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Presence and release of immunoreactive atrial natriuretic peptide (ANP) in Bufo arenarum spermatozoa after HCG treatment
Paz, Dante A; Ruiz, Gabriela; Casco, Victor H; Pisanó, Armando.
  • Paz, Dante A; CONICET. Laboratorio de Investigaciones Embriológicas. Buenos Aires. AR
  • Ruiz, Gabriela; CONICET. Laboratorio de Investigaciones Embriológicas. Buenos Aires. AR
  • Casco, Victor H; Universidad Nacional de Entre Ríos. Facultad de Bioingeniería. Departamento de Microscopía Electrónica. AR
  • Pisanó, Armando; CONICET. Laboratorio de Investigaciones Embriológicas. Buenos Aires. AR
Biocell ; 20(1): 47-54, Apr. 1996.
Article in English | LILACS | ID: lil-336006
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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Index: LILACS (Americas) Main subject: Spermatozoa / Atrial Natriuretic Factor / Chorionic Gonadotropin Limits: Animals Language: English Journal: Biocell Journal subject: C‚lulas Year: 1996 Type: Article Affiliation country: Argentina Institution/Affiliation country: CONICET/AR / Universidad Nacional de Entre Ríos/AR

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Index: LILACS (Americas) Main subject: Spermatozoa / Atrial Natriuretic Factor / Chorionic Gonadotropin Limits: Animals Language: English Journal: Biocell Journal subject: C‚lulas Year: 1996 Type: Article Affiliation country: Argentina Institution/Affiliation country: CONICET/AR / Universidad Nacional de Entre Ríos/AR