Mus musculus
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA136305 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR094793.fastq.gz | Fastqsanger.gz | |||
| SRR094794.fastq.gz | Fastqsanger.gz | |||
| SRR094795.fastq.gz | Fastqsanger.gz | |||
| SRR094796.fastq.gz | Fastqsanger.gz | |||
| SRR094797.fastq.gz | Fastqsanger.gz |
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Project description:The methylation status of colon epithelial cells was profiled in wild type mice and mice expressing a Dnmt3b transgene. Genome-scale methylation profiles were generated using reduced representation bisulfite sequencing (RRBS), with CpG methylation scored by promoter and also summarized by gene. Dnmt3b expression is associated with a strong increase in de novo methylation of a discrete subset of "methylation sensitive" genes which show a strong concordance with genes methylated in human colon cancer. These results, together with further analysis, indicate that colon epithelial cell methylation in the Dnmt3b mouse model predicts DNA methylation of human colon cancer with high confidence. Three each of Dnmt3b-induced and control mice, each split into two fractions.
2011-10-25 | E-GEOD-26758 | biostudies-arrayexpress
Project description:The methylation status of colon epithelial cells was profiled in wild type mice and mice expressing a Dnmt3b transgene. Genome-scale methylation profiles were generated using reduced representation bisulfite sequencing (RRBS), with CpG methylation scored by promoter and also summarized by gene. Dnmt3b expression is associated with a strong increase in de novo methylation of a discrete subset of "methylation sensitive" genes which show a strong concordance with genes methylated in human colon cancer. These results, together with further analysis, indicate that colon epithelial cell methylation in the Dnmt3b mouse model predicts DNA methylation of human colon cancer with high confidence.
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Project description:Increased DNA Methylation of Dnmt3b-Targets Impairs Leukemogenesis (RRBS)
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Project description:The de novo DNA methyltransferases Dnmt3a and Dnmt3b are of crucial importance in hematopoietic stem cells, and Dnmt3b has recently been shown to play a role in genic methylation. Forced Dnmt3b expression induced widespread DNA hypermethylation in myc-bcl2 induced leukemias, especially at promoters and gene bodies of stem cell-related genes. MLL-AF9 induced leukemogenesis showed much less pronounced DNA hypermethylation upon Dnmt3b expression. Nonetheless, leukemogenesis was delayed in both models with a shared core set of DNA hypermethylated regions and suppression of stem cell-related genes. Our findings indicate a critical role for Dnmt3b-mediated DNA methylation in leukemia development and maintenance of LSC function. To investigate how Dnmt3b-mediated DNA methylation affects leukemogenesis, we analyzed leukemia development under conditions of high and physiological methylation levels in a tetracycline-inducible knockin mouse model. High expression of Dnmt3b slowed leukemia development in serial transplantations and impaired leukemia stem cell (LSC) function.
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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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