Figure 6.
P2Y-receptor–dependent conductance is permeable to Ca2+ and is amplified by phenylarsine oxide. (A) Representative ADP-evoked [Ca2+]i (top panel) increase and whole cell membrane currents at –70 mV in 0 Na+ (NMDG+), 0 Mg2+, 2.5 mM Ca2+ saline with 1 μM NF449. (B) Effect of a 2-minute preexposure to 15 μM phenylarsine oxide on the ADP-evoked membrane currents. (C) Average peak ADP-evoked currents in normal saline (150 mM Na, 1 mM Ca2+) and 2.5 mM Ca2+ saline (0 Na+, 0 Mg2+) with and without pretreatment of 15 μM PAO or 100 μM vanadate. Error bars indicate SEM. *Statistical significance of P < .05 when compared with control.