The NHE3 inhibitor AVE1599 stimulates phrenic nerve activity in the rat.

The effect of AVE1599, an inhibitor of the sodium/proton exchanger type 3 (NHE3), on phrenic nerve (PN) activity was investigated using the working heart brainstem preparation (WHBP). Hypercapnia (Delta pH: -0.1) applied for 10 min reversibly increased PN frequency (f) by 66.