Ontology highlight
ABSTRACT:
OTHER RELATED OMICS DATASETS IN: GSE28519
PROVIDER: PRJNA138965 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:To study the influence of POF on transcription in testis we made expression arrays from dissected testes (Pof mutants and wild type control). It is clear that POF mainly alters the expression of genes on the fourth chromosome Keywords: mutant analysis
2009-03-30 | GSE14516 | GEO
Project description:Analysis of expression in pof mutant and wt 1st instar larvae Keywords: Mutant vs Wt expression
2007-03-22 | GSE5984 | GEO
Project description:Analysis of gene expression in pof deletion mutants. Chromosome 4 genes are down-regulated in pof mutants compared to wildtype control. 200 Drosophila melanogaster first instar larvae were used for each of three biological replicates of y1 w67c23; PofD119/PofD119 and three biological replicates of y1 w67c23 as controls. Keywords: Mutant vs Wt expression
2007-03-22 | GSE6839 | GEO
Project description:Background: Premature ovarian failure (POF) is a clinical condition characterized by the cessation of ovarian function, leading to infertility. The underlying molecular mechanisms remain unclear, and no predictable biomarkers have been identified. This study aimed to investigate the protein and metabolite contents of serum exosomes to identify underlying molecular mechanisms and explore potential biomarkers. Methods: This study was conducted on a cohort consisting of 14 POF patients and 16 healthy controls. The exosomes extracted from the serum of each group were subjected to label-free proteomic and unbiased metabolomic analysis. Differentially expressed proteins and metabolites were annotated. Pathway network clustering was conducted with further correlation analysis. The biomarkers were confirmed by ROC analysis and random forest machine learning. Results: The proteomic and metabolomic profiles of POF patients and healthy controls were compared. Two subgroups of POF patients, Pre-POF and Pro-POF, were identified based on the proteomic profile, while all patients displayed a distinguishable metabolomic profile. Signaling pathway clustering revealed progression of dysfunctional energy metabolism during the development of POF. The differentially expressed proteins and metabolites were highly correlated, with six of them selected as potential biomarkers. ROC curve analysis and random forest machine learning suggested that AFM combined with GE was a diagnostic biomarker for POF. Conclusion: Omic analysis revealed that inflammation and oxidative stress are factors that damage ovarian tissue, but progressive dysfunction of energy metabolism might be the critical pathogenetic pathway contributing to the development of POF. AFM combined with GE together serves as the best biomarker for clinical POF diagnosis.
2024-10-17 | PXD051569 | Pride
Project description:In Drosophila melanogaster, two chromosome-specific targeting and regulatory systems have been described. The male-specific lethal (MSL) complex supports dosage compensation by stimulating gene expression from the male X-chromosome and the protein Painting of fourth (POF) specifically targets and stimulates expression from the heterochromatic 4th chromosome. The targeting sites of both systems are well characterized, but the principles underlying the targeting mechanisms have remained elusive. Here we present an original observation, namely that POF specifically targets two loci on the X-chromosome, PoX1 and PoX2 (POF-on-X). PoX1 and PoX2 are located close to the roX1 and roX2 genes, which encode ncRNAs important for the correct targeting and spreading of the MSL-complex. We also found that the targeting of POF to PoX1 and PoX2 is largely dependent on roX expression and identified a high-affinity target region which ectopically recruits POF. The results presented support a model linking the MSL-complex to POF and dosage compensation to regulation of heterochromatin.
2013-05-27 | GSE45402 | GEO
Project description:modENCODE_submission_3794 This submission comes from a modENCODE project of Gary Karpen. For full list of modENCODE projects, see http://www.genome.gov/26524648 Project Goal: We aim to determine the locations of 125 chromosomal proteins across the Drosophila melanogaster genome. The proteins under study are involved in basic chromosomal functions such as DNA replication, gene expression, gene silencing, and inheritance. We will perform Chromatin ImmunoPrecipitation (ChIP) using genomic tiling arrays. We will initially assay localizations using chromatin from three cell lines and two embryonic stages, and will then extend the analysis of a subset of proteins to four additional animal tissues/stages For data usage terms and conditions, please refer to http://www.genome.gov/27528022 and http://www.genome.gov/Pages/Research/ENCODE/ENCODEDataReleasePolicyFinal2008.pdf EXPERIMENT TYPE: CHIP-chip. BIOLOGICAL SOURCE: Strain: POF mutant Developmental Stage: 3rd Instar Larvae; Genotype: POF [D119]/POF [D119]; Transgene: deletion; NUMBER OF REPLICATES: 4; EXPERIMENTAL FACTORS: Strain POF mutant Antibody POF (MO 459) (target is POF); Developmental Stage 3rd Instar Larvae
2013-02-22 | E-GEOD-44496 | biostudies-arrayexpress
Project description:Analysis of expression in pof mutant and wt 1st instar larvae Experiment Overall Design: 400 1st instar larvae were used for each of 4 biological replicates of pof mutants and 3 replicates of wt larvae.
2007-10-25 | E-GEOD-5984 | biostudies-arrayexpress
Project description:Two chromosome-targeting and gene regulatory systems are present in Drosophila melanogaster. The male X-chromosome is targeted by the male-specific lethal complex believed to mediate the two-fold up-regulation of the X-linked genes. The highly heterochromatic 4th chromosome is specifically targeted by the Painting of Fourth (POF) protein which together with heterochromatin protein 1 (HP1) modulate the expression level of genes on the 4th chromosome. Here we report high-resolution mapping of POF and HP1 on the 4th chromosome using chromatin immunoprecipitation followed by tiling microarrays (ChIP-chip) in S2 cells and salivary glands. The enrichments are compared to transcript profiles of the two cell types used. POF specifically binds to genes with a strong preference for exons. The POF binding profile correlates to the binding profile of HP1 which in addition displays a typical “peak” in the promoter regions of bound genes. POF and HP1 binds to active genes and the binding correlates with levels of transcription and changes in binding levels are paralleled by a comparable change in transcription. Our results provide a high resolution description of the chromosome 4 specific gene regulatory system provided by the combinatorial effects of POF and HP1. Keywords: ChIP-chip
2007-10-03 | GSE8296 | GEO