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Stimulatory Effect of Porcine Epididymal Fluid on In Vitro Maturation of Porcine Immature Oocytes  

Yim, Cha-Ok (Department of Molecular Biology, Dong-Eui University)
Lee, Seung-Min (Department of Molecular Biology, Dong-Eui University)
Kim, Hye-Rim (Department of Molecular Biology, Dong-Eui University)
Jabed Md. Anower (Department of Molecular Biology, Dong-Eui University)
Lee, Chin-Bum (Department of Molecular Biology, Dong-Eui University)
Kim, Byung-Ki (Department of Molecular Biology, Dong-Eui University)
Publication Information
Reproductive and Developmental Biology / v.30, no.4, 2006 , pp. 301-305 More about this Journal
Abstract
The aim of this study was to investigate whether addition of porcine epididymal fluid (pEF) into culture medium during in vitro maturation influences the nuclear maturation of porcine germinal vesicle (GV) oocytes. Porcine cumulus-oocyte complexes (COCs) from follicles were cultured in tissue culture medium 199 (TCM 199) containing pEF. After 48hr of culture, oocytes were examined for evidence of GV breakdown, metaphase I, anaphase-telophase I, and metaphase II. The proportion of oocytes reaching at metaphase II (M II) stage was significantly (p<0.05) increased in oocytes cultured in the media supplemented with 10% pEF during in vitro maturation than in those without pEF regardless of cumulus presence or absence (54.6% vs 22.5%, 51.7% vs 24.2%). The supplementation of pEF during maturation of oocyte enhanced oocytes maturation in a dose-dependent manner in vitro. Also significant differences (p<0.05) in the percentage of MII oocytes were observed according to exposure period in pEF. Present study suggests that pEF contains a enhancing component(s) for nuclear maturation of porcine immature oocytes in vitro.
Keywords
Porcine; Epididymal fluid; In vitro maturation; Oocytes;
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