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In this report we explored the effects of proteasome inhibitors (MG132, aLLN, lactacystin and MG262) on interleukin-8 (IL-8) induction. In HEK293 cells, proteasome inhibitors could concentration-dependently increase IL-8 promoter and activator protein-1 (AP-1) activities, but inhibited nuclear factor (NF)-κB activation induced by cytokines. The stimulating effects on IL-8 promoter and AP-1 were reduced...
To find out whether and how proteasome is involved in plant programmed cell death (PCD) we measured proteasome function in tobacco cells undergoing PCD as a result of heat shock (HS-PCD). Reactive oxygen species (ROS) production, cytochrome c levels and caspase-3-like protease activation were also measured in the absence or presence of MG132, a proteasome inhibitor. We show that proteasome activation...
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