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- W2039432852 abstract "Abstract The initial appearance of tyrosine hydroxylase (TH)‐, serotonin (5‐HT)‐, gamma‐aminobutyric acid (GABA)‐, calcitonin gene‐related peptide‐ (CGRP), substance P‐, and synaptophysin‐immunoreactivity in the rat pituitary gland, and in the related brain regions was investigated. Several groups of TH‐immunoreactive neurons were first detected in the brain stem on day E17, and in the hypothalamus on day E18, followed by TH‐immunoreactivity in the median eminence and infundibulum on E19–E20. TH‐positive fibers appeared in the posterior lobe on day E20 and in the intermediate lobe on day P0. 5‐HT‐immunoreactivity was first detected on day E17 in neurons and nerve fibers in the brain stem and in the median eminence, respectively. On day E18, a few 5‐HT‐immunoreactive fibers were detected in the posterior lobe of the pituitary, although they were consistently seen in the infundibulum from day E19. In newborn rats, some 5‐HT‐immunoreactive fibers, but no neurons, were seen in the hypothalamus. GABA immunoreactivity appeared on day E17 in several nerve fibers of the infundibulum and the posterior lobe. Some neurons in the cortex and ventral hypothalamus transiently expressed GABA immunoreactivity on day E17. In newborn rats, a plexus of GABA‐immunoreactive fibers was detected for the first time in the intermediate lobe. No CGRP‐immunoreactive fibers could be detected in the prenatal pituitary. On day P10, CGRP‐immunoreactive fibers were first observed in the anterior lobe. Later their number considerably increased, while only sporadic fibers could be found in the intermediate or posterior lobes. No substance P‐immunoreactivity could be detected in any of the lobes in the embryonic or developing postnatal rat pituitary, instead the adult anterior lobe occasionally showed some substance P‐immunoreactive fibers. Synaptophysin‐immunoreactivity was first detected in the posterior lobe on day E20, followed shortly by its expression in the intermediate lobe in newborn rats. The time course of GABA and 5‐HT expression revealed in the present study suggests that these transmitters, which are initially expressed in the developing pituitary clearly before synaptic maturation, may act as trophic molecules during the prenatal period." @default.
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- W2039432852 date "1998-10-01" @default.
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- W2039432852 title "The ontogenic appearance of tyrosine hydroxylase‐, serotonin‐, gamma‐aminobutyric acid‐, calcitonin gene‐related peptide‐, substance P‐, and synaptophysin‐immunoreactivity in rat pituitary gland" @default.
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- W2039432852 doi "https://doi.org/10.1016/s0736-5748(98)00052-5" @default.
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