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Gene expression profiles in normal and Otx2-/- early gastrulating mouse embryos

ABSTRACT: We compared gene expression profiles in wild-type and Otx2(-/-) 6.5 days postcoitum embryos by using a serial analysis of gene expression assay adapted to microdissected structures. Among a broader list, the study of six genes found to be differentially expressed allows defining a role for Otx2 in the orchestration of cell movements leading to the adequate organization of the embryo before gastrulation. Keywords: other

ORGANISM(S): Mus musculus

PROVIDER: GSE683 | GEO | 2003/09/25

SECONDARY ACCESSION(S): PRJNA87631

REPOSITORIES: GEO

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Gene expression profiles in normal and Otx2-/- early gastrulating mouse embryos

Project description:We compared gene expression profiles in wild-type and Otx2(-/-) 6.5 days postcoitum embryos by using a serial analysis of gene expression assay adapted to microdissected structures. Among a broader list, the study of six genes found to be differentially expressed allows defining a role for Otx2 in the orchestration of cell movements leading to the adequate organization of the embryo before gastrulation. Keywords: other

2003-09-25 | E-GEOD-683 | biostudies-arrayexpress

Otx2 controls regional patterning within the MGE and regional identity of the septum [ChIP-Seq]

Project description:The Otx2 homeobox transcription factor is essential for gastrulation and early neural development. We generated Otx2 conditional knockout (cKO) mice to investigate its roles in telencephalon development after E9.0. We conducted transcriptional profiling and in situ hybridization to identify genes de-regulated in Otx2 cKO ventral forebrain. In parallel, we used ChIP-seq to identify enhancer elements, OTX2 binding motif, and which de-regulated genes are likely direct targets of Otx2 transcriptional regulation. We found that Otx2 was essential in septum specification; regulation of Fgf signaling in the rostral telencephalon; and medial ganglionic eminence (MGE) patterning, neurogenesis, and oligodendrogenesis. Within the MGE, Otx2 was required for ventral but not dorsal identity; this is the first demonstration of a transcription factor that contributes to regional patterning within the MGE. Microdissected subpallium (septum, MGE, and LGE ) from wildtype E12.5 CD-1 embryos was used in three independentanti-OTX2 ChIP-seq experiments.

2015-06-10 | E-GEOD-69724 | biostudies-arrayexpress

Otx2 controls regional patterning within the MGE and regional identity of the septum [Agilent]

2015-06-03 | GSE69547 | GEO

Otx2 controls regional patterning within the MGE and regional identity of the septum [ChIP-Seq]

2015-06-10 | GSE69724 | GEO

Adult mouse choroid plexus OTX2 Co-IP

Project description:To analyze OTX2 function in adult choroid plexus, we performed several OTX2 co-immunoprecipitation (co-IP) experiments with mass spectrometry analysis to identify potential protein partners. We previously discovered that OTX2 protein also accumulates non-cell autonomously in subventricular zone (SVZ) and rostral migratory stream (RMS) astrocytes and in visual cortex (VCx) parvalbumin cells. The identification of alternate protein partners in cell-autonomous and non-cell-autonomous contexts would suggest OTX2 takes on specific roles after transferring between cells. In order to test this hypothesis, and to reinforce choroid plexus analysis, we also performed OTX2 co-IP on lysates from adult mouse SVZ, RMS and VCx.

2021-08-23 | PXD021244 | Pride

O-GlcNAcylation and chaperonin CCT5 protect OTX2 from aggregation in medulloblastoma cellsO-GlcNAcylation andanalysis of OTX2 O-GlcNac sites and dependent interactions

Project description:In this study, we demonstrated that OTX2 was transcriptionally and post-transcriptionally regulated by O-GlcNAcylation. We describe the modes of degradation of this essential homeobox protein involving both the proteasome and macroautophagy. While the proteasome remains the canonical degradation pathway, we demonstrated that OTX2 forms oligomers and/or aggregates that are resistant to proteasomal degradation and require macroautophagy. Furthermore, elevated cellular concentration of OTX2 promoted aggregation, OTX2 could either interact with the chaperonin CCT5 or be O-GlcNAcylated at the key residues (S1135/S136/T137) to prevent its oligomerization, suggesting a protective role of O-GlcNAcylation in OTX2 turnover.

2024-01-22 | PXD040353 | Pride

Photoreceptor Otx2 cKO

Project description:Homeobox transcription factor Otx2 is a key actor in retinal development, but in adult stage its function is not yet elucidated. In order to elucidate it we induced Otx2 KO specifically in MATURE PHOTORECEPTORS. Here, we report RNA seq data, that were produced in order to investigate on the effect of Otx2 ablation on its regulatoy network. Post natal day 30 (P30) is the time of KO induction. KO mice were collected 2, 4 and 8 days after Otx2 ablation.

2019-09-28 | GSE138097 | GEO

Expression profiling of the Otx2 CKO retina

Project description:In the vertebrate retina, the Otx2 transcription factor plays a crucial role in the cell fate determination of both rod and cone photoreceptors. Otx2 conditional knockout (CKO) mice exhibited a total absence of rods and cones in the retina due to their cell fate conversion to amacrine-like cells. In order to investigate the entire transcriptome regulated by Otx2 in the developing retina, we performed microarray analysis on the Otx2 CKO retina. In order to clarify the molecular role of Otx2 in transcriptional regulation during development, we investigated the expression profile of the Otx2 CKO retina compared with that of the control retina with the genotype Otx2flox/flox;Crx-cre- using microarrays at two time points, P1 and P12.

2011-05-18 | E-GEOD-21900 | biostudies-arrayexpress

Photoreceptor Otx2 cKO

Project description:Photoreceptor Otx2 cKO

| PRJNA574601 | ENA

The transcription factor Otx2 regulates choroid plexus development and function

Project description:The choroid plexuses (ChPs) are the main regulators of cerebrospinal fluid (CSF) composition and thereby also control the composition of a principal source of signaling molecules that is in direct contact with neural stem cells in the developing brain. The regulators of ChP development mediating the acquisition of a fate that differs from the neighboring neuroepithelial cells are poorly understood. Here, we demonstrate in mice a crucial role for the transcription factor Otx2 in the development and maintenance of ChP cells. Deletion of Otx2 by the Otx2-CreERT2 driver line at E9 resulted in a lack of all ChPs, whereas deletion by the Gdf7-Cre driver line affected predominately the hindbrain ChP, which was reduced in size, primarily owing to an increase in apoptosis upon Otx2 deletion. Strikingly, Otx2 was still required for the maintenance of hindbrain ChP cells at later stages when Otx2 deletion was induced at E15, demonstrating a central role of Otx2 in ChP development and maintenance. Moreover, the predominant defects in the hindbrain ChP mediated by Gdf7-Cre deletion of Otx2 revealed its key role in regulating early CSF composition, which was altered in protein content, including the levels of Wnt4 and the Wnt modulator Tgm2. Accordingly, proliferation and Wnt signaling levels were increased in the distant cerebral cortex, suggesting a role of the hindbrain ChP in regulating CSF composition, including key signaling molecules. Thus, Otx2 acts as a master regulator of ChP development, thereby influencing one of the principal sources of signaling in the developing brain, the CSF. We performed gene expression microarray analysis of fourth ventricular choroid plexus tissue from Otx2 k.o. mice compared to wildtype mice from the same litters.

2013-02-05 | E-GEOD-27630 | biostudies-arrayexpress

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