These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: 5-HT1A receptor activation counteracted the effect of acute immobilization of noradrenergic neurons in the rat locus coeruleus.
    Author: Rioja J, Santín LJ, López-Barroso D, Doña A, Ulzurrun E, Aguirre JA.
    Journal: Neurosci Lett; 2007 Jan 22; 412(1):84-8. PubMed ID: 17197087.
    Abstract:
    The aim of our study was to evaluate the effect of acute stress and the 5-HT(1A) receptor involvement in both, the hippocampus noradrenaline (NA) tissue levels and the c-Fos immunoreactivity (c-Fos-IR) in the catecholaminergic neurons of the locus coeruleus (LC). Double immunocytochemical staining of tyrosine hydroxilase (TH) and c-Fos protein combined with stereological techniques were used to study the specific cell activation in the LC neurons in five experimental groups (control group, immobilization (1h) group, 8-OH-DPAT group (8-OH-DPAT 0.3mg/kg, s.c.), DPAT+IMMO group (8-OH-DPAT 0.3mg/kg, s.c., 30' prior acute immobilization) and WAY+DPAT+IMMO group (WAY-100635 0.3mg/kg, s.c. and 8-OH-DPAT 0.3mg/kg, s.c., 45'and 30', respectively, before immobilization). The results showed that hippocampal NA tissue levels and c-Fos-IR in the TH positive neurons of the LC were significantly increased immediately and after 90', respectively, after the immobilization period. Pre-treatment with 8-OH-DPAT counteracted the effects induced by immobilization, but pre-treatment with WAY-100635 did not block the effects induced by 8-OH-DPAT. These results suggest that noradrenaline system is associated in a significant way with immobilization stress. The role of 5-HT(1A) receptor activation in this stress response is also discussed.
    [Abstract] [Full Text] [Related] [New Search]