Summary
By means of cytological and cytochemical methods the authors were able to demonstrate five cell types in the hypophysis of Triturus cristatus carnifex. Two acidophil (I and II) and three basophil (I, II, III) cell types are encountered. These five cell types are distributed over the three areas into which the hypophysis is usually subdivided. The same cell types, distributed in exactly the same way, are observed in Salamandra atra. Because of cytologie variations observed under different experimental conditions (castration, thyroidectomy, administration of thiouracils, cortisol, aldosterone, metopirone, and prolactine) it is supposed that type I basophil cells produce the thyreotropic hormone, while type II cells produce FSH and type III cells produce LH. As for the acidophil cells, type I cells seem to produce ACTH while type II cells seem to produce one or possibly two hormonal agents, which exert a somatotropic and prolactinic action.
Résumé
Faisant appel à des techniques cytologiques et cytochemiques, les auteurs décrivent les cinq types de cellules qu'ils ont observés dans l'hypophyse de Triturus cristatus carnifex; deux de ces types sont acidophiles (I et II), les trois autres basophiles (I, II, III). Ces cinq types de cellules sont répartis, par tendance, dans les trois zones suivant lesquelles on peut subdiviser l'hypophyse. On observe les mêmes types de cellules distribuées de la même façon chez Salamandra atra. Se basant sur les variations d'ordre cytologique qu'ils ont observées à la suite de traitements experimentaux différents (castration, thyroïdectomie, administration de substances thiouréiques, de cortisole, d'aldostérone, de métopirone et de prolaetine), les auteurs supposent que les cellules basophiles du Ier type sont chargées d'élaborer l'hormone thyréotrope, celles du IIème type l'FSH, celles du IIIème type l'LH; quant aux cellules acidophiles, celles du Ier type élaboreraient l'ACTH, et celles du IIème type un agent hormonal (ou peut-être deux agents) qui exercerait une action somatotrope et une action du type prolactique.
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Recherche conduite et publiée avec une contribution de ≪l'Impresa di Endocrinologia≫ du ≪Consiglio Nazionale delle Ricerche (Gruppo di Endocrinologia Comparata)≫. — Nous tenons à remercier ici M. Giuseppe Gendusa qui a bien voulu colaborer à la preparation du matériel photographique.
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Mazzi, V., Peyrot, A., Anzalone, M.R. et al. L'histophysiologie de l'adénohypophyse du triton crêté (Triturus cristatus carnifex Laur.). Zeitschrift für Zellforschung 72, 597–617 (1966). https://doi.org/10.1007/BF00319263
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DOI: https://doi.org/10.1007/BF00319263