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. 2017 Nov 22;8:860. doi: 10.3389/fphar.2017.00860

FIGURE 7.

FIGURE 7

Effect of ivermectin on ATP-induced currents of hP2X4/hP2X7-coexpressing oocytes. (A–C) Two-electrode voltage clamp measurements showing the effect of ivermectin (3 μM) on ATP-induced currents of oocytes expressing (A) hP2X4, (B) hP2X7, or (C) hP2X4 + hP2X7. Oocytes were incubated for 1 min with 3 μM ivermectin, and then with 3 μM ivermectin + 0.1 mM ATP. (D) Current amplitudes measured in P2X4/P2X7-coexpressing oocytes during ivermectin application were compared with the sum of the P2X4- and P2X7-dependent current amplitudes (as shown in parts A,B, respectively). Mean current amplitudes were not significantly different at any time point, indicating the lack of a distinct P2X4/P2X7 phenotype related to ivermectin. This may be explained by ivermectin affecting only homomeric P2X4 receptors. Data are the means ± SD from 4–6 oocytes.