Mus musculus
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA117635 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:Dgcr8 and Dicer are both important components of the microRNA biogenesis pathway while Dicer is also implicated in biogenesis of other types of small RNAs such as siRNAs and mirtrons. Here we performed microarray analysis of WT, Dgcr8 and Dicer knockout ES cells to identify mRNAs differentially regulated upon loss of Dgcr8 and Dicer.
2009-09-23 | GSE16923 | GEO
Project description:To determine whether DGCR8 is required for maturation of all miRNAs, we performed miRNA microarray analysis. Using RNA from wild-type ES cells as our reference sample, we observed a global loss of miRNAs in DGCR8 knockout cells, but normal levels of expression in DGCR8 heterozygous cells. The similarity in expression levels between wild-type and heterozygous cells suggests that DGCR8 is not limiting in the maintenance of steady-state levels of miRNAs in ES cells. Of the eighty-nine miRNA array probes that showed significant signals with wild-type RNA, eighty-two were drastically reduced in the DGCR8 knockout cells. The remaining seven were not significantly altered in the DGCR8 knockout cells, but at least four of these seven miRNAs appear to be due to unavoidable contamination with RNA from the mouse embryonic fibroblast (MEF) feeder cells used for ES cell culture prior to the isolation of RNA. These miRNAs were highly expressed in the MEFs and decreased when the ES cells were temporarily passaged on gelatin-coated plates without feeders. The remaining three showed similar levels of expression in the heterozygous, knockout and MEF feeder cells. Therefore, these signals may be small RNAs that are not processed with the help of the microprocessor complex. Alternatively, these signals may result from unavoidable degradation products within the purified small RNA population. In either case, our results show that DGCR8 is broadly required for miRNA processing with little evidence for redundancy or bypass mechanisms. Keywords: cell type comparison, genetic modification MicroRNAs extracted from wild-type, DGCR8 heterozygous knockout and DGCR8 homozygous knockout were analyzed by microarray. In each array, wild-type samples serve as reference. Ratios were normalized based on positive control RNAs on the array. To determine if some of signals appeared in DGCR8 knockout ES cells are due to mice embryonic fibroblast (MEF) feeder cell contamination (this is unavoidable because these ES cells were grown on MEFs and passaged off MEF before RNA extraction). Two independent DGCR8 knockout ES cell lines were analyzed. For each cell line, array hybridization was done in duplicates. For DGCR8 heterozygous knockout ES cells, two independent batches of RNA samples were prepared and analyzed.
2010-06-11 | E-GEOD-6586 | biostudies-arrayexpress
Project description:To determine whether DGCR8 is required for maturation of all miRNAs, we performed miRNA microarray analysis. Using RNA from wild-type ES cells as our reference sample, we observed a global loss of miRNAs in DGCR8 knockout cells, but normal levels of expression in DGCR8 heterozygous cells. The similarity in expression levels between wild-type and heterozygous cells suggests that DGCR8 is not limiting in the maintenance of steady-state levels of miRNAs in ES cells. Of the eighty-nine miRNA array probes that showed significant signals with wild-type RNA, eighty-two were drastically reduced in the DGCR8 knockout cells. The remaining seven were not significantly altered in the DGCR8 knockout cells, but at least four of these seven miRNAs appear to be due to unavoidable contamination with RNA from the mouse embryonic fibroblast (MEF) feeder cells used for ES cell culture prior to the isolation of RNA. These miRNAs were highly expressed in the MEFs and decreased when the ES cells were temporarily passaged on gelatin-coated plates without feeders. The remaining three showed similar levels of expression in the heterozygous, knockout and MEF feeder cells. Therefore, these signals may be small RNAs that are not processed with the help of the microprocessor complex. Alternatively, these signals may result from unavoidable degradation products within the purified small RNA population. In either case, our results show that DGCR8 is broadly required for miRNA processing with little evidence for redundancy or bypass mechanisms. Keywords: cell type comparison, genetic modification
2007-01-31 | GSE6586 | GEO
Project description:Murine ES Cells: wild-type (WT) vs. Mto1 knockout (KO)
| PRJNA384768 | ENA
Project description:Microarray analyses for wild type and Mof knockout murine ES cells.
| PRJNA158985 | ENA
Project description:Dicer, which is required for the processing of both microRNAs (miRNAs) and small interfering RNAs (siRNAs), is essential for oocyte maturation. Oocytes express both miRNAs and endogenous siRNAs (endo-siRNAs). To determine whether the abnormalities in Dicer knockout oocytes during meiotic maturation are secondary to the loss of endo-siRNAs and/or miRNAs, we deleted Dgcr8, which encodes a RNA binding protein specifically required for miRNA processing. In striking contrast to Dicer, Dgcr8 deficient oocytes matured normally and, when fertilized with wild-type sperm, produced healthy appearing offspring, even though miRNA levels were reduced to similar levels as Dicer deficient oocytes. Furthermore, the deletion of both maternal and zygotic Dgcr8 alleles did not impair preimplantation development including the determination of the inner cell mass (ICM) and trophectoderm. Most surprisingly, the mRNA profiles of wild-type and Dgcr8 null oocytes were essentially identical while Dicer null oocytes showed hundreds of misregulated transcripts. These findings show that miRNA function is globally suppressed during oocyte maturation and preimplantation development and that endo-siRNAs, rather than miRNAs, underlie the Dicer knockout phenotype in oocytes. We used microarrays to understand at the global level how loss of miRNAs and/or siRNAs is impacting mRNA levels in mouse oocytes.
2010-02-05 | GSE19894 | GEO
Project description:We report RNA sequencing data from induced Schwann cell specific knockouts for DICER and DGCR8 as well as crush injured wild type animals. Induced deletion of DICER and DGCR8 results in expression of numerous injury response genes suggesting a requirement of those proteins in maintaining the myelinated Schwann cell fate.
2018-10-08 | GSE109074 | GEO
Project description:Canonical microRNAs (miRNAs) require two processing steps: the first by the Microprocessor, a complex of DGCR8 and Drosha, and the second by Dicer. dgcr8delta/delta mouse embryonic stem cells (mESCs) have less severe phenotypes than dicer1delta/delta mESCs, suggesting a physiological role for Microprocessor-independent, Dicer-dependent small RNAs. To identify these small RNAs with unusual biogenesis, we performed high-throughput sequencing from wild type, dgcr8delta/delta, and dicer1delta/delta mESCs. Several of the DGCR8-independent, Dicer-dependent RNAs were non-canonical miRNAs. These derived from mirtrons and a newly identified subclass of miRNA precursors, which appears to be the endogenous counterpart of short hairpin RNAs (shRNAs). Our analyses also revealed endogenous siRNAs resulting from Dicer cleavage of long hairpins, the vast majority of which originated from one genomic locus with tandem, inverted short interspersed nuclear elements (SINEs). Our results extend the known diversity of mammalian small-RNA generating pathways and show that mammalian siRNAs exist in tissues outside of oocytes. Small RNAs were sequenced from wt, dgcr8(-), and dicer(-) mouse ES cells and the frequencies of small RNA types compared between the three. This record includes Illumina-platform-generated datasets from all three samples and 454-platform-generated datasets from wt and dgcr8(-) samples. [raw data files are unavailable]
2008-09-09 | E-GEOD-12521 | biostudies-arrayexpress
Project description:Expression data from wild-type and Rybp-deficient ES cells
| PRJNA154503 | ENA