Effects of hypergravity on oocyte maturation in Xenopus laevis
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Developing oocytes arrest at the prophase of meiosis I, while the hormone progesterone restarts the process, leading to full maturation as fertile eggs. In this study we investigated the effects of hypergravity on this phase of maturation using oocytes of <i>Xenopus</i>. No differences were found between 2<i>G</i> and 5<i>G</i> treated groups and untreated controls regarding time to resumption of maturation, as judged by the appearance of a white spot in the animal hemisphere. However the white spot itself was larger and brighter in treated oocytes at time of appearance, and became even more pronounced as maturation proceeded. These findings suggest that although hypergravity does not affect the resumption of maturation, it might adversely affect the subsequent process and final results.
- Biol. Sci. Space
Biol. Sci. Space 19(4), 242-244, 2005-12
Japanese Society for Biological Sciences in Space