Figure 4. β-Catenin and GD2 expression in MSCs from young and old rats.

The immunofluorescence staining results show that the β-catenin expression is very weak in the young GD2–positive cells, but clearly increased in old GD2–positive cells. The arrow indicates the old cells co-expressed with β-catenin and GD2. Red, β-catenin; green, GD2; blue, DAPI. Scale bar  = 25 µm.