Transcriptome of wild type and Shh limb buds at E10.5
Ontology highlight
ABSTRACT:
ORGANISM(S): Mus musculus
SUBMITTER: Aimee Zuniga
PROVIDER: E-MEXP-3142 | biostudies-arrayexpress |
REPOSITORIES: biostudies-arrayexpress
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Project description:The transcriptome of the anterior handplates of mouse limb buds of Gli3 constitutive and Hoxa13-Cre Gli3 conditional mutant embryos was compared to the transcriptome of limb buds of wild type and Gli3 heterozygote embryos at embryonic day E11.75. All samples carried one copy of the Hoxa13-Cre allele.
2012-03-01 | E-MEXP-3495 | biostudies-arrayexpress
Project description:Purpose: The response to Hedgehog signaling in the limb is driven by GLI bound enhancers. While most Hh targets in the developing limb bud appear to be regulated by the activity of GLI-repressor, the role of GLI activator in this regulation is unclear. Here we assess the roles of GLI activator and repressor in regulating H3K27ac to activate their enhancers. Methods: ChIP-seq was performed in Embryonic day 10.5 mouse limb buds from WT, Shh-/- and Shh-/-Gli3-/- embryos Results: We found that most GLI binding regions can be activated in the absence of both GLI activator and repressor, while a small subset require GLI activator for activity. These indicate that most GLI enhancers in the limb are regulated by GLI repression.
2020-01-21 | GSE133712 | GEO
Project description:H3K27ac in WT and Shh-/-, and Shh-/- Gli3-/- E10.5 limb buds
| PRJNA552304 | ENA
Project description:Limb buds were dissected from E10.75 mouse embryos and stored in RNAlater reagent (Qiagen), for genotyping. For each replicate, RNA was isolated from pools of six limb buds either of wild type or homozygous mutants, using RNeasy micro-kit (Qiagen). cRNA was synthesized according to the manufacturers instructions (Ambion) and hybridized to the GeneChip Mouse Genome 430 2.0 Arrays (Affymetrix), which interrogates ca 39,000 transcripts. Three independent RNA extractions, cDNA synthesis and array hybridizations were performed. The expression arrays data were normalized and scaled to signal intensity of 100 using GCOS 1.2 software (Affymetrix). Expression levels were analyzed using GeneSpring software (Silicon Genetics, Redwood City, CA) and Matlab 2009 (Math Works, Inc., MA). To identify differentially expressed transcripts, pair-wise comparison analysis was performed with GCOS 1.2 software (Affymetrix). A 77% cutoff in consistency of change (at least seven out of nine comparisons were either increased or decreased) was applied. Only genes that satisfied the pair-wise comparison test and displayed ?1.5 fold change in expression were considered for further analysis.
2011-11-01 | E-MEXP-2977 | biostudies-arrayexpress
Project description:We used microarrays to identify Pax3 targets during myogenesis in the mouse embryo Mouse embryos were genotyped Pax3GFP/+ or Pax3PAX3-FKHR/GFP and dissected at E10.5 under a fluorescent binocular. The forelimb buds were dissected and dissociated and GFP positive cells were then sorted by flow cytometry before RNA extraction and hybridization on Affymetrix microarrays. We also sorted GFP negative cells.
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Project description:Multiple genes are dysregulated in hindlimb buds of Nipbl-deficient embryos. In all, more than 1000 limb bud genes were found to be significantly altered in expression by microarray analysis of E10.5 mouse hindlimb buds. Small changes in expression (mostly decreases) were observed for genes involved in FGF, BMP, and SHH pathways, as well as numerous genes involved in the Wnt/planar cell polarity signaling pathway. Genes involved in the Mediator complex, Cohesin function, and Hox gene expression and functions were also dysregulated in Nipbl deficient limb buds.
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Project description:Limb buds were dissected from E10.75 mouse embryos and stored in RNAlater reagent (Qiagen), for genotyping. For each replicate, RNA was isolated from pools of 6 limb buds either of wild type or homozygous mutants using RNeasy micro-kit (Qiagen). rRNA was depleted using RiboMinusTM Human/Mouse Transcriptome Isolation Kit (Invitrogen). After cRNA amplification, single or double-stranded cDNA was generated using The GeneChip Whole Transcript Amplified Double-Stranded Target Assay kit (Affymetrix) according to manufacturers instructions. cDNA was fragmented and labeled using GeneChip WT Double-Stranded DNA Terminal Labeling Kit (Affymetrix) and hybridized to oligonucleotide tiling arrays. The control genomic DNA samples were fragmented with DNAse I. RNA-chip data were computed at the exon level, by averaging the normalized intensities of all probes falling within the exon. As a complement, array data were quantile normalized within cDNA/genomic DNA replicate groups and scaled to medial feature intensity of 10 using TAS software (Affymetrix). For each genomic position, a dataset was generated consisting of all probes mapping within a sliding window of 80 bp. The averaged ratios were plotted along the genomic DNA sequence using Integrated Genome Browser (IGB) software (Affymetrix).
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Project description:Multiple genes are dysregulated in hindlimb buds of Nipbl-deficient embryos. In all, more than 1000 limb bud genes were found to be significantly altered in expression by microarray analysis of E10.5 mouse hindlimb buds. Small changes in expression (mostly decreases) were observed for genes involved in FGF, BMP, and SHH pathways, as well as numerous genes involved in the Wnt/planar cell polarity signaling pathway. Genes involved in the Mediator complex, Cohesin function, and Hox gene expression and functions were also dysregulated in Nipbl deficient limb buds. Microarray analysis using RNA extracted from E10.5 hindlimb limb buds harvested from stage-matched Nipbl+/- (n=12) and wildtype (n=12)
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Project description:Dormant and actively growing, green, swollen but less than 1cm elongated buds were compared.
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Project description:The basic helix-loop-helix transcription factor Twist1 has a well-documented role in mesenchymal populations of the developing embryo, such as endocardial cushion (ECC) mesenchymal cells and limb buds, and during cancer development and progression. Whether Twist1 regulates the same transcriptional targets in different cell types has yet to be investigated. Through chromatin immunoprecipitation followed by sequencing (Chip-seq) analysis, the cell type-specific genome-wide occupancy of Twist1 was investigated in ECCs, limb buds and mouse peripheral nerve sheath tumor (PNST) cells. Twist1 binds mainly in a cell type-specific manner, with very few common genomic regions occupied by Twist1 in different cell types. Genes associated with binding peaks in each cell type are related to known Twist1 cellular functions in ECCs, limb buds, and cancer cells. We found that cell type-specific binding of Twist1 may be influenced by histone modifications or co-factors. Binding regions were located in several Wnt pathway associated genes, supporting a link between Twist1 and Wnt signalling in ECCs, limb buds, and PNST cells. These data suggest that similar functions are regulated by Twist1 in ECCs, limb buds, and PNST cells in a cell type-specific manner, and provide insights into possible mechanisms utilized for cell type-specificity of Twist1 binding.
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