Fig. 4. MAOB and GABA levels in the striatum are reduced in astrocyte-specific MAOB cKO mice. (A) Experimental scheme and timeline using Maob floxed::hGFAP-CreERT2 mice. (B) Representative confocal images of MAOB (green), S100β (magenta) in coronal slices of striatum in sunflower oil-injected MAOB control and tamoxifen-injected MAOB cKO mice. (C) Quantification of MAOB intensity in S100β-positive cells in the striatum (MAOB control, 130316 voxels; MAOB cKO, 89368 voxels; Mann-Whitney test, p<0.0001). (D) Quantification of MAOB intensity in S100β-negative areas in the striatum (MAOB control, 75 pixels; MAOB cKO, 73 pixels; Mann-Whitney test, p=0.5655). (E) Representative SIM images of MAOB (green) and S100β (magenta) in coronal slices of striatum in MAOB control (left) and astrocytic MAOB cKO mice (right). White boxes, magnified regions. Insets, magnified and rotated 3D images. (F) Representative images for GABA (green), S100β (magenta) and DAPI (blue) in coronal slices of striatum in MAOB control and astrocytic MAOB cKO mice. (G) Quantification of GABA intensity in S100β-positive cells in the striatum (MAOB control, 28 voxels; MAOB cKO, 30 voxels; Unpaired t test, p<0.01. (H) Quantification of GABA intensity in S100β-negative areas in the striatum (MAOB control, 85 pixels; MAOB cKO, 75 pixels; Mann-Whitney test, p=0.1110). In violin plots, the center line denotes the median value, while upper and lower lines denote the first quartile and third quartile, respectively. Data are presented as mean±SEM. ****p<0.0001; **p<0.01; n.s., not significant.
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