Université de Fribourg

Progesterone down-regulates the open probability of the amiloride-sensitive epithelial sodium channel via a Nedd4-2-dependent mechanism

Michlig, Stéphanie ; Harris, Michael ; Loffing, Johannes ; Rossier, Bernard C. ; Firsov, Dmitri

In: Journal of Biological Chemistry, 2005, vol. 280, no. 46, p. 38264-38270

Activation of the mitogen-activated protein (MAP) kinase cascade by progesterone in Xenopus oocytes leads to a marked down-regulation of activity of the amiloride-sensitive epithelial sodium channel (ENaC). Here we have studied the signaling pathways involved in progesterone effect on ENaC activity. We demonstrate that: (i) the truncation of the C termini of the αβγENaC subunits...