Description de l'hypophyse du lézard saharien Uromastix acanthinurus bell 1825 (Sauria agamidae): Localisation par immunofluorescence de quelques hormones hypophysaires

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Résumé

L'hypophyse du lézard saharien Uromastix acanthinurus est comparable à celle des autres Agamidae. Le lobe intermédiaire est très développé. Le lobe distal allongé s'avance sous l'éminence médiane; il comprend une région rostrale et une région caudale (les 23 du lobe). Grâce à la technique d'immunofluorescence indirecte, nous avons mis en évidence dans la région rostrale de la pars distalis des cellules “prolactin-like,” des cellules “ACTH-like” et des cellules gonadotropes. On retrouve ces dernières, dispersées et isolées, dans la région caudale, où l'on rencontre aussi des cellules “STH-like” et de nombreuses cellules dégranulées.

Abstract

The pituitary of the saharian lizard Uromastix acanthinurus looks like those of other Agamidae. The pars intermedia is well developed. The elongated pars distalis is situated under the median eminence; it includes the rostral and caudal regions (two-thirds of the lobe). In the rostral region, the cytoimmunofluorescence technique has enabled us to reveal LTH-like cells, ACTH-like cells, and gonadotropin-producing cells. The latter are also revealed scattered in the caudal region where we find STH-like cells and numerous degranulated cells, also.

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