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Xenopus laevis

ABSTRACT: RNA-seq of regenerating tails of x25789 knocked-down tadpoles

PROVIDER: PRJDB14789 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	DRR419581_1.fastq.gz	Fastqsanger.gz
	DRR419581_2.fastq.gz	Fastqsanger.gz
	DRR419582_1.fastq.gz	Fastqsanger.gz
	DRR419582_2.fastq.gz	Fastqsanger.gz
	DRR419583_1.fastq.gz	Fastqsanger.gz

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Gene expression in the tail tissue of tadpoles [Rana pirica] by larvae salamander or dragon fly

Project description:Tadpoles of the anuran species Rana pirica can undergo predator-specific morphological responses. Exposure to a predation threat by larvae of the salamander Hynobius retardatus results in formation of a bulgy body (bulgy morph) with a higher tail. Whereas, dragon fly also induced higher tail tadpole. The tadpoles revert to a normal phenotype upon removal of the larval salamander or dragon fly threat. The objective of the present study was to use Affymetrix Xenopus Genechip to profile gene expression in the tail tissue by different predation threat. Tadpoles of Rana pirica treated with larvae salamander for 8days (S1, S2, S3) or dragon fly for 8days (Y1,Y2, Y3) were analyzed with triplicate. Removal experiments were also treated with predators for 4days and then removed predators from tadpoles (-S1,-S2, -S3) or (-Y1,-Y2,-Y3). Controls were cultured for 8days without predators (C2, C3). Tails from tadpoles after 8days of each treatment were dissected for RNA extraction and gene expression analysis using Affymetrix Xenopus Genechip arrays.

2016-10-24 | E-GEOD-33250 | biostudies-arrayexpress

Comparison of regenerating and non regenerating transgenic stage 52 Xenopus hind limbs

Project description:Epimorphic regeneration is the process by which complete regeneration of a complex structure such as a limb occurs through production of a proliferating blastema. This type of regeneration is rare among vertebrates but does occur in the African clawed frog Xenopus laevis, traditionally a model organism for the study of early development. Xenopus tadpoles can regenerate tails, limb buds and the lens of the eye, although the ability of the latter two organs to regenerate diminishes with advancing developmental stage. Using a heat shock inducible transgene that remains silent unless activated, we have established a stable line of transgenic Xenopus in which the BMP inhibitor Noggin can be over-expressed at any time during development. We have previously shown that activation of this transgene blocks regeneration of the tail and limb of Xenopus tadpoles. In the current study, we have taken advantage of this transgenic line to directly compare gene expression in same stage regenerating vs. non-regenerating hind limb buds. Using Affymetrix gene chip analysis, we have identified genes whose expression levels are linked to regenerative success. These include the BMP inhibitor Gremlin and the stress protein Hsp60 (no blastema in zebrafish). Analysis of overrepresented Gene Ontology functional groupings suggests that successful regeneration in the Xenopus hind limb depends on induction of stress response pathways. Furthermore, as expected, genes involved in embryonic development and growth are also significantly over-represented in regenerating early hind limb buds. Keywords: Differential expression, regeneration

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