Table 2

cAMP, PLC, and PLD responses to VIP in CHO cells expressing VPAC1 and VPAC2 receptors

VPAC1VPAC2
EC50EmaxEC50Emax
nM fold of basal nM fold of basal
cAMP Production0.065  ± 0.01359  ± 10.123  ± 0.016118  ± 3
[3H]InsP productionnil at 3 μMnil at 3 μM
[3H]PtdBut production6.2  ± 2.51.83  ± 0.295.3  ± 1.22.79  ± 0.46