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Regulation of oocyte maturation in fish
TLDR
It is revealed that a dramatic increase in the capacity of postvitellogenic follicles to produce 17α,20β‐DP in response to LH is correlated with decreases in P450c17 (P450c 17‐I) and P450 aromatase (oP450arom) mRNA and increases in the novel form of P450 c17‐II and 20β‐hydroxysteroid dehydrogenase (20 β‐HSD) mRNA. Expand
Maturation/M-Phase Promoting Factor: A Regulator of Aging in Porcine Oocytes1
TLDR
The results indicate that not only the increased ability for parthenogenetic activation but also the increased fragmentation rate observed in porcine aged oocytes may be attributable in part to the gradual decrease in MPF activity during prolonged culture. Expand
Regulation of oocyte growth and maturation in fish.
TLDR
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. Expand
Activation of p34cdc2 protein kinase activity in meiotic and mitotic cell cycles in mouse oocytes and embryos.
TLDR
It is shown that p34cdc2 has three different migrating bands (referred to as upper, middle and lower bands) on SDS-PAGE followed by immunoblotting with anti-PSTAIR antibody, and that the upper and middle bands are phosphorylated forms since these two bands shifted to the lower one by alkaline phosphatase treatment. Expand
Biochemical Identification of Xenopus Pumilio as a Sequence-specific Cyclin B1 mRNA-binding Protein That Physically Interacts with a Nanos Homolog, Xcat-2, and a Cytoplasmic Polyadenylation
TLDR
In vivo interaction between Xenopus Pumilio and CPE-binding protein (CPEB), a key regulator of translational repression and activation of mRNAs stored in oocytes, and physical in vitro association of XenopusPumilIO with a Xenopus homolog of Nanos (Xcat-2) was demonstrated by a protein pull-down assay. Expand
Zebrafish DAZ‐like protein controls translation via the sequence ‘GUUC’
TLDR
This work has shown that DAZ homologous genes encode RNA‐binding proteins containing two conserved motifs, namely the RNA‐recognition motif (RRM) and the DAZ motif, which are important for gametogenesis in many species. Expand
Molecular mechanisms of the initiation of oocyte maturation: general and species-specific aspects.
TLDR
The mechanisms regulating the initial phase of oocyte maturation, from the reception of hormonal signals on the oocyte surface to activation of the maturation-promoting factor in the cytoplasm, are summarized in amphibians, fishes, mammals and marine invertebrates. Expand
Expression of Xenopus Daz-like protein during gametogenesis and embryogenesis
TLDR
This is the first detailed report on the protein expression of a Daz-like gene during gametogenesis and embryogenesis in Xenopus, showing the difference in expression patterns of its mRNA and protein. Expand
Temporally and spatially selective loss of Rec8 protein from meiotic chromosomes during mammalian meiosis
TLDR
It is proposed that mammalian Rec8 protein, in association with SMC3 and SMC1β but not SMC 1α, is involved in meiosis-specific chromosome behavior, and that homologous chromosome separation is triggered by selective loss of Rec8 from chromosome arms in meiotic I, while sister chromatid cohesion is maintained until metaphase II/anaphase II transition by centromeric Rec8 during mammalian meiosis. Expand
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