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Xenopus laevis

ABSTRACT: The identification of differentially expressed genes between animal and vegetal blastomeres in Xenopus laevis

PROVIDER: PRJNA284242 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR2029780_1.fastq.gz	Fastqsanger.gz
	SRR2029780_2.fastq.gz	Fastqsanger.gz
	SRR2029781_1.fastq.gz	Fastqsanger.gz
	SRR2029781_2.fastq.gz	Fastqsanger.gz
	SRR2029782_1.fastq.gz	Fastqsanger.gz

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Next generation sequencing identifies differentially localized transcripts in Xenopus laevis and Xenopus tropicalis oocytes

Project description:RNA-seq technology was used to identify differentially localized transcripts from Xenopus laevis and Xenopus tropicalis stage VI oocytes. Besides the discovery of a group of novel animally enriched RNAs, this study revealed a surprisingly low conservation of vegetal RNA localization between the two frog species. mRNA profiles of Xenopus laevis and Xenopus tropicalis animal and vegetal oocyte halves were generated by RNA-seq technology. For Xenopus laevis, animal and vegetal oocyte RNA preparations from two different females were generated in duplicates. For Xenopus tropicalis, animal and vegetal oocyte RNA preparations from two different females were analyzed.

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Comparison of animal-blastomeres' RNA content to vegetal-most half of vegetal blastomeres' RNA content at the 8-cell stage of Xenopus laevis embryos to identify animal-enriched transcripts

Project description:In Xenopus laevis, a number of studies identified vegetal factors that specify the germ line, endoderm and dorsal axis, but there are few studies demonstrating roles for animal-enriched maternal mRNAs. Therefore, we carried out a microarray analysis to identify novel maternal transcripts enriched in animal blastomeres. We sought to maximize differences between animal and vegetal samples. To that end, we dissected 8-cell embryos into animal blastomeres and vegetal blastomeres, and further dissected the vegetal blastomeres into vegetal-most halves (VP) and equatorial regions (discarded).

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Project description:To identify asymmetrically localized maternal mRNAs along the animal-vegetal axis in cleavage Xenopus embryos, we isolated animal and vegetal blastomeres at 8-cell stage, extracted the maternal mRNA respectively and analyzed them by RNA-seq technology. We identified 43 maternal transcripts significantly enriched in the vegetal region (FDR<0.05) by R/Bioconductor package DESeq RNAseq of animal and vegetal blastomeres with 2 biological replicates

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Xenopus laevis

Project description:Comparison of animal-blastomeres' RNA content to vegetal-most half of vegetal blastomeres' RNA content at the 8-cell stage of Xenopus laevis embryos to identify animal-enriched transcripts

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Comparison of RNA localization during oogenesis within Acipenser ruthenus and Xenopus laevis [Xenopus laevis]

Project description:In this study we analyzed the spatial and temporal localization of maternal transcripts during oogenesis in Xenopus laevis. The occurrence of transcript asymmetry in X. laevis has been described at a global level only in matured eggs, while the establishment of the asymmetry during oogenesis has been described only for a few transcripts. In this model it was discerned that there exist three pathways (early, intermediate, late) for the establishment of the vegetal gradient, while for the animal gradient not much is known for its production. In this study we assessed the temporal establishment of the transcript localization at a global level for Xenopus laevis. We were able to determine that there are many transcripts that show temporal variability in the establishment of their localization. We observed the previously described early, intermediate (predefined) and also late pathways but found more member transcripts within these groups. We also described, perhaps for the first time, an early, intermediate (predefined) and late pathway for the animal genes as well. Additionally, we showed that some maternal transcripts are dynamic during oogenesis with degradation and de novo production being observed. Our study showed that in additional to spatial orientation to the transcripts, there is a strong temporal factor. The discovery of these new temporal profiles should help to better understand the driving forces during embryogenesis.

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Xenopus laevis

Project description:Xenopus laevis RNA-Seq on animal caps

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