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Gene expression in Xenopus laevis embryogenesis

ABSTRACT: Analysis of whole body of unfertilized eggs and two-cell stage, 16-cell stage, stage 8, stage 9, stage 10.5, stage 12, stage 15, stage 20, stage 25, stage 30, stage 35 and stage 40 embryos. Results provide insight into the global molecular changes in Xenopus embryogenesis.

ORGANISM(S): Xenopus laevis

PROVIDER: GSE40620 | GEO | 2015/09/05

SECONDARY ACCESSION(S): PRJNA174405

REPOSITORIES: GEO

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Gene expression in Xenopus laevis embryogenesis

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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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