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Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Transcription profiling of mouse how germ-line clones embryos and WT embryos at 3-5 h AEL

ABSTRACT: Mutant embryos lacking maternal and zygotic HOW exhibit defects in mesoderm development. How is an RNA binding protein that regulates the levels of mRNAs by controling RNA metabolism. To gain an insight as to the profile of mRNAs regulated by HOW during early mesoderm development we analyzed the array of mRNAs whose levels are altered in the how mutant embryos. Experiment Overall Design: Embryos lacking both maternal and zygoic HOW were selected using a GFP balancer. The mRNA of 5 collections of 3-5 hrs old WT or how mutant embryos were pooled and used for each microarray experiment. Two microarray experiments were performed from independent samples.

ORGANISM(S): Drosophila melanogaster

SUBMITTER: Talila Volk

PROVIDER: E-GEOD-7772 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Post-transcriptional repression of the Drosophila midkine and pleiotrophin homolog miple by HOW is essential for correct mesoderm spreading.

Toledano-Katchalski Hila H Nir Ronit R Volohonsky Gloria G Volk Talila T

Development (Cambridge, England) 20070829 19

The even spreading of mesoderm cells in the Drosophila embryo is essential for its proper patterning by ectodermally derived signals. In how germline clone embryos, defects in mesoderm spreading lead to a partial loss of dorsal mesoderm derivatives. HOW is an RNA-binding protein that is thought to regulate diverse mRNA targets. To identify direct HOW targets, we implemented a series of selection methods on mRNAs whose levels were elevated in how germline clone embryos during the stage of mesoder ...[more]

PMID: 17728343

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Protein interactors of MEG-1 in C. elegans embryos

Project description:In animals with germ plasm, specification of the germline involves “germ granules”, cytoplasmic condensates that enrich maternal transcripts in the germline founder cells. In C. elegans embryos, P granules enrich maternal transcripts, but surprisingly P granules are not essential for germ cell fate specification. Here we have described a second condensate in the C. elegans germ plasm. Like canonical P-bodies found in somatic cells, “germline P-bodies” contain regulators of mRNA decapping and deadenylation and, in addition, the intrinsically-disordered proteins MEG-1 and MEG-2 and the TIS11-family RNA-binding protein POS-1. Embryos lacking meg-1 and meg-2 do not stabilize P-body components, miss-regulate POS-1 targets, miss-specify the germline founder cell, and do not develop a germline. Our findings suggest that specification of the germ line involves at least two distinct condensates that independently enrich and regulate maternal mRNAs in the germline founder cells.

2022-10-05 | PXD036610 | Pride

Transcription profiling of Drosophila mef2 allelic series reveals mef2 activity levels differentially affect gene expression during muscle development

Project description:The conserved Mef2 transcription factor is a major regulator of gene expression and differentiation. Recent genomic studies have identified a large number of mef2-regulated target genes with distinct temporal expression profiles during Drosophila myogenesis. However, the question remains as to how a single transcription factor can control such diverse patterns of gene expression. The aim of this project was to investigate whether there are genes with different mef2-requirements for their expression during muscle differentiation in vivo during the development of Drosophila melanogaster. Experiment Overall Design: We used microarrays in conjunction with a mef2 allelic series to determine the gene expression profile in developing embryos at five different levels of mef2 activity. The allelic series extends from a null mutation, mef222.21, through to the control, via three hypomorphic alleles, mef2113, mef2424, and mef265. The series corresponds to different levels of Mef2 in the following order: control > 65 > 424 > 113 > 22.21. The control stock for the microarray analysis was dp cn a px sp, the stock used for the mutagenesis that produced mef265, mef2424 and mef2113. For the microarrays, 30 minute collections of control and mutant embryos for each mef2 allele were individually staged and pools of 150 embryos were then processed at mid stage 13. This corresponds to the early differentiation phase of muscle development and the expression of multiple muscle sarcomeric protein genes. Quadruplicate samples were assayed using AffymetrixÂ® Genechips by the Flychip Drosophila microarray resource.

2008-06-17 | E-GEOD-9889 | biostudies-arrayexpress

Comparison between mRNAs of how germ-line clones embryos and WT embryos at 3-5 h AEL

Project description:Mutant embryos lacking maternal and zygotic HOW exhibit defects in mesoderm development. How is an RNA binding protein that regulates the levels of mRNAs by controling RNA metabolism. To gain an insight as to the profile of mRNAs regulated by HOW during early mesoderm development we analyzed the array of mRNAs whose levels are altered in the how mutant embryos. Keywords: Genetic modification

2007-09-24 | GSE7772 | GEO

Precise temporal regulation of post-transcriptional repressors is required for an orderly Drosophila maternal-to-zygotic transition

Project description:In animal embryos the maternal-to-zygotic transition (MZT) hands developmental control from maternal to zygotic gene products. We show that the maternal proteome represents over half of the protein coding capacity of the Drosophila melanogaster genome and that 2% of this proteome is rapidly degraded during the MZT. Cleared proteins include the post-transcriptional repressors Cup, Trailer hitch (TRAL), Maternal expression at 31B (ME31B), and Smaug (SMG). While the ubiquitin-proteasome system is necessary for clearance of all four repressors, distinct E3 ligase complexes target them: the C-terminal to Lis1 Homology (CTLH) complex targets Cup, TRAL and ME31B for degradation early in the MZT; the Skp/Cullin/F-box-containing (SCF) complex targets SMG at the end of the MZT. Deleting the C-terminal 233 amino acids of SMG make it immune to degradation. We show that artificially persistent SMG downregulates the zygotic re-expression of mRNAs whose maternal contribution is cleared by SMG. Thus, clearance of SMG permits an orderly MZT.

2020-06-05 | PXD016523 | Pride

Single-cell chromatin accessibility profiling of mesoderm development in wild-type and mutant embryos

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Transcription profiling of zebrafish embryos injected with DrC1q-like morpholino and control morpholino

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2008-06-16 | E-GEOD-8800 | biostudies-arrayexpress

Expression data from early Zebrafish embryos after knockdown of mir-34

Project description:microRNAs play crucial roles in the early development of an organism. However the regulation of transcription through the action of microRNAs during the initial embyonic development has not been studied. We used microarrays to detail the effect of maternal microRNA mir-34 in regulation of zygotic trancription during the initial stages of Zebrafish embryonic development from one cell stage through the maternal-zygotic transition up to 24 hours post fertilization. Zebrafish embryos were selected at specific stages of early embryonic development (1, 7, and 24 hours post fertilization). RNA was extracted and hybridized to Affymetrix microarrays. The embryos were injected with anti-microRNA LNA and were kept for constant monitoring for the indicated time points. A mockLNA was injected as a control. The embryos were visualized for any visible developmental abnormalities.

2013-04-03 | E-GEOD-32360 | biostudies-arrayexpress

Transcription profiling of Drosophila melanogaster at multiple developmental stages to examine morphogenesis of epithelial tissue

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2007-10-31 | E-GEOD-3955 | biostudies-arrayexpress

Protein expression profiling in eggs and embryos from control and Eif4e1b knockout female mice.

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2023-06-12 | PXD041583 | Pride

eIF4E1b is a non-canonical eIF4E required for maternal mRNA dormancy

Project description:Maternal mRNAs are essential for protein synthesis during oogenesis and early embryogenesis. To adapt translation to specific needs during development, maternal mRNAs are translationally repressed by shortening the polyA tails. While mRNA deadenylation is associated with decapping and degradation in somatic cells, maternal mRNAs with short polyA tails are stable. Here we report an essential role for the germline-specific paralog of the mRNA cap-binding factor eIF4E, known as eIF4E1b, in the storage and repression of maternal mRNAs with short polyA tails. eIF4E1b binds to the mRNA cap and is targeted to ribonucleoprotein complexes through its direct interaction with eIF4ENIF1/4E-T. In early embryos, eIF4E1b binds to a specific set of translationally repressed mRNAs with short or no polyA tails, such as histone mRNAs, which are translated later on during embryogenesis. Consistent with an important role in maternal mRNA dormancy, mutation of eIF4E1b in zebrafish impairs female germline development. Understanding the mechanism and function of eIF4E1B provides new insights into fundamental post-transcriptional regulatory principles governing early vertebrate development.

2024-04-12 | PXD042434 | Pride

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