Hiroshima University Graduate School of Science
Hiroshima University Graduate School of Science
Hiroshima University Graduate School of Science
Tokyo Metropolitan Institute of Gerontology
Tottori University School of Life Sciences, Faculty of Medicine
University of Tokushima Dept. of Mathematical and Natural Sci., Faculty of Integrated Arts and Sciences
Japan Aerospace Exploration Agency Institute of Space and Astronautical Science
Hiroshima University Graduate School of Science
出版者
宇宙航空研究開発機構宇宙科学研究本部
出版者（英）
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)
雑誌名
宇宙利用シンポジウム 第23回 平成18年度
雑誌名(英)
Space Utilization Research: Proceedings of the Twenty-third Space Utilization Symposium
ページ
311 - 313
発行年
2007-03
抄録（英）
Full-grown Xenopus oocytes arrest at the prophase of meiosis I. The hormone progesterone induces resumption of the meiotic cell cycle, leading to maturation of the oocyte into a fertilizable egg. We investigated the effect of hypergravity on Xenopus oocyte maturation. At the last meeting, we reported that hypergravity did not affect the initiation of maturation, whereas the progression of maturation was affected regarding the external appearance of the white spot. The present study examines changes in spindle morphology during Xenopus oocyte maturation. Cytological examination showed that spindle formation of meiosis II was largely inhibited, although meiosis I was successfully completed. These findings suggest that hypergravity inhibits the bipolar spindle formation of meiosis II, and hence adversely affects the process of oocyte maturation in Xenopus laevis.
アフリカツメガエル卵成熟過程に対する過重力の影響
63349089.pdf
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