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Roncari CF, David RB, De Paula PM, Colombari DS, De Luca Jr. LA, Colombari E, Menani JV. The lateral parabrachial nucleus and central angiotensinergic mechanisms in the control of sodium intake induced by different stimuli. Behav Brain Res 2017. [DOI: 10.1016/j.bbr.2017.06.020] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Rapid stimulation of sodium intake combining aldosterone into the 4th ventricle and the blockade of the lateral parabrachial nucleus. Neuroscience 2017; 346:94-101. [DOI: 10.1016/j.neuroscience.2017.01.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Revised: 01/04/2017] [Accepted: 01/04/2017] [Indexed: 12/17/2022]
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Importance of the lateral parabrachial nucleus to sodium balance in fluid-depleted rats. Neurosci Res 2016; 111:41-7. [DOI: 10.1016/j.neures.2016.05.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 05/13/2016] [Accepted: 05/17/2016] [Indexed: 11/23/2022]
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Zanella RC, Melo MR, Furuya WI, Colombari E, Menani JV, Colombari DSA. Hydrogen peroxide centrally attenuates hyperosmolarity-induced thirst and natriuresis. Neurosci Lett 2016; 610:129-34. [DOI: 10.1016/j.neulet.2015.10.067] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Revised: 10/14/2015] [Accepted: 10/27/2015] [Indexed: 11/25/2022]
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David RB, Roncari CF, Lauar MR, Vendramini RC, Antunes-Rodrigues J, Menani JV, De Luca LA. Sodium intake, brain c-Fos protein and gastric emptying in cell-dehydrated rats treated with methysergide into the lateral parabrachial nucleus. Physiol Behav 2015; 151:111-20. [DOI: 10.1016/j.physbeh.2015.07.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Revised: 06/11/2015] [Accepted: 07/10/2015] [Indexed: 10/23/2022]
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Freiria-Oliveira AH, Blanch GT, Pedrino GR, Cravo SL, Murphy D, Menani JV, Colombari DSA. Catecholaminergic neurons in the comissural region of the nucleus of the solitary tract modulate hyperosmolality-induced responses. Am J Physiol Regul Integr Comp Physiol 2015; 309:R1082-91. [PMID: 26333788 DOI: 10.1152/ajpregu.00432.2014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Accepted: 08/31/2015] [Indexed: 11/22/2022]
Abstract
Noradrenergic A2 neurons of the nucleus of the solitary tract (NTS) have been suggested to contribute to body fluid homeostasis and cardiovascular regulation. In the present study, we investigated the effects of lesions of A2 neurons of the commissural NTS (cNTS) on the c-Fos expression in neurons of the hypothalamic paraventricular (PVN) and supraoptic (SON) nuclei, arterial pressure, water intake, and urinary excretion in rats with plasma hyperosmolality produced by intragastric 2 M NaCl (2 ml/rat). Male Holtzman rats (280-320 g) received an injection of anti-dopamine-β-hydroxylase-saporin (12.6 ng/60 nl; cNTS/A2-lesion, n = 28) or immunoglobulin G (IgG)-saporin (12.6 ng/60 nl; sham, n = 24) into the cNTS. The cNTS/A2 lesions increased the number of neurons expressing c-Fos in the magnocellular PVN in rats treated with hypertonic NaCl (90 ± 13, vs. sham: 47 ± 20; n = 4), without changing the number of neurons expressing c-Fos in the parvocellular PVN or in the SON. Contrary to sham rats, intragastric 2 M NaCl also increased arterial pressure in cNTS/A2-lesioned rats (16 ± 3, vs. sham: 2 ± 2 mmHg 60 min after the intragastric load; n = 9), an effect blocked by the pretreatment with the vasopressin antagonist Manning compound (0 ± 3 mmHg; n = 10). In addition, cNTS/A2 lesions enhanced hyperosmolality-induced water intake (10.5 ± 1.4, vs. sham: 7.7 ± 0.8 ml/60 min; n = 8-10), without changing renal responses to hyperosmolality. The results suggest that inhibitory mechanisms dependent on cNTS/A2 neurons reduce water intake and vasopressin-dependent pressor response to an acute increase in plasma osmolality.
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Affiliation(s)
- Andre H Freiria-Oliveira
- Department of Pathology and Physiology, School of Dentistry, São Paulo State University, Araraquara, São Paulo, Brazil
| | - Graziela T Blanch
- Department of Pathology and Physiology, School of Dentistry, São Paulo State University, Araraquara, São Paulo, Brazil
| | - Gustavo R Pedrino
- Department of Physiological Sciences, Federal University of Goias, Goiania, Goias, Brazil
| | - Sergio L Cravo
- Department of Physiology, Escola Paulista de Medicina, Universidade-Federal de São Paulo, São Paulo, Brazil
| | - David Murphy
- Henry Welcome Laboratories for Integrative Neuroscience and Endocrinology, University of Bristol, Bristol, United Kingdom; and Department of Physiology, University of Malaya, Kuala Lumpur, Malaysia
| | - José V Menani
- Department of Pathology and Physiology, School of Dentistry, São Paulo State University, Araraquara, São Paulo, Brazil
| | - Débora S A Colombari
- Department of Pathology and Physiology, School of Dentistry, São Paulo State University, Araraquara, São Paulo, Brazil;
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Andrade C, De Oliveira L, Andrade-Franzé G, De Luca Jr L, Colombari DS, Menani J. Gabaergic and opioid receptors mediate the facilitation of NaCl intake induced by α2-adrenergic activation in the lateral parabrachial nucleus. Behav Brain Res 2015; 278:535-41. [DOI: 10.1016/j.bbr.2014.10.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Revised: 10/01/2014] [Accepted: 10/06/2014] [Indexed: 02/06/2023]
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Andrade CAF, Andrade-Franzé GMF, De Paula PM, De Luca LA, Menani JV. Role of α2-adrenoceptors in the lateral parabrachial nucleus in the control of body fluid homeostasis. Braz J Med Biol Res 2014; 47:11-8. [PMID: 24519089 PMCID: PMC3932968 DOI: 10.1590/1414-431x20133308] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Accepted: 10/15/2013] [Indexed: 12/03/2022] Open
Abstract
Central α2-adrenoceptors and the pontine lateral parabrachial nucleus
(LPBN) are involved in the control of sodium and water intake. Bilateral injections
of moxonidine (α2-adrenergic/imidazoline receptor agonist) or
noradrenaline into the LPBN strongly increases 0.3 M NaCl intake induced by a
combined treatment of furosemide plus captopril. Injection of moxonidine into the
LPBN also increases hypertonic NaCl and water intake and reduces oxytocin secretion,
urinary sodium, and water excreted by cell-dehydrated rats, causing a positive sodium
and water balance, which suggests that moxonidine injected into the LPBN deactivates
mechanisms that restrain body fluid volume expansion. Pretreatment with specific
α2-adrenoceptor antagonists injected into the LPBN abolishes the
behavioral and renal effects of moxonidine or noradrenaline injected into the same
area, suggesting that these effects depend on activation of LPBN
α2-adrenoceptors. In fluid-depleted rats, the palatability of sodium is
reduced by ingestion of hypertonic NaCl, limiting intake. However, in rats treated
with moxonidine injected into the LPBN, the NaCl palatability remains high, even
after ingestion of significant amounts of 0.3 M NaCl. The changes in behavioral and
renal responses produced by activation of α2-adrenoceptors in the LPBN are
probably a consequence of reduction of oxytocin secretion and blockade of inhibitory
signals that affect sodium palatability. In this review, a model is proposed to show
how activation of α2-adrenoceptors in the LPBN may affect palatability
and, consequently, ingestion of sodium as well as renal sodium excretion.
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Affiliation(s)
- C A F Andrade
- Departamento de Fisiologia e Patologia, Faculdade de Odontologia, Universidade Estadual Paulista, AraraquaraSP, Brasil, Departamento de Fisiologia e Patologia, Faculdade de Odontologia, Universidade Estadual Paulista, Araraquara, SP, Brasil
| | - G M F Andrade-Franzé
- Departamento de Fisiologia e Patologia, Faculdade de Odontologia, Universidade Estadual Paulista, AraraquaraSP, Brasil, Departamento de Fisiologia e Patologia, Faculdade de Odontologia, Universidade Estadual Paulista, Araraquara, SP, Brasil
| | - P M De Paula
- Departamento de Fisiologia e Patologia, Faculdade de Odontologia, Universidade Estadual Paulista, AraraquaraSP, Brasil, Departamento de Fisiologia e Patologia, Faculdade de Odontologia, Universidade Estadual Paulista, Araraquara, SP, Brasil
| | - L A De Luca
- Departamento de Fisiologia e Patologia, Faculdade de Odontologia, Universidade Estadual Paulista, AraraquaraSP, Brasil, Departamento de Fisiologia e Patologia, Faculdade de Odontologia, Universidade Estadual Paulista, Araraquara, SP, Brasil
| | - J V Menani
- Departamento de Fisiologia e Patologia, Faculdade de Odontologia, Universidade Estadual Paulista, AraraquaraSP, Brasil, Departamento de Fisiologia e Patologia, Faculdade de Odontologia, Universidade Estadual Paulista, Araraquara, SP, Brasil
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Blanch GT, Freiria-Oliveira AH, Murphy D, Paulin RF, Antunes-Rodrigues J, Colombari E, Menani JV, Colombari DSA. Inhibitory mechanism of the nucleus of the solitary tract involved in the control of cardiovascular, dipsogenic, hormonal, and renal responses to hyperosmolality. Am J Physiol Regul Integr Comp Physiol 2013; 304:R531-42. [PMID: 23364528 DOI: 10.1152/ajpregu.00191.2012] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The nucleus of the solitary tract (NTS) is the primary site of visceral afferents to the central nervous system. In the present study, we investigated the effects of lesions in the commissural portion of the NTS (commNTS) on the activity of vasopressinergic neurons in the hypothalamic paraventricular (PVN) and supraoptic (SON) nuclei, plasma vasopressin, arterial pressure, water intake, and sodium excretion in rats with plasma hyperosmolality produced by intragastric 2 M NaCl (2 ml/rat). Male Holtzman rats with 15-20 days of sham or electrolytic lesion (1 mA; 10 s) of the commNTS were used. CommNTS lesions enhanced a 2 M NaCl intragastrically induced increase in the number of vasopressinergic neurons expressing c-Fos in the PVN (28 ± 1, vs. sham: 22 ± 2 c-Fos/AVP cells) and SON (26 ± 4, vs. sham: 11 ± 1 c-Fos/AVP cells), plasma vasopressin levels (21 ± 8, vs. sham: 6.6 ± 1.3 pg/ml), pressor responses (25 ± 7 mmHg, vs. sham: 7 ± 2 mmHg), water intake (17.5 ± 0.8, vs. sham: 11.2 ± 1.8 ml/2 h), and natriuresis (4.9 ± 0.8, vs. sham: 1.4 ± 0.3 meq/1 h). The pretreatment with vasopressin antagonist abolished the pressor response to intragastric 2 M NaCl in commNTS-lesioned rats (8 ± 2.4 mmHg at 10 min), suggesting that this response is dependent on vasopressin secretion. The results suggest that inhibitory mechanisms dependent on commNTS act to limit or counterbalance behavioral, hormonal, cardiovascular, and renal responses to an acute increase in plasma osmolality.
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Affiliation(s)
- Graziela T Blanch
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University, Araraquara, São Paulo, Brazil
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