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- W2008771736 abstract "Although amphotericin B (AmB) is a major polyene antibiotic against invasive fungal infection, administration to patients sometimes causes inflammatory side effects, which limits the usage of the antibiotic. We studied the intracellular signaling that was induced by AmB. p65 (RelA) of nuclear factor-kappaB (NF-kappaB), a well-known signaling molecule as an inducer of proinflammatory cytokines, was phosphorylated by AmB in RAW264.7 cells, a monocyte-like cell line. Among chemical inhibitors of signaling molecules, U-73122 (phospholipase C (PLC) inhibitor), Gö6976 (protein kinase C (PKC) inhibitor), BAPTA-AM (calcium chelator), LFM-A13 (Bruton's tyrosine kinase (Btk)-specific inhibitor), and PP2 (c-Src kinase inhibitor) suppressed AmB-induced phosphorylation of p65 and translocation of p65 into the nucleus. U-73122 and Gö6976 reduced AmB-mediated induction of proinflammatory cytokines (tumor necrosis factor (TNF)-alpha and interleukin (IL)-6) in RAW264.7 cells. Furthermore, AmB-induced activation of NF-kappaB was observed in toll-like receptor (TLR) 2-expressed cells, and the activation of NF-kappaB was inhibited by U-73122, whereas peptidoglycan-induced NF-kappaB activation, which was also dependent on TLR2, was not inhibited by U-73122. Finally, U-73122 partially suppressed in vivo production of TNF-alpha and IL-6 induced by AmB administration in BALB/c mice. These results suggested that the signaling from AmB stimulation to proinflammatory cytokine production is mediated by TLR2, Btk, PLC, PKC, c-Src and NF-kappaB. These signaling molecules may become a target for chemotherapy suppressing AmB-induced proinflammatory cytokine production." @default.
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- W2008771736 date "2006-04-01" @default.
- W2008771736 modified "2023-09-23" @default.
- W2008771736 title "Analysis of Amphotericin B-Induced Cell Signaling with Chemical Inhibitors of Signaling Molecules" @default.
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- W2008771736 doi "https://doi.org/10.1111/j.1348-0421.2006.tb03792.x" @default.
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