Figure 4. In vitro chronic CORT treatment reduces AMPAR synaptic currents and synaptic GluR1 clusters via GR activation.
(A, B) Bar graphs showing the effect of different durations (A) and concentrations (B) of CORT on mEPSC. *: p<0.01, #: p<0.05, ANOVA. (C, D) Representative mEPSC traces (C) and statistic summary (D) showing the effect of CORT (100 nM, 7-day) on mEPSC amplitude and frequency in the presence of GR or MR antagonists in cultured PFC neurons (DIV28–30). Scale bars: 50pA, 1s. *: p<0.01, #: p<0.05, t test. (E) Immunostaining of total GluR1 and PSD-95 in PFC cultures treated with or without CORT (100 nM, 7-day). (F) Bar graphs showing the cluster density of synaptic GluR1 (co-localized, yellow puncta), total GluR1 (red puncta) and PSD-95 (green puncta) in response to CORT treatment. *: p<0.01, t test.