ANGIOTENSINERGIC AND CHOLINERGIC RECEPTORS OF THE SUBFORNICAL ORGAN MEDIATE SODIUM INTAKE INDUCED BY GABAergic ACTIVATION OF THE LATERAL PARABRACHIAL NUCLEUS

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorRoncari, C. F.
dc.creatorDavid, R. B.
dc.creatorJohnson, R. F.
dc.creatorPaula, Patricia Maria de
dc.creatorColombari, Débora Simões de Almeida
dc.creatorDe Luca, L. A.
dc.creatorJohnson, A. K.
dc.creatorColombari, Eduardo
dc.creatorMenani, José Vanderlei
dc.date2014-12-03T13:10:47Z
dc.date2016-10-25T20:11:23Z
dc.date2014-12-03T13:10:47Z
dc.date2016-10-25T20:11:23Z
dc.date2014-03-14
dc.date.accessioned2017-04-06T06:23:17Z
dc.date.available2017-04-06T06:23:17Z
dc.identifierNeuroscience. Oxford: Pergamon-elsevier Science Ltd, v. 262, p. 1-8, 2014.
dc.identifier0306-4522
dc.identifierhttp://hdl.handle.net/11449/112520
dc.identifierhttp://acervodigital.unesp.br/handle/11449/112520
dc.identifier10.1016/j.neuroscience.2013.12.038
dc.identifierWOS:000331647900001
dc.identifierhttp://dx.doi.org/10.1016/j.neuroscience.2013.12.038
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/923281
dc.descriptionBilateral injections of the GABA(A) agonist muscimol into the lateral parabrachial nucleus (LPBN) induce 0.3 M NaCl and water intake in satiated and normovolemic rats, a response reduced by intracerebroventricular (icv) administration of losartan or atropine (angiotensinergic type 1 (AT(1)) and cholinergic muscarinic receptor antagonists, respectively). In the present study, we investigated the effects of the injections of losartan or atropine into the subfornical organ (SFO) on 0.3 M NaCl and water intake induced by injections of muscimol into the LPBN. In addition, using intracellular calcium measurement, we also tested the sensitivity of SFO-cultured cells to angiotensin II (ANG II) and carbachol (cholinergic agonist). In male Holtzman rats with cannulas implanted bilaterally into the LPBN and into the SFO, injections of losartan (1 mu g/ 0.1 mu l) or atropine (2 nmol/0.1 mu l) into the SFO almost abolished 0.3 M NaCl and water intake induced by muscimol (0.5 nmol/0.2 mu l) injected into the LPBN. In about 30% of the cultured cells of the SFO, carbachol and ANG II increased intracellular calcium concentration ([Ca2+](i)). Three distinct cell populations were found in the SFO, i.e., cells activated by either ANG II (25%) or carbachol (2.6%) or by both stimuli (2.3%). The results suggest that the activation of angiotensinergic and cholinergic mechanisms in the SFO is important for NaCl and water intake induced by the deactivation of LPBN inhibitory mechanisms with muscimol injections. They also show that there are cells in the SFO activated by both angiotensinergic and cholinergic stimuli, perhaps those involved in the responses to muscimol into the LPBN. (C) 2013 IBRO. Published by Elsevier Ltd. All rights reserved.
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.languageeng
dc.publisherElsevier B.V.
dc.relationNeuroscience
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectsodium appetite
dc.subjectparabrachial nucleus
dc.subjectsubfornical organ
dc.subjectAT(1) receptor
dc.subjectmuscarinic receptor
dc.titleANGIOTENSINERGIC AND CHOLINERGIC RECEPTORS OF THE SUBFORNICAL ORGAN MEDIATE SODIUM INTAKE INDUCED BY GABAergic ACTIVATION OF THE LATERAL PARABRACHIAL NUCLEUS
dc.typeOtro


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