Fertilization Capacity of Mouse Oocytes Matured In Vitro : Effect of PMSG, FSH and Epidermal Growth Factor (EGF) in Serum-Free Maturation Medium
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概要
- 論文の詳細を見る
The fertilizability of mouse oocytes matured in serum-free medium was extremely lower than those matured with fetal calf serum (FCS). The addition of FCS into maturation medium, however, complicates the analytical studies on the oocyte maturation. In the present study, a chemically defined medium supplemented with fetuin, a major protein in FCS to prevent zona hardening, and one of pregnant mares serum gonadotrophin (PMSG), follicle stimulating hormone (FSH) or epidermal growth factor (EGF) was used to examine the effect on oocyte maturation and fertilizability of the oocytes. The fertilization rates of the oocytes matured with bovine serum albumin (BSA) alone or fetuin alone were significantly lower than that matured with FCS (35.3%, 44.3% and 95.5%, respectively). On the other hand, the addition of both fetuin and one of PMSG (10 iu/ml), FSH (0.1 armour unit/ml) and EGF (10 ng/ml) induced clear cumulus-expansion and improved the fertilization rates (84.1%, 88.4%, and 78.3%, respectively) to the comparable level as FCS supplementation. The removal of cumulus cells just before insemination abolished the effects of PMSG completely. These results suggest that the effects of FCS maintaining high fertilizability of in vitro matured oocytes work on both zona pellucida and cumulus-cells, and are fully replaced by fetuin and one of PMSG, FSH or EGF. This serum-free maturation system would be useful for the analysis of the factors and mechanisms regulating oocyte maturation.
- 日本繁殖生物学会の論文
- 1996-02-01
著者
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YOKOYAMA Minesuke
Mitsubishi Kagaku Institute of Life Sciences
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Sato Eimei
Department of Reproductive and Developmental Biology, Institute of Medical Science, The University o
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TOYODA Yutaka
Department of Reproductive and Developmental Biology, Institute of Medical Science, University of To
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Naito Kunihiko
Department of Reproductive and Developmental Biology, The Institute of Medical Science, The Universi
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Naito K
Laboratory Of Applied Genetics Graduate School Of Agricultural And Life Sciences University Of Tokyo
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Toyoda Y
Univ. Tokyo Tokyo Jpn
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Toyoda Y
Obihiro Univ. Agriculture And Veterinary Medicine Obihiro Jpn
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Naito K
Department Of Applied Genetics Graduate School Of Agriculture And Life Science University Of Tokyo
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Naito Kunihiko
Laboratory Of Applied Genetics Graduate School Of Agricultural And Life Sciences University Of Tokyo
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Yokoyama Minesuke
Mitsubishi Kasei Institute Of Life Sciences
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ARAKI Kazushi
Department of Reproductive and Developmental Biology, Institute of Medical Science, The University o
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SUZUKI Rika
Mitsubishi Kasei Institute of Life Sciences
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Araki Kazushi
Department Of Reproductive And Developmental Biology Institute Of Medical Science The University Of
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Toyoda Yutaka
Department Of Reproductive And Developmental Biology Institute Of Medical Science The University Of
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Sato E
Tohoku Univ. Sendai‐shi Jpn
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Naito Kunihiko
Department Of Animal Resource Sciences Graduate School Of Agricultural And Life Sciences The Univers
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Sato Eimei
Department Of Reproductive And Developmental Biology Institute Of Medical Science The University Of
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Naito K
Laboratory Of Applied Genetics Graduate School Of Agricultural And Life Sciences The University Of T
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TOYODA Yutaka
Department of Animal Pathology, Institute of Medical Science,The University of Tokyo
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Toyoda Yutaka
Department of Animal Pathology, Institute of Medical Science, University of Tokyo
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