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- W2078454939 abstract "Activation of the ERK mitogen-activated protein kinase pathway has been implicated in pro-survival and cellular protective mechanisms, so that chronic ERK activation may be a useful therapeutic strategy. Here, we further explored the consequences of prolonged ERK activation following expression of constitutively active form of MEK, MEK-EE, in cardiac myocytes. We confirmed that chronic MEK-EE overexpression halved myocyte death following glucose deprivation, but surprisingly this was not associated with preserved intracellular ATP levels. Whilst activities of a number of antioxidant enzymes were not altered upon MEK-EE expression, paradoxically Cu/Zn superoxide dismutase activity was almost halved upon MEK-EE expression. When we then exposed myocytes to the superoxide generator menadione, we observed significantly higher death of MEK-EE expressing myocytes. Pre-incubation with U0126 inhibited menadione-induced death. Our results are the first to show that MEK-ERK signalling can act to increase or decrease cell survival, the outcome depending on the form of stress stimulus encountered." @default.
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- W2078454939 date "2006-06-01" @default.
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- W2078454939 title "Contrasting actions of prolonged mitogen-activated protein kinase activation on cell survival" @default.
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- W2078454939 doi "https://doi.org/10.1016/j.bbrc.2006.04.161" @default.
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