Production of Trophoblastic Vesicles Derived From Day 7 and 8 Blastocysts of In Vitro Origin and the Effect of Intrauterine Transfer on the Interestrous Intervals in Japanese Black Heifers
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概要
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This study was undertaken to produce trophoblastic vesicles (TVs) by using blastocysts of in vitro origin and to estimate the effect on the interestrous interval after transfer of 4 TVs into the uteri of heifers on Day 7. Morphological examination under a stereoscopic microscope revealed that the total formation rate of TVs prepared from IVP expanded blastocysts was 80.5% and that there was no difference in the formation rates of TVs derived from blastocysts between Day 7 (83.5%) and Day 8 (78.5%). After intrauterine transfer of TVs, observation of the corpus luteum (CL) by transrectal ultrasonography together with measurement of the plasma progesterone concentration confirmed that 2 of 4 recipients (50%) had a longer interestrous interval, 33.5 and 35.0 days, while the other 2 recipients had normal cycles, 20.0 and 24.5 days. In the control group transferred D-PBS, all 4 heifers had a normal cycles, 24.0-24.5 days. Consequently, the average number of days after intrauterine transfer of TVs compared with the 2 consecutive cycles just before the treatment was longer than in the controls (6.1 ± 2.4 days vs. -0.8 ± 1.1 days, P<0.05). These results indicate that preparation of TVs from blastocysts of in vitro origin is a useable method and that TVs from blastocysts may have the capacity to maintain CL function after intrauterine transfer.
- 日本繁殖生物学会の論文
- 2009-08-01
著者
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Miyamoto Akio
Graduate School of Animal and Food Hygiene, Obihiro University of Agriculture & Veterinary Medicine
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Miyamoto Akio
Graduate School Of Animal And Food Hygiene Obihiro University Of Agriculture And Veterinary Medicine
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Okano A
National Institute Of Livestock And Grassland Science
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Geshi M
National Institute Of Livestock And Grassland Science
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Geshi Masaya
National Institute Of Livestock And Grassland Science
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Kawashima Chiho
Graduate School of Animal and Food Hygiene, Obihiro University of Agriculture and Veterinary Medicin
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Kawashima Chiho
Graduate School Of Animal And Food Hygiene Obihiro Univ. Of Agriculture And Veterinary Medicine
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Kawashima Chiho
Graduate School Of Animal And Food Hygiene Obihiro University Of Agriculture And Veterinary Medicine
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Takahashi H
National Institute Of Livestock And Grassland Science
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NAGAI Kaya
Graduate School of Animal and Food Hygiene, Obihiro University of Agriculture and Veterinary Medicin
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Nagai Kaya
ドイツ
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Nagai Kaya
Graduate School Of Animal And Food Hygiene Obihiro University Of Agriculture And Veterinary Medicine
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Okano Akira
National Institute Of Livestock And Grassland Science
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Sata Ryuichi
Tochigi Prefectural Daily Farming Experiment Station
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TAKAHASHI Hitomi
National Institute of Livestock and Grassland Science
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Okano Akira
National Hospital Organization Shiga Hospital Shiga Jpn
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Miyamoto Akio
Graduate School Of Animal And Food Hygiene Obihiro Univ. Of Agriculture And Veterinary Medicine
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Geshi Masaya
National Inst. Of Livestock And Grassland Sci.
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Takahashi Hitomi
National Institute of Agrobiological Sciences
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