HFD does not affect spontaneous inhibitory transmission to ORX or MCH neurons. (A) Representative mIPSC traces of ORX neurons from Ctrl (left) or HFD (right) rats fed for 1, 4, and 11 weeks. (B–C) Summary graphs displaying no change in the mIPSC amplitude (B; two-way ANOVA, p = 0.2618) or frequency (C; two-way ANOVA, p = 0.6794) over the course of HFD feeding compared to the Ctrl group. mIPSC amplitude decreases with age among the Ctrl groups (one-way ANOVA, p = 0.0007), while mIPSC frequency does not change (one-way ANOVA, p = 0.4699). For (A–C): †p < 0.05 for age, Sidak's multiple comparison test. n = 5–13; N = 3–5. (D) Representative mIPSC traces of MCH neurons from Ctrl (left) or HFD (right) rats fed for 1, 4, and 11 weeks. (E–F) Summary graphs displaying a lack of HFD-induced change in the mIPSC amplitude (E; two-way ANOVA, p = 0.2401) and frequency (F; two-way ANOVA, p = 0.2339) throughout the feeding period. In Ctrl groups, there were also no age-dependent changes in mIPSC amplitude (one-way ANOVA, p = 0.1879) or frequency (one-way ANOVA, p = 0.7971). For (D–F): n = 7–12 cells; N = 3–4 rats.