Developmental expression of three different prepro-GnRH (Gonadotrophin-releasing hormone) messengers in the brain of the European sea bass (Dicentrarchus labrax)

D Gonzalez-Martinez; N Zmora; S Zanuy; C Sarasquete; Abigail Elizur; O Kah; J A Munoz-Cueto

doi:10.1016/S0891-0618(02)00004-2

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Developmental expression of three different prepro-GnRH (Gonadotrophin-releasing hormone) messengers in the brain of the European sea bass (Dicentrarchus labrax)

Journal article

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Developmental expression of three different prepro-GnRH (Gonadotrophin-releasing hormone) messengers in the brain of the European sea bass (Dicentrarchus labrax)

D Gonzalez-Martinez, N Zmora, S Zanuy, C Sarasquete, Abigail Elizur, O Kah and J A Munoz-Cueto

Journal of Chemical Neuroanatomy, Vol.23(4), pp.255-267

2002

DOI: https://doi.org/10.1016/S0891-0618(02)00004-2

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Abstract

Neurosciences

ontogenesis

GAP

central nervous system

perciform

in situ hybridization

In this study, we have analyzed the ontogenic expression of three gonadotrophin-releasing hormones (GnRH) systems expressed in the brain of a perciform fish, the European sea bass, using in situ hybridization. The riboprobes used correspond to the GnRH-associated peptide (GAP) coding regions of the three prepro-GnRH cDNAs cloned from the same species: prepro-salmon GnRH, prepro-seabream GnRH and prepro-chicken GnRH II. On day 4 after hatching, the first prepro-chicken GnRH-II mRNA-expressing cells appeared in the germinal zone of the third ventricle. They increased in number and size from 10 to 21 days, reaching at day 30 their adult final position, within the synencephalic area, at the transitional zone between the diencephalon and the mesencephalon. First prepro-salmon GnRH mRNA-expressing cells became evident on day 7 arising from the olfactory placode and migrating towards the olfactory nerve. On day 10, this cell group reached the olfactory bulb, being evident in the ventral telencephalon and preoptic area from days 15 and 45, respectively. Weakly labeled prepro-seabream GnRH mRNA-expressing cells were first detected at 30 days in the olfactory area and ventral telencephalon. On day 45, prepro-seabream GnRH mRNA-expressing cells were also present in the preoptic region reaching the ventrolateral hypothalamus on day 60. The results obtained in sea bass indicate that sGnRH and sbGnRH cells have a common origin in an olfactory primordium suggesting that both forms might arise from a duplication of a single ancestral gene, while cGnRH-II cells develop from a synencephalic primordium.

Details

Title: Developmental expression of three different prepro-GnRH (Gonadotrophin-releasing hormone) messengers in the brain of the European sea bass (Dicentrarchus labrax)
Authors: D Gonzalez-Martinez (Author) - Universidad de Cadiz, Spain
N Zmora (Author) - National Centre for Mariculture Israel, Israel
S Zanuy (Author) - Instituto de Acuicultura Torre de la Sal, Spain
C Sarasquete (Author) - Instituto de Ciencias Marinas de Andalucia, Spain
Abigail Elizur (Author) - National Center for Mariculture, Israel
O Kah (Author) - Campus de Beaulieu, France
J A Munoz-Cueto (Author) - Universidad de Cadiz, Spain
Publication details: Journal of Chemical Neuroanatomy, Vol.23(4), pp.255-267
Publisher: Elsevier BV
Date published: 2002
DOI: 10.1016/S0891-0618(02)00004-2
ISSN: 0891-0618
Organisation Unit: University of the Sunshine Coast, Queensland; Centre for Bioinnovation
Language: English
Record Identifier: 99449984102621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Biochemistry & Molecular Biology; Neurosciences

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