Immunohistochemical detection of ACTH and MSH cells in the hypophysis of the hermaphroditic teleost, Diplodus sargus.
Eur J Histochem
; 44(4): 397-406, 2000.
Article
em En
| MEDLINE
| ID: mdl-11214865
Hypophyseal ACTH and MSH cells were immunohistochemically characterised in the teleost fish, Diplodus sargus, using anti-ACTH (1-24) and anti alpha-MSH polyclonal antisera. ACTH cells were found both in the pars distalis and in the pars intermedia. In the former region, they appeared small, round-shaped and clustered; in the latter, they were either small or large and elongated. Moreover, a few ACTH-immunoreactive cells resembling microglia were present in the neurohypophysis. Conversely, MSH cells were found only in the pars intermedia, and were similar to the larger ACTH cells of the same region. In the pars intermedia, co-localisation of ACTH and MSH immunoreactivity in the same cell was revealed by double immunostaining, though the two hormones were also observed in distinct cell types. The distribution of ACTH cells appeared quite uniform, without any marked difference between the specimens tested. Conversely, MSH cell amount varied according to the stage of the sexual cycle of this teleost fish, which is characterised by protandrous hermaphroditism. In fact, a lower amount of MSH cells were observed in females, whereas no significant difference was found between immature and male specimens.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Hipófise
/
Perciformes
/
Hormônios Estimuladores de Melanócitos
/
Hormônio Adrenocorticotrópico
Tipo de estudo:
Diagnostic_studies
Limite:
Animals
Idioma:
En
Revista:
Eur J Histochem
Assunto da revista:
HISTOCITOQUIMICA
Ano de publicação:
2000
Tipo de documento:
Article
País de afiliação:
Itália