Early development of the pituitary gland in Acipenser naccarii (Chondrostei, Acipenseriformes): an immunocytochemical study.
Identifieur interne : 000119 ( Ncbi/Merge ); précédent : 000118; suivant : 000120Early development of the pituitary gland in Acipenser naccarii (Chondrostei, Acipenseriformes): an immunocytochemical study.
Auteurs : G. Grandi [Italie] ; M. ChiccaSource :
- Anatomy and embryology [ 0340-2061 ] ; 2004.
English descriptors
- KwdEn :
- Adrenocorticotropic Hormone (metabolism), Age Factors, Animals, Female, Fishes (embryology), Fishes (physiology), Growth Hormone (metabolism), Immunohistochemistry, Larva (cytology), Larva (metabolism), Male, Melanocyte-Stimulating Hormones (metabolism), Organogenesis (physiology), Pituitary Gland (cytology), Pituitary Gland (embryology), Pituitary Gland (secretion), Pituitary Gland, Anterior (cytology), Pituitary Gland, Anterior (embryology), Pituitary Gland, Anterior (secretion), Pituitary Gland, Posterior (cytology), Pituitary Gland, Posterior (embryology), Pituitary Gland, Posterior (secretion), Prolactin (metabolism), Thyrotropin (metabolism).
- MESH :
- chemical , metabolism : Adrenocorticotropic Hormone, Growth Hormone, Melanocyte-Stimulating Hormones, Prolactin, Thyrotropin.
- cytology : Larva, Pituitary Gland, Pituitary Gland, Anterior, Pituitary Gland, Posterior.
- embryology : Fishes, Pituitary Gland, Pituitary Gland, Anterior, Pituitary Gland, Posterior.
- metabolism : Larva.
- physiology : Fishes, Organogenesis.
- secretion : Pituitary Gland, Pituitary Gland, Anterior, Pituitary Gland, Posterior.
- Age Factors, Animals, Female, Immunohistochemistry, Male.
Abstract
The distribution and appearance of secretory cells in the pituitary gland were investigated for the first time in a chondrostean species, Acipenser naccarii, from embryos to juveniles, by immunohistochemistry with mammalian and teleost hormone antisera. On 5.5 day post-fertilization (2.5 days pre-hatching), the pituitary of embryos appears as an oval cell mass with a narrow central cavity (hypophysial cleft), close to the ventral border of diencephalon under the third ventricle. At that time no neurohypophysis is observed, the adenohypophysis is not yet structurally divided into pars intermedia (PI) and pars distalis (PD) and only immunoreactive growth hormone cells are detectable. Seven days post-fertilization (1 day pre-hatching) the immunoreactive thyrotropic cells appear in the ventral region and the immunoreactive adrenocorticotropic cells in the posterior dorsal one. At hatching, some immunoreactive melanotropic (ir-MSH) cells are visible in the posterior dorsal region and some immunoreactive prolactin cells in the anterior one. Eight days later the immunoreactive somatolactin cells appear along the posterior dorsal border and the immunoreactive gonadotropic I (ir-GtH I) cells in the ventral region. Here, a few ir-GtH II cells finally appear in 76-86 day old juveniles. The gland elongates after hatching and in 8-day-old larvae two adenohypophysial regions are identified: a posterior (the presumptive PI) and an anterior one (the presumptive PD). In 156-166-day-old juveniles three regions (rostral and proximal pars distalis and pars intermedia) appear and a high number of ir-MSH cells are visible in the rostral region. The first protrusion of neurohypophysis into adenohypophysis is observed in 76-86-day-old juveniles and increases with age, branching into PI. The rostro-caudal distribution of the immunoreactive cells follows the spatial expression of the corresponding hormone gene families observed in zebra fish, suggesting similar differentiating mechanisms in teleosts and chondrosteans.
DOI: 10.1007/s00429-004-0402-5
PubMed: 15235908
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pubmed:15235908Le document en format XML
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<affiliation wicri:level="1"><nlm:affiliation>Department of Biology, University of Ferrara, via L. Borsari 46, Ferrara, Italy. gbg@unife.it</nlm:affiliation>
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<affiliation wicri:level="1"><nlm:affiliation>Department of Biology, University of Ferrara, via L. Borsari 46, Ferrara, Italy. gbg@unife.it</nlm:affiliation>
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<term>Age Factors</term>
<term>Animals</term>
<term>Female</term>
<term>Fishes (embryology)</term>
<term>Fishes (physiology)</term>
<term>Growth Hormone (metabolism)</term>
<term>Immunohistochemistry</term>
<term>Larva (cytology)</term>
<term>Larva (metabolism)</term>
<term>Male</term>
<term>Melanocyte-Stimulating Hormones (metabolism)</term>
<term>Organogenesis (physiology)</term>
<term>Pituitary Gland (cytology)</term>
<term>Pituitary Gland (embryology)</term>
<term>Pituitary Gland (secretion)</term>
<term>Pituitary Gland, Anterior (cytology)</term>
<term>Pituitary Gland, Anterior (embryology)</term>
<term>Pituitary Gland, Anterior (secretion)</term>
<term>Pituitary Gland, Posterior (cytology)</term>
<term>Pituitary Gland, Posterior (embryology)</term>
<term>Pituitary Gland, Posterior (secretion)</term>
<term>Prolactin (metabolism)</term>
<term>Thyrotropin (metabolism)</term>
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<keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Adrenocorticotropic Hormone</term>
<term>Growth Hormone</term>
<term>Melanocyte-Stimulating Hormones</term>
<term>Prolactin</term>
<term>Thyrotropin</term>
</keywords>
<keywords scheme="MESH" qualifier="cytology" xml:lang="en"><term>Larva</term>
<term>Pituitary Gland</term>
<term>Pituitary Gland, Anterior</term>
<term>Pituitary Gland, Posterior</term>
</keywords>
<keywords scheme="MESH" qualifier="embryology" xml:lang="en"><term>Fishes</term>
<term>Pituitary Gland</term>
<term>Pituitary Gland, Anterior</term>
<term>Pituitary Gland, Posterior</term>
</keywords>
<keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Larva</term>
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<keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Fishes</term>
<term>Organogenesis</term>
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<keywords scheme="MESH" qualifier="secretion" xml:lang="en"><term>Pituitary Gland</term>
<term>Pituitary Gland, Anterior</term>
<term>Pituitary Gland, Posterior</term>
</keywords>
<keywords scheme="MESH" xml:lang="en"><term>Age Factors</term>
<term>Animals</term>
<term>Female</term>
<term>Immunohistochemistry</term>
<term>Male</term>
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<front><div type="abstract" xml:lang="en">The distribution and appearance of secretory cells in the pituitary gland were investigated for the first time in a chondrostean species, Acipenser naccarii, from embryos to juveniles, by immunohistochemistry with mammalian and teleost hormone antisera. On 5.5 day post-fertilization (2.5 days pre-hatching), the pituitary of embryos appears as an oval cell mass with a narrow central cavity (hypophysial cleft), close to the ventral border of diencephalon under the third ventricle. At that time no neurohypophysis is observed, the adenohypophysis is not yet structurally divided into pars intermedia (PI) and pars distalis (PD) and only immunoreactive growth hormone cells are detectable. Seven days post-fertilization (1 day pre-hatching) the immunoreactive thyrotropic cells appear in the ventral region and the immunoreactive adrenocorticotropic cells in the posterior dorsal one. At hatching, some immunoreactive melanotropic (ir-MSH) cells are visible in the posterior dorsal region and some immunoreactive prolactin cells in the anterior one. Eight days later the immunoreactive somatolactin cells appear along the posterior dorsal border and the immunoreactive gonadotropic I (ir-GtH I) cells in the ventral region. Here, a few ir-GtH II cells finally appear in 76-86 day old juveniles. The gland elongates after hatching and in 8-day-old larvae two adenohypophysial regions are identified: a posterior (the presumptive PI) and an anterior one (the presumptive PD). In 156-166-day-old juveniles three regions (rostral and proximal pars distalis and pars intermedia) appear and a high number of ir-MSH cells are visible in the rostral region. The first protrusion of neurohypophysis into adenohypophysis is observed in 76-86-day-old juveniles and increases with age, branching into PI. The rostro-caudal distribution of the immunoreactive cells follows the spatial expression of the corresponding hormone gene families observed in zebra fish, suggesting similar differentiating mechanisms in teleosts and chondrosteans.</div>
</front>
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<Abstract><AbstractText>The distribution and appearance of secretory cells in the pituitary gland were investigated for the first time in a chondrostean species, Acipenser naccarii, from embryos to juveniles, by immunohistochemistry with mammalian and teleost hormone antisera. On 5.5 day post-fertilization (2.5 days pre-hatching), the pituitary of embryos appears as an oval cell mass with a narrow central cavity (hypophysial cleft), close to the ventral border of diencephalon under the third ventricle. At that time no neurohypophysis is observed, the adenohypophysis is not yet structurally divided into pars intermedia (PI) and pars distalis (PD) and only immunoreactive growth hormone cells are detectable. Seven days post-fertilization (1 day pre-hatching) the immunoreactive thyrotropic cells appear in the ventral region and the immunoreactive adrenocorticotropic cells in the posterior dorsal one. At hatching, some immunoreactive melanotropic (ir-MSH) cells are visible in the posterior dorsal region and some immunoreactive prolactin cells in the anterior one. Eight days later the immunoreactive somatolactin cells appear along the posterior dorsal border and the immunoreactive gonadotropic I (ir-GtH I) cells in the ventral region. Here, a few ir-GtH II cells finally appear in 76-86 day old juveniles. The gland elongates after hatching and in 8-day-old larvae two adenohypophysial regions are identified: a posterior (the presumptive PI) and an anterior one (the presumptive PD). In 156-166-day-old juveniles three regions (rostral and proximal pars distalis and pars intermedia) appear and a high number of ir-MSH cells are visible in the rostral region. The first protrusion of neurohypophysis into adenohypophysis is observed in 76-86-day-old juveniles and increases with age, branching into PI. The rostro-caudal distribution of the immunoreactive cells follows the spatial expression of the corresponding hormone gene families observed in zebra fish, suggesting similar differentiating mechanisms in teleosts and chondrosteans.</AbstractText>
<CopyrightInformation>Copyright 2004 Springer-Verlag</CopyrightInformation>
</Abstract>
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