Variability of an early developmental cell population underlies stochastic laterality defects
Item Type: | Article |
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Title: | Variability of an early developmental cell population underlies stochastic laterality defects |
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Creators Name: | Moreno-Ayala, R. and Olivares-Chauvet, P. and Schäfer, R. and Junker, J.P. |
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Abstract: | Embryonic development seemingly proceeds with almost perfect precision. However, it is largely unknown how much underlying microscopic variability is compatible with normal development. Here, we quantify embryo-to-embryo variability in vertebrate development by studying cell number variation in the zebrafish endoderm. We notice that the size of a sub-population of the endoderm, the dorsal forerunner cells (DFCs, which later form the left-right organizer), exhibits significantly more embryo-to-embryo variation than the rest of the endoderm. We find that, with incubation of the embryos at elevated temperature, the frequency of left-right laterality defects is increased drastically in embryos with a low number of DFCs. Furthermore, we observe that these fluctuations have a large stochastic component among fish of the same genetic background. Hence, a stochastic variation in early development leads to a remarkably strong macroscopic phenotype. These fluctuations appear to be associated with maternal effects in the specification of the DFCs. |
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Keywords: | Early Development, Phenotypic Variability, Dorsal Forerunner Cells, Left-Right Asymmetry, Heart Laterality, Maternal Effects, Animals, Zebrafish |
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Source: | Cell Reports |
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ISSN: | 2211-1247 |
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Publisher: | Cell Press / Elsevier |
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Volume: | 34 |
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Number: | 2 |
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Page Range: | 108606 |
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Date: | 12 January 2021 |
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Official Publication: | https://doi.org/10.1016/j.celrep.2020.108606 |
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PubMed: | View item in PubMed |
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Related to: | |
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