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Watanabe, Kazuyo*; Akitsuki, Takashi*; Shimura, Sachiko*; Gusev, O.*; Cornette, R.*; Kikawada, Takahiro*; Sakashita, Tetsuya; Funayama, Tomoo; Kobayashi, Yasuhiko; Okuda, Takashi*
JAEA-Review 2014-050, JAEA Takasaki Annual Report 2013, P. 87, 2015/03
The Sleeping Chironomid, can stand complete desiccation (anhydrobiosis) and also shows radio-resistance. Recently, we have generated cultured cell (Pv11) originated from embryo which can also stand complete dehydration. In this study, we examine the tolerance of cultured cell Pv11 against ionbeam irradiation.
Gusev, O.*; Nakahara, Yuichi*; Vanyagina, V.*; Malutina, L.*; Cornette, R.*; Sakashita, Tetsuya; Hamada, Nobuyuki*; Kikawada, Takahiro*; Kobayashi, Yasuhiko; Okuda, Takashi*
PLoS ONE (Internet), 5(11), p.e14008_1 - e14008_9, 2010/11
Times Cited Count:49 Percentile:75.31(Multidisciplinary Sciences)Anhydrobiotic chironomid larvae can withstand prolonged complete desiccation as well as other external stresses including ionizing radiation. To understand the cross-tolerance mechanism, we have analyzed the damage and repair in the nuclear DNA using DNA comet assays and gene expression in relation to anhydrobiosis and radiation. We found that dehydration causes alterations in chromatin structure and a severe fragmentation of nuclear DNA in the cells of the larvae despite successful anhydrobiosis. Furthermore, while the larvae have restored physiological activity within an hour following rehydration, nuclear DNA restoration typically took 72 to 96 h.
Nakahara, Yuichi*; Watanabe, Masahiko*; Sakashita, Tetsuya; Hamada, Nobuyuki*; Gusev, O.*; Fujita, Akihiko*; Kikawada, Takahiro*; Horikawa, Daiki*; Kobayashi, Yasuhiko; Okuda, Takashi*
no journal, ,
The present study aims to evaluate effects of anhydrobiosis on radiation tolerance in an anhydrobiotic insect, . Wet larvae were killed in a dose-dependent manner at doses higher than 2000 Gy, and all died within 8 h after 4000 Gy exposure. However, anhydrobiosis did not protect against radiation damage in terms of producing viable offspring. These results indicate that anhydrobiosis enhances radiotolerance in larvae, but not in the delayed effects of development.
Takahashi, Yuichi*; Shibata, Shimpei*; Yokoyama, Jun*; Hashimoto, Hirofumi*; Yokobori, Shinichi*; Yamagishi, Akihiko*; Kawaguchi, Yuko*; Gusev, O.*; Narumi, Issei; Sato, Katsuya; et al.
no journal, ,
no abstracts in English
Warashina, Tomoro*; Sato, Asako*; Shagimardanova, E.*; Maruyama, Shigenori*; Mori, Hiroshi*; Narumi, Issey*; Gusev, O.*; Saito, Motofumi*; Sanada, Yukihisa; Sasaki, Yoshito; et al.
no journal, ,
no abstracts in English