Effects of hypergravity on oocyte maturation in Xenopus laevis

• Tazawa Ichiro

  Institute for Amphibian Biology, Graduate School of Science, Hiroshima University, Higashihiroshima 739-8526, Japan

• Kashiwagi Akihiko

  Institute for Amphibian Biology, Graduate School of Science, Hiroshima University, Higashihiroshima 739-8526, Japan

• Kashiwagi Keiko

  Institute for Amphibian Biology, Graduate School of Science, Hiroshima University, Higashihiroshima 739-8526, Japan

• Furuno Nobuaki

  Institute for Amphibian Biology, Graduate School of Science, Hiroshima University, Higashihiroshima 739-8526, Japan

Abstract

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 Xenopus. No differences were found between 2G and 5G 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.

Journal

• Biological Sciences in Space

  Biological Sciences in Space 19 (4), 242-244, 2005

  Japanese Society for Biological Sciences in Space

Keywords

• white spot

Details

• CRID: 1390282679408585728
• NII Article ID: 10018083577
• NII Book ID: AN10164806
• DOI: 10.2187/bss.19.242
• ISSN: 1349967X
• ISSN: 09149201
• NDL BIB ID: 7982378
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7982378
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed