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Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Comparison of the translational program in oocytes from wild type and Areg KO mice

ABSTRACT: The study tests the hypothesis that maternal mRNA translation in oocytes is sensitive to the environment in which the oocytes mature. Amphiregulin (AREG) is a critical signal for oocyte maturation but also for oocyte developmental competence. Here we have used a genome-wide approach to determine whether the oocyte translational program is affected when oocytes mature in vivo in the absence of AREG. To this aim, polysome arrays were used to define patterns of transcript recruitment to the polysomes in oocytes derived from wild type mice and mice homozygous null for the Areg gene. Forty-eight hours (h) after PMSG injection, mice were stimulated with hCG for 0, or 14 h, and GV, and MII stage oocytes were collected. Polysome bound mRNAs were purified, reverse-transcribed and linearly amplified with WT-Ovation FFPE RNA Amplification System V2 (NuGEN). 5µg cDNA were fragmented and hybridized with Affymetrix Mouse Genome 430.2 array chips. Experiments were done using 3 independent sample sets.

ORGANISM(S): Mus musculus

SUBMITTER: Courtney Onodera

PROVIDER: E-GEOD-46640 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Comparison of the translational program in oocytes from wild type and Areg KO mice

Project description:The study tests the hypothesis that maternal mRNA translation in oocytes is sensitive to the environment in which the oocytes mature. Amphiregulin (AREG) is a critical signal for oocyte maturation but also for oocyte developmental competence. Here we have used a genome-wide approach to determine whether the oocyte translational program is affected when oocytes mature in vivo in the absence of AREG. To this aim, polysome arrays were used to define patterns of transcript recruitment to the polysomes in oocytes derived from wild type mice and mice homozygous null for the Areg gene.

2013-10-02 | GSE46640 | GEO

Polysome-bound mRNA during oocyte maturation

Project description:Oocyte maturation, fertilization, and early embryonic development occur in the absence of gene transcription. Therefore, it is critical to understand at a global level the post-transcriptional events that are driving these transitions. Here, we have used a systems approach by combining polysome mRNA profiling and bioinformatics to identify RNA binding motifs in mRNAs that either enter or exit the polysome pool during mouse oocyte maturation. Association of mRNA with the polysomes correlates with active translation. Forty-eight hours (h) after PMSG injection, mice were stimulated with hCG for 0, 4, or 14 h, and GV-, MI- and MII-stage oocytes were collected. Polysome-bound mRNAs were purified, reverse-transcribed and linearly amplified with the WT-Ovation FFPE RNA Amplification System V2 (NuGEN). 5µg cDNA were fragmented and hybridized with Affymetrix Mouse Genome 430.2 array chips. Experiments were done using 3 independent sample sets.

2012-01-14 | E-GEOD-35106 | biostudies-arrayexpress

Transcriptomic analysis of corona radiata cells after hormonal stimulation (PMSG/hCG)

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Polysome profiling and ribosome footprinting of Drosophila mature oocyte and activated egg

Project description:We use mRNA-seq in combination with polysome profiling to determine translational status for all mRNAs in Drosophila mature oocytes and activated eggs. Puromycin-treated lysates are used as a negative control in polysome profiling experiments. Additionally, we use ribosome footprinting to globally measure translational efficiency of mRNAs in wild type mature oocytes as well as wild type and png mutant activated eggs.

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Identifying the Translatome of WT and Lsm14b KO GV-Stage Oocytes in mice via Scarce Sample Polysome Profiling (SSP-profiling)

Project description:RNA-binding proteins (RBPs) have essential functions during oocyte development.In order to explore the regulatory role of RNA-binding protein LSM14B in oocyte, we Identified the translatome of WT and Lsm14b KO GV-Stage Oocytes in mice via Scarce Sample Polysome Profiling (SSP-profiling).

2023-09-08 | GSE206270 | GEO

HDAC3 maintains oocyte meiosis arrest by repressing amphiregulin expression before the LH surge [mGC-HDACi]

Project description:It is known that granulosa cells (GCs) mediate gonadotropin-induced oocyte meiosis resumption by releasing EGF-like factors in mammal, however, the detail molecular mechanisms remain unclear. Here, we demonstrate that luteinizing hormone (LH) surge induced histone deacetylase 3 (HDAC3) downregulation in GCs is essential for oocyte maturation. Before the LH surge, HDAC3 is highly expressed in GCs. Transcription factors, such as FOXO1, mediates recruitment of HDAC3 to the amphiregulin (Areg) promoter, which suppresses AREG expression. With the LH surge, decreased HDAC3 in GCs enables histone H3K14 acetylation and binding of the SP1 transcription factor to the Areg promoter to initiate AREG transcription and oocyte maturation. Conditional knockout of Hdac3 in granulosa cells in vivo or inhibition of HDAC3 activity in vitro promotes the maturation of oocytes independent of LH. Taking together, HDAC3 in GCs within ovarian follicles acts as a negative regulator of EGF-like growth factor expression before the LH surge.

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HDAC3 maintains oocyte meiosis arrest by repressing amphiregulin expression before the LH surge [HDAC3cKO]

2019-11-17 | GSE139663 | GEO

HDAC3 maintains oocyte meiosis arrest by repressing amphiregulin expression before the LH surge [oocyte-transcriptome]

2019-11-17 | GSE139665 | GEO

Small RNA profiling of human cumulus cells and oocytes

Project description:Cumulus cells are biologically distinct from other follicular cells and perform specialized roles, transmitting signals within the ovary and supporting oocyte maturation during follicular development. The bi-directional communication between the oocyte and the surrounding cumulus cells is crucial for the acquisition of oocyte competence. Using Illumina/deep-sequencing technology, we dissected the small RNAome of pooled human mature MII oocytes and cumulus cells. Cumulus cells and MII mature oocytes small RNA profiles were generated by deep-sequencing, using Illumina 1G sequencer

2015-04-10 | E-GEOD-44792 | biostudies-arrayexpress

Female mating status influences protein composition of mature Drosophila oocytes

Project description:Oocyte composition can directly influence offspring fitness, particularly in oviparous species such as most insects, where it is the primary form of parental investment. Oocyte production is also energetically costly, dependent on female condition and responsive to external cues. We investigated whether mating influences mature oocyte composition in Drosophila melanogaster using a quantitative proteomic approach. Our analyses robustly identified 4,485 oocyte proteins and revealed that stage-14 oocytes from mated females differed significantly in protein composition relative to oocytes from unmated females. Proteins forming a highly interconnected network enriched for translational machinery and transmembrane proteins were increased in oocytes from mated females, including calcium binding and transport proteins. This mating-induced modulation of oocyte maturation was also significantly associated with proteome changes that are known to be triggered by egg activation. We propose that these compositional changes are likely to have fitness consequences and adaptive implications given the importance of oocyte composition, rather than active gene expression, to the maternal-to-zygotic transition and early embryogenesis.

2021-02-24 | PXD022142 | Pride

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