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. 2022 Mar 9;13:1225. doi: 10.1038/s41467-022-28844-1

Fig. 1. Nuclear entry of SIRT2 in OPCs during remyelination is impaired in the aged mice in vivo.

Fig. 1

a Primary culture of various types of cells from P0 rat cortex. b qRT-PCR of seven members of sirtuins in primary cultured OPCs and mature oligodendrocytes from the cortex of P0 rat (n = 3). c qRT-PCR of sirt2 in primary cultured various types of cells from the cortex of P0 rat (n = 3). d–f Immunofluorescence and quantification of SIRT2+ cells in the cortex of mice at different ages (n = 3). Scale bar, 10 μm (d), 50 μm (upper panel images of f), 5 μm (lower panel images of f). g–h Immunofluorescence of SIRT2 in the cortex of marmosets at postnatal day 3 (P3, g) or age of 8 years (h). Scale bar, 50 μm. i Immunohistochemistry of SIRT2 in the cortex of human at age of 53 years. Scale bar, 20 μm. j, k Relative SIRT2 protein level in brains of WT young (6 M) and old (18 M) mice (n = 3). l–o Immunofluorescence and quantification of SIRT2+ OPCs and nuclear SIRT2+ OPCs in corpus callosum of WT young and old mice (n = 3). NL, non-lesion, L, demyelination lesion induced by LPC at 5 dpl. Scale bar, 10 μm. All data are presented as mean ± SEM. *p < 0.05, **p < 0.01, ***p < 0.001 by two-tailed t-test (k) or one-way ANOVA followed by Tukey’s post hoc test (m–o). In all instances ***p  <  0.001. n.s. no significance. In (k), **p = 0.004; in (m), **p = 0.002 (L-Young vs. L-Old); in (n), **p = 0.007 (L-Young vs. L-Old).