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- W2025574986 abstract "To gain an insight into the microenvironmental regulation of nuclear factor (NF)-κB activity in the progression of leukemia, we established a bioluminescent imaging model of Philadelphia chromosome-positive acute lymphoblastic leukemia (Ph+ALL) cells transduced with a NF-κB/luciferase (Luc) reporter and cocultured with murine stromal cells and cytokines. Stromal cells alone did not augment Luc activity, taken as an index of NF-κB, but Luc activity was synergistically upregulated by the combination of stromal cells and tumor necrosis factor (TNF)-α. Dehydroxymethylepoxyquinomicin (DHMEQ), a specific inhibitor of NF-κB DNA binding, rapidly induced the apoptosis of Ph+ALL cells, indicating that NF-κB is necessary for the growth and survival of these cells. However, the DHMEQ-induced suppression of NF-κB activity and the apoptosis of leukemia cells were attenuated by the presence of stromal cells and TNF-α. In NOD-SCID mice transplanted with NF-κB/Luc reporter-containing Ph+ALL cell lines and monitored periodically during the progression of the leukemia, murine TNF-α was significantly expressed in lesions in which the leukemia cells emitted a significant NF-κB signal. These results support the notion that TNF-α also triggers microenvironmental upregulation of NF-κB activity in vivo. Collectively, the results indicated that TNF-α-stimulated microenvironment may contribute to the survival and progression of Ph+ALL cells through the synergistic upregulation of NF-κB activity." @default.
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- W2025574986 date "2011-09-01" @default.
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- W2025574986 title "Bioimaging analysis of nuclear factor-κB activity in Philadelphia chromosome-positive acute lymphoblastic leukemia cells reveals its synergistic upregulation by tumor necrosis factor-α-stimulated changes to the microenvironment" @default.
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- W2025574986 doi "https://doi.org/10.1111/j.1349-7006.2011.02039.x" @default.
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