UNIGE document Scientific Article
previous document  unige:74773  next document
add to browser collection
Title

Immunoreactivity to vasoactive intestinal polypeptide (VIP) and thyreotropin-releasing hormone (TRH) in hypothalamic neurons of the domesticated pigeon (Columba livia). Alterations following lactation and exposure to cold

Authors
Péczely, P
Published in Cell and Tissue Research. 1988, vol. 251, no. 2, p. 485-94
Abstract The distribution of VIP- and TRH-immunoreactivity in neurons and processes within the hypothalamus of the pigeon was investigated with light-microscopic immunocytochemical techniques. Most of the VIP-containing neurons are concentrated in the middle and caudal parts of the hypothalamus, with the greatest concentration of perikarya occurring in the medial and lateral part of the ventromedial hypothalamic nucleus and the infundibular nucleus. These cells give rise to axons that seem to extend into the median eminence. An extensive network of VIP-immunoreactive fibers and varicosities occupy the external layer of the median eminence. The majority of TRH-containing neurons is found in the anterior hypothalamus with the greatest concentration of cells in the magnocellular preoptic, medial preoptic, suprachiasmatic and paraventricular nuclei. TRH-immunoreactive fibers and varicosities form a dense arborization in the external layer of the median eminence. Lactation seems to induce substantial changes in VIP as well as in TRH-immunostaining in the median eminence and other hypothalamic regions as compared to control, sexually active animals. Furthermore, TRH-immunoreactivity decreased in the median eminence following 60-min exposure to cold. These results suggest that VIP- and TRH-containing pathways in the pigeon hypothalamus are involved in the mediation of neuroendocrine responses.
Keywords AnimalsCold TemperatureColumbidae/metabolism/physiologyFemaleHypothalamus/cytology/metabolism/physiologyImmunohistochemistryLactationMalePregnancyThyrotropin-Releasing Hormone/metabolism/physiologyVasoactive Intestinal Peptide/metabolism/physiology
Identifiers
PMID: 3125979
Full text
This document has no fulltext available yet, but you can contact its author by using the form below.
Structures
Research group Progéniteurs neuronaux (141)
Citation
(ISO format)
PÉCZELY, P, KISS, Jozsef Zoltan. Immunoreactivity to vasoactive intestinal polypeptide (VIP) and thyreotropin-releasing hormone (TRH) in hypothalamic neurons of the domesticated pigeon (Columba livia). Alterations following lactation and exposure to cold. In: Cell and Tissue Research, 1988, vol. 251, n° 2, p. 485-94. https://archive-ouverte.unige.ch/unige:74773

158 hits

0 download

Update

Deposited on : 2015-08-19

Export document
Format :
Citation style :