Fig. 4.
Antagonism of TAAR1 by N-(3-Ethoxyphenyl)-4-(1-pyrrolidinyl)-3-(trifluoromethyl)benzamide (EPPTB) reversed acute effects of methamphetamine (Meth) on suppressing IKv. (a) Sample traces from human fetal astrocytes (from the left to right) at control condition, treated with Meth (20 μM), or with Meth (20 μM) plus EPPTB (25 nM). The vertical dashed lines indicate the time points at which the currents were measured. (b) The I-V curves show that combined treatment of EPPTB and Meth reversed the Meth-induced decrease in IKv (Control vs. Meth and Meth + EPPTB: n = 22/18 vs. 19/12 and 9/4 cells/independent experiments, respectively; Two-way rmANOVA: treatment: F(2,47) = 1.786, p = 1.786; voltage: F(15,705) = 155.7, p < 0.001; interaction: F(30,705) = 2.112, p < 0.001; with Tukey’s post hoc test: Control vs. Meth, *p < 0.05; Control vs. Meth + EPPTB, #p < 0.05; Meth vs. Meth + EPPTB: +,++,+++p < 0.05, 0.01 or 0.001).