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Stretch-induced activation of ERK in myocytes is p38 and calcineurin-dependent

Activation of specific mitogen-activated protein kinases (MAPKs) has been suggested to be involved in phenotype modulation of cells subjected to mechanical strain, which may be common to different mechano-sensitive cell types. We have submitted C2C12 myocytes to a static stretch and examined its effect upon the activation of ERK. Stretch induced a rapid but transient activation of ERK. This activation was however prevented when cells were pre-treated with inhibitors of p38 and calcineurin. The dependence of strain-induced ERK activation upon p38 suggests a cross-talk between these two pathways when mediating a response to a mechanical stimulus in this cell type. This suggests that cross relationships between these MAP kinases may be of crucial importance for myocyte phenotype modulation and differentiation in response to a mechanical stimulus. Copyright © 2008 John Wiley & Sons, Ltd.

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