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Whole cell conductance regulated by cytosolic and ADH-activated Cl- channels in a distal nephron cell line

, : Whole cell conductance regulated by cytosolic and ADH-activated Cl- channels in a distal nephron cell line. Japanese Journal of Physiology 44(SUPPL 2): S295-S300

The effect of antidiuretic hormone (ADH) on a distal nephron cell line (A6) was studied using the whole cell patch clamp technique. Arginine vasotocin (AVT, 140 mU/ml), evoked a "transient" increase in whole cell currents as did dibutyryl cyclic AMP (5 mm). These transients consisted of two components: one was the non-selective cation conductance and the other was the Cl- conductance. The transient was evoked by AVT in the lower cytosolic Cl- concentration ((Cl-)-i) ( lt apprx 50 mM), and was suppressed by higher concentrations of (Cl-)-i (125 mM) in A6 cells. It seems likely that the (Cl-)-i maintained at a lower level is an important requirement for A6 cells to respond to AVT.


PMID: 7752543

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