Project description:Poly-ribosomal mRNA from pools of 75 bovine oocytes at the germinal vesicle(GV) and metaphase II(MII) stages were isolated by sucrose fractionation then compared through microarray hybridization.
Project description:Poly-ribosomal mRNA from pools of 75 bovine oocytes at the germinal vesicle(GV) and metaphase II(MII) stages were isolated by sucrose fractionation then compared through microarray hybridization. 3 biological replicates from germinal vesicle(GV) and metaphase II(MII) bovine oocytes were hybridized against each other while alternating dyes. One additional technical replicate (dye-swap of one of the previous hybridizations) was added to balance dye usage. The normalized log2 ratio (GV/MII) data is provided in the 'normalized_data.txt' file. Please note that data were scanned/extracted using a different Agilent reference file, and thus the feature extraction number for a given probe (in both normalized and raw data files) is different from that in the official Agilent-041017 platform (GPL18537). The reference file used for this study is provided as a Series supplementary file (041017_D_DNAFront_BCBottom_20120517.txt).
Project description:Comparative analysis of bovine, mouse and xenopus oocyte transcript profiles. The results from bovine and xenopus germinal vesicle stage oocytes in this experiment were compared to previously-published microarray data on preimplantation development in the mouse (Carter 2003).
Project description:Polyadenylated RNA from individual germinal vesicle and metaphase II ooyctes was amplified and processed for Illumina sequencing. Increases in polyadenylated transcript abundance were observed and are likely due to cytoplasmic polyadenylation. Transcriptomic analysis of GV and MII bovine oocytes.
Project description:The bidirectional communication between bovine oocytes and CCs is vital for functioning and development of both cell types. We used microarray to identify genes which are differentially expressed between germinal vesicle (GV)- and metaphase II (MII)-stage oocytes and CCs and those differentially expressed when oocytes mature with or without the other. We also identified genes differentially expressed between CCs at GV and MII stages.
Project description:In vitro maturation (IVM) of the oocytes is a routine method in bovine embryo production. The competence of bovine oocytes to develop into embryo after IVM and in vitro fertilization (IVF) is lower as compared to in vivo preovulatory oocytes. Cumulus cells (CC) that enclose an oocyte are involved in the acquisition of oocyte quality during maturation. Using transcriptomic approach we compared cumulus cells gene expression during IVM with that in vivo preovulatory period. Global transcriptional profiling was performed using cumulus cells collected from mature bovine oocytes (metaphase-II stage) after maturation performed either in vivo or in vitro. In vivo matured cumulus cells were collected from ovulatory follicles of Montbeliard adult cows by ovum pick-up in vivo (OPU, n=4). In vitro matured cumulus cells were recovered from the oocytes after 22h of in vitro culture of cumulus-oocyte complexes (50 COC per experiment) from 2-6 mm ovarian follicles of adult cows (MIV, n=4). Gene expression analysis was carried out between in vivo and in vitro matured cumulus representing a total of 8 slides (dye swap protocol)
