From pioneer to repressor: Bimodal foxd3 activity dynamically remodels neural crest regulatory landscape in vivo
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ABSTRACT:
PROVIDER: PRJNA417594 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR6267980_1.fastq.gz | Fastqsanger.gz | |||
| SRR6267980_2.fastq.gz | Fastqsanger.gz | |||
| SRR6267990_1.fastq.gz | Fastqsanger.gz | |||
| SRR6267990_2.fastq.gz | Fastqsanger.gz | |||
| SRR6268000_1.fastq.gz | Fastqsanger.gz |
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Project description:The neural crest (NC) is a transient embryonic stem cell population characterised by its multipotency and broad developmental potential. Here, we perform NC-specific transcriptional and epigenomic profiling of foxd3-mutant versus wild-type cells in vivo to define the gene regulatory circuits controlling NC specification. Together with global binding analysis obtained by foxd3 biotin-ChIP and single cell profiles of foxd3-expressing premigratory NC, our analysis shows that during early steps of NC formation, foxd3 acts globally as a pioneer factor to prime the onset of genes regulating NC specification and migration by re-arranging the chromatin landscape, opening cis-regulatory elements and reshuffling nucleosomes. Strikingly, foxd3 then gradually switches from an activator to its previously well-described role as a transcriptional repressor. Taken together, these results demonstrate that foxd3 acts bimodally in the neural crest as a switch from ‘permissive’ to ‘repressive’ nucleosome/chromatin organisation to maintain multipotency and define cell fates.
2018-12-07 | GSE106676 | GEO
Project description:The neural crest (NC) is a transient embryonic stem cell-like population characterized by its multipotency and broad developmental potential. Here, we perform NC-specific transcriptional and epigenomic profiling of foxd3-mutant cells in vivo to define the gene regulatory circuits controlling NC specification. Together with global binding analysis obtained by foxd3 biotin-ChIP and single cell profiles of foxd3-expressing premigratory NC, our analysis shows that, during early steps of NC formation, foxd3 acts globally as a pioneer factor to prime the onset of genes regulating NC specification and migration by re-arranging the chromatin landscape, opening cis-regulatory elements and reshuffling nucleosomes. Strikingly, foxd3 then gradually switches from an activator to its well-described role as a transcriptional repressor and potentially uses differential partners for each role. Taken together, these results demonstrate that foxd3 acts bimodally in the neural crest as a switch from "permissive" to "repressive" nucleosome and chromatin organization to maintain multipotency and define cell fates.
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Project description:Repeat element transcription plays a vital role in early embryonic development. Upregulation of repeats such as MERVL characterises the 2 cell-like population in a mouse embryonic stem cell culture. Repeat element sequences contain binding sites for numerous transcription factors. We identify a the forkhead domain transcription factor FOXD3 as a regulator of repeat element transcription. FOXD3 binds to and recruits the histone methyl transferase Suv39h1 to MERVL and major satellite repeats in mouse embryonic stem cells, consequentially repressing the transcription of these repeats by establishment of the H3K9me3 heterochromatin modification. Notably, depletion of Foxd3 leads to the de-pression of MERVL and major satellite repeats and in turn the activation of a subset of genes expressed in the 2 cell state, shifting the balance between the stem cell and 2 cell-like population in culture. Thus FOXD3 acts as a negative regulator of repeat transcription, ascribing a novel function to this transcription factor.
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Project description:The transcription factor forkhead box D3 (FoxD3) is a transcriptional factor which belongs to forkhead box (Fox) transcription factor family. The functions of FOXD3 in embryogenesis and in the development of neural crest cells have been clearly defined. Its tumor suppressor function hasbeen found in many types of cancer in recent years. However, the study about its roles in lung cancerdevelopment is still lacking. Our study found that deficiency of FoxD3 in lung cancer enhanced cell growth and cell invasion. RNA-sequence analysis demonstrated that loss of FoxD3 mainly affected cell cycle progression related gene expression. Knockdown of FoxD3 led to G2-M cell accumulation with up-regulation of DNA replication licensing factor MCM5 and MCM4 as well as cell cycle regulator polo-like kinase-1 (PLK1) and CDC6. Over-expression of those genesin lung cancer was associated with poor clinical outcomes of lung cancer patients. We also identified high mobility group box-1(HMGB1), Hras and Ephrin B1 gene expression increase after FoxD3 silencing which may participate in enhanced lung cancer cell invasion. Our study identifiedtumor suppressor function of FoxD3 in lung cancer andwe did the first comprehensive analysis of the genes regulated by FoxD3 for cell proliferation and invasion in lung cancer. The identified genes regulated by FoxD3 through our analysis will provide valuable information to uncover the mechanism of FoxD3 tumor suppressor function.
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Project description:The transcription factor forkhead box D3 (FoxD3) is a transcriptional factor which belongs to forkhead box (Fox) transcription factor family. The functions of FOXD3 in embryogenesis and in the development of neural crest cells have been clearly defined. Its tumor suppressor function hasbeen found in many types of cancer in recent years. However, the study about its roles in lung cancerdevelopment is still lacking. Our study found that deficiency of FoxD3 in lung cancer enhanced cell growth and cell invasion. RNA-sequence analysis demonstrated that loss of FoxD3 mainly affected cell cycle progression related gene expression. Knockdown of FoxD3 led to G2-M cell accumulation with up-regulation of DNA replication licensing factor MCM5 and MCM4 as well as cell cycle regulator polo-like kinase-1 (PLK1) and CDC6. Over-expression of those genesin lung cancer was associated with poor clinical outcomes of lung cancer patients. We also identified high mobility group box-1(HMGB1), Hras and Ephrin B1 gene expression increase after FoxD3 silencing which may participate in enhanced lung cancer cell invasion. Our study identifiedtumor suppressor function of FoxD3 in lung cancer andwe did the first comprehensive analysis of the genes regulated by FoxD3 for cell proliferation and invasion in lung cancer. The identified genes regulated by FoxD3 through our analysis will provide valuable information to uncover the mechanism of FoxD3 tumor suppressor function. Three control and three FOXD3 knockdown A549 cell lines were subjected to RNA sequencing.
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