Figure 1. SK2 expression in hippocampus of AS and WT mice.
(A,B) Western blot analysis of SK2 levels in (A) crude synaptosomal fractions (P2) and (B) PSD fractions (P3). Optical densities of the SK2 band are normalized to those of β-actin or PSD-95. Data are expressed as % of values in WT mice and shown as means ± S.E.M of 9-10 (in a) or 3 mice (in b) from at least 3 litters, ***p <0.001 (unpaired t-test) and **p < 0.01 (unpaired t-test).
(C) Localization of synaptic SK2 in AS mice. Representative images of CA1 pyramidal neurons stained with anti-SK2 (red) and -PSD95 (green) antibodies. Arrowheads indicate clearly co-localized puncta. Left panel, scale bar = 20 μm. Right panel, scale bar = 10 μm.
(D) Quantitative analysis of the number of SK2-immunoreactive puncta and percentage of SK2 and PSD95 dually stained puncta/synapses in hippocampal CA1 region. N = 18-24 regions of interest from at least 9 slices from at least 3 mice per group (unpaired t-test, ***p<0.001). See also Figure S1.