| Autor: |
Chen Q; School of Systems Science, Beijing Normal University, Beijing, China., Di Z; School of Systems Science, Beijing Normal University, Beijing, China., García Roger EM; Institut Cavanilles de Biodiversitat i Biologia Evolutiva, University of València, València, Spain. eduardo.garcia@uv.es., Li H; School of Systems Science, Beijing Normal University, Beijing, China., Richmond P; School of Physics, Trinity College Dublin, Dublin, Ireland., Roehner BM; Institute for Theoretical and High Energy Physics (LPTHE), Pierre and Marie Curie Campus, Sorbonne University, National Center for Scientific Research (CNRS), Paris, France. |
| Jazyk: |
angličtina |
| Zdroj: |
Journal of biological physics [J Biol Phys] 2020 Sep; Vol. 46 (3), pp. 233-251. Date of Electronic Publication: 2020 Aug 17. |
| DOI: |
10.1007/s10867-020-09555-4 |
| Abstrakt: |
Embryonic development is of great importance because it determines congenital anomalies and influences their severity. However, little is known about the actual probabilities of success or failure and about the nature of early embryonic defects. Here, we propose that the analysis of embryonic mortality as a function of post-fertilization time provides a simple way to identify major defects. By reviewing the literature, we show that even small initial defects, e.g., spatial cellular asymmetries or irregularities in the timing of development, carry with them lethal effects in subsequent stages of embryogenesis. Although initially motivated by human study, in this contribution, we review the few embryonic mortality data available for farm animals and highlight zebrafish as a particularly suited organism for such a kind of study because embryogenesis can be followed from its very beginning and observed easily thanks to eggshell transparency. In line with the few other farm animals for which data are available, we provide empirical evidence that embryonic mortality in zebrafish has a prominent peak shortly after fertilization. Indeed, we show how subsequent mortality rates decay according to a power law, supporting the role of the early embryonic mortality peak as a screening process rapidly removing defective embryos. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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