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Decompaction and recompaction of mouse preimplantation embryos

✍ Scribed by Skrzecz, Iwona ;Karasiewicz, Jolanta

Publisher
Springer-Verlag
Year
1987
Tongue
English
Weight
304 KB
Volume
196
Category
Article
ISSN
1432-041X

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✦ Synopsis

Early (non-compacted)

and late (compacted) 8-cell embryos were observed after few hours of culture in vitro. The former embryos underwent compaction and the latter embryos were found decompacted. Cell counting suggested that decompaction preceded fourth cleavage division of any blastomere and lasted until the blastomeres divided.

About one third of mouse morulae, which had about twenty cells, were found non-compacted upon obtaining from females. After few hours of culture in vitro these embryos underwent recompaction and cavitation. Increasing the contributions of mitosis-arrested and cytokinesisarrested cells within the morulae by culture with nocodazole and cytochalasin B respectively, did not delay recompaction.

The data show that periods of decompaction and recompaction alternate in preimplantation development.

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