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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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ICR female mice aged 3 to 4 weeks, were stimulated with 7.5 IU PMS injection. At 48-52h post-PMS injection, ovaries were dissected out and oocytes-cumulus complexes(OCCs) were divided into three groups, cumulus-free oocytes(O), cumulus-free oocyte cocultured with cumulus cells(O+C) and OCC. The oocyte were cultured in TCM199 containing various protein sources, FCS, BSA or PVP with gonadotropins(Gns) for 24h. Spermatozoa were collected from cauda epididymis and capacitated in T6 + BSA for 2h. After oocyte maturation in vitro(IVM) in different experimental groups, matured oocytes were inseminated with the capacitated spermatozoa in T6 + BSA for 6h. In the groups of IVM in TCM + BSA or PVP, fertilization(IVF) did not occur efficiently. However, increased fertilization was found in TCM+ FCS group. The oocytes groups, with cumulus cells showed decreased polyspermy in FCS group (O; 31.8 %, O + C; 12.2 %, OCC; 16%), the addition of Gns did not prevent polyspermy in all three groups. The rates of fertilization increased in zona-free oocytes in PVP group. This results showed that culture system for IVM and IVF could be improved. Furthermore, PVP can be used for the substitution of protein source during maturation, and its low rate of fertilization has been found due to zona hardening which occurred in FCS-free medium.
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