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- W2156842811 abstract "The protein kinase inhibitor staurosporine elicits multiple responses in various systems. We evaluated nine naturally occurring staurosporine derivatives as modulators of chemokine production by monitoring the secretion of interleukin-8 (IL-8) and monocyte chemotactic protein-1 (MCP-1) in the cell line NB-4. Several staurosporines increased, dose- and time-dependently, the IL-8 and MCP-1 concentration in the cell culture supernatants and three derivatives strongly inhibited proliferation of the NB-4 cells. By comparing the efficiency of these analogues at the same concentration, the lead compound staurosporine (STS-1) was the best inducer of chemokine secretion, whereas 3-hydroxystaurosporine (STS-3) was the most potent growth inhibitor. Besides the staurosporines, also 12-O-tetradecanoyl phorbol acetate (TPA) and tumor necrosis factor-alpha (TNFalpha) strongly increased the IL-8 and MCP-1 secretion of NB-4 cells. Several staurosporine analogues clearly inhibited the TPA-induced but enhanced the TNFalpha-mediated chemokine increase. These effects, namely the increase of chemokines in untreated or TNFalpha-treated cells and the inhibition of chemokine release in TPA-treated cells, cannot be explained by the exclusive inhibition of protein kinase C (PKC). It may indicate that staurosporines are additionally involved in activation of the PKC-triggered chemokine production." @default.
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- W2156842811 date "2003-10-01" @default.
- W2156842811 modified "2023-10-03" @default.
- W2156842811 title "Differential effects of staurosporine and its analogues on chemokine release by promyelocytic leukemia cell line NB-4" @default.
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- W2156842811 doi "https://doi.org/10.1016/s0145-2126(03)00047-x" @default.
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