Project description:Absence of Ocular albinism type 1 (Oa1) gene is associated with abnormal pigmentation and misrouting of retinal ganglion cell (RGC) axons at the optic chiasm of the brain. Expression of the Oa1 gene is tightly correlated with development of RGCs. In mice the Oa1 gene is expressed at embryonic day (E) 10.5. Soon afterwards the RGCs appear and at E15.5 majority of their axons pass through the optic chiasm. So comparison of microarrays hybridized with mRNAs from E15.5 Ocular albino (Oa1-/-) and Wild Type (WT) mice eyes will help us identify candidate genes critical for Ocular albinism. We used microarray analysis to study the differential expression of genes between E15.5 eyes from Wild type and Oa1-/- mice.
Project description:Single-cell proteomics can reveal the changing protein composition of differentiating cells. We used shotgun mass spectrometry to determine the abundant proteins present in single or small pools of subpicoliter-sized cells from the embryonic day 15 (E15) utricle of the chicken inner ear, when many hair cells are differentiating from progenitor (supporting) cells. The actin monomer binding protein thymosin β4 (TMSB4X) was present in E15 progenitor cells at nearly equimolar levels relative to actin, but dropped to one-tenth that value in hair cells, with little change in total actin. Single-cell RNA-seq analysis of E15 utricle cells showed that TMSB4X transcripts fell in abundance once hair-cell differentiation initiated. These results suggest that most actin is sequestered in progenitor cells, but upon differentiation to hair cells, actin is released, permitting assembly of the sensory hair bundle.
Project description:In vitro-produced (IVP) embryos continue to surpass in vivo-produced (IVV) embryos worldwide. However, there is increased concern about the current drawbacks of IVP embryos, such as a higher pregnancy loss in the early stages of development often associated with impairment in conceptus elongation, which begins from ~day 13 of gestation. The embryonic disc (ED) and the embryonic membranes (EEM) differentiate during this period, and their transcriptomes might be impacted by the in vitro procedures, impairing conceptus development. This study aimed to identify changes in the ED and EEM transcriptome of day 15 IVP conceptuses compared to those conceived in vivo
Project description:Effects of in vitro production on the transcriptomic profile of the embryonic disc and extra-embryonic membranes of day 15 elongated bovine embryo.
Project description:The gene expression profiles of control vs AGTR2 knockout mouse whole brains at developmental stage E15 and postnatal day 1 were examined. Experiment Overall Design: Embryonic day 15: six biological control replicates and eight biological AGTR2 knockout replicates, one control and knockout replicate to an array with a dye-swap, except for 2 without a dye-swap Experiment Overall Design: Postnatal day 1: four biological control replicates and four biological AGTR2 knockout replicates, one control and knockout replicate to an array with a dye-swap
Project description:We aimed to study the effects of CSF2 treatment on the transcriptome of the Day 15 female and male embryo. Within the raw files, channel 1= Cy3 and channel 2= Cy5 Transcriptional profiling of bovine extra-embryonic membrane at Day 15 post-insemination produced by IVF. Oocytes were matured and fertilized in vitro using a single Holstein bull. After 5 days in vitro culture, the embryos were either treated with 10 ng/ml bovine recombinant CSF2 or the Control (DPBS/BSA) until Day 7. At Day 7, the embryos were transferred into recipients. At day 15 following insemination, embryos were flushed and collected for total RNA and gDNA extraction. The gender of the embryos were determined by PCR prior to microarray analysis. CSF2 males were compared to Control males while CSF2 females were compared to Control females. Control females were also compared to control males.
Project description:We aimed to study the effects of CSF2 treatment on the methylome of the Day 15 female and male embryo. Methylomic profiling of bovine extra-embryonic membrane at Day 15 post-insemination produced by IVF. Oocytes were matured and fertilized in vitro using a single Holstein bull. After 5 days in vitro culture, the embryos were either treated with 10 ng/ml bovine recombinant CSF2 or the Control (DPBS/BSA) until Day 7. At Day 7, the embryos were transferred into recipients. At day 15 following insemination, embryos were flushed and collected for total RNA and gDNA extraction. The gender of the embryos were determined by PCR prior to microarray analysis. CSF2 males were compared to Control males while CSF2 females were compared to Control females
Project description:We aimed to study the effects of CSF2 treatment on the transcriptome of the Day 15 female and male embryo. Within the raw files, channel 1= Cy3 and channel 2= Cy5
Project description:Purpose: To characterize microRNAs (miRNAs) and their possible roles in high myopia by using next generation sequencing Methods: Aqueous humor samples were obtained from 15 highly myopic eyes and 15 cataract eyes at the onset of surgery. miRNA next generation sequencing and bioinformatics analyses were performed using RNA extracted from aqueous humor samples. Results: A total of 341 miRNAs were detected in the aqueous humor samples of highly myopic eyes; 201 miRNAs were detected in the aqueous humor samples of cataractous control eyes. A total of 249 mature miRNAs and 17 novel miRNAs were differentially expressed during myopia. Possible pathways regulated by these aberrantly expressed miRNAs included the TNF, MAPK, PI3K-Akt, and HIF-1 signaling pathways. Conclusions: The current study provided an overall view of miRNA profiling in the aqueous humor of highly myopic eyes. These profiles may be associated with myopia pathogenesis, and are potential biomarkers.