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  • 17,20α-dihydroxy-4-pregnen-3-one  (1)
  • ACTH cells  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 151 (1974), S. 481-487 
    ISSN: 1432-0878
    Keywords: ACTH cells ; Salmo gairdneri ; Secretory products ; Release in vitro
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary During organ culture of the pituitary of Salmo gairdneri, the secretory granules of the ACTH cell migrate to the distal pole of the cell where they persist even over prolonged periods of culture. Electron microscope studies suggest that the granule contents are released from the cell and that the accumulated material is extracellular. Immunofluorescent studies demonstrate immunoreactive ACTH within the cell cytoplasm but none or little associated with the accumulated extracellular material. A dissociation between ACTH and the granule “matrix” at about the time of granule release is proposed.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-5168
    Keywords: goldfish ; Carassius auratus ; testis ; sulfates ; 11-deoxycortisol ; 11-ketotestosterone ; corticosteroids ; 17,20α-dihydroxy-4-pregnen-3-one
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Des testicules de poissons rouges en cours de spermiation ont été incubés avec de la [3H]17-hydroxyprogestérone. L'androsténédione, l'androstènetrione, la 11β-hydroxyandrosténédione, la 11-cétotestostérone, la 17,20α-dihydroxy-4-pregnen-3-one (17,20αP) et le 11-déoxycortisol, ont été identifiés comme composés majeurs parmi les stéroîdes non conjugués. La testostérone est présente essentiellement sous forme de glucuronide, mais son taux de synthèse reste faible (1–3%). Les composés sulfatés prédominants sont la 17,20αP et le déoxycortisol. La cortisone, produite à un taux faible (〈 2,5%), a été identifiée aussi bien sous forme libre que sulfatée. C'est la première démonstration d'une biosynthèse de corticostéroîde par un testicule de poisson téléostéen. Du fait des taux élevés de synthèse de la 17,20αP, du deoxycortisol, et de leurs sulfates, leur rôles potentiels, en relation avec la spermiation du poisson rouge, mériteraient d'être davantage explorés.
    Notes: Abstract Testes from spermiating goldfish were incubated with [3H]17-hydroxyprogesterone. The major products in the unconjugated fraction were identified as androstenedione, androstenetrione, 11-β-hydroxyandrostenedione, 11-ketotestosterone, 17,20α-dihydroxy-4-pregnen-3-one (17,20αP) and 11-deoxycortisol. Testosterone was present predominantly in the glucuronide fraction, but yields were low (1–3%). The major components of the sulfate fraction were 17,20αP and 11-deoxycortisol. The identification of cortisone in low yield (〈 2.5010) in both the free and sulfate fractions is the first report of corticosteroid biosynthesis by a teleost testis. The high yields of 17,20αP and 11-deoxycortisol and their sulphates suggests that their possible role in spermiation of the goldfish should be further investigated.
    Type of Medium: Electronic Resource
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