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[Inhibin and cybernins].

C Lefaucheur, J Gueris, J M Segrestaa

    Pathologie-Biologie
    |October 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

    Inhibin and cybernins are gonadal peptide hormones that regulate reproductive functions. These hormones, including inhibin, oocyte maturation inhibitor, and gonadocrinins, offer new therapeutic avenues for contraception and sterility.

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    Area of Science:

    • Reproductive Endocrinology
    • Molecular Endocrinology
    • Hormone Research

    Background:

    • Inhibin is a key gonadal peptide hormone primarily regulating Follicle-Stimulating Hormone (FSH) secretion and synthesis.
    • Current research relies on bioassays due to incomplete inhibin purification, with secretion influenced by androgens and FSH.
    • Inhibin plays a crucial role in controlling female folliculogenesis through FSH fluctuations.

    Purpose of the Study:

    • To explore the role of inhibin and other ovarian peptide hormones (cybernins) in reproductive processes.
    • To investigate the mechanisms by which these peptides modulate the effects of gonadotrophins.
    • To highlight the potential therapeutic applications of these discoveries in contraception and sterility.

    Main Methods:

    • Utilized bioassays with testicular extracts and follicular fluid for inhibin assessment.

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  • Investigated the secretion patterns of inhibin by granulosa and Sertoli cells.
  • Identified and characterized five ovarian peptidic substances (cybernins) with specific inhibitory functions.

    • Main Results:

    • Demonstrated inhibin's preferential suppression of FSH secretion and synthesis.
    • Identified five cybernins: oocyte maturation inhibitor, luteinization inhibitor, FSH binding inhibitor, LH receptor binding inhibitor, and gonadocrinins.
    • Established the involvement of FSH binding inhibitor in follicular atresia and LH receptor binding inhibitor in luteolysis.

    Conclusions:

    • The discovery of ovarian peptides (cybernins) provides novel insights into folliculogenesis and luteolysis.
    • These peptide hormones modulate ovarian functions and gonadotrophin activity.
    • Further research into inhibin and cybernins may lead to innovative therapeutic strategies for reproductive health, including contraception and sterility treatments.