The insular cortex modulates cardiovascular responses to acute restraint stress in rats

Autor(es)

Alves, Fernando H. F. ^[1] ; Crestani, Carlos C. ^[1] ; Correa, Fernando M. A. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sch Med Ribeirao Preto, Dept Pharmacol, BR-14049900 Ribeirao Preto, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Brain Research; v. 1333, p. 57-63, MAY 28 2010.
• Citações Web of Science: 12

Resumo

Acute restraint is an unavoidable stress situation that evokes marked and sustained cardiovascular changes, which are characterized by blood pressure and heart rate increases. In the present study, we tested the hypothesis that insular cortex mediates cardiovascular responses to acute restraint stress in rats. To that purpose, the insular cortex synaptic transmission was inhibited by bilateral microinjection of the nonselective synaptic blocker cobalt chloride (CoCl(2), 1 mM/100 nL). Insular cortex pretreatment with CoCl(2) decreased restraint-evoked pressor and tachycardiac responses, thus indicating an involvement of synapses within the insular cortex on the modulation of cardiovascular responses to restraint stress. The present results indicate that insular cortex synapses exert a facilitatory influence on blood pressure and HR increase evoked by acute restraint stress in rats. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 06/57670-4 - Estudo da participação da neurotransmissão noradrenérgica do núcleo leito da estria terminal na regulação do sistema cardiovascular em ratos
• Beneficiário: Carlos Cesar Crestani
• Modalidade de apoio: Bolsas no Brasil - Doutorado