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Nitric oxide in the nucleus raphe magnus modulates cutaneous blood flow in rats during hypothermia
Authors
M. Amiri
A. Jahanshahi
+5 more
B. Jamei
A. Komaki
M. Kourosh Arami
S. Mehrpooya
J. Mirnajafi Zade
Publication date
1 January 2015
Publisher
View
on
PubMed
Abstract
Objective(s): Nucleus Raphe Magnus (NRM) that is involved in the regulation of body temperature contains nitric oxide (NO) synthase. Considering the effect of NO on skin blood flow control, in this study, we assessed its thermoregulatory role within the raphe magnus. Materials and Methods: To this end, tail blood flow of male Wistar rats was measured by laser doppler following the induction of hypothermia. Results: Intra�NRM injection of SNP (exogenous NO donor, 0.1� 0.2 μl, 0.2 nM) increased the blood flow. Similarly, unilateral microinjection of glutamate (0.1� 0.2 μl, 2.3 nM) into the nucleus increased the blood flow. This effect of L�glutamate was reduced by prior intra NRM administration of NO synthase inhibitor NG�methyl�L�arginine or NG�nitro�L�arginine methyl ester (L�NAME, 0.1 μl, 100 nM). Conclusion: It is concluded that NO modulates the thermoregulatory response of NRM to hypothermia and may interact with excitatory amino acids in central skin blood flow regulation. © 2015, Mashhad University of Medical Sciences. All rights reserved
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eprints Iran University of Medical Sciences
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oai:eprints.iums.ac.ir:5710
Last time updated on 10/10/2019
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