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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
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).
TLDR
These results provide the first evidence in any ectothermic vertebrate, the amago salmon, of the duality of gonadotropin receptors. Expand
Cloning, functional characterization, and expression of a gonadotropin receptor cDNA in the ovary and testis of amago salmon (Oncorhynchus rhodurus).
TLDR
Results indicate that the cloned cDNA encodes a functional amago salmon GTH receptor protein, which belongs to the glycoprotein hormone receptor family with a large extracellular and seven-transmembrane domains. Expand
Neuronal peptides induce oocyte maturation and gamete spawning of sea cucumber, Apostichopus japonicus.
TLDR
The details of the production and the mechanism of action of NGIWYamide are still unclear, but the high biopotency of the peptide will aid understanding of the neuronal and hormonal control of reproduction of sea cucumber. Expand
A shift in steroidogenesis occurring in ovarian follicles prior to oocyte maturation
TLDR
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. Expand
Cloning and expression of two carbonyl reductase-like 20β-hydroxysteroid dehydrogenase cDNAs in ovarian follicles of rainbow trout (Oncorhynchus mykiss)
TLDR
The isolation of two cDNAs which encode proteins with high homology to carbonyl reductase-like 20beta- HSD (CR/20beta-HSD) from rainbow trout (Oncorhynchus mykiss) ovarian follicles clearly demonstrate the presence of two distinct CR/20 BetaHSD transcripts in the trout ovary. Expand
Molecular cloning of DAX1 and SHP cDNAs and their expression patterns in the Nile tilapia, Oreochromis niloticus.
TLDR
Tissue distribution analysis by RT-PCR showed that fish DAX1 and SHP mRNAs are widely expressed in adult tissues, with the most abundant expression in gonads and liver, respectively, while the expression of SHP is moderate and consistent during the ontogeny. Expand
Ontogenic expression patterns of several nuclear receptors and cytochrome P450 aromatases in brain and gonads of the Nile tilapia Oreochromis niloticus suggests their involvement in sex
TLDR
It is suggested that brain acts merely as a synchronizer in the sex differentiation process initiated by gonadal cues/factors in the Nile tilapia. Expand
Blarina toxin, a mammalian lethal venom from the short-tailed shrew Blarina brevicauda: Isolation and characterization.
TLDR
The acute toxicity and proteolytic activity of BLTX were strongly inhibited by aprotinin, a kallikrein inhibitor, suggesting that its toxicity is due to a kallekrein-like activity of the venom. Expand
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