Seasonal Changes in Plasma Growth Hormone and Prolactin Concentrations of the Frog Rana esculenta

G. Mosconi, K. Yamamoto, O. Carnevali, M. Nabissi, A. Polzonetti-Magni, S. Kikuyama

    Research output: Contribution to journalArticle

    23 Citations (Scopus)

    Abstract

    Plasma growth hormone (G/D, prolactin (PRL), and vitellogenin (VTG) concentrations were determined during the annual reproductive cycle of the frog Rana esculenta. Plasma GH and PRL were measured using a RIA that employed purified bullfrog (Rana catesbeiana) GH and PRL as standards and radioligand, and their respective antibodies. Using ELISA, plasma VTG titers were related to ovarian weight. GH, PRL, and VTG displayed different trends related to season and sex. In male frogs the GH and PRL trends have been found parallel, showing the highest concentrations (35 and 85 ng/ml, respectively) during the winter months. In the female frogs, the GH trend behaved differently from that in males; in fact, plasma GH changed during the annual reproductive cycle, showing two main peaks occurring during the reproductive period and the autumn ovarian recrudescence that are well correlated with the vitellogenesis as well as with the main changes in ovarian weight.

    Original languageEnglish
    Pages (from-to)380-387
    Number of pages8
    JournalGeneral and Comparative Endocrinology
    Volume93
    Issue number3
    DOIs
    Publication statusPublished - 1994 Mar

    Fingerprint

    Rana esculenta
    prolactin
    Anura
    Prolactin
    somatotropin
    Growth Hormone
    frogs
    Vitellogenins
    vitellogenin
    Rana catesbeiana
    Vitellogenesis
    Weights and Measures
    Lithobates catesbeianus
    vitellogenesis
    Reproduction
    Enzyme-Linked Immunosorbent Assay
    enzyme-linked immunosorbent assay
    autumn
    Recurrence
    antibodies

    ASJC Scopus subject areas

    • Endocrinology

    Cite this

    Mosconi, G., Yamamoto, K., Carnevali, O., Nabissi, M., Polzonetti-Magni, A., & Kikuyama, S. (1994). Seasonal Changes in Plasma Growth Hormone and Prolactin Concentrations of the Frog Rana esculenta. General and Comparative Endocrinology, 93(3), 380-387. https://doi.org/10.1006/gcen.1994.1042

    Seasonal Changes in Plasma Growth Hormone and Prolactin Concentrations of the Frog Rana esculenta. / Mosconi, G.; Yamamoto, K.; Carnevali, O.; Nabissi, M.; Polzonetti-Magni, A.; Kikuyama, S.

    In: General and Comparative Endocrinology, Vol. 93, No. 3, 03.1994, p. 380-387.

    Research output: Contribution to journalArticle

    Mosconi, G, Yamamoto, K, Carnevali, O, Nabissi, M, Polzonetti-Magni, A & Kikuyama, S 1994, 'Seasonal Changes in Plasma Growth Hormone and Prolactin Concentrations of the Frog Rana esculenta', General and Comparative Endocrinology, vol. 93, no. 3, pp. 380-387. https://doi.org/10.1006/gcen.1994.1042
    Mosconi, G. ; Yamamoto, K. ; Carnevali, O. ; Nabissi, M. ; Polzonetti-Magni, A. ; Kikuyama, S. / Seasonal Changes in Plasma Growth Hormone and Prolactin Concentrations of the Frog Rana esculenta. In: General and Comparative Endocrinology. 1994 ; Vol. 93, No. 3. pp. 380-387.
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