Browse
Submit Data
Databases
API
Help

Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Small RNAs in differentiating mouse ES cells

ABSTRACT: RNA-interference (RNAi) refers to a growing class of gene silencing phenomena defined by a requirement for small RNAs of 20-32 nt and the action of the Argonaute (Ago) family of ribonucleases. We have previously identified developmentally regulated small RNAs, using Northern blot analysis, that are expressed during X-chromosome inactivation in differentiating female mouse ES cels. We sought to identify these small RNAs using deep sequencing. We identified small RNAs that align to retrotransposon sequences and are enriched on the X-chromosome. LINE elements have been proposed to act as way stations during X-inactivation for the spreading of silencing along the entire chromosome, and our findings suggest that LINE elements found on the X-chromosome may be enriched for small RNAs relative to the genome. These results suggest that RNAi pathways are involved in regulating LINE elements during X-inactivation and ES cell differentiation. We size-fractionated total RNA from differentiating female mouse ES cells (day 4) into 18-24 nt and 25-45 nt populations and sequenced each fraction separately using the 454 platform. We used a karyotypically stable 40XX female ES cell line (EL16.7) with one X each of 129 and M. castaneus origins: 129 x (M.castaneus x 129).

ORGANISM(S): Mus musculus

SUBMITTER: Mark Borowsky

PROVIDER: E-GEOD-21888 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

ACCESS DATA

Json Xml

Similar Datasets

Small RNAs in differentiating mouse ES cells

Project description:RNA-interference (RNAi) refers to a growing class of gene silencing phenomena defined by a requirement for small RNAs of 20-32 nt and the action of the Argonaute (Ago) family of ribonucleases. We have previously identified developmentally regulated small RNAs, using Northern blot analysis, that are expressed during X-chromosome inactivation in differentiating female mouse ES cels. We sought to identify these small RNAs using deep sequencing. We identified small RNAs that align to retrotransposon sequences and are enriched on the X-chromosome. LINE elements have been proposed to act as way stations during X-inactivation for the spreading of silencing along the entire chromosome, and our findings suggest that LINE elements found on the X-chromosome may be enriched for small RNAs relative to the genome. These results suggest that RNAi pathways are involved in regulating LINE elements during X-inactivation and ES cell differentiation.

2013-05-18 | GSE21888 | GEO

Small RNAs in undifferentiated and differentiating mouse embryonic stem cells

Project description:We report the identification of small RNAs in undifferentiated (d0) and differentiating (d4) mouse embryonic stem (ES) cells using high-throughput sequencing. The goal of this study was to identify small RNAs involved in X-chromosome inactivation (XCI). We have identified a subset of small RNAs that are generated from transposon sequences and map to the X-chromosome, suggesting their involvement in transposon control on the inactivating X-chromosome.

2018-03-22 | GSE39884 | GEO

The efficiency of Xist-mediated silencing of X-linked and autosomal genes is determined by the genomic environment

Project description:Xist is indispensable for X chromosome inactivation (XCI) in female mammalian cells. However, how Xist RNA directs chromosome-wide transcriptional inactivation of the X chromosome is largely unknown. Here, to study chromosome inactivation by Xist, we generated a system where ectopic Xist expression can be induced from several genomic contexts in aneuploid mouse ES cells. We found that ectopic Xist expression from any location on the X chromosome faithfully recapitulated endogenous XCI, showing the potency of Xist to initiate XCI. Genes that escape XCI remain consistently transcriptionally active upon ectopic XCI, regardless of their position relative to Xist transgenes, and the enrichment of CTCF at their promoters is implicated in directing XCI escape. Xist expression from autosomes facilitates their transcriptional silencing to different degrees, and gene density in proximity of the Xist transcription locus plays a central role in determining the efficiency of gene inactivation. We also show that the enrichment of LINE elements together with a specific chromatin environment facilitates Xist-mediated silencing of both X-linked and autosomal genes. These findings provide new insights into the epigenetic mechanisms that mediate XCI and identify genomic features that promote Xist-mediated chromosome-wide gene inactivation

2017-07-04 | GSE92894 | GEO

Gene regulation in ES cell lines with different nuclei donor cell sources

Project description:Comparison of ES cell line of different genetic background and different cloning methods to identify changes on gene expression levels between these ES cell lines. The main question behind the experiments id, if there is major/important difference on gene expression level between NT embryo-derived ES cell liens and control embryo derived ES cell lines. Ih has an effect on therapeutic cloning that means the nuclei donor cell source could be an important question. We also included different genetic background cell lines (HM-1 is 129/SV, #4 ES cell line is B6D2F1 derived heterozygote cell line) to compare the effect of gentic background differences. Hetero- and homozygosis con be compared based on the PGA ES cell line from the same genetic backgound. Keywords: cDNA microarray, murine ES cells, nucleous transfer

2008-05-30 | GSE8424 | GEO

High resolution analysis of epigenetic changes associated with X inactivation, ChIP-chip

Project description:This study describes the epigenetic profiling of the X chromosome during X inactivation. It includes H3K4me3 and H3K27me3 ChIP-Seq profiles of male (E14) and female (LF2 and XT67E1) mouse ES cells, together with their differentiated derivatives (either 4d atRA or 10d EB). It also includes ChIP-chip profiles around the Xic on chromosome X of H3K4me3, H3K27me3, H3K9me2, H3K36me3, Pol II, TBP, H3-Core as well as expression, using male (E14) and female (LF2) mouse ES cells, together with their differentiated derivatives (either 4d atRA or 10d EB).

2009-06-06 | GSE15883 | GEO

High resolution analysis of epigenetic changes associated with X inactivation, ChIP-Seq

2009-06-06 | GSE15814 | GEO

DNA-seq in male ES cells cultured by either standard ES cell culture or our improved culture conditions [Male DNA-seq]

Project description:Major complications with in vitro culture of female embryonic stem cells (ESC) have impeded study of sex-specific pluripotency; however, from the published work female pluripotency significantly differs to male. We report a replenishable female ESC system that has enabled us to optimise a protocol for preserving the XX karyotype. Our protocol also improves male ESC fitness. To demonstrate the utility of the system, we screened for regulators of the female-specific process of X chromosome inactivation, revealing a new role for chromatin remodellers Smarcc1 and Smarca4 in establishment of X inactivation. The remodellers create a nucleosome depleted region at gene promotors on the inactive X during exit from pluripotency, without which gene silencing fails. Our female ESC system provides a tractable model for XX ESC culture that will expedite study of female pluripotency and has enabled us to discover new features of the female-specific process of X inactivation. This experiment is designed to test the effect of our improved ES culture conditions on the male ES cell karyotype.

2022-10-31 | GSE137158 | GEO

RNA-seq in male ES cells cultured by either standard ES cell culture or our improved culture conditions [Male RNA-seq]

2022-10-31 | GSE137157 | GEO

RNA-seq in differentiating Xmas cells ES cells [Xmas Differentiation RNA-seq]

Project description:Major complications with in vitro culture of female embryonic stem cells (ESC) have impeded study of sex-specific pluripotency; however, from the published work female pluripotency significantly differs to male. We report a replenishable female ESC system that has enabled us to optimise a protocol for preserving the XX karyotype. Our protocol also improves male ESC fitness. To demonstrate the utility of the system, we screened for regulators of the female-specific process of X chromosome inactivation, revealing a new role for chromatin remodellers Smarcc1 and Smarca4 in establishment of X inactivation. The remodellers create a nucleosome depleted region at gene promotors on the inactive X during exit from pluripotency, without which gene silencing fails. Our female ESC system provides a tractable model for XX ESC culture that will expedite study of female pluripotency and has enabled us to discover new features of the female-specific process of X inactivation. This experiment is designed to test if Xmas ES cells are transcriptionally similar to published ES cell lines during differentiation.

2022-02-02 | GSE137156 | GEO

129-derived passenger mutations confound phenotype of ACKR1-deficient mice

Project description:A majority of genetically modified mice carry passenger mutations, originating from the 129-derived embryonic stem (ES) cells, near the targeted gene. Unintended retention of these mutations can introduce confounding phenotypes and affect conclusions. We show that Ackr1-/-129ES mice retained approximately 6 Mb of 129 ES cells-derived genomic material in chromosome 1 near Ackr1 in bone marrow derived monocytes (Mono), nucleated erythroblasts (NECs), and polymorphonucleated neutrophils (PMN), notably affecting the expression of PYHIN genes.

2024-09-15 | GSE256021 | GEO

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data