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Rendon, C. Javier; Rodríguez-Gómez, Francisco Javier; Muñoz‐Cueto, José Antonio; Piñuela, Carmen; Sarasquete, Carmen

doi:10.1023/a:1026481521916

Cited by 26 publications

(5 citation statements)

References 35 publications

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“…GH cells were located mainly in the dorsal central PD and were arranged in thin strands in the ventral part of A. gigas pituitary gland. This distribution is in agreement with other teleosts, as reported previously (see Ball and Baker 1969;Holmes and Ball 1974;Schreibman et al 1973) and in more recent studies (Parhar et al 1998;Rendón et al 1997;Rodríguez-Gómez et al 2001;Sánchez Cala et al 2003;Segura-Noguera et al 2000;Vissio et al 1997), although some variations may occur, depending on the species and developmental stage (García-Hernández et al 1996;Villaplana et al 2000;Sánchez Cala et al 2003).…”

Section: Structure Of the Pituitary Glandsupporting

confidence: 93%

“…The ACTH/MSH family The ACTH amino acid sequence at position 1-24 (of 39 amino acid residues that composes the entire molecule) seems to be constant in mammals (Agulleiro et al 2006) and in teleosts, as most of the studied species have cells immunoreactive to human ACTH (1-24) antiserum Grandi et al 2003;Laiz-Carión et al 2003;Rendón et al 1997;Sánchez Cala et al 2003;Segura-Noguera et al 2000). In our study, this antiserum also immunostained ACTH cells at the rostral part of the pituitary.…”

Section: Structure Of the Pituitary Glandmentioning

confidence: 99%

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Immunocytochemical identification of adenohypophyseal cells in the pirarucu (Arapaima gigas), an Amazonian basal teleost

Borella

Venturieri

Mancera

2008

Fish Physiol Biochem

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The adenohypophysis (AH) of juvenile pirarucu (Arapaima gigas), a representative species of the Osteoglossomorpha (bonytongue fishes, one of the oldest living groups of the teleosts), was studied using histochemical and immunocytochemical methods. The AH is comprised of the pars distalis (PD), without a clear distinction between rostral pars distalis (RPD) and proximal pars distalis (PPD), and the pars intermedia (PI). The neurohypophysis (NH) is positioned on top of the PD and penetrates and branches into the PI. In the most rostral dorsal portion of the PD, adrenocorticotropic cells and fusiform gonadotropic cells were found. In the central PD, scarce prolactin-producing cells and growth-hormone-producing cells were located mainly in the dorsal part, whereas round gonadotropic cells were abundant in the ventral portion of this region. Human thyrotropin immunoreactive cells were not found in the entire AH. In the PI, melanotropic, some adrenocorticotropic, and somatolactin-producing cells were located intermingled surrounding the neurohypophyseal branches. Our results showed that the A. gigas pituitary has some basal characteristics between the ancient Actinopterygii and the more derived teleosts.

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Section: Structure Of the Pituitary Glandsupporting

confidence: 93%

Section: Structure Of the Pituitary Glandmentioning

confidence: 99%

Immunocytochemical identification of adenohypophyseal cells in the pirarucu (Arapaima gigas), an Amazonian basal teleost

Borella

Venturieri

Mancera

2008

Fish Physiol Biochem

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“…These results are consistent with morphological studies in sole and other teleosts, which showed the presence of Gnrh-ir cells and/or fibers in the terminal nerve area, known for the presence of Gnrh-3 cells (Rend on et al 1997;Gonz alez-Martínez et al, 2002), and in the proximal pars distalis of the pituitary in the vicinity of gonadotropic cells (Rend on et al 1997). Similar results were obtained in goldfish, where Gnih-3 treatment reduced gnrh-3 transcript levels at 12 hr postinjection (Qi et al, 2013a).…”

Section: Abundant Studies Have Reported the Inhibitory Role Of Gnih Onsupporting

confidence: 91%

Gonadotropin‐inhibitory hormone in the flatfish, Solea senegalensis: Molecular cloning, brain localization and physiological effects

Aliaga-Guerrero

Paullada-Salmerón

Piquer

et al. 2017

J of Comparative Neurology

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Recently, gonadotropin-inhibitory hormone (GnIH) has emerged as an important regulator of reproduction in birds and mammals. This RFamide neuropeptide has neuromodulatory functions and controls the synthesis and/or release of gonadotropin-releasing hormone (GnRH) and gonadotropins. Although teleosts represent about half of all living vertebrates, scientific and technological advances on the Gnih system in fish are scarce, contradictory, and inconclusive. Research on the fish Gnih system appears necessary to better clarify its role in the neuroendocrine and environmental control of vertebrate reproduction. In this study, we cloned a full-length sequence for the Gnih precursor of a flatfish, the Senegalese sole, coding for three putative Gnih peptides (ssGnih). We also generated specific antibodies against these ssGnih peptides, and used them to localize Gnih cells and their projections in the brain and pituitary. The expression of gnih was particularly evident in the diencephalon, but also in the olfactory bulbs/cerebral hemispheres, optic tectum/tegmentum, retina, and pituitary. The three antibodies used provided consistent results and showed that ssGnih-immunoreactive perikarya were present in the olfactory bulbs, ventral telencephalon, caudal preoptic area, dorsal tegmentum and rostral rhombencephalon, and their fibers innervated the brain and pituitary profusely. Intramuscular injection of ssGnih-3 provoked a significant reduction in gnrh-3 and lh expression, whereas ssGnih-2 treatment did not affect transcript levels of the main reproductive genes. Our results reveal the existence of a functional Gnih system in the sole brain, profusely innervating different brain areas and the pituitary gland, which could represent an important factor in the neuroendocrine control of flatfish reproduction.

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“…This is the typical distribution for MSH and SL cells reported for other teleosts [6,8,[20][21][22]. However, in Solea senegalensis [46] and Thalassoma duperry [31] MSH cells appear to surround the SL cells.…”

Section: Acth and α-Msh Cellssupporting

confidence: 71%

Immunocytochemical identification and distribution of the cell types in the pituitary gland of <i>Bagrus bayad</i> (<i>Teleostei, Bagridae</i>)

Mousa¹,

Khalil²,

Hashem³

2012

WJNS

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Immunocytochemical identification of the different cell types in the pituitary gland of Bagrus bayad was performed using antisera against mammalian (human and rat) and piscine hormones. The adenohypophysis was composed of rostral pars distalis (RPD), proximal pars distalis (PPD) and pars intermedia (PI). Prolactin and adrenocorticotrophic cells were located in the rostral pars distalis of the pituitary. Gonadotrophic and growth hormone cells were distributed in the proximal pars distalis, but gonadotrophic cells appear also at the border of the pars intermedia. Somatolactin cells, as well as alpha-melanotrophic cells were located in the pars intermedia of B. bayad pitui-tary. The prolactin (PRL) cells were distributed in the RPD stained with orange G and showed strong immunoreactivity with antiserum to chum salmon. The adrenocorticotrophic (ACTH) cells were lead hema-toxylin-positive (PbH+) and showed strong im- mu-noreactivity with anti-human ACTH; these cells bor-dered the neurohypophysis and grouped in islets be-tween PRL cells in the RPD. Growth hormone (GH) cells were densely distributed with the gonadotrophic (GTH) cells in the PPD. They were orange G positive and reacted with antiserum to chum salmon. GTH cells were located in the central area of the PPD and in the external border of the PI. These cells were Alcyan Blue and PAS positive, and immunostained with anti-chum salmon GTH Iβ and anti-chum salmon GTH IIβ. In addition, antiserum to rat thyrotropin stimulating hormone β (TSHβ) reacted positively to the GTH cells. These results suggest that GTH I, GTH II and TSH are synthesized in the same cells in the pituitary of B. bayad. The PI was composed mainly of PbH+ cells and a PAS+ cell adjacent to the neurohypophysis. The PAS+ cells from the PI bound specifically to anti-chum somatolactin. Anti-alpha- melanin stimulating hormone (MSH) stained only the PbH+ (alpha-melanotrophic) cells of the PI

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Cited by 26 publications

References 35 publications

Immunocytochemical identification of adenohypophyseal cells in the pirarucu (Arapaima gigas), an Amazonian basal teleost

Immunocytochemical identification of adenohypophyseal cells in the pirarucu (Arapaima gigas), an Amazonian basal teleost

Gonadotropin‐inhibitory hormone in the flatfish, Solea senegalensis: Molecular cloning, brain localization and physiological effects

Immunocytochemical identification and distribution of the cell types in the pituitary gland of <i>Bagrus bayad</i> (<i>Teleostei, Bagridae</i>)

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Untitled

Cited by 26 publications

References 35 publications

Immunocytochemical identification of adenohypophyseal cells in the pirarucu (Arapaima gigas), an Amazonian basal teleost

Immunocytochemical identification of adenohypophyseal cells in the pirarucu (Arapaima gigas), an Amazonian basal teleost

Gonadotropin‐inhibitory hormone in the flatfish, Solea senegalensis: Molecular cloning, brain localization and physiological effects

Immunocytochemical identification and distribution of the cell types in the pituitary gland of &lt;i&gt;Bagrus bayad&lt;/i&gt; (&lt;i&gt;Teleostei, Bagridae&lt;/i&gt;)

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Immunocytochemical identification and distribution of the cell types in the pituitary gland of <i>Bagrus bayad</i> (<i>Teleostei, Bagridae</i>)