FIGURE 3.

Comparative effects of activation of PAR2 and vasopressin V2 receptor on transepithelial voltage in rat cTAL. A, representative traces showing the effect on PD_te of the successive addition of vasopressin (AVP, 200 pm) followed by Try (10 nm)(left trace) or trypsin followed by AVP (right trace). B, mean variation of PD_te, calculated between the PD_te values at the peak response and at the time of trypsin (dark columns) or AVP (hatched columns) addition. Left panel, the addition of AVP followed by trypsin; right panel, the addition of trypsin followed by AVP. Values are means ± S.E. from 5–6 cTALs. *, p < 0.01 between the two experimental series.