The role of Arid4b in mESC lineage commitment
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ABSTRACT:
PROVIDER: PRJNA643516 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR12125810.fastq.gz | Fastqsanger.gz | |||
| SRR12125811.fastq.gz | Fastqsanger.gz | |||
| SRR12125812.fastq.gz | Fastqsanger.gz | |||
| SRR12125813.fastq.gz | Fastqsanger.gz | |||
| SRR12125814.fastq.gz | Fastqsanger.gz |
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Project description:The role of Arid4b in mESC lineage commitment (RNA-Seq)
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Project description:The role of Arid4b in mESC lineage commitment (ChIP-Seq)
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Project description:Distinct cell types emerge from embryonic stem cells through a precise and coordinated execution of gene expression programs during lineage commitment. This is established by the action of lineage specific transcription factors along with chromatin complexes. Numerous studies focused on epigenetic factors that affect ESC self-renewal and pluripotency. However, the contribution of chromatin to lineage decisions at the exit from pluripotency has not been studied extensively. We have set out to identify chromatin related factors critical for differentiation towards mesodermal and endodermal lineages. Our results reveal a critical role for chromatin protein, Arid4b. Arid4b deficient mESCs are similar to wild-type mESCs in the expression of pluripotency factors and their self-renewal. However, we found that Arid4b loss results in defects in upregulation of meso/endodermal gene expression program. Arid4b is in the Sin3a complex along with Hdac1 and Hdac2. We identified a physical and functional interaction of Arid4b with Hdac1 rather than Hdac2. Arid4b deficiency leads to changes in the overall chromatin environment. Most notably, a subset of the genomic loci was found to gain H3K27Ac whereas several of the key developmental genes instead have increased H3K27me3 levels. Accordingly, the super-enhancers associated with meso/endoderm commitment were selectively reduced in arid4b∆ cells.
2020-10-20 | GSE153634 | GEO
Project description:Distinct cell types emerge from embryonic stem cells through a precise and coordinated execution of gene expression programs during lineage commitment. This is established by the action of lineage specific transcription factors along with chromatin complexes. Numerous studies focused on epigenetic factors that affect ESC self-renewal and pluripotency. However, the contribution of chromatin to lineage decisions at the exit from pluripotency has not been studied extensively. We have set out to identify chromatin related factors critical for differentiation towards mesodermal and endodermal lineages. Our results reveal a critical role for chromatin protein, Arid4b. Arid4b deficient mESCs are similar to wild-type mESCs in the expression of pluripotency factors and their self-renewal. However, we found that Arid4b loss results in defects in upregulation of meso/endodermal gene expression program. Arid4b is in the Sin3a complex along with Hdac1 and Hdac2. We identified a physical and functional interaction of Arid4b with Hdac1 rather than Hdac2. Arid4b deficiency leads to changes in the overall chromatin environment. Most notably, a subset of the genomic loci was found to gain H3K27Ac whereas several of the key developmental genes instead have increased H3K27me3 levels. Accordingly, the super-enhancers associated with meso/endoderm commitment were selectively reduced in arid4b∆ cells.
2020-10-20 | GSE153633 | GEO
Project description:This SuperSeries is composed of the SubSeries listed below.
2020-10-20 | GSE153635 | GEO
Project description:High Arid4b promotes mammary tumor growth and metastasis in mouse model systems, and is associated with poor metastasis-free survival in human breast cancer patients. Through shRNA-mediated knockdown, we demonstrated that loss of Arid4b significantly inhibits the ability of mouse breast cancer cells to metastasize to the lungs. We performed microarray expression and subsequent network analysis to identify genes diferentially regulated as a consequence of Arid4b knockdown. The highly metastatic mouse breast cancer cell line 6DT1 was transduced with lentiviral shRNAs targeting Arid4b (RMM4534-NM_194262, Open Biosystems) or scrambled control in the same pLKO.1 vector backbone. Stably transduced cells were selected with puromycin, then total RNA was isolated from pooled clones.
2012-04-23 | E-GEOD-35731 | biostudies-arrayexpress
Project description:Khajuria RK, Munschauer M, Ulirsch JC, Fiorini C, Leif S. Ludwig LS, McFarland SK, Abdulhay NJ, Specht H, Keshishian H, Mani DR, Jovanovic M, Ellis SR, Fulco CP, Engreitz JM, Schütz S, Lian J, Gripp KW,Weinberg OK, Pinkus GS, Gehrke L, Regev A, Lander ES, Gazda HT, Lee WY, Panse VG, Carr SA, Sankaran VG. Cell 2018, 173, 90–103. https://doi.org/10.1016/j.cell.2018.02.036.
Blood cell formation is classically thought to occur through a hierarchical differentiation process, although recent studies have shown that lineage commitment may occur earlier in hematopoietic stem and progenitor cells (HSPCs). The relevance to human blood diseases and the underlying regulation of these refined models remain poorly understood. By studying a genetic blood disorder, Diamond-Blackfan anemia (DBA), where the majority of mutations affect ribosomal proteins and the erythroid lineage is selectively perturbed, we are able to gain mechanistic insight into how lineage commitment is programmed normally and disrupted in disease. We show that in DBA, the pool of available ribosomes is limited, while ribosome composition remains constant. Surprisingly, this global reduction in ribosome levels more profoundly alters translation of a select subset of transcripts. We show how the reduced translation of select transcripts in HSPCs can impair erythroid lineage commitment, illuminating a regulatory role for ribosome levels in cellular differentiation.
2016-10-24 | MSV000080283 | MassIVE
Project description:B lymphopoiesis is a key developmental event orchestrated by a complex combinatorial action of lineage-specific transcription factors. In early B cell progenitors, lineage commitment is directly mediated by the master regulator PAX5, whose deficiency is commonly associated with B cell Acute Lymphoblastic Leukemia (B-ALL). Despite its essential role in mammalian immunity, the regulatory mechanisms that control PAX5 function remain largely unknown. Here we show that NAD+-dependent enzyme SIRT7 coordinates B cell development progression through PAX5. We have identified a SIRT7-dependent regulatory switch based on dynamic deacetylation of a single PAX5 residue, which controls its activity and thereby B cell fate. While a PAX5K198 acetylated mimic is incapable of inducing both B cell development and identity due to reduced protein stability and impaired binding to chromatin, deacetylation of this residue boosts PAX5 activity, leading to massive gene repression and in vivo restoration of B cell commitment but not differentiation. These findings suggest an unexpected uncoupling of hematopoietic differentiation and lineage commitment. Further supporting the functional relevance of the SIRT7-PAX5 axis, the interplay between both factors is conserved in human B-ALL, where high SIRT7 expression is an independent good prognostic factor. Our findings unveil a crucial mechanism in the regulation of B cell production based on the control of PAX5 function and underscore the key role of Sirtuins in the regulation of the immune system.
2024-09-20 | PXD046457 | Pride
Project description:Epigenome regulation during epidermal lineage commitment
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Project description:Gene expression heterogeneity in the pluripotent state of mouse embryonic stem cells (mESCs) has been increasingly well-characterized. In contrast, exit from pluripotency and lineage commitment have not been studied systematically at the single-cell level. Here we measured the gene expression dynamics of retinoic acid driven mESC differentiation using an unbiased single-cell transcriptomics approach. We found that the exit from pluripotency marks the start of a lineage bifurcation as well as a transient phase of susceptibility to lineage specifying signals. Our study revealed several transcriptional signatures of this phase, including a sharp increase of gene expression variability and a handover between two classes of transcription factors. In summary, we provide a comprehensive analysis of lineage commitment at the single cell level, a potential stepping stone to improved lineage control through timing of differentiation cues.
2017-10-23 | GSE79578 | GEO