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Reversible developmental arrest in the embryo of the zebrafish,Brachydanio rerio

✍ Scribed by Laale, Hans W. ;McCallion, David J.

Publisher: John Wiley and Sons
Year: 1968
Tongue: English
Weight: 978 KB
Volume: 167
Category: Article
ISSN: 0022-104X
DOI: 10.1002/jez.1401670108

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✦ Synopsis

Zebrafish embryos at six developmental stages were exposed to the supernatant of homogenates of zebrafish embryos, 5-day chick embryos and 9mm frog larvae. Extracts of embryos bring about developmental arrest of the zebrafish embryo at stages 17-18. The effect is reversible. Arrested embryos returned to buffered water recover and develop normally to hatching, delayed by a time equal to the time of exposure to extracts. Two fractions of the embryo extract are produced by 6-75 Sephadex gel filtration. The inhibitory effect is limited to one of these fractions. The inhibitory factor in embryo extract has characteristics compatible with those of nucleases but the effect on embryos is unlike that of ribonuclease.

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