Osmotic swelling and membrane conductances in A6 cells.

Hyposmotic basolateral perturbations (-30 mosmol/kg) in cultured renal layers (A6) increased basolateral membrane conductance more than 2-fold within 10 min; the increase was partly due to upregulation of K+ conductance, but other conductive pathways were also activated. The raise in apical membrane amiloride-sensitive Na+ conductance was less pronounced; it appears to be due to secondary effects.