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Transcriptional function of E2A, Ebf1, Pax5, Ikaros and Aiolos analyzed by in vivo acute protein degradation in early B cell development [RNA-seq]

ABSTRACT: Transcriptional function of E2A, Ebf1, Pax5, Ikaros and Aiolos analyzed by in vivo acute protein degradation in early B cell development [RNA-seq]

PROVIDER: PRJNA1081941 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR28157400_1.fastq.gz	Fastqsanger.gz
	SRR28157400_2.fastq.gz	Fastqsanger.gz
	SRR28157401_1.fastq.gz	Fastqsanger.gz
	SRR28157401_2.fastq.gz	Fastqsanger.gz
	SRR28157402_1.fastq.gz	Fastqsanger.gz

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Transcriptional function of E2A, Ebf1, Pax5, Ikaros and Aiolos analyzed by in vivo acute protein degradation in early B cell development [CUT&RUN]

Project description:Early B-lymphopoiesis depends on E2A, Ebf1, Pax5 and Ikaros family members. Here, we used acute protein degradation in vivo to identify direct target genes of these transcription factors in pro-B, small pre-B and immature B-cells. E2A, Ebf1 and Pax5 predominantly function as transcriptional activators by inducing open chromatin at their target genes, have largely unique functions and maintain cell viability in vivo by activating Bcl2l1. Ikaros and Aiolos cooperatively control early B-cell development and act as dedicated repressors to suppress open chromatin at their target genes. The surrogate light-chain genes Igll1 and Vpreb1 are directly activated by Ebf1 and Pax5 in pro-B cells and directly repressed by Ikaros and Aiolos in small pre-B cells. Pax5 and E2A contribute to V(D)J recombination by activating Rag1, Rag2, Dntt, Irf4 and Irf8. Like Pax5, Ebf1 also represses the cohesin-release factor gene Wapl to mediate prolonged loop extrusion across the Igh locus. In summary, in vivo protein degradation has provided unprecedented insight into the control of early B-lymphopoiesis by five transcription factors.

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Transcriptional function of E2A, Ebf1, Pax5, Ikaros and Aiolos analyzed by in vivo acute protein degradation in early B cell development [ATAC-seq]

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Transcriptional function of E2A, Ebf1, Pax5, Ikaros and Aiolos analyzed by in vivo acute protein degradation in early B cell development [RNA-seq]

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Transcriptional function of E2A, Ebf1, Pax5, Ikaros and Aiolos analyzed by in vivo acute protein degradation in early B cell development

Project description:Transcriptional function of E2A, Ebf1, Pax5, Ikaros and Aiolos analyzed by in vivo acute protein degradation in early B cell development

| PRJNA1081937 | ENA

Transcriptional function of E2A, Ebf1, Pax5, Ikaros and Aiolos analyzed by in vivo acute protein degradation in early B cell development [ATAC-seq]

Project description:Transcriptional function of E2A, Ebf1, Pax5, Ikaros and Aiolos analyzed by in vivo acute protein degradation in early B cell development [ATAC-seq]

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Transcriptional function of E2A, Ebf1, Pax5, Ikaros and Aiolos analyzed by in vivo acute protein degradation in early B cell development [CUT&RUN]

Project description:Transcriptional function of E2A, Ebf1, Pax5, Ikaros and Aiolos analyzed by in vivo acute protein degradation in early B cell development [CUT&RUN]

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Expression data comparing EBF1 versus Pax5 induced genes

Project description:We used microarrays to establish whether EBF1 and Pax5 repress similar or unique genes. We found that EBF1 uniquely represses the expression of the T-lineage transcription factor Gata3. Ebf1-/- pre-pro-B cells were transduced with either control MigR1, MigY-EBF1 or MigR-Pax5 viruses. 24 hours later, RNA was isolated and processed for Affymetrix microarray analysis. Cells expressing EBF1, Pax5, or neither were sorted and processed. Scale represents log2 value of normalized signal level.

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Ebf1 or Pax5 Haploinsufficiency Synergizes with STAT5 Activation to Initiate Acute Lymphoblastic Leukemia

Project description:STAT5 is critical for differentiation, proliferation and survival of progenitor B cells suggesting a possible role in Acute Lymphoblastic Leukemia (ALL). Herein, we show increased expression of activated STAT5 in ALL patients, which correlates with treatment outcome. Mutations in Ebf1 and Pax5, genes critical for B cell development have also been identified in human ALL. To determine whether mutations in Ebf1 or Pax5 synergize with STAT5 activation to induce ALL we crossed mice expressing a constitutively active form of STAT5 (Stat5b-CA) with mice heterozygous for Ebf1 or Pax5. Haploinsufficiency of either Pax5 or Ebf1 synergized with Stat5b-CA to rapidly induce ALL in 100% of the mice. The leukemic cells displayed reduced expression of both Pax5 and Ebf1 but this had little affect on most EBF1 or PAX5 target genes. However, a subset of these genes was deregulated and included a large percentage of potential tumor suppressor genes and oncogenes. Further, most of these genes appear to be jointly regulated by both EBF1 and PAX5. Our findings suggest a model whereby small perturbations in a self-reinforcing network of transcription factors critical for B cell development, specifically PAX5 and EBF1, cooperate with STAT5 activation to initiate ALL. Gene expression profiling was performed on cells isolated from lymph nodes of Stat5b-CA x Ebf1+/- and Stat5b-CA x Rag2-/- leukemic mice and pre B cells sorted from bone marrow of C57BL/6 mice and Stat5b-CA transgenic mice. 17 Samples.

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Ebf1 or Pax5 Haploinsufficiency Synergizes with STAT5 Activation to Initiate Acute Lymphoblastic Leukemia

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