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Spatio-temporal mRNA dynamics in the early zebrafish embryo

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Item Type:Preprint
Title:Spatio-temporal mRNA dynamics in the early zebrafish embryo
Creators Name:Holler, K. and Neuschulz, A. and Drewe-Boß, P. and Mintcheva, J. and Spanjaard, B. and Arsiè, R. and Ohler, U. and Landthaler, M. and Junker, J.P.
Abstract:Early stages of embryogenesis depend heavily on subcellular localization and transport of maternally deposited mRNA. However, systematic analysis of these processes is currently hindered by a lack of spatio-temporal information in single-cell RNA sequencing. Here, we combined spatially-resolved transcriptomics and single-cell RNA labeling to study the spatio-temporal dynamics of the transcriptome during the first few hours of zebrafish development. We measured spatial localization of mRNA molecules with sub-single-cell resolution at the one-cell stage, which allowed us to identify a class of mRNAs that are specifically localized at an extraembryonic position, the vegetal pole. Furthermore, we established a method for high-throughput single-cell RNA labeling in early zebrafish embryos, which enabled us to follow the fate of individual maternal transcripts until gastrulation. This approach revealed that many localized transcripts are specifically transported to the primordial germ cells. Finally, we acquired spatial transcriptomes of two xenopus species, and we compared evolutionary conservation of localized genes as well as enriched sequence motifs. In summary, we established sub-single-cell spatial transcriptomics and single-cell RNA labeling to reveal principles of mRNA localization in early vertebrate development.
Keywords:RNA Localization, Spatially-Resolved Transcriptomics, RNA Labeling, Early Development, Gastrulation, Maternal Factors, Animals, Zebrafish
Publisher:Cold Spring Harbor Laboratory Press
Article Number:
Date:20 November 2020
Official Publication:https://doi.org/10.1101/2020.11.19.389809
Related to:
https://edoc.mdc-berlin.de/20289/Final version

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