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

Identification of differentially methylated regions between placentas and maternal blood cells on chromosome 18

ABSTRACT: Comparison of DNA methylation levels of chromosome 18 between placentas and blood cells of pregnant women Extracted DNA from 5 cases of placental tissues and 5 cases of maternal blood cell was subjected to MeDIP (methylated DNA immunoprecipitation) and hybridized to Affymetrix GeneChip® Human Tiling 2.0R Array sets. A control without immunoprecipitation (IP) was also processed in parallel with the immunoprecipitated DNA samples. The results were validated with bisulfite sequencing and mass spectrometry-based analysis

ORGANISM(S): Homo sapiens

SUBMITTER: Yuk Ming Lo

PROVIDER: E-GEOD-22837 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

ACCESS DATA

Json Xml

Publications

Systematic identification of placental epigenetic signatures for the noninvasive prenatal detection of Edwards syndrome.

Tsui Dana W Y DW Lam Y M Doris YM Lee Wing S WS Leung Tak Y TY Lau Tze K TK Lau Elizabeth T ET Tang Mary H Y MH Akolekar Ranjit R Nicolaides Kypros H KH Chiu Rossa W K RW Lo Y M Dennis YM Chim Stephen S C SS

PloS one 20101130 11

<h4>Background</h4>Noninvasive prenatal diagnosis of fetal aneuploidy by maternal plasma analysis is challenging owing to the low fractional and absolute concentrations of fetal DNA in maternal plasma. Previously, we demonstrated for the first time that fetal DNA in maternal plasma could be specifically targeted by epigenetic (DNA methylation) signatures in the placenta. By comparing one such methylated fetal epigenetic marker located on chromosome 21 with another fetal genetic marker located on ...[more]

PMID: 21152411

Similar Datasets

Genome-wide binding of Ubx and Hth in 3rd thoracic imaginal discs

Project description:The Hox genes are responsible for generating morphological diversity along the anterior-posterior axis during animal development. The Drosophila Hox gene Ultrabithorax (Ubx), for example, is required for specifying the identity of the third thoracic (T3) segment of the adult, which includes the dorsal haltere, an appendage required for flight, and the ventral T3 leg. Ubx mutants show homeotic transformations of the T3 leg towards the identity of the T2 leg and the haltere towards the wing. All Hox genes, including Ubx, encode homeodomain containing transcription factors, raising the question of what target genes Ubx regulates to generate these adult structures. To address this question, we carried out whole genome ChIP-chip studies to identify all of the Ubx bound regions in the haltere and T3 leg imaginal discs, which are the precursors to these adult structures. In addition, we used ChIP-chip to identify the sites bound by the Hox cofactor, Homothorax (Hth). This is a dataset generated by the Drosophila Regulatory Elements modENCODE Project led by Kevin P. White at the University of Chicago. This dataset was generated in collaboration with Richard S. Mann at Columbia University. It contains ChIP-chip data on Affymetrix Drosophila Tiling 2.0R arrays for multiple transcription factor antibodies in multiple Drosophila tissues. For data usage terms and conditions, please refer to http://www.genome.gov/27528022 and http://www.genome.gov/Pages/Research/ENCODE/ENCODEDataReleasePolicyFinal2008.pdf Haltere or leg imaginal discs ChIPped for Ubx or Hth vs. input DNA from corresponding imaginal discs. For each combination of tissue and antibody, ChIP experiments have been performed and hybridized on Affymetrix Drosophila Tiling 2.0R arrays. At least 3 biological replicates for the ChIP sample have been hybridized.

2011-01-21 | E-GEOD-26793 | biostudies-arrayexpress

modENCODE_White Lab: genome-wide ChIP-chip and ChIP-Seq data

Project description:For data usage terms and conditions, please refer to http://www.genome.gov/27528022 and http://www.genome.gov/Pages/Research/ENCODE/ENCODEDataReleasePolicyFinal2008.pdf This SuperSeries is composed of the SubSeries listed below. Refer to individual Series

2010-08-11 | E-GEOD-23537 | biostudies-arrayexpress

MEDIATOR subunit med8 binding in Saccharomyces cerevisiae

Project description:The Mediator complex transmits activation signals from DNA bound transcription factors to the core transcription machinery. Genome wide localization studies have demonstrated that Mediator occupancy not only correlates with high levels of transcription, but that the complex also is present at transcriptionally silenced locations. We provide evidence that Mediator localization is guided by an interaction with histone tails, and that this interaction is regulated by their post-translational modifications. A quantitative, high-density genetic interaction map revealed links between Mediator components and factors affecting chromatin structure, especially histone deacetylases. Peptide binding assays demonstrated that pure wild type Mediator forms stable complexes with the tails of Histone H3 and H4. These binding assays also showed Mediator – histone H4 peptide interactions are specifically inhibited by acetylation of the histone H4 lysine 16, a residue critical in transcriptional silencing. Finally, these findings were validated by tiling array analysis, that revealed a broad correlation between Mediator and nucleosome occupancy in vivo, but a negative correlation between Mediator and nucleosomes acetylated at histone H4 lysine 16. Our studies show that chromatin structure and the acetylation state of histones are intimately connected to Mediator localization. Med8-TAP strain ChIPed with IgG beads vs. Input in Saccharomyces cerevisiae

2011-11-22 | E-GEOD-28613 | biostudies-arrayexpress

Genome-Wide Yan Chromatin Occupancy in Drosophila Embryos

Project description:The ETS transcriptional repressor Yan functions as part of a developmental switch that in response to receptor tyrosine kinase signaling, transitions from a high-Yan to a low-Yan state to direct specification of a variety of cell fates. To date very few direct target genes have been identified, nor is it clear how their expression is buffered against developmental noise to prevent inappropriate oscillations between states. Following investigation of its genome-wide chromatin occupancy profile, we noticed a striking signature at developmentally important genes whereby Yan associates with chromatin in regions of high-peak density that span multiple kilobases which partially relies upon SAM-domain mediated self-association. We speculate that the high-density Yan occupancy signature may reveal a novel mechanism that buffers the expression of critical developmental regulators against intrinsic and environmental noise. The supplementary bed file contains Yan binding regions. Yan ChIP from staged Drosophila embryos

2013-03-01 | E-GEOD-34038 | biostudies-arrayexpress

Expression analysis of HFF cells in G0 phase [MAT]

Project description:Whole transcriptome expression analysis of HFF cells on Affymetrix Human Tiling 1.0 array set. Cells were synchronised by serum starvation and transcriptome-wide expression in G0 phase. Expression data were processed with MAT (Johnson et al., "Model-based analysis of tiling-arrays for ChIP-chip." Proc Natl Acad Sci USA, 103:12457-62, 2006.). We analyzed one Affymetrix Human Tiling 1.0R set

2012-12-18 | E-GEOD-36154 | biostudies-arrayexpress

Expression analysis of HFF cells in G1 phase [MAT]

Project description:Whole transcriptome expression analysis of HFF cells on Affymetrix Human Tiling 1.0 array set. Cells were synchronised by serum starvation and transcriptome-wide expression in G1 phase. Expression data were processed with MAT (Johnson et al., "Model-based analysis of tiling-arrays for ChIP-chip." Proc Natl Acad Sci USA, 103:12457-62, 2006.). We analyzed one Affymetrix Human Tiling 1.0R set

2012-12-18 | E-GEOD-36155 | biostudies-arrayexpress

FOXP3 binding sites in promoter regions of human Jurkat T cells

Project description:The transcription factor (TF) Forkhead Box P3 (FOXP3) is constitutively expressed in high levels in natural occurring CD4+CD25+ regulatory T cells (nTreg) and is not only the most accepted marker for that cell population, but is considered lineage determinative. Chromatin immunoprecipitation (ChIP) of transcription factors in combination with genomic tiling microarray analysis (ChIP-on-Chip) has been shown to be an appropriate tool to identify FOXP3 transcription factor binding sites (TFBS) on a genome-wide scale. In combination with microarray expression analysis the ChIP-on-Chip technique allows to identify direct FOXP3 target genes. ChIP-on-Chip analysis of human FOXP3M-NM-^T2 isoform expressed in resting and PMA / ionomycin stimulated Jurkat T cells revealed several thousand putative FOXP3 binding sites and importance of intronic regions for FOXP3 binding. Knowledge of general distribution patterns of FOXP3 TFBS in the human genome under resting and activated conditions contributes to a better understanding of this TF and its influence on direct target genes with importance for Treg cell phenotype and function. ChIP-DNA from FOXP3(M-NM-^T2) expressing Jurkat T cells under resting and PMA / ionomycin stimulated conditions from duplicate experiments was analyzed. FOXP3-specific tiling array data were analyzed in reference to an individual isotype control dataset (J-FOXP3 ChIP'd with FOXP3 antibody vs. J-FOXP3 ChIP'd with isotype control antibody). In total 8 tiling array analyses were performed (2x resting J-FOXP3 with FOXP3-IP, 2x resting J-FOXP3 with isotype-IP, 2x PMA/iono J-FOXP3 with FOXP3-IP, 2x PMA/iono J-FOXP3 with isotype-IP)

2012-11-26 | E-GEOD-37252 | biostudies-arrayexpress

Differential expression analysis of HFF cells in G0 phase compared to cells in G1 using MAT

Project description:This SuperSeries is composed of the following subset Series: GSE36154: Expression analysis of HFF cells in G0 phase [MAT] GSE36155: Expression analysis of HFF cells in G1 phase [MAT] GSE36156: Differential expression analysis of HFF cells in G0 phase compared to cells in G1 [MAT] Refer to individual Series

2012-06-05 | E-GEOD-36187 | biostudies-arrayexpress

Genome-wide binding of Sd and Yki in imaginal discs

Project description:The transcription cofactor Yki drives growth and proliferation in part by controlling mitochondrial network formation. To determine if Yki and Sd are directly bound to DNA corresponding to mitochondrial genes, we used chromatin immunoprecipitation and whole genome tiling arrays (ChIP-chip) to identify regions bound by these factors in eye-antenna and wing imaginal discs. The supplementary .bed files contain all Yki or Sd binding sites (called at 5% FDR) in wing or eye-antenna imaginal discs, as well as shared Sd+Yki sites and associated target genes. Wing or eye-antenna imaginal discs ChIPped for Yki or Sd-GFP vs. input DNA from corresponding imaginal discs.

2012-10-03 | E-GEOD-26678 | biostudies-arrayexpress

F1 Interspecies Hybrid Analysis Reveals Parent-Of-Origin Bias in the Mouse Placenta

Project description:To investigate the epigenetic landscape at the interface between mother and fetus, we provide a comprehensive analysis of parent of origin bias in the placenta. Using F1 interspecies hybrids, we sequenced RNA from 23 individual midgestation placentas, five late stage placentas, and two yolk sac samples and then used SNPs to determine whether transcripts were preferentially generated from the maternal or paternal allele. In the placenta, we find 103 genes that show significant and reproducible parent-of-origin bias, of which 78 are novel candidates. Most (96%) show a strong maternal bias which, using multiple models, we demonstrate is not due to maternal decidual contamination. Analysis of the X chromosome also reveals paternal expression of Xist and several genes that escape inactivation, most significantly Rps4x, Fhl1, and Slc38a5. Finally, sequencing individual placentas allowed us to reveal notable expression similarity between littermates. In all, we observe a striking preference for maternal transcription in the midgestation mouse placenta and a dynamic imprinting landscape in extraembryonic tissues, reflecting the complex nature of epigenetic pathways in the placenta. 3'-end Sequencing for Expression Quantification (3SEQ) and SNP Analysis to observe parent-of-origin bias in 28 placental samples at two time points and 2 yolk sac samples

2014-02-28 | E-GEOD-42671 | biostudies-arrayexpress

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