Effect of strong static magnetic fields on the amphibian life cycle: Effect on oocyte maturation of Silurana tropicalis
| Autor: | Furuno, Nobuaki, Futsuki, Daisuke, Kawasaki, Taishi, Shiraga, Masaya, Tanimoto, Yoshifumi, Kashiwagi, Keiko, Suzuki, Kenichi, Yamashita, Masamichi, Kashiwagi, Akihiko |
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| Jazyk: | japonština |
| Rok vydání: | 2010 |
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| Zdroj: | 宇宙利用シンポジウム = Space Utilization Research: Proceedings of Space Utilization Symposium. 26 |
| Popis: | 第26回宇宙利用シンポジウム(2010年1月25日-26日, 宇宙航空研究開発機構宇宙科学研究本部相模原キャンパス) The Twenty-sixth Space Utilization Symposium (January 25-26, 2010: ISAS/JAXA Sagamihara, Japan) In the present study, we investigated the effects of a strong static magnetic field (SMF) on oocyte maturation in Silurana tropicalis. First of all, we confirmed that oocyte maturation is triggered by progesterone, and this triggering is required for translation but not transcription. Under SMF the kinetics of initiation of oocyte maturation, as judged by the appearance of a white spot in the animal hemisphere, was found to be essentially the same as for controls. Cytological examination of treated specimens showed that the first polar body was excluded and spindle of meiosis II was successfully formed. However, as maturation proceeded, distribution of the pigment in the vegetable hemisphere became abnormal. The most of the white band characteristic of stage VI oocytes descended toward the vegetal pole and the rest of it invaded animal hemisphere. These results suggest that SMF might affect the progression of oocyte maturation. 共催: 日本学術会議 joint hosting: The Science Council of Japan 資料番号: AA0064730084 |
| Databáze: | OpenAIRE |
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