Xenopus laevis
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA113487 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:The response of ectodermal explants, neuralized by noggin and treated with cycloheximide, following activation of hormone-inducible zic1 injected into the parent embryos compared to those from beta globin injected embryos as controls, is expected to provide information on the direct targets of the Zic1 transcription factor. Experiment Overall Design: Activation of zic1 in ectodermal explants following inhibition of new protein synthesis allowed the direct targets of zic1 to be identified by comparison with controls. After RNA extraction, purification and checks with PCR with actin primers for any mesoderm contamination samples were prepared for hybridization to Xenopus laevis Affymetrix GeneChip arrays.
2009-07-10 | E-GEOD-12128 | biostudies-arrayexpress
Project description:The response of ectodermal explants, neuralized by noggin and treated with cycloheximide, following activation of hormone-inducible zic1 injected into the parent embryos compared to those from beta globin injected embryos as controls, is expected to provide information on the direct targets of the Zic1 transcription factor.
2009-07-01 | GSE12128 | GEO
Project description:Retinoic acid, acting through RAR/RXR nuclear receptors, is required for neuronal differentiation in Xenopus laevis. Bexarotene, characterised as a pan-RXR agonist, reduces the symptoms of Alzheimer’s disease (AD) in mouse models by clearing amyloid plaque and by promoting neurogenesis. In this paper, we show that RXR-initiated bexarotene signaling generates additional neurons both during normal Xenopus laevis development and in ectodermal explants in which BMP- signaling is inhibited. Differential gene expression between ectodermal explants taken from uninjected and embryos co-injected with mRNA that expresses Noggin, a BMP antagonist, and RXRβ identifies genes mediating change from an epidermal to a neural fate. The explants express genes associated with an anterior neural, but not neuronal fate. The addition of bexarotene to equivalent co-injected explants activates genes that promote neuronal differentiation and posterior character, including genes of the canonical Wnt signaling pathway. Xenopus ectodermal explants therefore provide a simple and efficient tool to identify novel retinoid agonists that promote neuronal differentiation. The genes expressed in response to bexarotene are consistent with a pathway to neuronal differentiation allied to standard retinoid signalling.
2026-06-18 | GSE330857 | GEO
Project description:The Xenopus POU class V transcription factor XOct-25 has been shown to inhibit BMP-dependent epidermal differentiation and promote neural induction in the ectoderm during early embryogenesis. In order to identify genes that act downstream of XOct-25, transcriptional profile of Xenopus ectodermal cells overexpressing XOct-25 was compared with control cells by using a DNA microarray method. Two independent experiments. Each experiment contains ectodermal cells overexpressing XOct-25 and corresponding control cells. Xenopus embryos were injected at the 8-cell stage with mRNA encoding GR-XOct-25, a hormone-inducible version of XOct-25. Explants from stage 9 embryos were treated with or without dexamethazone (DEX) until the sibling embryos reached stage 10.5, when they were used for RNA extraction. The explants cultured without DEX was used as a control sample. biological replicates: Sample name XOct-exp 1, Sample name XOct-exp 2
2012-10-05 | E-GEOD-24562 | biostudies-arrayexpress
Project description:Profiling limb muscle degeneration by inducible dominant negative thyroid hormone receptor transgene over-expression
| PRJNA96467 | ENA
Project description:Pax3 and Zic1 trigger the early neural crest gene regulatory network by the direct activation of multiple key neural crest specifiers [Xenopus_laevis]
| PRJNA232628 | ENA
Project description:Pax3 and Zic1 trigger the early neural crest gene regulatory network by the direct activation of multiple key neural crest specifiers [X_laevis_2]
| PRJNA232629 | ENA
Project description:Targets of Pax3 and Zic1 in neural crest and cranial placode progenitors
| PRJNA283107 | ENA
Project description:The transcription factors Pax3 and Zic1 are among the earliest genes activated at the neural plate border. Pax3 and Zic1 in combination promote neural crest fate, while Zic1 alone regulate cranial placode progenitor formation. We used microarrays to identify the global repertoire of genes activated by these facors individually or in combination to gain insights into the molecular mechanisms underlying cell fate decision at the neural plate border. Xenopus laevis embryos were injected at the 2-cell stage with mRNA encoding Pax3GR and Zic1GR , the hormone-inducible version of Pax3 and Zic1, alone or in combination. At the blastula stage (stage 9), animal cap explants were dissected and cultured for 8 hours in the presence of dexamethasone. A glucocorticoid receptor (GR) mRNA was also injected as negative control.
2015-05-06 | E-GEOD-68546 | biostudies-arrayexpress
Project description:Identification of xLEF1 specific target genes in dorsal marginal zone explants of Xenopus laevis
| PRJNA329472 | ENA