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Dynamics of chromatin and transcriptome in the HSPCs at different hematopoietic developmental stages [RNA-seq]

ABSTRACT: ATAC-seq and RNA-seq were used to compare the chromatin states and corresponding transcriptomes of developing HSPC. We found that the chromatin states and transcriptomes change markedly when HSPCs migrate from PL to FL and from FL to BM. Then we compared chromatin among E12.5 PL, E12.5 FL, and E16.5 FL, the proportion of fragments in the nucleosome-free region significantly increases in E12.5 and E16.5 FL-HSPCs compared with E12.5 PL-HSPCs; the motifs of ETS and Runt are enriched at the opeing or closing peaks from E12.5 PL to E12.5 FL and E12.5 FL to E16.5 FL, and the expression of these factors is either up-regulated or down-regulated; the motifs of bZIP and Zf are enriched at the closing and opening peaks from E12.5 PL to E12.5 FL and E12.5 FL to E16.5 FL respectively, In line, the expression of these factors is down-regulated or up-regulated.

ORGANISM(S): Mus musculus

PROVIDER: GSE165053 | GEO | 2024/01/15

REPOSITORIES: GEO

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Dynamics of chromatin and transcriptome in the HSPCs at different hematopoietic developmental stages [ATAC-seq]

Project description:ATAC-seq and RNA-seq were used to compare the chromatin states and corresponding transcriptomes of developing HSPC. We found that the chromatin states and transcriptomes change markedly when HSPCs migrate from PL to FL and from FL to BM. Then we compared chromatin among E12.5 PL, E12.5 FL, and E16.5 FL, the proportion of fragments in the nucleosome-free region significantly increases in E12.5 and E16.5 FL-HSPCs compared with E12.5 PL-HSPCs; the motifs of ETS and Runt are enriched at the opeing or closing peaks from E12.5 PL to E12.5 FL and E12.5 FL to E16.5 FL, and the expression of these factors is either up-regulated or down-regulated; the motifs of bZIP and Zf are enriched at the closing and opening peaks from E12.5 PL to E12.5 FL and E12.5 FL to E16.5 FL respectively, In line, the expression of these factors is down-regulated or up-regulated.

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Effect of NKD1, NKD2 and O2 on Chromatin Accessible Regions

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Project description:HOXA7 regulates FL-HSPC self-renewal in vitro and in vivo. We profiled FL-HSPCs after HOXA7 knockdown, to assess the gene expression programs regulated by HOXA7.

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Project description:The transcription factor Pax6 is comprised of the paired domain (PD) and homeodomain (HD). In the developing forebrain, Pax6 is expressed in ventricular zone precursor cells and in specific subpopulations of neurons; absence of Pax6 results in disrupted cell proliferation and cell fate specification. Pax6 also regulates the entire lens developmental program. To reconstruct Pax6-dependent gene regulatory networks (GRNs), ChIP-seq studies were performed using lens and forebrain chromatin from mice. A total of 3,723 (forebrain) and 3,514 (lens) Pax6-containing peaks were identified, with ~70% of them found in both tissues and thereafter called “common” peaks. Analysis of Pax6-bound peaks identified motifs that closely resemble Pax6-PD, -PD/HD and -HD established binding sequences. Mapping of H3K4me1, H3K4me3, H3K27ac, H3K27me3 and RNA polymerase II revealed distinct types of tissue-specific enhancers bound by Pax6. Pax6 directly regulates cortical neurogenesis through activation (e.g. Dmrta1 and Ngn2) and repression (e.g. Ascl1, Fezf2, and Gsx2) of transcription factors. In lens, Pax6 directly regulates cell cycle exit control via components of FGF (Fgfr2, Ccnd1, and Prox1) and Wnt (Dkk3, Wnt7a, Lrp6, Bcl9l, and Ccnd1) signaling pathways. Collectively, these studies provide genome-wide analysis of Pax6-dependent GRNs in lens and forebrain and establish novel roles of Pax6 in organogenesis. Examination of Pax6 in mouse embryonic forebrain and newborn lens. We performed ChIP-seq on mouse E12.5 embryonic forebrain and newborn lens. Genome-wide binding sites of Pax6, H3K4me1, H3K4me3, H3K27ac, H3K27me3, and Pol2 were generated. We also performed RNA-seq on mouse E12.5 embryonic forebrain and newborn lens epithelial cells and fibers.

2015-07-09 | E-GEOD-66961 | biostudies-arrayexpress

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