Fig 1: Cortical layering deficits in Tubb2a and Tubb2b deletion mutants.Immunohistochemistry for NeuN (A-E), CTIP2 (F-J), TBR1 (K-T) and myelin basic protein (MBP, U-II) highlights multiple phenotypes in Tubb2ad3963/d3963 (B,G,L,Q,V,AA,FF), Tubb2ad4222/d4222 (C,H,M,R,W,BB,GG) and Tubb2bd4185/d4185 (E,J,O,T,Y,DD,II) homozygous mice as compared to wild-type (A,D,F,I,K,N,P,S,U,X,Z,CC,EE,HH). (A-E) NeuN staining for differentiated neurons. (F-J) CTIP2-positive upper layer neurons. (K-T) TBR1-positive lower layer neurons. (U-II) MBP immunoreactivity indicates severe loss of axon tracts in the corpus callosum (AA, BB) and pyramidal fiber tracts (FF, GG) of the Tubb2a deletion, but not the Tubb2b deletion (DD,II). Box and asterisk in U indicate areas shown in Z and EE, respectively. Scale bars indicate 100 μm (A-T), 1 mm (U-Y), 200 μm (Z-DD) and 500 um(EE-II).
Fig 2: Expression of BCL11B in HRGECs transfected with the miR-650 mimic, mock or inhibitor. (A) The expression of BCL11B was determined by immunofluorescence analysis. (B) Western blot analysis was performed to measure the protein expression of caspase-8 and BCL11B. BCL11B, B-cell CLL/lymphoma 11B; HRGEC, human renal glomerular endothelial cell; miR, microRNA.
Fig 3: Tle4 is required perinatally to maintain CThPN identity during thalamic innervation(A–B′) Fezf2 ISH and CTIP2 immunolabeling (C–E) in Ntsr1-Cre:tdTomatofl:Tle4fl/fl mice.(B′ and B″) Ntsr1-Cre expression limit between somatosensory and motor cortices (white arrow). Magnified insets from boxed areas in low-magnification images. (F and H) SCPN labeling approach by FB injection into pyramidal tract (P3). Analysis (P7) in somatosensory cortex.(G–I) Presence of SCPN (FB+) in LVI and LVex in Ntsr1-Cre:tdTomatofl:Tle4fl/fl mutants, but not in tdTomatofl:Tle4fl/fl controls.(J) Distribution of SCPN (FB+) across cortical thickness; n = 4 mice per genotype. Mean FB+ cells/bin ± SEM; ANOVA-Tukey, **p < 0.01.(K and L) In Ntsr1-Cre:tdTomatofl:Tle4fl/fl mice, reprogrammed SCPN (tdTomato+-FB+ in LVex and LVI) upregulate CTIP2 (solid arrowheads) and downregulate FOG2 (open arrowheads).(M–O) Quantification of tdTomato+ axons from Ntsr1-Cre-expressing neurons in pyramidal tract at P28 (n = 3 per genotype, unpaired t test, **p < 0.01). Error bars, SEM.Scale bars, 500 μm (A–D); 250 μm (G and I); 20 μm (E′–E″′, K, L, and M′); 1 mm (M).
Fig 4: Gene and Protein Expression for Bcll11b.(A) Gene expression for Bcl11b in control striatal STHdh cells (CTL, open bars) and HPRT-knockdown (HPRTKD, closed bars). Bars represent mean ±SEM (n = 4). mRNA expression is normalized to GAPDH RNA level (*P<0.05, t-test). (B) Immuno-blot and quantification of Bcl11b protein expression in striatal cells. The quantification bar graphs are shown as means ± SEM (n = 3, *P<0.05, t-test). (C) Gene expression of Actn2, Arpp19, Foxp1, Ngef, Pde10a, and Rgs9 in control (CTL, open bars) and HPRT knockdown (HPRTKD, closed bars) striatal STHdh cells. Bars represent mean ±SEM (n = 4). *P<0.05, t-test. (D) Gene expression for Bcl11b in the striatum of wild-type (WT, open bars) and HPRT knockout (HPRTKO, closed bars) mice. Bars represent mean ±SEM (n = 4). mRNA expression is normalized to GAPDH RNA level (*P<0.05, t-test). (E) Immuno-blot and quantification of Bcl11b protein expression in the striatum of WT and HPRTKO mice. The quantification bar graphs are shown as means ± SEM (n = 3, *P<0.05, t-test). (F) Gene expression for Actn2, Arpp19, Foxp1, Ngef, Pde10a, and Rgs9 in control (Wild-type, open bars) and HPRT knockout mice (HPRTKO, closed bars) striatum. Bars represent mean ±SEM (n = 4). *P<0.05, t-test.
Fig 5: Brain regions analyzed. Coronal, thionin-stained, hemi-sections of the cerebral hemisphere at the level of the (A) frontal, (B) parietal, (C) temporal, and (D) occipital lobe. Cerebral cortex (Cx; regions outside the dashed line) was examined for all histological and immunohistochemical analysis. Measurements were made in the cerebral cortex (squares indicate fields of view; 4 bins analyzed per square for NeuN; 3 bins analyzed per square for Ctip2; whole square without bins analyzed for SST). A total of 6 fields of view was analyzed from the striatum, with 3 fields of view selected from the caudate nucleus and 3 fields from the putamen (B). Cx, cortex; CC, corpus callosum; Hi, hippocampus; St, striatum; SVZ, subventricular zone; CN, caudate nucleus; Pu, putamen; MB, midbrain.
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