Presence and release of immunoreactive atrial natriuretic peptide (ANP) in Bufo arenarum spermatozoa after HCG treatment
Biocell
; 20(1): 47-54, Apr. 1996.
Article
em En
| LILACS
| ID: lil-336006
Biblioteca responsável:
BR1.1
ABSTRACT
Atrial natriuretic peptide (ANP)-like immunoreactivity has been demonstrated in mature spermatozoa of Bufo arenarum. However, after spermiation induced by Gonadotropin Releasing Hormone (GnRH), no ANP immunoreactivity was detected in testicular spermatozoa. Recently, the presence of GnRH and GnRH receptors in amphibian testes has been demonstrated. To clarify if the loss of ANP-like immunoreactivity in spermatozoa is a direct effect of GnRH or pituitary gonadotropins, a study on Bufo arenarum adult males, has been performed. The in vivo treatment with Human Chorionic Gonadotropin (HCG) induced spermiation and loss of ANP-like immunoreactivity. The in vitro treatment with HCG showed the same results. However, in vitro GnRH treatment failed to cause spermiation and loss of ANP-like immunoreactivity. The present results indicate that ANP from mature spermatozoa is regulated via gonadotropic hormones and may be involved in the spermiation process.
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Índice:
LILACS
Assunto principal:
Espermatozoides
/
Fator Natriurético Atrial
/
Gonadotropina Coriônica
Limite:
Animals
Idioma:
En
Revista:
Biocell
Assunto da revista:
Clulas
Ano de publicação:
1996
Tipo de documento:
Article