inhibitor-1 (PAI-1), which functions as an inhibitor of plasminogen activators. We report here with the basis of microarray gene expression analysis that CXCR4 expressing glioma cells are capable of expressing PAI-1 mRNA and protein upon CXCL12 stimulation. Pretreatment with U0126, an inhibitor of mitogen activated protein kinase (MAPK)/extracellular signal-regulated kinase (ERK) kinase (MEK) 1/2, abrogated CXCL12-induced PAI-1 expression. Pertussis toxin (PTX), an inhibitor of Gαi proteins, also had inhibitory effects, indicating that the activation of Gαi and ERK MAPK are required for this response. Interestingly, CXCL12 showed additive effects with another PAI-1 inducers, tumor necrosis factor (TNF)-α and/or tumor growth factor (TGF)-β1, in increasing PAI-1 expression. These results indicate that CXCL12/CXCR4 signaling in glioma cells may be another mechanism for these cells to express PAI-1, which may be involved in angiogenesis and tumor invasion in brain tumors." @default.
- W1968004016 created "2016-06-24" @default.
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- W1968004016 date "2009-01-01" @default.
- W1968004016 modified "2023-09-26" @default.
- W1968004016 title "CXCL12-Mediated Induction of Plasminogen Activator Inhibitor-1 Expression in Human CXCR4 Positive Astroglioma Cells" @default.
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- W1968004016 doi "https://doi.org/10.1248/bpb.32.573" @default.
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