Adrenergic mechanisms of the Kölliker-Fuse/A7 area on the control of water and sodium intake

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dc.contributor.authorGasparini, S. [UNESP]
dc.contributor.authorde Luca, L. A. [UNESP]
dc.contributor.authorColombari, Débora Simões de Almeida [UNESP]
dc.contributor.authorPaula, Patricia Maria de [UNESP]
dc.contributor.authorBarbosa, S. P. [UNESP]
dc.contributor.authorMenani, José Vanderlei [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:46:02Z
dc.date.available2014-05-20T13:46:02Z
dc.date.issued2009-12-01
dc.description.abstractThe blockade of serotoninergic receptors with methysergide or the activation of alpha(2)-adrenoceptors with moxonidine into the lateral parabrachial nucleus (LPBN) increases water and 0.3 M NaCl intake in rats treated with furosemide (FURO) combined with captopril (CAP). In the present study we investigated the effects of bilateral injections of noradrenaline (the endogenous neurotransmitter for alpha-adrenoceptors) alone or combined with the alpha(2)-adrenoceptor antagonist RX 821002 into the LPBN or into the rostral portion of the Kolliker-Fuse nucleus that includes also the A7 area (KF/A7 area) on FURO+CAP-induced water and 0.3 M NaCl intake. Male Holtzman rats with bilateral stainless steel guide-cannulas implanted into KF/A7 area or LPBN were used. FURO+CAP-induced 0.3 M NaCl intake strongly increased after bilateral injections of noradrenaline (80 or 160 nmol/0.2 mu l) into LPBN (26.5 +/- 5.9 and 20.7 +/- 2.0 ml/2 h versus saline: 4.4 +/- 0.9 ml/2 h) or into the KF/A7 area (31.5 +/- 6.1 and 25.9 +/- 4.7 ml/2 h versus saline: 7.2 +/- 1.6 ml/2 h). Water intake increased with noradrenaline injected in KF/A7 area, however, this treatment reduced 0.06 M sucrose intake, suggesting that the increase of water and NaCl intake is not related to non-specific effect. Bilateral injections of RX 821002 (160 nmol/0.2 mu l) into LPBN or KF/A7 area abolished the effects of noradrenaline (160 nmol/0.2 mu l) in the same areas on 0.3 M NaCl intake (7.5 +/- 2.5 and 9.8 +/- 4.4 ml/2 h, respectively). Moxonidine (0.5 nmol/0.2 mu l) injected bilaterally into the KF/A7 area increased 0.3 M NaCl intake (39.5 +/- 6.3 ml/3 h) and water intake, while methysergide (4 mu g/0.2 mu l) into the KF/A7 area did not alter 0.3 M NaCl or water intake. The results suggest that alpha(2)-adrenoceptor activation is a common mechanism in the KF/A7 area and LPBN to facilitate sodium intake. However, the serotonergic mechanism is present in LPBN, not in the KF/A7 area. (C) 2009 IBRO. Published by Elsevier Ltd. All rights reserved.en
dc.description.affiliationSão Paulo State Univ, UNESP, Dept Physiol & Pathol, Sch Dent, Araraquara, SP, Brazil
dc.description.affiliationUnespSão Paulo State Univ, UNESP, Dept Physiol & Pathol, Sch Dent, Araraquara, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.format.extent370-379
dc.identifierhttp://dx.doi.org/10.1016/j.neuroscience.2009.08.048
dc.identifier.citationNeuroscience. Oxford: Pergamon-Elsevier B.V. Ltd, v. 164, n. 2, p. 370-379, 2009.
dc.identifier.doi10.1016/j.neuroscience.2009.08.048
dc.identifier.issn0306-4522
dc.identifier.lattes0201361251312074
dc.identifier.lattes1023597870118105
dc.identifier.orcid0000-0001-5433-4493
dc.identifier.urihttp://hdl.handle.net/11449/16252
dc.identifier.wosWOS:000271731700004
dc.language.isoeng
dc.publisherPergamon-Elsevier B.V. Ltd
dc.relation.ispartofNeuroscience
dc.relation.ispartofjcr3.382
dc.relation.ispartofsjr1,602
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectnoradrenalineen
dc.subjectalpha(2)-adrenoceptoren
dc.subjectparabrachial nucleusen
dc.subjectsodium appetiteen
dc.subjectserotoninen
dc.titleAdrenergic mechanisms of the Kölliker-Fuse/A7 area on the control of water and sodium intakeen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderPergamon-Elsevier B.V. Ltd
unesp.author.lattes0201361251312074[4]
unesp.author.lattes1023597870118105
unesp.author.orcid0000-0001-5433-4493[4]
unesp.author.orcid0000-0003-1167-4441[6]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Odontologia, Araraquarapt

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