Journal: Frontiers in Cellular Neuroscience
Article Title: Heterogeneous CaMKII-Dependent Synaptic Compensations in CA1 Pyramidal Neurons From Acute Hippocampal Slices
doi: 10.3389/fncel.2022.821088
Figure Lengend Snippet: CaMKII is involved in different adaptations in acute slices. (A) Experimental design. Slices were preincubated for 2 h with CN21 or SCR peptide and drugs were washed out for 2 h (T1 and T2 are the same as for , ). (B) Representative current traces recorded at T1 and T2 in each condition (C) Mean mEPSCs amplitudes at T1 and T2 (left) and overlaid cumulative probability curves for CN21 (center) and SCR (right), including all mEPSCs recorded during each period. Black curves: distributions at T1. Two-way ANOVA with Bonferroni correction for bar plot, random permutations for cumulative probability plots. (D) Same as panel (C) for mEPSCs frequency and interevent interval (IEI). (E) Percent changes in amplitude and decay time for τ r -binned data. Bootstrap with weighted P -values. (F) Average amplitude and decay time percent changes for slow and fast-rising groups. Bootstrap with Bonferroni correction. (G) Amplitude vs. decay time raw changes for CN21 or SCR peptide. Each point corresponds to the average change for τ r bin. Pearson correlation. (H) Frequency histograms (left) for all events recorded at T1 or T2 and probability density curve (right), in SCR condition. (I) τ r -binned frequency percent increase. (J,K) Same as (H,I) , for CN21. (L) Average frequency increase for fast and slow groups, after SCR or CN21. Bootstrap with Bonferroni correction. * p < 0.05. N = 39 neurons (SCR-T1: 11, SCR-T2: 8, CN21-T1: 8, CN21-T2: 12), from 5 rats (1–4 slices per rat).
Article Snippet: The CaMKIIN-derived peptide CN21 fused to the cell-permeable sequence tat ( ; ) and a scrambled control peptide, were obtained from Biomatik (Wilmington, DE, United States).
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