Mus musculus
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA252109 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR1373365.fastq.gz | Fastqsanger.gz | |||
| SRR1373366.fastq.gz | Fastqsanger.gz | |||
| SRR1373367.fastq.gz | Fastqsanger.gz | |||
| SRR1373368.fastq.gz | Fastqsanger.gz |
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Project description:RNAseq characterization of gene expression changes 72 hours after genomic excision of Cebpa in murine hematopoietic progenitors from Cebpaf/f;CreER mice transformed by Hoxa9/Meis1. In the presence of tamoxifen (4OHT), Cre-ER localizes to the nucleus of cells allowing for excision of Cebpa and loss of C/EBPα protein levels. Loss of C/EBPα leads to a decrease in cellular proliferation. Examination of gene expression by RNAseq in two conditions in biological replicates.
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Project description:Gene expression changes after loss of Hoxa9 in transformed HSCs [HOXA9 RNA-seq]
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Project description:RNAseq characterization of gene expression changes 72 hours after genomic excision of Cebpa in murine hematopoietic progenitors from Cebpaf/f;CreER mice transformed by Hoxa9/Meis1. In the presence of tamoxifen (4OHT), Cre-ER localizes to the nucleus of cells allowing for excision of Cebpa and loss of C/EBPα protein levels. Loss of C/EBPα leads to a decrease in cellular proliferation.
2014-06-11 | GSE58360 | GEO
Project description:In this study, we use a conditional mouse model for Cebpa to investigate the significance of C/EBPα in HSCs. The frequency of HSCs is unaltered following deletion of C/EBPα, however, upon serial transplantations of either full BM or purified HSCs, the stem cells and stem cell activity is lost. This is not due to increased proliferation, but rather caused by a shift from quiescence to apoptosis with a resultant exhaustion of the stem cell pool. We identify direct C/EBPα target genes by combining genome-wide C/EBPα ChIP-seq analysis in stem and progenitor cells with gene expression data from HSC with and without C/EBPα. Furthermore, we explore the impact of C/EBPα on active and repressive histone modifications by doing functional genome-wide ChIP-seq analysis of H3K4Me3 and H3K27Me3 in stem and progenitor cells with and without C/EBPα. We have sorted HSCs from 3 Cebpaflox/flox and 4 Cebpaflox/flox;Mx1Cre mice 18 days after pIC injection.
2013-12-10 | E-GEOD-42498 | biostudies-arrayexpress
Project description:Genome-wide co-occupancy of Hoxa9 and C/EBPα in Hoxa9/Meis1 transformed HSCs [ChIP-seq]
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Project description:In this study, we use a conditional mouse model for Cebpa to investigate the significance of C/EBPα in HSCs. The frequency of HSCs is unaltered following deletion of C/EBPα, however, upon serial transplantations of either full BM or purified HSCs, the stem cells and stem cell activity is lost. This is not due to increased proliferation, but rather caused by a shift from quiescence to apoptosis with a resultant exhaustion of the stem cell pool. We identify direct C/EBPα target genes by combining genome-wide C/EBPα ChIP-seq analysis in stem and progenitor cells with gene expression data from HSC with and without C/EBPα. Furthermore, we explore the impact of C/EBPα on active and repressive histone modifications by doing functional genome-wide ChIP-seq analysis of H3K4Me3 and H3K27Me3 in stem and progenitor cells with and without C/EBPα.
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Project description:Introgressed variants from other species can be an important source of genetic variation because they may arise rapidly, can include multiple mutations on a single haplotype, and have often been pretested by selection in the species of origin. Although introgressed alleles are generally deleterious, several studies have reported introgression as the source of adaptive alleles-including the rodenticide-resistant variant of Vkorc1 that introgressed from Mus spretus into European populations of Mus musculus domesticus. Here, we conducted bidirectional genome scans to characterize introgressed regions into one wild population of M. spretus from Spain and three wild populations of M. m. domesticus from France, Germany, and Iran. Despite the fact that these species show considerable intrinsic postzygotic reproductive isolation, introgression was observed in all individuals, including in the M. musculus reference genome (GRCm38). Mus spretus individuals had a greater proportion of introgression compared with M. m. domesticus, and within M. m. domesticus, the proportion of introgression decreased with geographic distance from the area of sympatry. Introgression was observed on all autosomes for both species, but not on the X-chromosome in M. m. domesticus, consistent with known X-linked hybrid sterility and inviability genes that have been mapped to the M. spretus X-chromosome. Tract lengths were generally short with a few outliers of up to 2.7 Mb. Interestingly, the longest introgressed tracts were in olfactory receptor regions, and introgressed tracts were significantly enriched for olfactory receptor genes in both species, suggesting that introgression may be a source of functional novelty even between species with high barriers to gene flow.
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Project description:Mutations altering the normal function of C/EBPα are frequent in acute myeloid leukaemia with normal karyotype. MYB, a cooperating partner of C/EBPα, is likewise heavily implicated in AML. Here we investigate how the relative requirement for the transcription factor MYB in AML relates to the particular combinations of wild type and mutated alleles of CEBPA. Through knockdown of Myb in murine cell lines modelling the spectrum of CEBPA mutations we show that the consequences of reduced Myb depend on the mutational status of Cebpa. Importantly, Myb knockdown fails to override the block in myeloid differentiation in cells with biallelic N-terminal C/EBPα mutations, demonstrating for the first time that the dependency on Myb observed in AML is much lower in leukaemia with this combination of mutations. By comparing genome-wide analyses of gene expression following Myb knockdown and ChIP-seq data for the binding of C/EBPα isoforms, we provide evidence for a functional cooperation between C/EBPα and Myb in the maintenance of the leukaemia state. This co-dependency breaks down when both alleles of CEBPA harbour N-terminal mutations, as a subset of C/EBPα-regulated genes only bind the short p30 C/EBPα isoform and, unlike other C/EBPα regulated genes, do so without a requirement for Myb.
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