Nuclear Organization of Lens Epithelium and Fiber Cells in Newborn Lens
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA1020165 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR26152458.fastq.gz | Fastqsanger.gz | |||
| SRR26152459_1.fastq.gz | Fastqsanger.gz | |||
| SRR26152459_2.fastq.gz | Fastqsanger.gz | |||
| SRR26152460_1.fastq.gz | Fastqsanger.gz | |||
| SRR26152460_2.fastq.gz | Fastqsanger.gz |
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Project description:Cellular differentiation is marked by temporally and spatially coordinated gene expression regulated at multiple levels within the nucleus. Sequence-specific DNA-binding transcription factor CTCF EDIT. Topologically associated domains (TADs). Using Hi-C, we investigated changes in chromatin organization between newborn (P0.5) mouse lens fiber and epithelium and compared them to embryonic stem (ES) cells. Compartments A and B. Using ChIP-seq, we determined localization of CTCF in both lens tissues Formation of lens-specific TADs is demonstrated via comparative studies of chromatin at Pax6, Prox1, Gata3, Hsf4, and crystallin loci (to be updated) between lens and ES cell nuclei. Our study has generated the first data on nuclear organization in lens epithelium and lens fibers and directly compared these data with ES cells.
2023-10-16 | GSE243851 | GEO
Project description:Genome-wide approach to identify the cell-autonomous role of Snf2h in lens fiber cell terminal differentiation. Differential gene expression was analyzed in Snf2h lens-conditional knockout and wildtype newborn mouse eyeballs, with subsequent comparison of this data with the Brg1 lens-conditional knockout mouse eyes expression data (GSE25168). Four biological replicate experiments were performed.
2012-10-18 | E-GEOD-41608 | biostudies-arrayexpress
Project description:Genome-wide approach to identify the cell-autonomous role of Snf2h in lens fiber cell terminal differentiation. Differential gene expression was analyzed in Snf2h lens-conditional knockout and wildtype newborn mouse eyeballs, with subsequent comparison of this data with the Brg1 lens-conditional knockout mouse eyes expression data (GSE25168).
2012-10-18 | GSE41608 | GEO
Project description:Differential expression of HSF4 in null newborn mouse and wildtype lenses was examined to identify putative downstream targets of HSF4. To examine roles of Brg1 in mouse lens development, a dnBrg1 transgenic construct was expressed using the lens-specific aA-crystallin promoter in postmitotic lens fiber cells. Morphological studies revealed abnormal lens fiber cell differentiation in transgenic lenses resulting in cataract. Electron microscopic studies showed abnormal lens suture formation and incomplete karyolysis (denucleation) of lens fiber cells. To identify genes regulated by Brg1, RNA expression profiling was performed in E15.5 embryonic wild type and dnBrg1 transgenic lenses. In addition, comparisons between differentially expressed genes in dnBrg1 transgenic, Pax6 heterozygous, and Hsf4 homozygous lenses identified multiple genes co-regulated by Brg1, Hsf4 and Pax6. Among them DNase IIb, a key enzyme required for lens fiber cell denucleation, was found downregulated in each of the Pax6, Brg1 and Hsf4 model systems. Lens-specific deletion of Brg1 using conditional gene targeting demonstrated that Brg1 was required for lens fiber cell differentiation and indirectly for retinal development but was not essential for lens lineage formation. Keywords: Differential mRNA Expression Three biological replicate experiments were performed with HSF null and wildtype lenses.
2010-12-01 | E-GEOD-22362 | biostudies-arrayexpress
Project description:Differential expression of HSF4 in null newborn mouse and wildtype lenses was examined to identify putative downstream targets of HSF4. To examine roles of Brg1 in mouse lens development, a dnBrg1 transgenic construct was expressed using the lens-specific aA-crystallin promoter in postmitotic lens fiber cells. Morphological studies revealed abnormal lens fiber cell differentiation in transgenic lenses resulting in cataract. Electron microscopic studies showed abnormal lens suture formation and incomplete karyolysis (denucleation) of lens fiber cells. To identify genes regulated by Brg1, RNA expression profiling was performed in E15.5 embryonic wild type and dnBrg1 transgenic lenses. In addition, comparisons between differentially expressed genes in dnBrg1 transgenic, Pax6 heterozygous, and Hsf4 homozygous lenses identified multiple genes co-regulated by Brg1, Hsf4 and Pax6. Among them DNase IIb, a key enzyme required for lens fiber cell denucleation, was found downregulated in each of the Pax6, Brg1 and Hsf4 model systems. Lens-specific deletion of Brg1 using conditional gene targeting demonstrated that Brg1 was required for lens fiber cell differentiation and indirectly for retinal development but was not essential for lens lineage formation. Keywords: Differential mRNA Expression
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Project description:Microarray Analyses of Newborn Mouse lens lacking HSF4. Hsf4 is essential for lens development. Newborn Mouse lens expression pattern of HSF4-/- and wildtype.
2009-08-11 | E-GEOD-12415 | biostudies-arrayexpress
Project description:E12.5 mouse lens epithelium and fiber cells were collected using Leica LMD 6000 Laser microdissection system. Total RNA was isolated from epithelium and fiber cells using Qiagen RNeasy kit
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Project description:Microarray Analyses of Newborn Mouse lens lacking HSF4. Hsf4 is essential for lens development.
2009-08-11 | GSE12415 | GEO
Project description:Epithelial cells and differentiated fiber cells represent distinct compartments in the ocular lens. While previous studies have revealed proteins that are preferentially expressed in epithelial vs. fiber cells, a comprehensive proteomics library comparing the molecular composition of epithelial vs. fiber cells is essential for understanding lens formation, function, disease and regenerative potential, and for efficient differentiation of pluripotent stem cells for modeling of lens development and pathology in vitro. To compare protein composition between the lens epithelium and fibers, we employed tandem mass spectrometry (2DLC/ MS) analysis of micro-dissected mouse P0.5 lenses. Functional classifications of the top 525 identified proteins into gene ontology categories by molecular process and subcellular localization, were adapted for lens. Expression levels of both epithelial and fiber proteomes were compared with their temporal and spatial mRNA levels using E14.5, E16.5, E18.5, and P0.5 RNA-Seq data sets. During this developmental time window, multiple complex biosynthetic and catabolic processes generate the molecular and structural foundation for lens transparency. As expected, crystallins showed a high correlation between their mRNA and protein levels. Comprehensive data analysis confirmed and/or predicted roles for transcription factors (TFs), RNA-binding proteins, translational apparatus including ribosomal heterogeneity and initiation factors, microtubules, cytoskeletal and membrane proteins in lens formation and maturation. Our data highlighted many proteins with unknown function in the lens that were preferentially enriched in epithelium or fibers, setting the stage for future studies to further dissect the roles of these proteins in fiber cell differentiation vs. epithelial cell maintenance. In conclusion, the present proteomic datasets established reference mouse lens epithelium and fiber cell proteomes, provided quantitative analyses of protein and RNA-Seq data, and probed the major proteome remodeling required to form the mature lens fiber cells.
2019-03-05 | PXD009639 | Pride
Project description:We adopted an omics (transcriptome, proteome, and metabolome) approach to characterize the differentially regulated molecules in mouse lens fiber cells exposed to cigarette smoke (CS). Eight pregnant female mice (gestation days 19-20) were placed in a smoking chamber that served as a CS-exposed group. The mothers and newborn pups were exposed to CS for five hours/day, five days/week for 110 days. In parallel, mice were kept in normal cages that served as a control group. The ocular lenses were isolated and fiber cells were separated from the lens epithelium under a microscope. The control and CS-exposed groups were maintained in four biological replicates each consisting of a pool of lens fiber cells from four eyes. The eight biological replicates (four control and four CS-exposed) of fiber cells were used for the next-generation-based transcriptome (RNA-Seq) sequencing, mass-spectrometry-based proteome, and metabolome profiling. RNA-Seq analysis identified the expression (≥1.0 FPKM) of 9,590 and 9,531 genes in control and CS-exposed fiber cells, respectively. The analysis identified 348 differentially expressed genes, which included 186 downregulated and 162 upregulated genes in CS-exposed fiber cells. Proteome profiling revealed a total of 2,424 proteins in control and CS-exposed fiber cells. Metabolome profiling identified a total of 280 metabolites, marked with decreased levels of branched-chain amino acids (BCAAs)-related metabolites in CS-exposed fiber cells. In conclusion, we have established a comprehensive omics profile of CS-exposed lens fiber cells. To the best of our knowledge, this is the first report investigating a comprehensive omics profile of CS-exposed fiber cells.
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