p110γ inhibition impairs GIP-potentiated exocytosis from mouse β-cells.
A, representative capacitance recordings (left panel) and averaged cumulative capacitance responses (right panel) from mouse β-cells treated overnight with vehicle DMSO (gray lines, open circles) or AS604850 (1 μmol/liter; black lines, black circles). B, shows the same as A, except cells were additionally treated with GIP (100 nmol/liter; 1 h). C, shows the same as A, except cells were additionally treated with Ex-4 (100 nmol/liter; 1 h). *, p < 0.5; **, p < 0.01.