Abstract

In the present study, we investigated whether activation of the MAPK family could regulate the cell surface expression of Na channels in cultured bovine adrenal chromaffin cells. The results suggest that constitutively activated ERK (but not p38 or JNK), by various extracellular stimuli, down-modulates the density of cell surface Na channels, which was mediated via the destabilization of Na channel alpha-subunit mRNA.

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