Fig. 7From: Tsc1 haploinsufficiency in Nkx2.1 cells upregulates hippocampal interneuron mTORC1 activity, impairs pyramidal cell synaptic inhibition, and alters contextual fear discrimination and spatial working memory in miceChronic rapamycin treatment reversed the deficit in synaptic inhibition. a Diagram of experimental paradigm of chronic i.p. treatment of Nkx2.1Cre/wt;Tsc1f/wt mutant and Nkx2.1Cre/wt control mice with 5 mg/kg rapamycin (or vehicle) and recording of synaptic inhibition of pyramidal cells by Nkx2.1 interneurons. b Representative western blots and summary graph showing reduced phosphorylation of ribosomal protein S6 (p-S6; relative to total S6) in hippocampal lysates obtained 24 h after 5-day treatment of control mice with rapamycin or vehicle (n = 3 separate experiments in each group; unpaired t test, ***p < 0.001). c, d Representative traces (c) and summary graph (d) of input-output function of IPSCs evoked in CA1 pyramidal cells in slices from Nkx2.1Cre/wt;Tsc1f/wt mutant (red) and Nkx2.1Cre/wt control (black) mice that received vehicle (filled symbols) or rapamycin (open symbols). Chronic treatment with rapamycin reversed the reduction of IPSC amplitude in mutant relative to control mice (n = 9 cells in 4 animals for vehicle-treated and 7 cells in 3 animals for rapamycin-treated Wt mice (Nkx2.1Cre/wt;Tsc1wt/wt); n = 6 cells in 2 animals for vehicle-treated and 5 cells in 4 animals in rapamycin-treated Tg mice (Nkx2.1Cre/wt;Tsc1f/wt); 3-way ANOVA, Bonferroni tests, ***p < 0.001)Back to article page