Methylation Sequencing data of MII oocytes fromTet2-ko and WT mice
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ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE145547 | GEO | 2020/04/01
REPOSITORIES: GEO
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Project description:Chromosome aneuploidy increases in oocytes with maternal age, and is considered the leading cause for the increased incidence of infertility, miscarriage, and birth defects. Using mRNA-Sequencing of oocytes from 12 month old mouse versus 3 month young mouse, we identified a spindle assembly checkpoint gene, BubR1, whose expression was significantly decreased. We employed a mRNA microinjection based approach to increase BubR1 expression in aging oocytes. We find that increased expression of BubR1 protects against aneuploidy and chromosome misalignment in aging oocytes. After in vitro fertilization, the embryos derived from BubR1 increased expression aging oocytes exhibited chromosome stability as robust as those of the young ones. Furthermore, following embryo transfer, these embryos showed greatly improved developmental competency, with comparable levels of full-term development to those of the young ones. These results indicate that the decline in oocyte quality may be reversible and could lead to treatments that prolong female fertility. Examination of the effect of maternal aging on the mRNA expression in the mature oocytes of the female mice. Naturally ovulated mature oocytes (MII stage) were collected from 6 young (3 month) and 6 aging (12 month) female mice (3 oocytes per mice, 18 oocytes for each group).
2014-05-10 | E-GEOD-57482 | biostudies-arrayexpress
Project description:Two replicates of GV, GVBD, and MII oocytes were subjected to the 6-plex TMT labeling, HP-RP fractionation, and LC-MS/MS analysis. Two labeling experiments were performed for the total four replicates of each stage of oocytes.
2022-02-15 | PXD018777 | Pride
Project description:We analyzed 3 repeats of 12 samples of mouse spermatogonia cells including 3-month-old WT and 3 month-old Tet1, 11-month-old WT and 11-month-old Tet1, aimed to find Tet1 function on male fertility.
2020-01-18 | GSE140014 | GEO
Project description:Background: Early embryonic development is governed by maternal transcripts stored within the oocyte during oogenesis. Transcriptional activity of the oocyte ultimately dictates its developmental potential and may be influenced by maternal age, resulting in reduced competence of oocytes derived from women of advanced age, compared with the young. In the current study, RNA-Seq was used to perform transcriptome profiling of human GV and MII oocytes derived from young and advanced maternal age women. Participants/Materials and Methods: Cumulus dissection from donated oocytes was performed. GV and MII oocytes underwent deep RNA sequencing using the SMART-Seq v4 Ultra Low Input RNA protocol (Takara-Clontech, USA) and Nextera XT DNA library preparation kit (Illumina, USA). Data processing, quality assessment and bioinformatics analysis were performed using source-software, including FastQC, HISAT2, StringTie, edgeR and DAVID. Results: Following deep single-cell RNA-Seq on GV and MII oocytes, hundreds of transcripts were significantly differentially expressed between young maternal age (YMA) and advanced maternal age (AMA) groups, with the most significant biological processes relating to mitochondrial reserves. The GV to MII transition shares common biological processes between young and AMA groups, however, some genes involved in mitochondria function were altered during ageing. A decrease in mitochondrial-related transcripts was also observed during the GV to MII transition. However, there was a much greater reduction of mitochondrial-related transcripts in MII oocytes of AMA. This observation was confirmed when YMA MII oocytes were compared with the AMA MII group with mitochondrial-related transcripts being significantly higher expressed in the YMA group, including biological processes, such as mitochondrial electron transport and ATP biosynthetic process. These results indicate a higher energy potential in YMA MII oocytes that is decreased with age. Other significantly higher biological processes in the YMA MII group include transcripts involved in the regulation of ubiquitin-dependent degradation. Lack of these transcripts could lead to a non-appropriate removal of oogenesis remnants following fertilisation in the AMA MII group. Discussion: Understanding reproductive ageing effects at the RNA level in human oocytes may reveal differences in the mechanisms regulating the GV to MII transition that impact on oocyte quality in YMA and AMA patients. Further investigations of the up-/down-regulated transcripts during ageing could guide and improved IVF outcomes for AMA patients.
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Project description:The integrity of chromatin, which provides a dynamic template for all DNA-related processes in eukaryotes, is maintained through replication-dependent and -independent assembly pathways. To address the role of replication-independent histone deposition, we deleted the histone H3.3 chaperone Hira in developing mouse oocytes. We show that chromatin of non-replicative developing oocytes is highly dynamic, and that lack of continuous H3.3/H4 deposition alters chromatin structure, resulting in increased DNase I sensitivity, the accumulation of DNA damage, and, ultimately, a severe fertility phenotype. On the molecular level, abnormal chromatin structure leads to a dramatic decrease in the dynamic range of gene expression, the appearance of spurious transcripts, and inefficient de novo DNA methylation. In contrast to the only minor transcriptional phenotype observed in mouse pluripotent cells, we unequivocally show the importance of histone replacement and chromatin homeostasis for transcriptional regulation and normal developmental progression in an in vivo context. RNA-Seq on 4 Hiraf/f and 4 Hiraf/f, Zp3-Cre single MII oocytes.
2015-11-03 | E-GEOD-73381 | biostudies-arrayexpress
Project description:The integrity of chromatin, which provides a dynamic template for all DNA related processes in eukaryotes, is maintained through replication dependent and independent assembly pathways. To address the role of replication independent histone deposition, we deleted the histone H3.3 chaperone Hira in developing mouse oocytes. We show that chromatin of non-replicative developing oocytes is highly dynamic, and that lack of continuous H3.3/H4 deposition alters chromatin structure, resulting in increased DNase I sensitivity, the accumulation of DNA damage, and, ultimately, a severe fertility phenotype. On the molecular level, abnormal chromatin structure leads to a dramatic decrease in the dynamic range of gene expression, the appearance of spurious transcripts, and inefficient de novo DNA methylation. In contrast to the only minor transcriptional phenotype observed in mouse pluripotent cells, we unequivocally show the importance of histone replacement and chromatin homeostasis for transcriptional regulation and normal developmental progression in an in vivo context. RNA-Seq on 4 Hiraf/f and 4 Hiraf/f, Gdf9-Cre+ single MII oocytes
2015-11-03 | E-GEOD-66931 | biostudies-arrayexpress
Project description:Expression data from prepubertal, peripubertal, and adult derived mouse oocytes, and from germinal vesicle (GV), in vivo matured, and in vitro matured mouse oocytes. Oocytes derived from prepubertal females, or oocytes matured in vitro, are less developmentally competent compared to adult derived, or in vivo matured, oocytes, indicated by decreased embryonic development. One potential mechanism for decreased developmental potetential in prepubertal or in vitro matured oocytes is inadequate or inappropriate RNA degradation during oocyte maturation (progression from GV to MII). To investigate mechanisms involved in establishing oocyte cytoplasmic maturation and developmental competence, Affymetrix GeneChip microarrays were used. Keywords: Oocyte developmental competence The study encompassed three experimental designs using female B6D2F1 mice: 1) In vitro matured oocytes were obtained from d20 (prepubertal), d26 (peripubertal), and 7-8 wk old (adult) mice; 2) in vivo and in vitro matured oocytes were obtained from d26 mice; and 3) GV, in vivo matured, and in vitro matured oocytes were obtained from 7-8 wk old mice. RNA was extracted from pools of 150 oocytes and hybridized onto the Affymetrix microarrays.
2010-07-12 | E-GEOD-12432 | biostudies-arrayexpress
Project description:Transcriptome analysis of rhesus monkey MII oocytes
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Project description:We analyzed the functions of BTG family proteins in maternal mRNA degradation in mouse oocytes. By comparing the degradation of transcripts in WT oocytes and KO oocytes, we are able to know the defects in maternal mRNA clearance in BTG4-deleted oocytes, and identified the BTG4 target genes in oocyte cyplasmic maturation. 2 WT oocyte samples at GV stage, 2 WT oocyte samples at MII stage, 2 Btg4-/- oocyte samples at GV stage and 2 Btg4-/- oocyte samples at MII stage?2 WT embryo samples at zygote stage, 2 WT embryo samples at 2-cell stage, 2 Btg4-/- embryo samples at zygote stage and 2 Btg4-/- embryo samples at 2-cell stage , and a WT GV oocyte, a WT MII oocyte, a Erk-/- GV oocyte and a Erk-/- MII oocyte are performed RNA sequencing.
2016-03-16 | E-GEOD-71257 | biostudies-arrayexpress
Project description:We profiled transcriptomes from Cnot6l deadenylase knock-out mouse GV oocytes, MII eggs and 1-cell zygotes in order to analyse its function during the oocyte-to-embryo (OET) transition. Transcriptome of wild-type golden hamster GV oocytes was also profiled.
2018-07-10 | GSE116771 | GEO