Effect of acute restraint stress on the tachycardiac and bradycardiac responses of the baroreflex in rats

Stress : the International Journal on the Biology of Stress
C C CrestaniF M A Correa

Abstract

In the present study, we evaluated cardiac baroreflex responses of rats submitted to acute restraint stress. The baroreflex was tested: immediately before, during a 30 min exposure to restraint stress, as well as 30 and 60 min after ending the stress session (recovery period). Restraint increased both mean arterial pressure (MAP) and heart rate (HR). The magnitude of tachycardiac responses evoked by intravenous infusion of sodium nitroprusside was higher during restraint stress, whereas that of bradycardiac responses evoked by intravenous infusion of phenylephrine was decreased. Restraint-evoked baroreflex changes were still observed at 30 min into the recovery period, although MAP and HR values had already returned to control values. The baroreflex was back to control values at 60 min of the recovery period. Intravenous administration of the selective beta(1)-adrenoceptor antagonist atenolol blocked the restraint-evoked increase in the tachycardiac baroreflex response, but did not affect the effects on the bradycardiac response. In conclusion, the present results suggest that psychological stresses, such as those resulting from acute restraint, affect the baroreflex. Restraint facilitated the tachycardiac baroreflex response a...Continue Reading

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Citations

Oct 9, 2012·European Neuropsychopharmacology : the Journal of the European College of Neuropsychopharmacology·Felipe V GomesCarlos C Crestani
Aug 21, 2014·Autonomic Neuroscience : Basic & Clinical·Morgan E Hernandez, Linda F Hayward
Oct 17, 2015·Stress : the International Journal on the Biology of Stress·Yuan-Chang HsuYu-Min Kuo
Sep 12, 2015·British Journal of Pharmacology·D C LagattaL B M Resstel
Apr 1, 2010·Brain Research·Fernando H F AlvesFernando M A Corrêa
Jul 28, 2015·Autonomic Neuroscience : Basic & Clinical·Eduardo Albino Trindade FortalezaFernando Morgan Aguiar Corrêa
Feb 19, 2015·Stress : the International Journal on the Biology of Stress·Ana P P CardaCarlos R Tirapelli
Jun 7, 2014·Stress : the International Journal on the Biology of Stress·Daniel Gustavo Dos ReisFernando Morgan Aguiar Corrêa
Apr 2, 2015·Pharmacological Research : the Official Journal of the Italian Pharmacological Society·Leandro A OliveiraCarlos C Crestani
Sep 2, 2016·Stress : the International Journal on the Biology of Stress·Aline FassiniFernando M A Corrêa
Sep 21, 2016·The European Journal of Neuroscience·Davi C LagattaLeonardo B M Resstel
Jun 15, 2017·The European Journal of Neuroscience·Leandro A OliveiraCarlos C Crestani
Nov 17, 2017·Pflügers Archiv : European journal of physiology·Nilson Carlos Ferreira-JuniorLeonardo Barbosa Moraes Resstel
Oct 5, 2019·Stress : the International Journal on the Biology of Stress·Gabriel T do ValeCarlos R Tirapelli
Jun 17, 2020·Stress : the International Journal on the Biology of Stress·Martin VodičkaMichal Behuliak
Aug 10, 2019·Pflügers Archiv : European journal of physiology·Willian Costa-FerreiraCarlos C Crestani
Oct 19, 2019·The European Journal of Neuroscience·Nilson Carlos Ferreira-JuniorKarla Nívea Sampaio
Nov 4, 2016·Experimental Physiology·Nilson Carlos Ferreira-JuniorLeonardo Barbosa Moraes Resstel
May 31, 2018·Pflügers Archiv : European journal of physiology·Davi C LagattaLeonardo B M Resstel
Sep 29, 2019·The Journal of Experimental Biology·Egidi Mayara Silva FirminoLeonardo Barbosa Moraes Resstel
Dec 20, 2011·Experimental Physiology·América A ScopinhoCarlos C Crestani
Nov 4, 2020·Pflügers Archiv : European journal of physiology·Davi C LagattaLeonardo B M Resstel
Apr 18, 2021·Cellular and Molecular Neurobiology·Taíz F S BrasilFernando M A Corrêa
May 19, 2021·European Journal of Pharmacology·Ivaldo Jesus Almeida Belém-FilhoFernando Morgan Aguiar Corrêa

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