Isolation, cell aggregate formation, and induction of CD9-positive cells from the marginal cell layer of the intermediate lobe (IL) in the pituitary gland of adult male rats. (A)
Schematic of hanging drop 3D culture using isolated CD9-positive cells and subsequent induction procedures. (B) Double immunofluorescence staining for CD9 (left panels) and SOX2 (middle
panel), and a merged image with DAPI staining (right panel) in smears of CD9-positive cells. (C) Bright fields images after 2 and 3 days of hanging drop 3D culture. (D) Double
immunofluorescence staining for CD9 (left panels) and SOX2 (middle panel), and a merged image with DAPI staining (right panel) of cell aggregates obtained from hanging drop 3D cell
culture. PL, posterior lobe. Scale bars: 20 μm (B, C and D).