GEO DataSets

(Submitter supplied) Photoreceptor loss is a leading cause of blindness, but mechanisms underlying photoreceptor degeneration are not well understood. Treatment strategies would benefit from an improved understanding of gene-expression patterns directing photoreceptor development, as many genes are implicated in both development and degeneration. Neural retina leucine zipper (NRL) is critical for rod photoreceptor genesis and degeneration, with NRL mutations known to cause enhanced S-cone syndrome and retinitis pigmentosa. more...

Organism:

Homo sapiens

Type:

Expression profiling by high throughput sequencing

Platform:

GPL16791

17 Samples

Download data: TXT

(Submitter supplied) Cone photoreceptors are the primary initiator of visual transduction in the human retina. Dysfunction or death of rod photoreceptors precedes cone loss in many retinal and macular degenerative diseases, suggesting a rod-dependent trophic support for cone survival. Rod differentiation and homeostasis are dependent on the basic motif leucine zipper transcription factor NRL. The loss of Nrl in mice (Nrl-/-) results in a retina with predominantly S-opsin containing cones that exhibit molecular and functional characteristics of WT cones. more...

Organism:

Mus musculus

Type:

Expression profiling by array

Platform:

GPL6193

20 Samples

Download data: CEL

(Submitter supplied) This SuperSeries is composed of the SubSeries listed below.

Organism:

Danio rerio

Type:

Expression profiling by high throughput sequencing

Platform:

GPL18413

6 Samples

Download data: TAR

(Submitter supplied) NRL (Neural retina leucine zipper) is a key regulator of the fate determination and gene expression of rod photoreceptors in the retina of many vertebrates. In this study, we observed a unique retinal phenotype in the nrl knockout zebrafish model characterized by reduced rods with shortened outer segments and gradually increased green-cones in adulthood. By tracing and comparing the developmental processes of WT and nrl knockout rods, we found there might be two waves of rod genesis distinguished as nrl-dependent and independent with different starting times. more...

Organism:

Danio rerio

Type:

Expression profiling by high throughput sequencing

Platform:

GPL18413

2 Samples

Download data: TAR

(Submitter supplied) NRL (Neural retina leucine zipper) is a key regulator of the fate determination and gene expression of rod photoreceptors in the retina of many vertebrates. In this study, we observed a unique retinal phenotype in the nrl knockout zebrafish model characterized by reduced rods with shortened outer segments and gradually increased green-cones in adulthood. By tracing and comparing the developmental processes of WT and nrl knockout rods, we found there might be two waves of rod genesis distinguished as nrl-dependent and independent with different starting times. more...

Organism:

Danio rerio

Type:

Expression profiling by high throughput sequencing

Platform:

GPL18413

4 Samples

Download data: TXT

(Submitter supplied) The rod photoreceptor-specific neural retina leucine zipper protein Nrl is essential for rod differentiation and plays a critical role in regulating gene expression. In the mouse retina, rods account for 97% of the photoreceptors; however, in the absence of Nrl (Nrl-/-), no rods are present and a concomitant increase in cones is observed. Using mouse GeneChips (Affymetrix), we have generated expression profiles of the wild-type and Nrl-/- retina at three time-points representing distinct stages of photoreceptor differentiation. more...

Organism:

Mus musculus

Type:

Expression profiling by array

Dataset:

GDS2936

Platform:

GPL81

24 Samples

Download data: CEL

Analysis of retinas of mutants lacking the rod photoreceptor-specific neural retina leucine zipper protein (Nrl), at up to 2 months of age. In the absence of Nrl, rods are missing and cones increase in number. Results provide insight into the differences between the two photoreceptor subtypes.

Organism:

Mus musculus

Type:

Expression profiling by array, count, 3 age, 2 genotype/variation sets

Platform:

GPL81

Series:

GSE8972

24 Samples

Download data: CEL

(Submitter supplied) This SuperSeries is composed of the SubSeries listed below.

Organism:

Mus musculus

Type:

Expression profiling by high throughput sequencing; Genome binding/occupancy profiling by high throughput sequencing

Platform:

GPL17021

21 Samples

Download data: BW

(Submitter supplied) The basic motif-leucine zipper (bZIP) transcription factor NRL determines rod photoreceptor cell fate during retinal development, and its loss leads to cone-only retina in mice. NRL works synergistically with homeodomain protein Cone-Rod Homeobox and other regulatory factors to control the transcription of most genes associated with rod morphogenesis and functional maturation, which span over a period of several weeks in the mammalian retina. more...

Organism:

Mus musculus

Type:

Genome binding/occupancy profiling by high throughput sequencing

Platform:

GPL17021

15 Samples

Download data: BW, TSV

(Submitter supplied) The basic motif-leucine zipper (bZIP) transcription factor NRL determines rod photoreceptor cell fate during retinal development, and its loss leads to cone-only retina in mice. NRL works synergistically with homeodomain protein Cone-Rod Homeobox and other regulatory factors to control the transcription of most genes associated with rod morphogenesis and functional maturation, which span over a period of several weeks in the mammalian retina. more...

Organism:

Mus musculus

Type:

Expression profiling by high throughput sequencing

Platform:

GPL17021

6 Samples

Download data: TSV

(Submitter supplied) Purpose: To investigate the gene regulatory networks during photoreceptor differentiation. Special aims: To generate gene expression profiles of purified photoreceptors at distinct developmental stages and from different genetic backgrounds. Background: Rod photoreceptor genesis spans a broad temporal window during retinal development. It starts as early as E12.5 and peaks at P0-P2. At E16.5, there are some early born rods but the peak of rod genesis does not occur. more...

Organism:

Mus musculus

Type:

Expression profiling by array

Dataset:

GDS1693

Platform:

GPL1261

39 Samples

Download data: CEL, TXT

Analysis of photoreceptors (PRs) from wild type and Nrl deficient retinas at various developmental stages. PRs isolated based on transgene GFP expression from an Nrl promoter. Nrl ablation leads to cones at the expense of rods. Results provide insight into the regulation of PR development.

Organism:

Mus musculus

Type:

Expression profiling by array, count, 5 development stage, 2 genotype/variation sets

Platform:

GPL1261

Series:

GSE4051

39 Samples

Download data: CEL

(Submitter supplied) The initial aim of this work was to understand the pathophysiology of Enhanced S-cone Syndrome (ESCS) that leads to retinal degeneration. Although ESCS was identified in humans decades ago and since then the causative genes have been elucidated, our understanding of the accompanying retinal degeneration is still poorly understood. Knockout of the Nrl transcription factor in mice produces a retina overpopulated with S-cone like photoreceptors along with absence of rod photoreceptors and recapitulates many of the phenotypic features seen in human ESCS patients. more...

Organism:

Mus musculus

Type:

Expression profiling by high throughput sequencing

Platform:

GPL11002

4 Samples

Download data: TXT

(Submitter supplied) To define molecular mechanisms underlying rod and cone differentiation, we generated H9 human embryonic stem cell line carrying a GFP reporter that is controlled by the promoter of cone-rod homeobox (CRX) gene, the first known marker of post-mitotic photoreceptor precursors. CRXp-GFP reporter in H9 line replicates endogenous CRX expression when induced to form self-organizing 3-D retina-like tissue. more...

Organism:

Homo sapiens

Type:

Expression profiling by high throughput sequencing

Platform:

GPL10999

23 Samples

Download data: CSV, XLS

(Submitter supplied) Mutations in RP2 lead to a severe form of X-linked retinitis pigmentosa (XLRP). RP2 functions as a GTPase activating protein (GAP) for the small GTPase ARL3, which is essential for cilia function and for photoreceptor development and maintenance. The mechanisms of RP2 associated retinal degeneration in humans are poorly understood, and genetically engineered animal models of RP2 XLRP present with differing retinal phenotypes and slow degeneration suggesting potential species differences. more...

Organism:

Homo sapiens

Type:

Expression profiling by high throughput sequencing

Platform:

GPL11154

8 Samples

Download data: TXT

(Submitter supplied) Death of photoreceptors and/or Retinal Pigment Epithelium (RPE) cells is a common cause of age related and inherited retinal dystrophies, thus their replenishment from renewable stem cell sources is a well sought therapeutic goal. Human pluripotent stem cells provide a useful cell source in view of their limitless self-renewal capacity and potential to differentiate into all key retinal cell types either in isolation or as part of three dimensional retinal organoids. more...

Organism:

Homo sapiens

Type:

Expression profiling by high throughput sequencing

Platform:

GPL18573

96 Samples

Download data: TXT

(Submitter supplied) Gene regulatory networks (GRNs) guiding differentiation of cell types and cell assemblies in the nervous system are poorly understood because of inherent complexities and interdependence of signaling pathways. Here, we report transcriptome dynamics of differentiating rod photoreceptors in the mammalian retina. Given that the transcription factor NRL determines rod cell fate, we performed expression profiling of developing NRL-positive (rods) and NRL-negative (S-cone-like) mouse photoreceptors. more...

Organism:

Mus musculus

Type:

Expression profiling by array

Platform:

GPL6096

28 Samples

Download data: CEL

(Submitter supplied) Rod and cone photoreceptors in mammalian retina are generated from common pool(s) of neuroepithelial progenitors. NRL, CRX and NR2E3 are key transcriptional regulators that control photoreceptor differentiation. Mutations in NR2E3, a rod-specific orphan nuclear receptor, lead to loss of rods, increased density of S-cones, and supernormal S-cone-mediated vision in humans. To better understand its in vivo function, NR2E3 was expressed ectopically in the Nrl-/- retina, where post-mitotic precursors fated to be rods develop into functional S-cones similar to the human NR2E3 disease. more...

Organism:

Mus musculus

Type:

Expression profiling by array

Dataset:

GDS2455

Platform:

GPL1261

8 Samples

Download data: CEL

Analysis of 4 week-old neural retinal leucine zipper (NRL) null retinas expressing photoreceptor-specific nuclear receptor (NR2E3) from the cone-rod homeobox (CRX) promoter. NRL, NR2E3, and CRX control photoreceptor differentiation. Results provide insight into the molecular function of NR2E3.

Organism:

Mus musculus

Type:

Expression profiling by array, transformed count, 2 strain sets

Platform:

GPL1261

Series:

GSE5338

8 Samples

Download data: CEL

(Submitter supplied) RNA Polymerase-II active regions were mapped comparing mouse neural retina tissue at age P25 and P2 to find novel gene activation predictions during maturation of photoreceptors. Over 800 predictions of increased activation were novel compared to previous mRNA expression array studies.

Organism:

Mus musculus

Type:

Genome binding/occupancy profiling by genome tiling array

Platform:

GPL5811

3 Samples

Download data: BED, CEL