- Estrogènes et Reproduction chez le Måle
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œstrogènes et contrôle de la prolifération germinale
Estrogens and germ cell regulation
Andrologie volume 13, pages 28–33 (2003)
Resume
L’examen des souris invalidées pour les gènes de l’aromatase ou des récepteurs des estrogènes, les données cliniques d’insuffisance estrogénique primitive chez l’homme par mutation de ces mêmes gènes, les conséquences de l’exposition pré-natale au distilbène*, un estrogène puissant prescrit aux femmes enceintes entre les années 50 et 70, et les données récentes sur les mécanismes d’action des estrogènes, invitent à réévaluer totalement le rôle des hormones stéroïdes dites “féminines” dans la physiologie de la reproduction masculine. Il apparaît ainsi vraisemblable qu’une balance androgènes/estrogène appropriée soit nécessaire à la fois au cours de la différentiation sexuelle, à la descente testiculaire, à la préparation périnatale de la spermatogenèse et à son plein développement à l’âge adulte, ainsi qu’à la maturation des spermatozoïdes d’autant que le testicule exprime à la fois l’aromatase et les récepteurs REα et REβ. Ces différents éléments rendent plausibles l’hypothèse du rôle des perturbateurs endocriniens environnementaux de type xénoestrogènes dans la baisse de la fertilité masculine, l’augmentation des malformations des organes génitaux et du cancer du testicule, et justifient les essais de validation scientifique. Mais les mécanismes d’action précis des estrogènes dans la physiologie de la reproduction masculine et ses perturbations restent encore très imparfaitement caractérisés.
Abstract
The role of so-called female sex steroids in males needs to be completely re-evaluated in the light of the clinical features of male estrogen deficiency, new mechanisms of estrogen receptors, and description of mice lacking functional aromatase or estrogen receptor gene. An appropriate balance between estrogens and androgens appears to be necessary to allow full sexual development and reproduction. All these characteristics support the hypothesis of the role of endocrine disruptors and justify investigation of the possible role of environmental xenoestrogens on male fertility, genital malformations or cancer.
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Fenichel, P. œstrogènes et contrôle de la prolifération germinale. Androl. 13, 28–33 (2003). https://doi.org/10.1007/BF03034406
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DOI: https://doi.org/10.1007/BF03034406