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https://doi.org/10.1016/s0006-8993(99)02098-3
Copy DOIJournal: Brain Research | Publication Date: Dec 1, 1999 |
Citations: 33 |
In situ hybridization with a P 33-labelled cDNA probe was used to analyze the effects of castration and replacement therapy by testosterone on the number of neurons expressing vasotocin mRNA in the male quail brain. Castration completely eliminated neurons expressing vasotocin mRNA in the previously described parvocellular vasotocin cell groups, located in the medial preoptic nucleus and in the anterior and posterior part of the medial subdivision of the bed nucleus of the stria terminalis. These effects were completely reversed by a 3-week treatment with exogenous testosterone. No marked change in vasotocin expression could be detected in the magnocellular cell groups located in the paraventricular and supraoptic nuclei. These data indicate that the testosterone-induced changes in the vasotocinergic innervation of the quail medial preoptic region and bed nucleus of the stria terminalis result from controlling mechanisms at the pretranslational, presumably transcriptional level. These control mechanisms are therefore very similar to those described for the rat brain despite the existence of major differences in the neuroanatomical organization of this peptidergic system in the two species.
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