M
Michiyasu Yoshikuni
Researcher at Kyushu University
Publications - 74
Citations - 2632
Michiyasu Yoshikuni is an academic researcher from Kyushu University. The author has contributed to research in topics: Oocyte & Ovarian follicle. The author has an hindex of 27, co-authored 73 publications receiving 2488 citations. Previous affiliations of Michiyasu Yoshikuni include National Institute for Basic Biology, Japan & National Institutes of Natural Sciences, Japan.
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Book ChapterDOI
Regulation of oocyte growth and maturation in fish
TL;DR: Of considerable interest is the finding that MIH, unlike most steroid hormones, acts on its receptors at the surface of oocytes, and the mechanism of MIH-induced MPF activation in fish oocytes differs from that in Xenopus and starfish.
Journal ArticleDOI
A shift in steroidogenesis occurring in ovarian follicles prior to oocyte maturation
TL;DR: A distinct shift in steroidogenesis, i.e. from E(2) to 17 alpha,20 beta-DP as well as the steroidogenic enzyme genes from ovarian cytochrome P450 aromatase (oP450arom) to 20 beta-hydroxysteroid dehydrogenase (20beta-HSD), occurs in the granulosa layers of ovarian follicles prior to oocyte maturation.
Journal ArticleDOI
The duality of fish gonadotropin receptors: cloning and functional characterization of a second gonadotropin receptor cDNA expressed in the ovary and testis of amago salmon (Oncorhynchus rhodurus).
Yuichi Oba,Toshiaki Hirai,Yasutoshi Yoshiura,Michiyasu Yoshikuni,Hiroshi Kawauchi,Yoshitaka Nagahama +5 more
TL;DR: These results provide the first evidence in any ectothermic vertebrate, the amago salmon, of the duality of gonadotropin receptors.
Journal ArticleDOI
A relaxin-like peptide purified from radial nerves induces oocyte maturation and ovulation in the starfish, Asterina pectinifera
Masatoshi Mita,Michiyasu Yoshikuni,Kaoru Ohno,Yasushi Shibata,Bindhu Paul-Prasanth,Suthasinee Pitchayawasin,Minoru Isobe,Yoshitaka Nagahama +7 more
TL;DR: Together, the structure, sequence, and mode of signal transduction strongly suggest that GSS is closely related to the vertebrate relaxin.
Journal ArticleDOI
A Monoclonal Antibody Against the PSTAIR Sequence of p34cdc2, Catalytic Subunit of Maturation‐Promoting Factor and Key Regulator of the Cell Cycle: (monoclonal antibody/PSTAIR sequence/oocyte maturation/cell cycle/cdc2)
TL;DR: Immunoblotting with the anti‐PSTAIR antibody demonstrated that the fastest‐migrating form of p34cdc2 homologues becomes abundant, when oocytes mature or the cell enters M phase, and the possible significance of this observation is discussed.