Analysis of neurogenesis in peri-infarct cortex at D21. (a) Glial
fibrillary acidic protein (GFAP) and Musashi-1 (Msi-1) double
staining. Scale bar = 50 µm. IC: infarct core. (b) The number of
Msi-1-positive neural stem cells at the peri-infarct cortex at D21
was significantly larger in the young human mesenchymal stem cells
(hMSC) group than in controls and the old hMSC group (one-way ANOVA,
Tukey–Kramer multiple comparison test,
**P < 0.01). (c) The direction index was
significantly correlated with the number of Msi-1-positive cells
migrating close to the infarct core (R = 0.2683 and
P < 0.01, Spearman). (d) The direction index
of the young hMSC group was significantly higher than in the old
hMSC group (one-way ANOVA, Tukey–Kramer multiple comparison test,
*P < 0.05). Data are presented as
mean ± SD.