Mus musculus
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA325538 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR3662500_1.fastq.gz | Fastqsanger.gz | |||
| SRR3662500_2.fastq.gz | Fastqsanger.gz | |||
| SRR3662510_1.fastq.gz | Fastqsanger.gz | |||
| SRR3662510_2.fastq.gz | Fastqsanger.gz | |||
| SRR3662501_1.fastq.gz | Fastqsanger.gz |
Items per page: 5 1 - 5 of 34 |
Similar Datasets
Project description:Rod photoreceptors are specialized neurons that mediate vision in dim light and are the predominant photoreceptor type in nocturnal mammals. The rods of nocturnal mammals are unique among vertebrate cell types in having an 'inverted' nuclear architecture, with a single dense mass of heterochromatin in the center of the nucleus rather than dispersed clumps at the nuclear periphery. We hypothesized that this unique chromatin organization would correlate with a unique epigenomic landscape as defined by chromatin accessibility. To test this idea, we performed open chromatin profiling (ATAC-seq) on purified mouse rods and their most closely related cell type, cone photoreceptors, which revealed that thousands of loci are selectively closed in rods. Comparison with open-chromatin maps from >60 additional cell types and tissues demonstrated that rods have by far the most closed chromatin architecture. To explore how the unique epigenomic landscape of rods is controlled, we profiled photoreceptors purified from mice lacking the rod master regulator Nrl. We find that the open-chromatin profile of Nrl-/- photoreceptors is nearly indistinguishable from that of native cones, indicating that Nrl is necessary to achieve selective chromatin closure in rods. Finally, we identified distinct enrichments of transcription factor binding sites in rods and cones, suggesting specific mechanisms by which rods and cones encode cell type-specific information in regulatory DNA. Taken together, these data provide new insight into the development and maintenance of photoreceptor identity, and highlight rods as an attractive system for studying the relationship between nuclear organization and local changes in chromatin accessibility.
2017-02-09 | GSE83312 | GEO
Project description:PURPOSE: To provide a detailed gene expression profile of the normal postnatal mouse cornea. METHODS: Serial analysis of gene expression (SAGE) was performed on postnatal day (PN)9 and adult mouse (6 week) total corneas. The expression of selected genes was analyzed by in situ hybridization. RESULTS: A total of 64,272 PN9 and 62,206 adult tags were sequenced. Mouse corneal transcriptomes are composed of at least 19,544 and 18,509 unique mRNAs, respectively. One third of the unique tags were expressed at both stages, whereas a third was identified exclusively in PN9 or adult corneas. Three hundred thirty-four PN9 and 339 adult tags were enriched more than fivefold over other published nonocular libraries. Abundant transcripts were associated with metabolic functions, redox activities, and barrier integrity. Three members of the Ly-6/uPAR family whose functions are unknown in the cornea constitute more than 1% of the total mRNA. Aquaporin 5, epithelial membrane protein and glutathione-S-transferase (GST) omega-1, and GST alpha-4 mRNAs were preferentially expressed in distinct corneal epithelial layers, providing new markers for stratification. More than 200 tags were differentially expressed, of which 25 mediate transcription. CONCLUSIONS: In addition to providing a detailed profile of expressed genes in the PN9 and mature mouse cornea, the present SAGE data demonstrate dynamic changes in gene expression after eye opening and provide new probes for exploring corneal epithelial cell stratification, development, and function and for exploring the intricate relationship between programmed and environmentally induced gene expression in the cornea. Keywords: other
2004-01-02 | GSE887 | GEO
Project description:Both rod and cone photoreceptors are critical for mammalian vision yet they have important functional differences. In this study, we investigate patterns of DNA methylation and chromatin accessibility in mouse rods and cones. Unexpectedly, we find that a substantial fraction of hypo-methylated regions in the rod methylome are in inaccessible chromatin. These regions show marks of active regulatory regions earlier in neuronal development and could remain undermethylated in adult rods due to their highly compact chromatin. We further identify rod- and cone-enriched regions of accessible chromatin that correspond with cell type-specificity of nearby photoreceptor gene expression. We predict novel DNA signatures of rod and cone specificity and show that NR2E3 function is necessary for rods to gain their complete ensemble of epigenomic features. Taken together, our data capture the epigenomic landscapes of retinal rods and cones, including differences relevant to chromatin structure and photoreceptor biology.
2016-03-07 | GSE72550 | GEO
Project description:Single-nucleus RNA sequencing (snRNA-seq) was used to profile the transcriptome of 5,264 nuclei in mouse adult testis. This dataset includes two samples from two different individuals. This dataset is part of a larger evolutionary study of adult testis at the single-nucleus level (97,521 single-nuclei in total) across mammals including 10 representatives of the three main mammalian lineages: human, chimpanzee, bonobo, gorilla, gibbon, rhesus macaque, marmoset, mouse (placental mammals); grey short-tailed opossum (marsupials); and platypus (egg-laying monotremes). Corresponding data were generated for a bird (red junglefowl, the progenitor of domestic chicken), to be used as an evolutionary outgroup.
2021-11-08 | E-MTAB-11071 | biostudies-arrayexpress
Project description:Vertebrate ancestors had only cone-like photoreceptors. The duplex retina evolved in jawless vertebrates with the advent of highly photosensitive rod-like photoreceptors. Despite cones being the arbiters of high-resolution color vision, rods emerged as the dominant photoreceptor in mammals during a nocturnal phase early in their evolution. We investigated the evolutionary and developmental origins of rods in two divergent vertebrate retinae. In mice, we discovered genetic and epigenetic vestiges of short wavelength cones in developing rods and cell lineage tracing validated the genesis of rods from S-cones. Curiously, rods did not derive from S-cones in zebrafish. Our study illuminates several questions regarding the evolution of duplex retina and supports the hypothesis that, in mammals, the S-cone lineage was recruited via the Maf-family transcription factor NRL to augment rod photoreceptors. We propose that this developmental mechanism allowed the adaptive exploitation of scotopic niches during the nocturnal bottleneck early in mammalian evolution.
2016-06-21 | GSE81953 | GEO
Project description:The exclusive expression of single sensory receptors in individual neurons (the ‘one-neuron-one receptor’ rule) is essential for vision and other sensory systems. Here, we show that the transcriptional corepressor Samd7 enforces this rule in vertebrate red cones and acts in other photoreceptor types to maintain cell identity. In the zebrafish samd7-/- retina, red cones are transformed to hybrid red/UV-sensitive cones, green cones are transfated to blue cones, and the number of rods is greatly reduced. In the mouse Samd7-/- retina, dorsal M-cones are transformed to hybrid M/S-cones—analogous to the transformation of red to red/UV cones that occurs in zebrafish—and rods aberrantly express cone genes including S-opsin. Altogether, Samd7 acts to repress short-wavelength cone gene expression in long-wavelength-sensitive cones, thereby sustaining the mutually exclusive patterns of opsin expression and cone identity required for color vision.
2024-06-21 | GSE269667 | GEO
Project description:The exclusive expression of single sensory receptors in individual neurons (the ‘one-neuron-one receptor’ rule) is essential for vision and other sensory systems. Here, we show that the transcriptional corepressor Samd7 enforces this rule in vertebrate red cones and acts in other photoreceptor types to maintain cell identity. In the zebrafish samd7-/- retina, red cones are transformed to hybrid red/UV-sensitive cones, green cones are transfated to blue cones, and the number of rods is greatly reduced. In the mouse Samd7-/- retina, dorsal M-cones are transformed to hybrid M/S-cones—analogous to the transformation of red to red/UV cones that occurs in zebrafish—and rods aberrantly express cone genes including S-opsin. Altogether, Samd7 acts to repress short-wavelength cone gene expression in long-wavelength-sensitive cones, thereby sustaining the mutually exclusive patterns of opsin expression and cone identity required for color vision.
2024-06-21 | GSE249751 | GEO
Project description:The exclusive expression of single sensory receptors in individual neurons (the ‘one-neuron-one receptor’ rule) is essential for vision and other sensory systems. Here, we show that the transcriptional corepressor Samd7 enforces this rule in vertebrate red cones and acts in other photoreceptor types to maintain cell identity. In the zebrafish samd7-/- retina, red cones are transformed to hybrid red/UV-sensitive cones, green cones are transfated to blue cones, and the number of rods is greatly reduced. In the mouse Samd7-/- retina, dorsal M-cones are transformed to hybrid M/S-cones—analogous to the transformation of red to red/UV cones that occurs in zebrafish—and rods aberrantly express cone genes including S-opsin. Altogether, Samd7 acts to repress short-wavelength cone gene expression in long-wavelength-sensitive cones, thereby sustaining the mutually exclusive patterns of opsin expression and cone identity required for color vision.
2024-06-21 | GSE249755 | GEO
Project description:The exclusive expression of single sensory receptors in individual neurons (the ‘one-neuron-one receptor’ rule) is essential for vision and other sensory systems. Here, we show that the transcriptional corepressor Samd7 enforces this rule in vertebrate red cones and acts in other photoreceptor types to maintain cell identity. In the zebrafish samd7-/- retina, red cones are transformed to hybrid red/UV-sensitive cones, green cones are transfated to blue cones, and the number of rods is greatly reduced. In the mouse Samd7-/- retina, dorsal M-cones are transformed to hybrid M/S-cones—analogous to the transformation of red to red/UV cones that occurs in zebrafish—and rods aberrantly express cone genes including S-opsin. Altogether, Samd7 acts to repress short-wavelength cone gene expression in long-wavelength-sensitive cones, thereby sustaining the mutually exclusive patterns of opsin expression and cone identity required for color vision.
2024-06-21 | GSE249754 | GEO