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Cloning and expression of kiss2 in the zebrafish and medaka.
TLDR
The results suggest that the habenular Kiss1 and the hypothalamic Kiss2 are potential regulators of reproduction including puberty and that Kiss2 is the predominant regulator of gonadotropin synthesis in fish.
Laser-captured single digoxigenin-labeled neurons of gonadotropin-releasing hormone types reveal a novel G protein-coupled receptor (Gpr54) during maturation in cichlid fish.
TLDR
It is proposed that the expression of GPR54 is a "stop signal" for GnRH1, GnRH2, and GnRH3 neuronal migration, leading to suppression of cell growth and modulation of GnRH secretion, which is important for normal sexual development.
Organization of two independent kisspeptin systems derived from evolutionary-ancient kiss genes in the brain of zebrafish.
TLDR
The data indicate that the kiss2 systems of zebrafish are implicated in reproductive events, while the kiss1 gene would play other functions that remain to be established.
Ghrelin gene in cichlid fish is modulated by sex and development.
Cloning and expression of tachykinins and their association with kisspeptins in the brains of zebrafish
TLDR
The coexpression of tachykinins and two kisspeptin genes in the brain of zebrafish is examined and the results suggest the presence of independent pathways for kisspeptins and NKB neurons in the Brain of Zebrafish.
Kisspeptin1 modulates odorant‐evoked fear response via two serotonin receptor subtypes (5‐HT1A and 5‐HT2) in zebrafish
TLDR
It is concluded that Kiss1 modulates AS‐evoked fear responses mediated by the 5‐HT1A and5‐HT2 receptors, as well as the involvement of the 5-HT receptor subtypes in AS‐ Evoked fear.
RFamide peptides as mediators in environmental control of GnRH neurons
TLDR
Two key RFamide peptides, kisspeptin and gonadotropin-inhibitory hormone, are emerging as important regulators of the reproductive axis, with Kisspeptin acting as the accelerator, directly driving GnRH neurons, whereas GnIH acts as the restraint.
Thyroid hormone and estrogen regulate brain region-specific messenger ribonucleic acids encoding three gonadotropin-releasing hormone genes in sexually immature male fish, Oreochromis niloticus.
TLDR
The results are consistent with the hypothesis that thyroid hormone, by suppressing terminal nerve GnRH expression, promotes inhibition of sexual maturation and emphasize that an estrogenic pathway, at the onset ofSexual maturation, is responsible for the recruitment of additional preoptic GnRH neurons that are fundamental to reproduction and behavior.
Direct regulation of gonadotropin release by neurokinin B in tilapia (Oreochromis niloticus).
TLDR
The results suggest that the members of the NKB/tac3r system may serve as paracrine/autocrine regulators of gonadotropin release in fish pituitary.
Immunocytochemical and Ultrastructural Identification of Pituitary Cell Types in the Protogynous Thalassoma duperrey during Adult Sexual Ontogeny
TLDR
Protogynous wrasses (Thalassoma duperrey) along with a few terminal-phase males (TM) and sex-changed males (SM), were used to characterize the topographical organization of the pituitary, and immunocytochemical and ultrastructural features of the adenohypo-physeal cell types of the saddleback wrasse pituitsary resemble those of other teleosts.
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