Figure 1: Different shapes of S100B-IR cells in brain coronal sections of adult male rats. The expression of S100B along the rostrocaudal axis revealed cells that had different cellular morphology. Bright-field photomicrographs showing the different shapes of S100B-IR cells. (a1) and (a2): S100B-IR Bergman cells that have an irregular shape, (b1): S100B-IR ependymal cell that have a rounded shape, (c1): S100B-IR astrocytes that have an oval shape. (c2): S100B-IR astrocytes that have few cytoplasmic ramifications. (a), (b), and (c): Nissl staining. Scale bars, 100 μm in (a1), (a2), (b1), (b2), (c1) and (c2); 20 μm in (a), (b) and (c)