Somatotrophs and lactotrophs in the anterior pituitary of fetal and neonatal rats |
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Authors: | Hemming F J Dubois M P Dubois P M |
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Institution: | (1) Faculté de Médecine Lyon-Sud, CNRS UA 559, Laboratoire d'Histologie-Embryologie, Oullins, France;(2) Station de Physiologie de la Reproduction, INRA, Nouzilly, France;(3) Faculté de Médecine Lyon-Sud, CNRS UA 559, Laboratoire d'Histologie-Embryologie, B.P. 12, F-69600 Oullins, France |
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Abstract: | Summary The ultrastructure of immunoreactive somatotrophs and lactotrophs in pituitaries of fetal rats at 19, 20 and 21 days of gestation and on the day of birth was studied. Somatotrophs, first detectable at 19 days of gestation, undergo only minor modifications before reaching the structure described for adults. In particular there is an increase in the endoplasmic reticulum and Golgi apparatus. Lactotrophs, first identifiable in newborn rats, are very different in ultrastructure from adult cells, because the secretory granules are generally small, but variable in shape and size, and the Golgi complex is prominent. |
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Keywords: | Anterior pituitary Somatotroph Lactotroph Ultrastructure Immunocytochemistry Fetal and neonatal rat |
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