INFLUENCE OF NOCODAZOLE ON THE DEVELOPMENT OF DONOR BLASTOMERES FROM 16-CELL STAGE BOVINE EMBRYOS IN NUCLEAR TRANSFER
スポンサーリンク
概要
- 論文の詳細を見る
The aim of the present study was to establish a reliable procedure with nocodazole treatment for the synchronous cleavage of blastomeres of bovine embryos used as nuclear donors for nuclear transfer. Sixteen-cell stage embryos derived from in vitro-maturation, fertilization and culture were used. In three initial experiments, embryos were incubated in mTCM-199+FCS with various concentrations (0-20μM) of nocodazole under 5 % CO_2 in air. The concentrations required to arrest the blastomeres in the mitotic phase were examined. The effects of 10μM nocodazole were also examined by observation of the division rate of blastomeres after the removal of nocodazole. Ninety percent (90 %) of the blastomeres were arrested in the mitotic phase when embryos were exposed to 10 and 20μM nocodazole. Exposure to 10μM nocodazole had the highest blastomere-cleavage rate (47 %). When the exposure period to 10μM nocodazole was prolonged to 36 hr, the division rate of the blastomeres decreased. Furthermore, the effects of 2 culture conditions (mTCM-199 under 5 % CO_2 in air vs modified synthetic oviduct fluid medium under 5 % CO_2,5 % O_2 and 90 % N_2) were compared on the division rate of blastomeres of embryos exposed to 10μM nocodazole for 12 hr. When the embryos were exposed to nocodazole in mSOF, the division rate of blastomeres was improved to about 60 %. The blastomeres produced by this treatment condition were used as nuclear donors and the developmental potential of the reconstituted embryos was investigated. The developmental rate to the blastocyst stage was 30.1 % (58/ 193). Five embryos were transferred to 5 recipient cows and 2 of the 5 recipients (40 %) became pregnant. Subsequently, one normal calf was born.
- 北海道大学の論文
- 1995-06-15
著者
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TAKAHASHI Yoshiyuki
Laboratory of Theriogenology, Department of Veterinary Clinical Sciences, Graduate School of Veterin
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Takahashi Yoshiyuki
北海道大学 獣医学研究科繁殖学教室
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Takahashi Y
Laboratory Of Theriogenology Department Of Clinical Sciences Graduate School Of Veterinary Medicine
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Takahashi Yoshiyuki
Lab. Of Theriogenology Dep. Of Veterinary Clinical Sciences Graduate School Of Veterinary Medicine H
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KANAGAWA Hiroshi
Laboratory of Theriogenology, Department of Veterinary Clinical Sciences, Graduate School of Veterin
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Takakura Hirosuke
Laboratory Of Theriogenology Department Of Veterinary Clinical Science Graduate School Of Veterinary
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Kanagawa H
Hokkaido Univ. Sapporo Jpn
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HISHINUMA Mitsugu
Laboratory of Theriogenology, Department of Veterinary Clinical Science, Graduate School of Veterina
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TANAKA Hozumi
Laboratory of Theriogenology, Department of Veterinary Clinical Science, Graduate School of Veterina
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KARIYA Takayoshi
Laboratory of Animal Reproduction, The Hokkaido National Agricultural Experiment Station, Hitsujigao
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Takahashi Yoshiyuki
Laboratory Of Theriogenology Department Of Veterinary Clinical Sciences Graduate School Of Veterinar
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Hishinuma M
Tottori Univ. Tottori Jpn
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Kanagawa Hiroshi
Laboratory Of Theriogenology Department Of Veterinary Clinical Sciences Graduate School Of Veterinar
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Kariya Takayoshi
Laboratory Of Animal Reproduction The Hokkaido National Agricultural Experiment Station Hitsujigaoka
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Kanagawa Hiroshi
Laboratory of Theriogenology, Department of Veterinary, Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University
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