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p53 is a key stress responsive cellular component. It is negatively regulated by MDM2, which is also its transcriptional target. Here we have studied the involvement of phosphatidylinositol-3-kinases (PI-3-kinase) in the regulation of p53-MDM2 pathway following cellular stress induced by UV damage and proteasomal downregulation. We show that p53 stabilized both by proteasome inhibition and UV damage...
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