Nascent RNA sequencing during embryonic development of tinWT and tinmDPE embryos
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA916494 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR22907763.fastq.gz | Fastqsanger.gz | |||
| SRR22907764.fastq.gz | Fastqsanger.gz | |||
| SRR22907765.fastq.gz | Fastqsanger.gz | |||
| SRR22907766.fastq.gz | Fastqsanger.gz | |||
| SRR22907767.fastq.gz | Fastqsanger.gz |
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Project description:nascent RNA sequencing during embryonic development of tinWT and tinmDPE embryos
2023-09-11 | GSE221852 | GEO
Project description:Nucleosome arrangement in promoter regions has been shown to play an important role in gene regulation. Genome wide studies in yeast, flies, worms, mammalian ES and transformed cell lines have found well positioned nucleosomes with an area of nucleosome depletion flanking transcription start sites. This Nucleosome arrangement has been shown to be dependent on sequence (cis-regulatory factors), DNA binding factors (trans-regulatory factors) and ATP-dependant chromatin modifiers. However, little is understood about how the nascent embryonic genome positions nucleosomes during development. This is particularly intriguing since the embryonic genome undergoes a whole scale rechromatinization event upon fusion of sperm and oocyte. Using four stages of early embryonic zebrafish development we map nucleosome positions at the promoter region of 34 zebrafish hox genes. We find that nucleosome arrangement at the hox promoters is a dynamic process which happens over several stages. We also find evidence that trans-regulatory factors play a greater role in nucleosome positioning over cis-regulatory elements. Finally we provide evidence that transcriptional activation is the driving force behind the arrangement of nucleosomes at the promoters of hox gene during early development. Five tissue types: 2, 4, 6, and 9 hours post fertilzation embryos and ZF4 cell line. Three treatments: Untreated (WT), Retinoic Acid treated embryos (RA), DEAB treated embryos. Two biological replicates for DNA input samples.
2013-12-09 | E-GEOD-43757 | biostudies-arrayexpress
Project description:In mammals, totipotent pre-implantation embryos are formed by fusion of highly differentiated oocytes and spermatozoa. Acquisition of totipotency concurs with remodeling of chromatin states of parental genomes (“epigenetic reprogramming”), changes in maternally contributed transcriptome and proteome, and zygotic genome activation. Genomes of mature germ cells are more proficient in supporting embryonic development than those of somatic cells. It is currently unknown whether transgenerational inheritance of chromatin states present in mature gametes underlies the efficacy of early embryonic development after natural conception. Here, we show that Ring1 and Rnf2, two core components of the Polycomb Repressive Complex 1 (PRC1), serve redundant gene regulatory functions during oogenesis that are required to support embryonic development beyond the two-cell stage. Numerous developmental regulatory genes that are established Polycomb targets in various somatic cell types are de-repressed in Ring1/Rnf2 double mutant (dm) fully grown germinal vesicle (GV) oocytes. Translation of tested aberrant maternal transcripts is, however, delayed until after fertilization. Exchange of maternal pro-nuclei between control and Ring1/Rnf2 maternally dm early zygotes demonstrates an essential role for Ring1 and Rnf2 during oogenesis in defining cytoplasmic and nuclear maternal contributions that are both essential for proper initiation of embryonic development. A large number of genes up-regulated in Ring1/Rnf2 dm GV oocytes harbor PRC2-mediated histone H3 lysine 27 trimethylation (H3K27me3) in spermatozoa and in embryonic stem cells (ESCs), and are repressed during normal oogenesis and early embryogenesis. These data strongly support the model that Polycomb acts in the female and male germline to silence differentiation inducing genes and to program chromatin states, thereby sustaining developmental potential across generations. Expression profiling of late 2-cell embryos was performed with the following genotypes: maternal Ring1-Rnf+ (control), maternal Ring1-Rnf2- (maternal Ring1/Rnf2 double mutant). These embryos were obtained by crossing Ring1-/-Rnf2F/F control females or Ring1-/-Rnf2F/F Zp3-cre expreimental females, respectively, to Ring1+/+Rnf2F/F control males. To distinguish between maternal transcripts present in the 2-cell embryo and newly (embryonicaly) transcribed transcripts, embryos from both genotypes were either not treated (expression profiling therefore shows all maternal and embryonic transcripts) or alpha-amanitin treated (alpha-amanitin inhibits de novo transcription, therefore expression profiling of treated embryos will only show maternal transcripts).
2012-05-07 | GSE28710 | GEO
Project description:In mammals, totipotent pre-implantation embryos are formed by fusion of highly differentiated oocytes and spermatozoa. Acquisition of totipotency concurs with remodeling of chromatin states of parental genomes (âepigenetic reprogrammingâ), changes in maternally contributed transcriptome and proteome, and zygotic genome activation. Genomes of mature germ cells are more proficient in supporting embryonic development than those of somatic cells. It is currently unknown whether transgenerational inheritance of chromatin states present in mature gametes underlies the efficacy of early embryonic development after natural conception. Here, we show that Ring1 and Rnf2, two core components of the Polycomb Repressive Complex 1 (PRC1), serve redundant gene regulatory functions during oogenesis that are required to support embryonic development beyond the two-cell stage. Numerous developmental regulatory genes that are established Polycomb targets in various somatic cell types are de-repressed in Ring1/Rnf2 double mutant (dm) fully grown germinal vesicle (GV) oocytes. Translation of tested aberrant maternal transcripts is, however, delayed until after fertilization. Exchange of maternal pro-nuclei between control and Ring1/Rnf2 maternally dm early zygotes demonstrates an essential role for Ring1 and Rnf2 during oogenesis in defining cytoplasmic and nuclear maternal contributions that are both essential for proper initiation of embryonic development. A large number of genes up-regulated in Ring1/Rnf2 dm GV oocytes harbor PRC2-mediated histone H3 lysine 27 trimethylation (H3K27me3) in spermatozoa and in embryonic stem cells (ESCs), and are repressed during normal oogenesis and early embryogenesis. These data strongly support the model that Polycomb acts in the female and male germline to silence differentiation inducing genes and to program chromatin states, thereby sustaining developmental potential across generations. Expression profiling of late 2-cell embryos was performed with the following genotypes: maternal Ring1-Rnf+ (control), maternal Ring1-Rnf2- (maternal Ring1/Rnf2 double mutant). These embryos were obtained by crossing Ring1-/-Rnf2F/F control females or Ring1-/-Rnf2F/F Zp3-cre expreimental females, respectively, to Ring1+/+Rnf2F/F control males. To distinguish between maternal transcripts present in the 2-cell embryo and newly (embryonicaly) transcribed transcripts, embryos from both genotypes were either not treated (expression profiling therefore shows all maternal and embryonic transcripts) or alpha-amanitin treated (alpha-amanitin inhibits de novo transcription, therefore expression profiling of treated embryos will only show maternal transcripts). 11 samples were analyzed: 3 biological replicates (except alpha-amanitin treated maternal Ring1/Rnf2 double mutant, where only 2 replicates were analyzed) of each genotype and treatment group were analyzed. Each sample contains 40 late 2-cell embryos.
2012-05-06 | E-GEOD-28710 | biostudies-arrayexpress
Project description:To characterize the effect of cell cyle elongation on nascent transcription during zygotic genome activation (ZGA) of Xenopus laevis embryos, we microinjected 5-ethynyl uridine (EU) into 1-cell stage embryos and treated the embryos with 0.2 mg/ml of cycloheximide (CHX) to arrest them in interphase from 5 hpf to 7.5 hpf. Control and CHX-arrested embryos were collected for isolating total RNAs, followed by biotinylation using disulfide biotin azide via click reaction and purification of nascent transcripts using streptavidin beads. Libraries were constructed and sequenced on illumina NextSeq 500.
2022-08-22 | GSE201834 | GEO
Project description:This SuperSeries is composed of the following subset Series: GSE23033: Polycomb function during oogenesis is required for mouse early embryonic development (germinal vesicle oocytes) GSE28710: Polycomb function during oogenesis is required for mouse early embryonic development (2-cell embryos) Refer to individual Series
2012-05-06 | E-GEOD-28711 | biostudies-arrayexpress
Project description:To characterize the nascent transcriptome during zygotic genome activation (ZGA) of Xenopus laevis embryos, we microinjected 5-ethynyl uridine (EU) into 1-cell stage embryos and isolated total RNAs from whole embryos at 5, 6, 7, 8 and 9 hours post-fertilization (hpf) at room temperature, respectively, covering the stages of pre-ZGA to widespread ZGA (stage 7-9). To purify nascent transcripts, total RNAs were biotinylated using disulfide biotin azide via click reaction and biotinylated nascent transcripts were purified using streptavidin beads. Libraries were constructed from using the total RNA ('All'), nascent transcripts ('Bead') and the flowthrough after purification of nascent transcripts ('FL'), respectively. To categorize maternal-zygotic (MZ) genes and zygotic-only (Z) genes, total RNAs from eggs were isolated for constructing libraries. All libraries were sequenced on illumina NextSeq 500.
2022-08-22 | GSE201835 | GEO
Project description:Cellular senescence disables the proliferation of damaged cells and it is relevant for cancer and aging. Here, we show that cellular senescence occurs during mammalian embryonic development. Specifically, we have focused on the mouse regressing mesonephros and the endolymphatic sac of the inner ear. Senescence is characterized by SAM-NM-2G activity, heterochromatinization, and proliferative arrest. Mechanistically, developmentally-programmed senescence at the mesonephros and endolymphatic sac is strictly dependent on p21, but independent of DNA damage, p53 or other cell cycle inhibitors, and it is regulated by the TGFM-NM-2/SMAD and PI3K/FOXO pathways. Developmentally-programmed senescence is followed by macrophage infiltration and clearance of senescent cells. Abrogation of senescence by p21 deletion is only partially compensated by apoptosis and originates detectable developmental abnormalities. Importantly, high levels of p21 are also associated to the regressing mesonephros and endolymphatic sac in human embryos. These findings place cellular senescence as a relevant morphogenic process during embryonic development. We microdissected mesonephric tubules from senescent (WT) and non-senescent (p21-null) embryos to get information about this new senescence that occurs during embryogenesis.
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