Electron microscopic immunocytochemical demonstration of separate vasotocinergic and mesotocinergic nerve fibres in the median eminence of the frog hypophysis |
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Authors: | Prof Dr J van Vossel-Daeninck K Dierickx A van Vossel F Vandesande |
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Institution: | (1) Department of Embryology and Comparative Histology, Rijksuniversiteit, Gent, Belgium;(2) Laboratorium voor Embryologie en Vergelijkende Histologie, Rijksuniversiteit, Godshuizenlaan, 4, B-9000 Gent, Belgium |
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Abstract: | Summary With the use of the unlabelled antibody peroxidase-antiperoxidase complex (PAP) technique at the electron microscopic level, it was shown that both the internal and the external regions of the median eminence of the frog contain separate vasotocinergic and mesotocinergic nerve fibres. This observation confirms the results of previous immunocytochemical studies at the light microscopic level. The mean size of the neurohypophysial hormone-containing granules in the external region of the median eminence is significantly smaller than that of the neurohypophysial hormone-containing granules in the internal region of the median eminence. No significant difference could be found between the mean granule size of the vasotocinergic and mesotocinergic fibres of either the internal or the external region of the frog median eminence.This investigation was supported by a grant from the Belgian Nationaal Fonds voor Geneeskundig Wetenschappelijk Onderzoek |
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Keywords: | Median eminence Hypophysis Rana temporaria Vasotocinergic fibres Mesotocinergic fibres Immunocytochemistry Electron microscopy |
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