Department of Life Science, Graduate School of Arts and Sciences, University of Tokyo
Shimoda Marine Research Center, University of Tsukuba
Shimizu Institute of Space Physiology, Suwa Maternity Clinic
Development of Human Relation, Wako University
Department of Regulatory Physiology, Dokkyo Medical University
Department of Advanced Bioscience, Ochanomizu Univerisity
Department of Biology, Faculty of Science, Yamagata University
Department of Chemistry and Chemical Engineering, Graduate School of Science and Engineering, Yamagata University
Department of Life Science, Graduate School of Arts and Sciences, University of Tokyo
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)
雑誌名
宇宙利用シンポジウム
雑誌名(英)
Space Utilization Research: Proceedings of Space Utilization Symposium
The Twenty-sixth Space Utilization Symposium (January 25-26, 2010: ISAS/JAXA Sagamihara, Japan)
抄録（英）
We have been organizing a working group for studying the reproduction and continuity of life under the space environment. The aim of our project is to get deep insight into the effect of space environment, especially the effects of gravity for long period of time, on reproduction. We show four results here. The first one is the evaluation of the quality of egg and embryo by respiration activity of them individually by means of micro oxygen electrode. This new method was excellent for selecting high quality eggs of bovine and gave high ratio of fertility. The second experiment using medaka also gave us the information about the seasonal change of germ cell number. It was likely that number of spermatocyte was regulated by apoptosis. The third experiment, using mice, revealed that the hyper gravity, 3G, caused decrease in food intake, however, the mice were in repletion. Measurement of hormones such as leptin, insulin and ghrelin showed starvation condition. However, NPY measurement suggested low food appetite suggesting that 3G affected the regulatory mechanism involved in NPY neurons. The fourth experiment was about human reproduction in space. The position of baby in uterus was recorded when attitude of mother was changed. The data were compared with the simulation experiments. The results suggested that space environment might increase problems on birth. We move ahead to new approaches for study on reproduction in space.
宇宙環境下における生殖・継世代研究の展開: VI
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