title: In vitro-growth and Gene Expression of Porcine Preantral Follicles Retrieved by Different Protocols.
abstract: This study was conducted to determine how the isolation method of the porcine preantral follicles influenced the following follicular growth in vitro. Mechanical and enzymatical isolations were used for retrieving the follicles from prepubertal porcine ovaries, and in vitro-growth of the follicles and the expression of folliculogenesis-related genes were subsequently monitored. The enzymatic retrieval with collagenase treatment returned more follicles than the mechanical retrieval, while the percentage of morphologically normal follicles was higher with mechanical retrieval than with enzymatic retrieval. After 4 days of culture, mechanically retrieved, preantral follicles yielded more follicles with normal morphology than enzymatically retrieved follicles, which resulted in improved follicular growth. The mRNA expression of FSHR, LHR Cx43, DNMT1 and FGFR2 genes was significantly higher after culture of the follicles retrieved mechanically. These results suggest that mechanical isolation is a better method of isolating porcine preantral follicles that will develop into competent oocytes in in vitro culture.
authors: Department of Animal Biotechnology, Kangwon National University, Chunchon 200-701, Korea.
authors: J I
authors: JI
authors: Ahn
authors: Department of Animal Biotechnology, Kangwon National University, Chunchon 200-701, Korea.
authors: S T
authors: ST
authors: Lee
authors: Department of Animal Biotechnology, Kangwon National University, Chunchon 200-701, Korea.
authors: J H
authors: JH
authors: Park
authors: School of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University, Chunchon 200-701, Korea .
authors: J Y
authors: JY
authors: Kim
authors: Department of Animal Biotechnology, Kangwon National University, Chunchon 200-701, Korea.
authors: J H
authors: JH
authors: Park
authors: Department of Animal Biotechnology, Kangwon National University, Chunchon 200-701, Korea.
authors: J K
authors: JK
authors: Choi
authors: School of Dentistry, Seoul National University, Seoul 110-742, Korea .
authors: G
authors: G
authors: Lee
authors: School of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University, Chunchon 200-701, Korea .
authors: E S
authors: ES
authors: Lee
authors: Department of Animal Biotechnology, Kangwon National University, Chunchon 200-701, Korea.
authors: J M
authors: JM
authors: Lim
keywords: Enzymatic Retrieval; Follicular Growth; In vitro Culture; Mechanical Retrieval; Porcine; Preantral Follicle