The Source of Transitory Innervation of Suprachiasmatic Nucleus by Tyrosine Hydroxylase-Immunoreactive Fibers during Postnatal Period in Rats

The Source of Transitory Innervation of Suprachiasmatic Nucleus by Tyrosine... Suprachiasmatic nucleus in the rats during early postnatal development is transitorily innervated by tyrosine hydroxylase-immunoreactive fibers that are neither catecholamine- nor serotoninergic. The goal of this immunocytochemical investigation was to find out if tyrosine hydroxylase-immunoreactive neurons of anterior hypothalamus could be the source of this innervation. According to the obtained immunocytochemical data, multiple multipolar tyrosine hydroxylase-immunoreactive neurons are localized around the suprachiasmatic nucleus in the rats at days 2 and 10 of postnatal development. Most of them were observed ventrally and laterally to the nucleus. The axons of the neurons are oriented towards the suprachiasmatic nucleus. Further investigation demonstrated considerably decreased number of tyrosine hydroxylase-immunoreactive neurons surrounding the suprachiasmatic nucleus in the adult animals as compared to early postnatal period, which correlates to the number of tyrosine hydroxylase-immunoreactive fibers in this nucleus. Hence, tyrosine hydroxylase-immunoreactive neurons in the ventral region of anterior hypothalamus can be considered as a potential source of transitory innervation of suprachiasmatic nucleus by tyrosine hydroxylase-immunoreactive fibers during early postnatal development. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Developmental Biology Springer Journals

The Source of Transitory Innervation of Suprachiasmatic Nucleus by Tyrosine Hydroxylase-Immunoreactive Fibers during Postnatal Period in Rats

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Publisher
Kluwer Academic Publishers-Plenum Publishers
Copyright
Copyright © 2002 by MAIK “Nauka/Interperiodica”
Subject
Life Sciences; Animal Anatomy / Morphology / Histology
ISSN
1062-3604
eISSN
1608-3326
D.O.I.
10.1023/A:1015670807782
Publisher site
See Article on Publisher Site

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