Journal: bioRxiv
Article Title: Hierarchical regulation of cerebellar neurogenesis by Sin3A-mediated gene repression
doi: 10.1101/2025.10.17.683101
Figure Lengend Snippet: (A) Venn diagram illustrating the identification of genomic loci directly regulated by the Sin3A/Hdac1 complex. (B) Heatmap and average intensity plots illustrating the H3K27ac ChIP-seq signal profiles surrounding 3439 genomic loci directly regulated by the Sin3A/Hdac1 complex in isolated GCP from both control and Sin3A CKO mice. (C) Selected motifs exhibit significant enrichment at genomic loci that are directly regulated by the Sin3A/Hdac1 complex. (D) Immunofluorescence staining for Atoh1-GFP and NeuroD1 at P6 in the cerebellum of control and Sin3A CKO mice. Scale bar indicates 250 μm. (E) Venn diagram illustrating the overlaps of Sin3A, Hdac1 and NeuroD1 binding sites in the genome of wild type cerebellum. (F) ChIP-seq tracks (fold changes of ChIP-seq signal relative to IgG) depicting the intensity of Sin3A, Hdac1, NeuroD1, and H3K27ac occupation at Atoh1 locus in the GCP of control, Sin3A CKO , and NeuroD1 LacZ/LacZ mice. The italicized text to the left of each track denotes the genotype of the mice used in ChIP-seq experiments, absence of genotype annotation indicates a wild-type animal. (G) Immunoblots for NeuroD1, Sin3A and Hdac1 binding in P7 cerebellum of wild-type mice. Lane 1-3: cell lysate of P7 cerebellum. Lane 4: Co-immunoprecipitation of rabbit IgG in cell lysate of P7 cerebellum. Lane 5: Co-immunoprecipitation of NeuroD1 in cell lysate of P7 cerebellum. (H) Immunofluorescence staining for Atoh1-GFP, NeuN, and Ki67 at P6 in the cerebellum of control and NeuroD1 LacZ/LacZ mice. Nuclei were counterstained with DAPI. Scale bar indicates 20 μm. (I) Boxplot showing the quantification of the relative fluorescence intensity of GFP in EGL cells of control and NeuroD1 lacZ/lacZ mice. Two-tailed t test: **** p ≤ 0.0001. n= 200 cells per group. (J) smFISH analysis showing the transcription levels of Atoh1 in the EGL of wild type and NeuroD1 lacZ/lacZ mice. Nuclei were counterstained with DAPI. Scale bar indicates 20 μm. (K) Quantification of the count of Atoh1 transcripts per 100 square micrometers in the EGL of wild type and NeuroD1 lacZ/lacZ mice. Shown are mean ± SEM. Two-tailed t test: ** p≤ 0.01. n= 3 mice per group. (L) Heatmap and average intensity plots of the H3K27ac ChIP-seq signals across 10 Kb from the center of Sin3A/Hdac1/NeuroD1 binding sites throughout the genome from isolated GCPs of control and NeuroD1 lacZ/lacZ mice.
Article Snippet: Primary antibodies used in this study are listed below: GFP (1:1000, Aves Labs, cat#: GFP-1020), Ki67 (1:1000, Thermo Fisher Scientific, cat#: 14-5698-82), Cdkn1b (1:500, Cell Signaling Technology, cat#: 3698), NeuroD1 (1:1000, Cell Signaling Technology, cat#: 62953), Sin3A (1:200, Novus Biologicals, cat#: NB600-1263), Sox2 (1:500, Thermo Fisher Scientific, cat#: 740013T), Ccnd1 (1:300, Cell Signaling Technology, cat#: 55506), Cleaved Caspase-3 Asp175 (1:200, Cell Signaling Technology, cat#: 9664), Cre Recombinase (1:500, Cell Signaling Technology, cat#: 15036), NeuN (1:500, Cell Signaling Technology, cat#: 24307).
Techniques: ChIP-sequencing, Isolation, Control, Immunofluorescence, Staining, Binding Assay, Western Blot, Immunoprecipitation, Fluorescence, Two Tailed Test