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De Luca LA, Laurin M, Menani JV. Control of fluid intake in dehydrated rats and evolution of sodium appetite. Physiol Behav 2024; 284:114642. [PMID: 39032667 DOI: 10.1016/j.physbeh.2024.114642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Revised: 07/04/2024] [Accepted: 07/17/2024] [Indexed: 07/23/2024]
Abstract
The objective of the present work is to examine from a new perspective the existence of causal factors not predicted by the classical theory that thirst and sodium appetite are two distinct motivations. For example, we ask why water deprivation induces sodium appetite, thirst is not "water appetite", and intracellular dehydration potentially causes sodium appetite. Contrary to the classical theory, we suggest that thirst first, and sodium appetite second, designate a temporal sequence underlying the same motivation. The single motivation becomes an "intervenient variable" a concept borrowed from the literature, fully explained in the text, between causes of dehydration (extracellular, intracellular, or both together), and respective behavioral responses subserved by hindbrain-dependent inhibition (e.g., lateral parabrachial nucleus) and forebrain facilitation (e.g., angiotensin II). A corollary is homology between rat sodium appetite and marine teleost thirst-like motivation that we name "protodipsia". The homology argument rests on similarities between behavior (salty water intake) and respective neuroanatomical as well as functional mechanisms. Tetrapod origin in a marine environment provides additional support for the homology. The single motivation hypothesis is also consistent with ingestive behaviors in nature given similarities (e.g., thirst producing brackish water intake) between the behavior of the laboratory rat and wild animals, rodents included. The hypotheses of single motivation and homology might explain why hyperosmotic rats, or eventually any other hyperosmotic tetrapod, shows paradoxical signs of sodium appetite. They might also explain how ingestive behaviors determined by dehydration and subserved by hindbrain inhibitory mechanisms contributed to tetrapod transition from sea to land.
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Affiliation(s)
- Laurival A De Luca
- Department of Physiology & Pathology, School of Dentistry, São Paulo State University (UNESP), 14801-903 Araraquara, São Paulo, Brazil.
| | - Michel Laurin
- CR2P, UMR 7207, CNRS/MNHN/SU, Muséum National d'Histoire Naturelle, Bâtiment de Géologie, CP 48, F-75231 Paris cedex 05, France
| | - José Vanderlei Menani
- Department of Physiology & Pathology, School of Dentistry, São Paulo State University (UNESP), 14801-903 Araraquara, São Paulo, Brazil
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Callera JC, De Luca LA, Menani JV. Involvement of V1-type vasopressin receptors on NaCl intake by hyperosmotic rats treated with muscimol in the lateral parabrachial nucleus. Neurosci Lett 2022; 778:136601. [DOI: 10.1016/j.neulet.2022.136601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 03/25/2022] [Accepted: 03/26/2022] [Indexed: 11/29/2022]
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Callera JC, De Luca LA, Menani JV. Mineral preference in rats treated with muscimol into the lateral parabrachial nucleus. Neurosci Lett 2020; 731:134989. [PMID: 32380141 DOI: 10.1016/j.neulet.2020.134989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 04/01/2020] [Accepted: 04/14/2020] [Indexed: 10/24/2022]
Abstract
Injection of muscimol, a GABAA receptor agonist, into the lateral parabrachial nucleus (LPBN) induces 0.3 M NaCl intake in rats. In the present work, we investigated whether such an effect applies to hypertonic (0.3 M) mineral solutions in general or is selective to sodium solutions in a 240 min intake test. Muscimol injection (0.5 nmol/0.2 μL) compared to vehicle injection into the LPBN of adult hydrated rats produced a preferential ingestion of 0.3 M NaCl (25.3 ± 10.2 mL) followed by a 0.3 M NaHCO3 intake (11.7 ± 5.6 mL), with no significant effect on water, KCl and CaCl2 intake. Only the effect of muscimol on NaCl intake (19.0 ± 10.4 mL) persisted in cell-dehydrated rats, with hardly any effect on water or other mineral solutions. The results suggest that the LPBN controls the ingestion of hypertonic NaCl and NaHCO3. They also suggest a selective mechanisms involving the LPBN to check hypertonic sodium intake.
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Affiliation(s)
- João Carlos Callera
- Department of Basic Sciences, School of Dentistry, Sao Paulo State University (UNESP), Rodovia Marechal Rondom, Km 527, 16018-805, Araçatuba, SP, Brazil.
| | | | - José Vanderlei Menani
- Department of Physiology and Pathology, School of Dentistry, UNESP, Araraquara, SP, Brazil
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Anesio A, Barbosa SP, De Luca LA, de Paula PM, Colombari DSA, Colombari E, Andrade CAF, Menani JV. Central muscarinic and LPBN mechanisms on sodium intake. Brain Res Bull 2018; 144:14-20. [PMID: 30391542 DOI: 10.1016/j.brainresbull.2018.10.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 10/25/2018] [Accepted: 10/30/2018] [Indexed: 11/28/2022]
Abstract
Central cholinergic activation stimulates water intake, but also NaCl intake when the inhibitory mechanisms are blocked with injections of moxonidine (α2 adrenergic/imidazoline agonist) into the lateral parabrachial nucleus (LPBN). In the present study, we investigated the involvement of central M1 and M2 muscarinic receptors on NaCl intake induced by pilocarpine (non-selective muscarinic agonist) intraperitoneally combined with moxonidine into the LPBN or by muscimol (GABAA agonist) into the LPBN. Male Holtzman rats with stainless steel cannulas implanted bilaterally in the LPBN and in the lateral ventricle were used. Pirenzepine (M1 muscarinic antagonist, 1 nmol/1 μl) or methoctramine (M2 muscarinic antagonist, 50 nmol/1 μL) injected intracerebroventricularly (i.c.v.) reduced 0.3 M NaCl and water intake in rats treated with pilocarpine (0.1 mg/100 g of body weight) injected intraperitoneally combined with moxonidine (0.5 nmol/0.2 μL) into the LPBN. In rats treated with muscimol (0.5 nmol/0.2 μL) into the LPBN, methoctramine i.c.v. also reduced 0.3 M NaCl and water intake, however, pirenzepine produced no effect. The results suggest that M1 and M2 muscarinic receptors activate central pathways involved in the control of water and sodium intake that are under the influence of the LPBN inhibitory mechanisms.
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Affiliation(s)
- Augusto Anesio
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University - UNESP, Araraquara, SP, Brazil
| | - Silas Pereira Barbosa
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University - UNESP, Araraquara, SP, Brazil
| | - Laurival A De Luca
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University - UNESP, Araraquara, SP, Brazil
| | - Patrícia Maria de Paula
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University - UNESP, Araraquara, SP, Brazil
| | - Débora S A Colombari
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University - UNESP, Araraquara, SP, Brazil
| | - Eduardo Colombari
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University - UNESP, Araraquara, SP, Brazil
| | - Carina A F Andrade
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University - UNESP, Araraquara, SP, Brazil
| | - José V Menani
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University - UNESP, Araraquara, SP, Brazil.
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Guan L, Qiao H, Wang N, Luo X, Yan J. The purinergic mechanism of the central nucleus of amygdala is involved in the modulation of salt intake in sodium-depleted rats. Brain Res Bull 2018; 143:132-137. [PMID: 30170187 DOI: 10.1016/j.brainresbull.2018.08.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2018] [Revised: 08/03/2018] [Accepted: 08/25/2018] [Indexed: 10/28/2022]
Abstract
The central nucleus of the amygdala (CeA) is a critical region in regulating sodium intake, and interestingly, purinergic receptors reportedly related to fluid balance, are also expressed in CeA. In this study, we investigated whether the purinergic mechanisms of CeA were involved in regulating sodium intake. Male Sprague-Dawley rats had cannulas implanted bilaterally into the CeA and were sodium depleted with furosemide (FURO 20 mg/kg) plus 24 h-sodium deficient food fed. Bilateral injections of the P2X purinergic agonist, α,β-methyleneadenosine 5'-triphosphate (α,β-methylene ATP 1.0, 2.0, 4.0 nmol, respectively) into the CeA region induced dose-related reductions in sodium intake without affecting water intake. Injection of P2X purinergic antagonist, pyridoxalphosphate-6-azophenyl-2',4'-disulfonic acid (PPADS 4.0 nmol/0.5 μl) into the CeA region did not alter sodium and water intake, however, prior injection of PPADS into the CeA area abolished the inhibitory effects on sodium intake by α,β-methylene ATP. Interestingly, prior injection of γ-aminobutyric acid type A (GABAA) receptor antagonist, bicuculline (4.0 nmol/0.5 μl) into the CeA region partially reversed the deficit of sodium intake induced by α,β-methylene ATP. These results suggest that purinergic receptors in the CeA are involved in the control of sodium intake in the sodium-depleted rats and this negative modulation may be, at least partly, mediated by the GABAA receptor.
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Affiliation(s)
- Limin Guan
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, Xi'an Jiaotong University College of Stomatology, 98# Xiwu Road, Xi'an, Shaanxi, 710061, PR China; Department of Physiology and Pathophysiology, Xi'an Jiaotong University School of Basic Medical Science, 76# W. Yanta Road, Xi'an, Shaanxi, 710061, PR China
| | - Hu Qiao
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, Xi'an Jiaotong University College of Stomatology, 98# Xiwu Road, Xi'an, Shaanxi, 710061, PR China; Department of Physiology and Pathophysiology, Xi'an Jiaotong University School of Basic Medical Science, 76# W. Yanta Road, Xi'an, Shaanxi, 710061, PR China
| | - Nan Wang
- Department of Physiology and Pathophysiology, Xi'an Jiaotong University School of Basic Medical Science, 76# W. Yanta Road, Xi'an, Shaanxi, 710061, PR China
| | - Xiao Luo
- Department of Physiology and Pathophysiology, Xi'an Jiaotong University School of Basic Medical Science, 76# W. Yanta Road, Xi'an, Shaanxi, 710061, PR China
| | - Jianqun Yan
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, Xi'an Jiaotong University College of Stomatology, 98# Xiwu Road, Xi'an, Shaanxi, 710061, PR China; Department of Physiology and Pathophysiology, Xi'an Jiaotong University School of Basic Medical Science, 76# W. Yanta Road, Xi'an, Shaanxi, 710061, PR China.
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Mirzaei-Damabi N, Namvar GR, Yeganeh F, Hatam M. α 2 Receptors in the lateral parabrachial nucleus generates the pressor response of the cardiovascular chemoreflex, effects of GABA A receptor. Brain Res Bull 2018; 140:190-196. [PMID: 29775659 DOI: 10.1016/j.brainresbull.2018.05.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 04/24/2018] [Accepted: 05/08/2018] [Indexed: 11/29/2022]
Abstract
The lateral parabrachial nucleus (LPBN) is a pontine area involved in cardiovascular chemoreflex. This study was performed to find the effects of reversible synaptic blockade of the LPBN on the chemoreflex responses, and to find the roles of GABAA receptor and α2-adenoreceptor (α2-AR) in chemoreflex. It also aimed to seek possible interaction between GABA and noradrenergic systems of the LPBN in urethane-anesthetized male rats. Cardiovascular chemoreflex was activated by intravenous injection of potassium cyanide (KCN, 80 μg/kg). The cardiovascular responses of chemoreflex were evaluated before (control), 5 and 15 min after microinjection of each drug (100 nl) into the LPBN. Microinjections of cobalt chloride (5 mM), a reversible synaptic blocker, into the LPBN greatly attenuated the chemoreflex pressor and bradycardic responses indicating that the LPBN plays a main role in chemoreflex. Local injection of yohimbine (10 nmol), an α2-AR antagonist, attenuated the pressor response with no effect on bradycardic response, suggesting that α2-adrenoreceptors are involved in producing the pressor response of the chemoreflex. Microinjection of bicuculline methiodide (BMI, 100 pmol), a GABAA antagonist, into the LPBN augmented the pressor response and attenuated the bradycardic response, indicating that GABA inhibits the sympathetic output to the heart and vasculature. Sequential injection of yohimbine and BMI had no significant effect on the pressor response but attenuated the bradycardia. In conclusion, the LPBN is essential for the chemoreflex responses. The pressor response of the chemoreflex, at least partly, is produced by α2- adenoreceptors. GABA in the LPBN inhibits the cardiovascular system. Finally, there is no interaction between GABAergic and adrenergic neurons of the LPBN in producing the cardiovascular chemoreflex.
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Affiliation(s)
| | - Gholam Reza Namvar
- Dept. of Physiology, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Fahimeh Yeganeh
- Dept. of Physiology, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Masoumeh Hatam
- Dept. of Physiology, Shiraz University of Medical Sciences, Shiraz, Iran.
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De Oliveira LB, Andrade CA, De Luca LA, Colombari DS, Menani JV. Opioid and α2 adrenergic mechanisms are activated by GABA agonists in the lateral parabrachial nucleus to induce sodium intake. Brain Res Bull 2018; 139:174-181. [DOI: 10.1016/j.brainresbull.2018.02.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 01/24/2018] [Accepted: 02/06/2018] [Indexed: 02/07/2023]
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Ryan PJ, Ross SI, Campos CA, Derkach VA, Palmiter RD. Oxytocin-receptor-expressing neurons in the parabrachial nucleus regulate fluid intake. Nat Neurosci 2017; 20:1722-1733. [PMID: 29184212 PMCID: PMC5705772 DOI: 10.1038/s41593-017-0014-z] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Accepted: 09/17/2017] [Indexed: 02/08/2023]
Abstract
Brain regions that regulate fluid satiation are not well characterized, yet are essential for understanding fluid homeostasis. We found that oxytocin-receptor-expressing neurons in the parabrachial nucleus of mice (OxtrPBN neurons) are key regulators of fluid satiation. Chemogenetic activation of OxtrPBN neurons robustly suppressed noncaloric fluid intake, but did not decrease food intake after fasting or salt intake following salt depletion; inactivation increased saline intake after dehydration and hypertonic saline injection. Under physiological conditions, OxtrPBN neurons were activated by fluid satiation and hypertonic saline injection. OxtrPBN neurons were directly innervated by oxytocin neurons in the paraventricular hypothalamus (OxtPVH neurons), which mildly attenuated fluid intake. Activation of neurons in the nucleus of the solitary tract substantially suppressed fluid intake and activated OxtrPBN neurons. Our results suggest that OxtrPBN neurons act as a key node in the fluid satiation neurocircuitry, which acts to decrease water and/or saline intake to prevent or attenuate hypervolemia and hypernatremia. The authors show that oxytocin-receptor-expressing neurons in the parabrachial nucleus are key regulators of fluid homeostasis that suppress fluid intake when activated, but do not decrease food intake after fasting or salt intake after salt depletion.
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Affiliation(s)
- Philip J Ryan
- Howard Hughes Medical Institute, University of Washington, Seattle, Washington, USA. .,Department of Biochemistry, University of Washington, Seattle, Washington, USA. .,The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, Victoria, Australia.
| | - Silvano I Ross
- Howard Hughes Medical Institute, University of Washington, Seattle, Washington, USA.,Department of Biochemistry, University of Washington, Seattle, Washington, USA
| | - Carlos A Campos
- Howard Hughes Medical Institute, University of Washington, Seattle, Washington, USA.,Department of Biochemistry, University of Washington, Seattle, Washington, USA
| | - Victor A Derkach
- Howard Hughes Medical Institute, University of Washington, Seattle, Washington, USA.,Department of Biochemistry, University of Washington, Seattle, Washington, USA
| | - Richard D Palmiter
- Howard Hughes Medical Institute, University of Washington, Seattle, Washington, USA. .,Department of Biochemistry, University of Washington, Seattle, Washington, USA.
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Yan JB, Hu ZH. [µ-opioid receptors in the central nucleus of the amygdala mediate sodium intake in rats]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2017; 37:1195-1200. [PMID: 28951361 PMCID: PMC6765484 DOI: 10.3969/j.issn.1673-4254.2017.09.09] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 04/02/2017] [Indexed: 06/07/2023]
Abstract
OBJECTIVE To investigate the opioidergic mechanism of the central nucleus of the amygdala (CeA) for regulating sodium appetite in rats. METHDOS Using the elaborate invasive cerebral cannulation and brain microinjection method, we observed the effects of bilateral intra-CeA injections of DAMGO (a selective µ-opioid receptor agonist) and CTAP (a highly selective µ-opioid receptor antagonist), either alone or in combination, on NaCl solution (0.3 mol/L) and water intake by rats in different models of Na+ ingestion. RESULTS In the two-bottle tests, bilateral injections of DAMGO at 1, 2, and 4 nmol into the CeA induced a dose-related increase of NaCl and water intake in rats treated with water deprivation with partial rehydration (WD-PR), and pretreatment with 0.5, 1, and 2 nmol CTAP injected into the CeA significantly suppressed DAMGO-induced NaCl and water intake in a dose-dependent manner: in the one-bottle tests, bilateral injections of DAMGO (2 noml) into the CeA had no effect on water intake of the rats. In rats with subcutaneous injection of furosemide (FURO) combined with captopril (CAP) (FURO+CAP), bilateral intra-CeA injections of DAMGO (2 nmol) caused increased NaCl and water intake in the two-bottle tests, but such effects were suppressed by pretreatment with CTAP injection into the CeA; in the one-bottle tests, bilateral intra-CeA injections of DAMGO had no effect on water intake of the rats. CONCLUSION µ-opioid receptors in the CeA are involved in the excitatory regulation of sodium appetite to mediate sodium intake. µ-opioid receptor antagonists are expected to be targets for developing inhibitors of sodium appetite.
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Affiliation(s)
- Jun-Bao Yan
- Department of Physiology, Medical College of Henan University of Science and Technology, Luoyang 471023, China.E-mail:
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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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Lateral parabrachial nucleus and opioid mechanisms of the central nucleus of the amygdala in the control of sodium intake. Behav Brain Res 2017; 316:11-17. [DOI: 10.1016/j.bbr.2016.08.035] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Revised: 08/11/2016] [Accepted: 08/16/2016] [Indexed: 11/21/2022]
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Domingos-Souza G, Meschiari CA, Buzelle SL, Callera JC, Antunes-Rodrigues J. Sodium and water intake are not affected by GABAC receptor activation in the lateral parabrachial nucleus of sodium-depleted rats. J Chem Neuroanat 2016; 74:47-54. [PMID: 26970564 DOI: 10.1016/j.jchemneu.2016.03.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Revised: 02/13/2016] [Accepted: 03/05/2016] [Indexed: 11/16/2022]
Abstract
The activation of GABAergic receptors, GABAA and GABAB, in the lateral parabrachial nucleus (LPBN) increases water and sodium intake in satiated and fluid-depleted rats. The present study investigated the presence of the GABAC receptor in the LPBN, its involvement in water and sodium intake, and its effects on cardiovascular parameters during the acute fluid depletion induced by furosemide combined with captopril (Furo/Cap). One group of male Wistar rats (290-300g) with bilateral stainless steel LPBN cannulas was used to test the effects of a GABAC receptor agonist and antagonist on the fluid intake and cardiovascular parameters. We investigated the effects of bilateral LPBN injections of trans-4-aminocrotonic acid (TACA) on the intake of water and 0.3M NaCl induced by acute fluid depletion (subcutaneous injection of Furo/Cap). c-Fos expression increased (P<0.05), suggesting LPBN neuronal activation. The injection of different doses of TACA (0.5, 2.0 and 160 nmol) in the LPBN did not change the sodium or water intake in Furo/Cap-treated rats (P>0.05). Treatment with the GABAC receptor antagonist (Z)-3-[(aminoiminomethyl)thio]prop-2-enoic acid sulfate (ZAPA, 10nmol) or with ZAPA (10nmol) plus TACA (160nmol) did not change the sodium or water intake compared with that for vehicle (saline) (P>0.05). Bilateral injections of the GABAC agonist in the LPBN of Furo/Cap-treated rats did not affect the mean arterial pressure (MAP) or heart rate (HR). The GABAC receptor expression in the LPBN was confirmed by the presence of a 50kDa band. Although LPBN neurons might express GABAC receptors, their activation produced no change in water and sodium intake or in the cardiovascular parameters in the acute fluid depletion rats. Therefore, the GABAC receptors in the LPBN might not interfere with fluid and blood pressure regulation.
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Affiliation(s)
- Gean Domingos-Souza
- Department of Physiology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.
| | - Cesar Arruda Meschiari
- Department of Physiology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Samyra Lopes Buzelle
- Department of Physiology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - João Carlos Callera
- Department of Basic Sciences, School of Dentistry, UNESP - Universidade Estadual Paulista, Rodovia, Araçatuba, SP, Brazil
| | - José Antunes-Rodrigues
- Department of Physiology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
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Importance of the central nucleus of the amygdala on sodium intake caused by deactivation of lateral parabrachial nucleus. Brain Res 2015; 1625:238-45. [DOI: 10.1016/j.brainres.2015.08.044] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Revised: 08/19/2015] [Accepted: 08/30/2015] [Indexed: 11/20/2022]
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Hayward LF, Hampton EE, Ferreira LF, Christou DD, Yoo JK, Hernandez ME, Martin EJ. Chronic heart failure alters orexin and melanin concentrating hormone but not corticotrophin releasing hormone-related gene expression in the brain of male Lewis rats. Neuropeptides 2015; 52:67-72. [PMID: 26111703 DOI: 10.1016/j.npep.2015.06.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 06/02/2015] [Accepted: 06/03/2015] [Indexed: 11/27/2022]
Abstract
OBJECTIVE The aim of this study was to investigate the effect of chronic heart failure (HF; 16 weeks post left coronary artery ligation) on the brain's orexin (ORX) and related neuropeptide systems. METHODS Indicators of cardiac function, including the percent fractional shortening (%FS) left ventricular posterior wall shortening velocity (LVPWSV) were assessed via echocardiography at 16 weeks post myocardial infarction or sham treatment in male Lewis rats (n=5/group). Changes in gene expression in HF versus control (CON) groups were quantified by real-time PCR in the hypothalamus, amygdala and dorsal pons. RESULTS HF significantly reduced both the %FS and LVPWSV when compared to CON animals (P<0.02). In the hypothalamus ORX gene expression was significantly reduced in HF and correlated with changes in cardiac function when compared to CON (P<0.02). No significant changes in hypothalamic ORX receptor (type 1 or type 2) gene expression were identified. Alternatively hypothalamic melanin concentrating hormone (MCH) gene expression was significantly upregulated in HF animals and negatively correlated with LVPWSV (P<0.006). In both the amygdala and dorsal pons ORX type 2 receptor expression was significantly down-regulated in HF compared to CON. ORX receptor type 1, CRH and CRH type 1 and type 2 receptor expressions were unchanged by HF in all brain regions analyzed. CONCLUSION These observations support previous work demonstrating that cardiovascular disease modulates the ORX system and identify that in the case of chronic HF the ORX system is altered in parallel with changes in MCH expression but independent of any significant changes in the central CRH system. This raises the new possibility that ORX and MCH systems may play an important role in the pathophysiology of HF.
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Affiliation(s)
- Linda F Hayward
- University of Florida, College of Veterinary Medicine, Dept. of Physiological Sciences, Gainesville, FL 32610, United States
| | - Erin E Hampton
- University of Florida, College of Veterinary Medicine, Dept. of Physiological Sciences, Gainesville, FL 32610, United States
| | - Leonardo F Ferreira
- University of Florida, College of Health and Human Performance, Dept. of Applied Physiology and Kinesiology, Gainesville, FL 32610, United States
| | - Demetra D Christou
- University of Florida, College of Health and Human Performance, Dept. of Applied Physiology and Kinesiology, Gainesville, FL 32610, United States
| | - Jeung-Ki Yoo
- University of Florida, College of Health and Human Performance, Dept. of Applied Physiology and Kinesiology, Gainesville, FL 32610, United States
| | - Morgan E Hernandez
- University of Florida, College of Veterinary Medicine, Dept. of Physiological Sciences, Gainesville, FL 32610, United States
| | - Eric J Martin
- University of Florida, College of Veterinary Medicine, Dept. of Physiological Sciences, Gainesville, FL 32610, United States
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Pavan CG, Roncari CF, Barbosa SP, De Paula PM, Colombari DS, De Luca LA, Colombari E, Menani JV. Activation of μ opioid receptors in the LPBN facilitates sodium intake in rats. Behav Brain Res 2015; 288:20-5. [DOI: 10.1016/j.bbr.2015.03.047] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Revised: 03/03/2015] [Accepted: 03/22/2015] [Indexed: 10/23/2022]
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Margatho L, Porcari C, Macchione A, da Silva Souza G, Caeiro X, Antunes-Rodrigues J, Vivas L, Godino A. Temporal dissociation between sodium depletion and sodium appetite appearance: Involvement of inhibitory and stimulatory signals. Neuroscience 2015; 297:78-88. [DOI: 10.1016/j.neuroscience.2015.03.059] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Revised: 03/20/2015] [Accepted: 03/25/2015] [Indexed: 12/23/2022]
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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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Davern PJ. A role for the lateral parabrachial nucleus in cardiovascular function and fluid homeostasis. Front Physiol 2014; 5:436. [PMID: 25477821 PMCID: PMC4235290 DOI: 10.3389/fphys.2014.00436] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Accepted: 10/26/2014] [Indexed: 11/13/2022] Open
Abstract
The lateral parabrachial nucleus (LPBN) is located in an anatomical position that enables it to perform a critical role in relaying signals related to the regulation of fluid and electrolyte intake and cardiovascular function from the brainstem to the forebrain. Early neuroanatomical studies have described the topographic organization of blood pressure sensitive neurons and functional studies have demonstrated a major role for the LPBN in regulating cardiovascular function, including blood pressure, in response to hemorrhages, and hypovolemia. In addition, inactivation of the LPBN induces overdrinking of water in response to a range of dipsogenic treatments primarily, but not exclusively, those associated with endogenous centrally acting angiotensin II. Moreover, treatments that typically cause water intake stimulate salt intake under some circumstances particularly when serotonin receptors in the LPBN are blocked. This review explores the expanding body of evidence that underlies the complex neural network within the LPBN influencing salt appetite, thirst and the regulation of blood pressure. Importantly understanding the interactions among neurons in the LPBN that affect fluid balance and cardiovascular control may be critical to unraveling the mechanisms responsible for hypertension.
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Affiliation(s)
- Pamela J Davern
- Neuropharmacology Laboratory, Baker IDI Heart and Diabetes Institute Melbourne, VIC, Australia
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Damasceno RS, Takakura AC, Moreira TS. Regulation of the chemosensory control of breathing by Kölliker-Fuse neurons. Am J Physiol Regul Integr Comp Physiol 2014; 307:R57-67. [PMID: 24760995 DOI: 10.1152/ajpregu.00024.2014] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The Kölliker-Fuse region (KF) and the lateral parabrachial nucleus (LPBN) have been implicated in the maintenance of cardiorespiratory control. Here, we evaluated the involvement of the KF region and the LPBN in cardiorespiratory responses elicited by chemoreceptor activation in unanesthetized rats. Male Wistar rats (280-330 g; n = 5-9/group) with bilateral stainless-steel guide cannulas implanted in the KF region or the LPBN were used. Injection of muscimol (100 and 200 pmol/100 nl) in the KF region decreased resting ventilation (1,140 ± 68 and 978 ± 100 vs. saline: 1,436 ± 155 ml·kg(-1)·min(-1)), without changing mean arterial pressure (MAP) and heart rate (HR). Bilateral injection of the GABA-A antagonist bicuculline (1 nmol/100 nl) in the KF blocked the inhibitory effect on ventilation (1,418 ± 138 vs. muscimol: 978 ± 100 ml·kg(-1)·min(-1)) elicited by muscimol. Muscimol injection in the KF reduced the increase in ventilation produced by hypoxia (8% O2) (1,827 ± 61 vs. saline: 3,179 ± 325 ml·kg(-1)·min(-1)) or hypercapnia (7% CO2) (1,488 ± 277 vs. saline: 3,539 ± 374 ml·kg(-1)·min(-1)) in unanesthetized rats. Bilateral injection of bicuculline in the KF blocked the decrease in ventilation produced by muscimol in the KF during peripheral or central chemoreflex activation. Bilateral injection of muscimol in the LPBN did not change resting ventilation or the increase in ventilation elicited by hypoxia or hypercapnia. The results of the present study suggest that the KF region, but not the LPBN, has mechanisms to control ventilation in resting, hypoxic, or hypercapnic conditions in unanesthetized rats.
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Affiliation(s)
- Rosélia S Damasceno
- Department of Physiology and Biophysics, Institute of Biomedical Science, University of São Paulo, São Paulo, Brazil; and
| | - Ana C Takakura
- Department of Pharmacology, Institute of Biomedical Science, University of São Paulo, São Paulo, Brazil
| | - Thiago S Moreira
- Department of Physiology and Biophysics, Institute of Biomedical Science, University of São Paulo, São Paulo, Brazil; and
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Chebbi R, Boyer N, Monconduit L, Artola A, Luccarini P, Dallel R. The nucleus raphe magnus OFF-cells are involved in diffuse noxious inhibitory controls. Exp Neurol 2014; 256:39-45. [PMID: 24681000 DOI: 10.1016/j.expneurol.2014.03.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2013] [Revised: 03/01/2014] [Accepted: 03/14/2014] [Indexed: 12/11/2022]
Abstract
Diffuse noxious inhibitory controls (DNIC) are very powerful long-lasting descending inhibitory controls which are pivotal in modulating the activity of spinal and trigeminal nociceptive neurons. DNIC are subserved by a loop involving supraspinal structures such as the lateral parabrachial nucleus and the subnucleus reticularis dorsalis. Surprisingly, though, whether the nucleus raphe magnus (NRM), another supraspinal area which is long known to be important in pain modulation, is involved in DNIC is still a matter of discussion. Here, we reassessed the role of the NRM neurons in DNIC by electrophysiologically recording from wide dynamic range (WDR) neurons in the trigeminal subnucleus oralis and pharmacologically manipulating the NRM OFF- and ON-cells. In control conditions, C-fiber-evoked responses in trigeminal WDR neurons are inhibited by a conditioning noxious heat stimulation applied to the hindpaw. We show that inactivating the NRM by microinjecting the GABAA receptor agonist, muscimol, both facilitates C-fiber-evoked responses of trigeminal WDR neurons and strongly attenuates their inhibition by heat applied to the hindpaw. Interestingly, selective blockade of ON-cells by microinjecting the broad-spectrum excitatory amino acid antagonist, kynurenate, into the NRM neither affects C-fiber-evoked responses nor attenuates DNIC of trigeminal WDR neurons. These results indicate that the NRM tonically inhibits trigeminal nociceptive inputs and is involved in the neuronal network underlying DNIC. Moreover, within NRM, OFF-cells might be more specifically involved in both the tonic and phasic descending inhibitory controls of trigeminal nociception.
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Affiliation(s)
- R Chebbi
- Clermont Université, Université d'Auvergne, NEURO-DOL, BP 10448, F-63000 Clermont-Ferrand, France; INSERM, U1107, F-63001 Clermont-Ferrand, France; Faculté de médecine dentaire, Monastir, Tunisie
| | - N Boyer
- Clermont Université, Université d'Auvergne, NEURO-DOL, BP 10448, F-63000 Clermont-Ferrand, France; INSERM, U1107, F-63001 Clermont-Ferrand, France
| | - L Monconduit
- Clermont Université, Université d'Auvergne, NEURO-DOL, BP 10448, F-63000 Clermont-Ferrand, France; INSERM, U1107, F-63001 Clermont-Ferrand, France
| | - A Artola
- Clermont Université, Université d'Auvergne, NEURO-DOL, BP 10448, F-63000 Clermont-Ferrand, France; INSERM, U1107, F-63001 Clermont-Ferrand, France
| | - P Luccarini
- Clermont Université, Université d'Auvergne, NEURO-DOL, BP 10448, F-63000 Clermont-Ferrand, France; INSERM, U1107, F-63001 Clermont-Ferrand, France
| | - R Dallel
- Clermont Université, Université d'Auvergne, NEURO-DOL, BP 10448, F-63000 Clermont-Ferrand, France; INSERM, U1107, F-63001 Clermont-Ferrand, France.
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Kim YK, Yang EJ, Cho K, Lim JY, Paik NJ. Functional Recovery After Ischemic Stroke Is Associated With Reduced GABAergic Inhibition in the Cerebral Cortex: A GABA PET Study. Neurorehabil Neural Repair 2014; 28:576-83. [PMID: 24463186 DOI: 10.1177/1545968313520411] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
BACKGROUND γ-Aminobutyric acid (GABA) plasticity plays an important role in stroke motor recovery in a mouse model. However, little is known about changes over time in neuronal excitability mediated by GABA receptors in human stroke patients. OBJECTIVES To establish the mechanism of neuroplasticity during the recovery phase following ischemic stroke by assessing the changes in cerebral GABA activity using [(18)F]flumazenil ([(18)F]FMZ) positron emission tomography (PET). METHODS A total of 10 patients with unilateral ischemic stroke were studied at 1 month (T0) and 3 months (T1) postonset using [(18)F]FMZ PET. Changes in regional GABAergic activity were assessed longitudinally, and values were also compared with those in 15 age-matched controls. Upper-extremity motor function was evaluated using the Fugl-Meyer score (FMS). RESULTS During the follow-up period, statistical parametric mapping analysis demonstrated a decrease in GABAA receptor availability throughout the cerebral cortex and cerebellum, especially the contralateral hemisphere. GABAA availability in the bilateral primary motor cortex, contralateral supplemental motor cortex, and globus pallidus at T0 was positively correlated with the FMS score at T1 CONCLUSIONS: This is the first prospective, controlled longitudinal study showing that the change in GABA receptor availability over time is significantly related to motor recovery after stroke in humans. This work supports the rationale for a novel strategy to promote motor recovery after stroke.
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Affiliation(s)
- Yu Kyeong Kim
- Seoul National University Boramae Medical Center, Seoul, South Korea
| | - Eun Joo Yang
- Seoul National University Bundang Hospital, Seongnam, South Korea
| | - Kyehee Cho
- Seoul National University Bundang Hospital, Seongnam, South Korea
| | - Jong Youb Lim
- Seoul National University Bundang Hospital, Seongnam, South Korea
| | - Nam-Jong Paik
- Seoul National University Bundang Hospital, Seongnam, South Korea
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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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Menani JV, De Luca LA, Johnson AK. Role of the lateral parabrachial nucleus in the control of sodium appetite. Am J Physiol Regul Integr Comp Physiol 2014; 306:R201-10. [PMID: 24401989 DOI: 10.1152/ajpregu.00251.2012] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In states of sodium deficiency many animals seek and consume salty solutions to restore body fluid homeostasis. These behaviors reflect the presence of sodium appetite that is a manifestation of a pattern of central nervous system (CNS) activity with facilitatory and inhibitory components that are affected by several neurohumoral factors. The primary focus of this review is on one structure in this central system, the lateral parabrachial nucleus (LPBN). However, before turning to a more detailed discussion of the LPBN, a brief overview of body fluid balance-related body-to-brain signaling and the identification of the primary CNS structures and humoral factors involved in the control of sodium appetite is necessary. Angiotensin II, mineralocorticoids, and extracellular osmotic changes act on forebrain areas to facilitate sodium appetite and thirst. In the hindbrain, the LPBN functions as a key integrative node with an ascending output that exerts inhibitory influences on forebrain regions. A nonspecific or general deactivation of LPBN-associated inhibition by GABA or opioid agonists produces NaCl intake in euhydrated rats without any other treatment. Selective LPBN manipulation of other neurotransmitter systems [e.g., serotonin, cholecystokinin (CCK), corticotrophin-releasing factor (CRF), glutamate, ATP, or norepinephrine] greatly enhances NaCl intake when accompanied by additional treatments that induce either thirst or sodium appetite. The LPBN interacts with key forebrain areas that include the subfornical organ and central amygdala to determine sodium intake. To summarize, a model of LPBN inhibitory actions on forebrain facilitatory components for the control of sodium appetite is presented in this review.
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Affiliation(s)
- Jose V Menani
- Department of Physiology and Pathology, School of Dentistry, Universidade Estadual Paulista, Araraquara, São Paulo, Brazil; and Departments of Psychology, Pharmacology and Health, and Human Physiology and the Cardiovascular Center, University of Iowa, Iowa City, Iowa
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Yan JB, Sun HL, Wang Q, Chen K, Sun B, Song L, Yan W, Zhao XL, Zhao SR, Zhang Y, Qiao H, Hu B, Yan JQ. Natriorexigenic effect of DAMGO is decreased by blocking AT1 receptors in the central nucleus of the amygdala. Neuroscience 2013; 262:9-20. [PMID: 24389419 DOI: 10.1016/j.neuroscience.2013.12.046] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2013] [Revised: 12/20/2013] [Accepted: 12/21/2013] [Indexed: 11/17/2022]
Abstract
μ-Opioid receptor (μ-OR) activation with agonist [D-Ala², N-Me-Phe⁴, Gly⁵-ol]-enkephalin (DAMGO) in the central nucleus of the amygdala (CeA) induces sodium (0.3M NaCl) intake in rats. The purpose of this study was to examine the effects of pre-injections of losartan (AT1 angiotensin receptor antagonist) into the CeA on 0.3 M NaCl and water intake induced by DAMGO injected bilaterally in the same area in rats submitted to water deprivation-partial rehydration (WD-PR) and in rats treated with the diuretic furosemide (FURO) combined with a low dose of the angiotensin-converting enzyme inhibitor captopril (CAP) injected subcutaneously (FURO/CAP). Male Sprague-Dawley rats with stainless steel cannulas implanted bilaterally into the CeA were used. In WD-PR rats, bilateral injections of DAMGO (2 nmol in 0.5 μL) into the CeA induced 0.3 M NaCl and water intake, and pre-treatment with losartan (108 nmol in 0.5 μL) injected into the CeA reduced 0.3 M NaCl and water intake induced by DAMGO. In FURO/CAP rats, pre-treatment with losartan (108 nmol in 0.5 μL) injected into the CeA attenuated the increase in 0.3M NaCl and water intake induced by DAMGO (2 nmol in 0.5 μL) injected into the same site. The results suggest that the natriorexigenic effect of DAMGO injected into the CeA is facilitated by endogenous angiotensin II acting on AT1 receptors in the CeA, which drives rats to ingest large amounts of hypertonic NaCl.
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Affiliation(s)
- J-B Yan
- Department of Physiology and Pathophysiology, Xi'an Jiaotong University Health Science Center, 76# West Yanta Road, Xi'an, Shaanxi 710061, PR China; Department of Physiology, Medical College of Henan University of Science and Technology, 263# Kaiyuan Avenue, Luoyang, Henan 471023, PR China
| | - H-L Sun
- Department of Physiology and Pathophysiology, Xi'an Jiaotong University Health Science Center, 76# West Yanta Road, Xi'an, Shaanxi 710061, PR China; Department of Oral Biology, Xi'an Jiaotong University College of Stomatology, 98# Xiwu Road, Xi'an, Shaanxi 710004, PR China
| | - Q Wang
- Department of Physiology and Pathophysiology, Xi'an Jiaotong University Health Science Center, 76# West Yanta Road, Xi'an, Shaanxi 710061, PR China
| | - K Chen
- Department of Physiology and Pathophysiology, Xi'an Jiaotong University Health Science Center, 76# West Yanta Road, Xi'an, Shaanxi 710061, PR China
| | - B Sun
- Department of Physiology and Pathophysiology, Xi'an Jiaotong University Health Science Center, 76# West Yanta Road, Xi'an, Shaanxi 710061, PR China
| | - L Song
- Department of Physiology and Pathophysiology, Xi'an Jiaotong University Health Science Center, 76# West Yanta Road, Xi'an, Shaanxi 710061, PR China
| | - W Yan
- Department of Physiology and Pathophysiology, Xi'an Jiaotong University Health Science Center, 76# West Yanta Road, Xi'an, Shaanxi 710061, PR China
| | - X-L Zhao
- Department of Physiology and Pathophysiology, Xi'an Jiaotong University Health Science Center, 76# West Yanta Road, Xi'an, Shaanxi 710061, PR China
| | - S-R Zhao
- Department of Physiology and Pathophysiology, Xi'an Jiaotong University Health Science Center, 76# West Yanta Road, Xi'an, Shaanxi 710061, PR China
| | - Y Zhang
- Department of Physiology and Pathophysiology, Xi'an Jiaotong University Health Science Center, 76# West Yanta Road, Xi'an, Shaanxi 710061, PR China
| | - H Qiao
- Department of Physiology and Pathophysiology, Xi'an Jiaotong University Health Science Center, 76# West Yanta Road, Xi'an, Shaanxi 710061, PR China
| | - B Hu
- Department of Physiology and Pathophysiology, Xi'an Jiaotong University Health Science Center, 76# West Yanta Road, Xi'an, Shaanxi 710061, PR China
| | - J-Q Yan
- Department of Physiology and Pathophysiology, Xi'an Jiaotong University Health Science Center, 76# West Yanta Road, Xi'an, Shaanxi 710061, PR China; Department of Oral Biology, Xi'an Jiaotong University College of Stomatology, 98# Xiwu Road, Xi'an, Shaanxi 710004, PR China.
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Roncari CF, David RB, Johnson RF, De Paula PM, Colombari DSA, De Luca LA, Johnson AK, Colombari E, Menani JV. Angiotensinergic and cholinergic receptors of the subfornical organ mediate sodium intake induced by GABAergic activation of the lateral parabrachial nucleus. Neuroscience 2013; 262:1-8. [PMID: 24374079 DOI: 10.1016/j.neuroscience.2013.12.038] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2013] [Revised: 11/26/2013] [Accepted: 12/18/2013] [Indexed: 10/25/2022]
Abstract
Bilateral 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 (AT₁) 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 0.3M 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 μg/0.1 μl) or atropine (2 nmol/0.1 μl) into the SFO almost abolished 0.3M NaCl and water intake induced by muscimol (0.5 nmol/0.2 μl) 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.
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Affiliation(s)
- C F Roncari
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University, UNESP, Araraquara, SP, Brazil; Department of Psychology, The Cardiovascular Center, University of Iowa, Iowa City, IA, USA; Department of Pharmacology, The Cardiovascular Center, University of Iowa, Iowa City, IA, USA
| | - R B David
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University, UNESP, Araraquara, SP, Brazil; Department of Psychology, The Cardiovascular Center, University of Iowa, Iowa City, IA, USA; Department of Pharmacology, The Cardiovascular Center, University of Iowa, Iowa City, IA, USA
| | - R F Johnson
- Department of Psychology, The Cardiovascular Center, University of Iowa, Iowa City, IA, USA; Department of Pharmacology, The Cardiovascular Center, University of Iowa, Iowa City, IA, USA
| | - P M De Paula
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University, UNESP, Araraquara, SP, Brazil
| | - D S A Colombari
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University, UNESP, Araraquara, SP, Brazil
| | - L A De Luca
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University, UNESP, Araraquara, SP, Brazil
| | - A K Johnson
- Department of Psychology, The Cardiovascular Center, University of Iowa, Iowa City, IA, USA; Department of Pharmacology, The Cardiovascular Center, University of Iowa, Iowa City, IA, USA
| | - E Colombari
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University, UNESP, Araraquara, SP, Brazil
| | - J V Menani
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University, UNESP, Araraquara, SP, Brazil.
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Shimoura CG, Barbosa SP, Menani JV, De Gobbi JIF. Would right atrial stretch inhibit sodium intake following GABAA receptor activation in the lateral parabrachial nucleus? Neurosci Lett 2013; 553:121-5. [PMID: 23973335 DOI: 10.1016/j.neulet.2013.08.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2013] [Revised: 07/31/2013] [Accepted: 08/03/2013] [Indexed: 11/16/2022]
Abstract
The knowledge of the mechanisms underlying circulating volume control may be achieved by stretching a balloon placed at the junction of the superior vena cava-right atrial junction (SVC-RAJ). We investigated whether the inflation of a balloon at the SVC-RAJ inhibits the intake of 0.3M NaCl induced by GABAA receptor activation in the lateral parabrachial nucleus (LPBN) in euhydrated and satiated rats. Male Wistar rats (280-300 g) with bilateral stainless steel LPBN cannulae and balloons implanted at the SVC-RAJ were used. Bilateral injections of the GABAA receptor agonist muscimol (0.5 ηmol/0.2l) in the LPBN with deflated balloons increased intake of 0.3M NaCl (30.1 ± 3.9 vs. saline: 2.2 ± 0.7)ml/210 min, n=8) and water (17.7 ± 1.9 vs. saline: 2.9 ± 0.5 ml/210 min). Conversely, 0.3M NaCl (27.8 ± 2.1 ml/210 min) and water (22.8 ± 2.3 ml/210 min) intake were not affected in rats with inflated balloons at the SVC-RAJ. The results show that sodium and water intake induced by muscimol injected into the LPBN was not affected by balloon inflation at the SVC-RAJ. We suggest that the blockade of LPBN neuronal activity with muscimol injections impairs inhibitory mechanisms activated by signals from cardiopulmonary volume receptors determined by balloon inflation.
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Affiliation(s)
- Caroline Gusson Shimoura
- Department of Physiology, Institute of Bioscience, São Paulo State University (UNESP), 18618-000 Botucatu, SP, Brazil
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de Melo e Silva T, Bearare GP, Sumida DH, Callera JC. Periodontal disease reduces water and sodium intake induced by injection of muscimol into the lateral parabrachial nucleus. Arch Oral Biol 2013; 58:1369-77. [DOI: 10.1016/j.archoralbio.2013.04.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2012] [Revised: 03/15/2013] [Accepted: 04/22/2013] [Indexed: 11/29/2022]
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Gasparini S, Gomide JMC, Andrade-Franzé GMF, Totola LT, De Luca LA, Colombari DSA, De Paula PM, Moreira TS, Menani JV. Facilitation of sodium intake by combining noradrenaline into the lateral parabrachial nucleus with prazosin peripherally. Pharmacol Biochem Behav 2013; 111:111-9. [PMID: 24041937 DOI: 10.1016/j.pbb.2013.08.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Revised: 08/20/2013] [Accepted: 08/28/2013] [Indexed: 11/28/2022]
Abstract
Injections of noradrenaline into the lateral parabrachial nucleus (LPBN) increase arterial pressure and 1.8% NaCl intake and decrease water intake in rats treated with the diuretic furosemide (FURO) combined with a low dose of the angiotensin converting enzyme inhibitor captopril (CAP). In the present study, we investigated the influence of the pressor response elicited by noradrenaline injected into the LPBN on FURO+CAP-induced water and 1.8% NaCl intake. Male Holtzman rats with bilateral stainless steel guide-cannulas implanted into LPBN were used. Bilateral injections of noradrenaline (40 nmol/0.2 μl) into the LPBN increased FURO+CAP-induced 1.8% NaCl intake (12.2±3.5, vs., saline: 4.2±0.8 ml/180 min), reduced water intake and strongly increased arterial pressure (50±7, vs. saline: 1±1 mmHg). The blockade of the α1 adrenoceptors with the prazosin injected intraperitoneally abolished the pressor response and increased 1.8% NaCl and water intake in rats treated with FURO+CAP combined with noradrenaline injected into the LPBN. The deactivation of baro and perhaps volume receptors due to the cardiovascular effects of prazosin is a mechanism that may facilitate water and NaCl intake in rats treated with FURO+CAP combined with noradrenaline injected into the LPBN. Therefore, the activation of α2 adrenoceptors with noradrenaline injected into the LPBN, at least in dose tested, may not completely remove the inhibitory signals produced by the activation of the cardiovascular receptors, particularly the signals that result from the extra activation of these receptors with the increase of arterial pressure.
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Affiliation(s)
- S Gasparini
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University, UNESP, Araraquara, São Paulo, Brazil
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Kimura EH, De Oliveira LB, Menani JV, Callera JC. Baclofen into the lateral parabrachial nucleus induces hypertonic sodium chloride intake during cell dehydration. Behav Brain Funct 2013; 9:17. [PMID: 23642235 PMCID: PMC3679877 DOI: 10.1186/1744-9081-9-17] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Accepted: 04/23/2013] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Activation of GABA(B) receptors with baclofen into the lateral parabrachial nucleus (LPBN) induces ingestion of water and 0.3 M NaCl in fluid replete rats. However, up to now, no study has investigated the effects of baclofen injected alone or combined with GABA(B) receptor antagonist into the LPBN on water and 0.3 M NaCl intake in rats with increased plasma osmolarity (rats treated with an intragastric load of 2 M NaCl). Male Wistar rats with stainless steel cannulas implanted bilaterally into the LPBN were used. RESULTS In fluid replete rats, baclofen (0.5 nmol/0.2 μl), bilaterally injected into the LPBN, induced ingestion of 0.3 M NaCl (14.3 ± 4.1 vs. saline: 0.2 ± 0.2 ml/210 min) and water (7.1 ± 2.9 vs. saline: 0.6 ± 0.5 ml/210 min). In cell-dehydrated rats, bilateral injections of baclofen (0.5 and 1.0 nmol/0.2 μl) into the LPBN induced an increase of 0.3 M NaCl intake (15.6 ± 5.7 and 21.5 ± 3.5 ml/210 min, respectively, vs. saline: 1.7 ± 0.8 ml/210 min) and an early inhibition of water intake (3.5 ± 1.4 and 6.7 ± 2.1 ml/150 min, respectively, vs. saline: 9.2 ± 1.4 ml/150 min). The pretreatment of the LPBN with 2-hydroxysaclofen (GABA(B) antagonist, 5 nmol/0.2 μl) potentiated the effect of baclofen on 0.3 M NaCl intake in the first 90 min of test and did not modify the inhibition of water intake induced by baclofen in cell-dehydrated rats. Baclofen injected into the LPBN did not affect blood pressure and heart rate. CONCLUSIONS Thus, injection of baclofen into the LPBN in cell-dehydrated rats induced ingestion of 0.3 M NaCl and inhibition of water intake, suggesting that even in a hyperosmotic situation, the blockade of LPBN inhibitory mechanisms with baclofen is enough to drive rats to drink hypertonic NaCl, an effect independent of changes in blood pressure.
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Affiliation(s)
- Everton H Kimura
- Department of Basic Sciences, School of Dentistry, UNESP - Univ. Estadual Paulista, Rodovia Marechal Rondom, km 527, Araçatuba, São Paulo 16018-805, Brazil
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Yan J, Li J, Yan J, Sun H, Wang Q, Chen K, Sun B, Wei X, Song L, Zhao X, Wei S, Han L. Activation of μ-opioid receptors in the central nucleus of the amygdala induces hypertonic sodium intake. Neuroscience 2013; 233:28-43. [DOI: 10.1016/j.neuroscience.2012.12.026] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2012] [Revised: 12/13/2012] [Accepted: 12/15/2012] [Indexed: 12/29/2022]
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31
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Asnar DS, Roncari CF, De Luca LA, de Paula PM, Colombari DS, Menani JV. Involvement of central cholinergic mechanisms on sodium intake induced by gabaergic activation of the lateral parabrachial nucleus. Neurosci Lett 2013; 534:188-92. [DOI: 10.1016/j.neulet.2012.11.042] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Revised: 11/16/2012] [Accepted: 11/17/2012] [Indexed: 11/17/2022]
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32
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Wang Q, Li J, Yang X, Chen K, Sun B, Yan J. Inhibitory effect of activation of GABAA receptor in the central nucleus of amygdala on the sodium intake in the sodium-depleted rat. Neuroscience 2012; 223:277-84. [DOI: 10.1016/j.neuroscience.2012.07.068] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2012] [Revised: 07/04/2012] [Accepted: 07/31/2012] [Indexed: 10/28/2022]
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33
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Andrade C, Margatho L, Andrade-Franzé G, De Luca L, Antunes-Rodrigues J, Menani J. Moxonidine into the lateral parabrachial nucleus reduces renal and hormonal responses to cell dehydration. Neuroscience 2012; 208:69-78. [DOI: 10.1016/j.neuroscience.2012.02.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2011] [Revised: 02/07/2012] [Accepted: 02/07/2012] [Indexed: 11/27/2022]
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Shirazi-Nejad M, Naghdi N, Oryan S. Interaction between Angiotensinergic System and GABAergic System on Thirst in Adult Male Rats. ACTA ACUST UNITED AC 2012. [DOI: 10.4236/jbbs.2012.23034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Roncari C, David R, de Paula P, Colombari D, de Luca L, Menani J. Importance of central AT1 receptors for sodium intake induced by GABAergic activation of the lateral parabrachial nucleus. Neuroscience 2011; 196:147-52. [DOI: 10.1016/j.neuroscience.2011.08.042] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2011] [Revised: 06/15/2011] [Accepted: 08/19/2011] [Indexed: 10/17/2022]
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36
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Natriorexigenic effect of baclofen is reduced by AT1 receptor blockade in the lateral parabrachial nucleus. Brain Res Bull 2011; 86:348-54. [DOI: 10.1016/j.brainresbull.2011.09.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2011] [Revised: 09/01/2011] [Accepted: 09/04/2011] [Indexed: 11/19/2022]
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37
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Da Silva CZC, Menani JV, Callera JC. AT1 receptor blockade in the lateral parabrachial nucleus reduces the effects of muscimol on sodium intake. Brain Res 2011; 1403:28-36. [DOI: 10.1016/j.brainres.2011.06.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2011] [Revised: 05/30/2011] [Accepted: 06/02/2011] [Indexed: 11/29/2022]
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Purinergic mechanisms of lateral parabrachial nucleus facilitate sodium depletion-induced NaCl intake. Brain Res 2010; 1372:49-58. [PMID: 21129366 DOI: 10.1016/j.brainres.2010.11.075] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2010] [Revised: 11/13/2010] [Accepted: 11/20/2010] [Indexed: 02/06/2023]
Abstract
Purinergic receptors are present in the lateral parabrachial nucleus (LPBN), a pontine structure involved in the control of sodium intake. In the present study, we investigated the effects of α,β-methyleneadenosine 5'-triphosphate (α,β-methylene ATP, selective P2X purinergic agonist) alone or combined with pyridoxalphosphate-6-azophenyl-2',4'-disulfonic acid (PPADS, P2X purinergic antagonist) or suramin (non-selective P2 purinergic antagonist) injected into the LPBN on sodium depletion-induced 1.8% NaCl intake. Male Holtzman rats with stainless steel cannulas implanted into the LPBN were used. Sodium depletion was induced by treating rats with the diuretic furosemide (20mg/kg of body weight) followed by 24h of sodium-deficient diet. Bilateral injections of α,β-methylene ATP (2.0 and 4.0nmol/0.2μl) into the LPBN increased sodium depletion-induced 1.8% NaCl intake (25.3±0.8 and 26.5±0.9ml/120min, respectively, vs. saline: 15.2±1.3ml/120min). PPADS (4nmol/0.2μl) alone into the LPBN did not change 1.8% NaCl intake, however, pretreatment with PPADS into the LPBN abolished the effects of α,β-methylene ATP on 1.8% NaCl intake (16.9±0.9ml/120min). Suramin (2.0nmol/0.2μl) alone into the LPBN reduced sodium depletion-induced 1.8% NaCl intake (5.7±1.9ml/120min, vs. saline: 15.5±1.1ml/120min), without changing 2% sucrose intake or 24h water deprivation-induced water intake. The combination of suramin and α,β-methylene ATP into the LPBN produced no change of 1.8% NaCl intake (15.2±1.2ml/120min). The results suggest that purinergic P2 receptor activation in the LPBN facilitates NaCl intake, probably by restraining LPBN mechanisms that inhibit sodium intake.
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Lesions in the central amygdala impair sodium intake induced by the blockade of the lateral parabrachial nucleus. Brain Res 2010; 1332:57-64. [DOI: 10.1016/j.brainres.2010.03.055] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2009] [Revised: 03/13/2010] [Accepted: 03/15/2010] [Indexed: 11/22/2022]
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Ogihara CA, Schoorlemmer GHM, Colombari E, Sato MA. Changes in sodium appetite evoked by lesions of the commissural nucleus of the tractus solitarius. Braz J Med Biol Res 2010; 42:561-6. [PMID: 19448907 DOI: 10.1590/s0100-879x2009000600014] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2008] [Accepted: 04/13/2009] [Indexed: 11/22/2022] Open
Abstract
Ablation of the area postrema/caudal nucleus of the tractus solitarius (NTS) complex increases sodium intake, but the effect of selective lesions of the caudal NTS is not known. We measured depletion-induced sodium intake in rats with electrolytic lesions of the commissural NTS that spared the area postrema. One day after the lesion, rats were depleted of sodium with furosemide (10 mg/kg body weight, sc) and then had access to water and a sodium-deficient diet for 24 h when 1.8% NaCl was offered. Water and saline intakes were measured for 2 h. Saline intake was higher in lesioned than in sham-lesioned rats (mean +/- SEM: 20 +/- 2 vs 11 +/- 3 mL/2 h, P < 0.05, N = 6-7). Saline intake remained elevated in lesioned rats when the tests were repeated 6 and 14 days after the lesion, and water intake in these two tests was increased as well. Water intake seemed to be secondary to saline intake both in lesioned and in sham-lesioned rats. A second group of rats was offered 10% sucrose for 2 h/day before and 2, 7, and 15 days after lesion. Sucrose intake in lesioned rats was higher than in sham-lesioned rats only 7 days after lesioning. A possible explanation for the increased saline intake in rats with commissural NTS lesions could be a reduced gastrointestinal feedback inhibition. The commissural NTS is probably part of a pathway for inhibitory control of sodium intake that also involves the area postrema and the parabrachial nucleus.
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Affiliation(s)
- C A Ogihara
- Departamento de Fisiologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brasil
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41
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Andrade-Franzé G, Andrade C, De Luca L, De Paula P, Menani J. Lateral parabrachial nucleus and central amygdala in the control of sodium intake. Neuroscience 2010; 165:633-41. [DOI: 10.1016/j.neuroscience.2009.11.011] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2009] [Revised: 10/08/2009] [Accepted: 11/04/2009] [Indexed: 10/20/2022]
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42
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Adrenergic mechanisms of the Kölliker-Fuse/A7 area on the control of water and sodium intake. Neuroscience 2009; 164:370-9. [DOI: 10.1016/j.neuroscience.2009.08.048] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2009] [Revised: 08/21/2009] [Accepted: 08/22/2009] [Indexed: 11/20/2022]
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43
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Lapirot O, Chebbi R, Monconduit L, Artola A, Dallel R, Luccarini P. NK1 receptor-expressing spinoparabrachial neurons trigger diffuse noxious inhibitory controls through lateral parabrachial activation in the male rat. Pain 2009; 142:245-254. [DOI: 10.1016/j.pain.2009.01.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2008] [Revised: 01/08/2009] [Accepted: 01/13/2009] [Indexed: 02/05/2023]
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44
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Margatho L, Elias L, Antunes-Rodrigues J. GABA in the central amygdaloid nucleus modulates the electrolyte excretion and hormonal responses to blood volume expansion in rats. Braz J Med Biol Res 2009; 42:114-21. [DOI: 10.1590/s0100-879x2009000100016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2008] [Accepted: 01/15/2009] [Indexed: 11/21/2022] Open
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45
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De Oliveira L, De Luca L, Menani J. Opioid activation in the lateral parabrachial nucleus induces hypertonic sodium intake. Neuroscience 2008; 155:350-8. [DOI: 10.1016/j.neuroscience.2008.06.011] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2008] [Revised: 04/26/2008] [Accepted: 06/03/2008] [Indexed: 11/17/2022]
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46
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Sodium intake by hyperosmotic rats treated with a GABAA receptor agonist into the lateral parabrachial nucleus. Brain Res 2008; 1190:86-93. [DOI: 10.1016/j.brainres.2007.11.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2007] [Revised: 10/27/2007] [Accepted: 11/04/2007] [Indexed: 11/23/2022]
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Abstract
Thirst and the hunger for sodium containing fluids and food (i.e., sodium appetite) are the consequences of the generation of unique central nervous system states. Altered body fluid homeostasis produces sensory and perceptional changes that arise from signals generated in the body that serve as indices of body fluid balance and distribution. These signaling mechanisms activate networks of brain neurons that use specific neurochemicals to communicate between cells and process information. The brain integrates information derived from various bodily sources so that thirst and sodium appetite are in a true sense the synthetic products of the nervous system. In recent years much has been learned about the stimuli and receptor systems involved in signaling the brain to reflect the status of bodily fluids and about the central neural substrates that process such inputs to generate thirst and sodium appetite. Knowledge about the sensory nature of thirst and sodium appetite provides a basis for understanding the biological constraints under which thirst and sodium appetite operate. This information is important for appreciating the extent to which thirst and sodium appetite motivational states and behaviors can be relied on to maintain and repair disruptions of body fluid homeostasis.
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Affiliation(s)
- Alan Kim Johnson
- Department of Psychology, University of Iowa, Iowa City, IA 52242-1407, USA.
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48
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Geerling JC, Loewy AD. Sodium deprivation and salt intake activate separate neuronal subpopulations in the nucleus of the solitary tract and the parabrachial complex. J Comp Neurol 2007; 504:379-403. [PMID: 17663450 DOI: 10.1002/cne.21452] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Salt intake is an established response to sodium deficiency, but the brain circuits that regulate this behavior remain poorly understood. We studied the activation of neurons in the nucleus of the solitary tract (NTS) and their efferent target nuclei in the pontine parabrachial complex (PB) in rats during sodium deprivation and after salt intake. After 8-day dietary sodium deprivation, immunoreactivity for c-Fos (a neuronal activity marker) increased markedly within the aldosterone-sensitive neurons of the NTS, which express the enzyme 11-beta-hydroxysteroid dehydrogenase type 2 (HSD2). In the PB, c-Fos labeling increased specifically within two sites that relay signals from the HSD2 neurons to the forebrain--the pre-locus coeruleus and the innermost region of the external lateral parabrachial nucleus. Then, 1-2 hours after sodium-deprived rats ingested salt (a hypertonic 3% solution of NaCl), c-Fos immunoreactivity within the HSD2 neurons was virtually eliminated, despite a large increase in c-Fos activation in the surrounding NTS (including the A2 noradrenergic neurons) and area postrema. Also after salt intake, c-Fos activation increased within pontine nuclei that relay gustatory (caudal medial PB) and viscerosensory (rostral lateral PB) information from the NTS to the forebrain. Thus, sodium deficiency and salt intake stimulate separate subpopulations of neurons in the NTS, which then transmit this information to the forebrain via largely separate relay nuclei in the PB complex. These findings offer new perspectives on the roles of sensory information from the brainstem in the regulation of sodium appetite.
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Affiliation(s)
- Joel C Geerling
- Department of Anatomy and Neurobiology, Washington University School of Medicine, St. Louis, Missouri 63110, USA
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49
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de Oliveira LB, Callera JC, De Luca LA, Colombari DSA, Menani JV. GABAergic mechanisms of the lateral parabrachial nucleus on sodium appetite. Brain Res Bull 2007; 73:238-47. [PMID: 17562389 DOI: 10.1016/j.brainresbull.2007.03.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2006] [Revised: 02/25/2007] [Accepted: 03/14/2007] [Indexed: 11/26/2022]
Abstract
GABAergic activation in the lateral parabrachial nucleus (LPBN) induces sodium and water intake in satiated and normovolemic rats. In the present study we investigated the effects of GABAA receptor activation in the LPBN on 0.3M NaCl, water, 2% sucrose and food intake in rats submitted to sodium depletion (treatment with the diuretic furosemide subcutaneously+sodium deficient food for 24h), 24h food deprivation or 24 h water deprivation. Male Holtzman rats with bilateral stainless steel cannulas implanted into the LPBN were used. In sodium depleted rats, muscimol (GABAA receptor agonist, 0.5 nmol/0.2 microl), bilaterally injected into the LPBN, produced an inconsistent increase of water intake and two opposite effects on 0.3M NaCl intake: an early inhibition (4.3+/-2.7 versus saline: 14.4+/-1.0 ml/15 min) and a late facilitation (37.6+/-2.7 versus saline: 21.1+/-0.9 ml/180 min). The pretreatment of the LPBN with bicuculline (GABAA receptor antagonist, 1.6 nmol) abolished these effects of muscimol. Muscimol into the LPBN also reduced food deprivation-induced food intake in the first 30 min of test (1.7+/-0.6g versus saline: 4.1+/-0.6g), without changing water deprivation-induced water intake or 2% sucrose intake in sodium depleted rats. Therefore, although GABAA receptors in the LPBN are not tonically involved in the control of sodium depletion-induced sodium intake, GABAA receptor activation in the LPBN produces an early inhibition and a late facilitation of sodium depletion-induced sodium intake. GABAA activation in the LPBN also inhibits food intake, while it consistently increases only sodium intake and not water, food or sucrose intake.
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Affiliation(s)
- Lisandra B de Oliveira
- Department of Physiology and Pathology, School of Dentistry, UNESP, Rua Humaitá 1680, 14801-903 Araraquara, SP, Brazil
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50
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De Gobbi JIF, Martinez G, Barbosa SP, Beltz TG, De Luca LA, Thunhorst RL, Johnson AK, Vanderlei Menani J. 5-HT2 and 5-HT3 receptors in the lateral parabrachial nucleus mediate opposite effects on sodium intake. Neuroscience 2007; 146:1453-61. [PMID: 17434681 DOI: 10.1016/j.neuroscience.2007.03.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2006] [Revised: 02/05/2007] [Accepted: 03/08/2007] [Indexed: 11/27/2022]
Abstract
The present study investigated the role of several 5-HT receptor subtypes in the lateral parabrachial nucleus (LPBN) in the control of sodium appetite (i.e. NaCl consumption). Male Holtzman rats had cannulas implanted bilaterally into the LPBN for the injection of 5-HT receptor agonists and antagonists in conjunction with either acute fluid depletion or 24-h sodium depletion. Following these treatments, access to 0.3 M NaCl was provided and the intakes of saline and water were measured for the next 2 h. Bilateral injections of the 5-HT2A receptor antagonist, ketanserin or the 5-HT2C receptor antagonist, mianserin into the LPBN increased 0.3 M NaCl intake without affecting water intake induced by acute fluid-depletion. Bilateral injections of the 5-HT2B receptor agonist, BW723C86 hydrochloride, had no effect on 0.3 M NaCl or water intake under these conditions. Treatment of the LPBN with the 5-HT2B/2C receptor agonist, 2-(2-methyl-4-clorophenoxy) propanoic acid (mCPP) caused dose-related reductions in 0.3 M NaCl intake after 24 h sodium depletion. The effects of mCPP were prevented by pretreating the LPBN with the 5-HT2B/2C receptor antagonist, SDZSER082. Activation of 5-HT3 receptors by the receptor agonist, 1-phenylbiguanide (PBG) caused dose-related increases in 0.3 M NaCl intake. Pretreatment of the LPBN with the 5-HT3 receptor antagonist, 1-methyl-N-[8-methyl-8-azabicyclo (3.2.1)-oct-3-yl]-1H-indazole-3-carboxamide (LY-278,584) abolished the effects of PBG, but LY-278,584 had no effects on sodium or water intake when injected by itself. PBG injected into the LPBN did not alter intake of palatable 0.06 M sucrose in fluid replete rats. The results suggest that activation of the 5-HT2A and 5-HT2C receptor subtypes inhibits sodium ingestion. In contrast, activation of the 5-HT3 receptor subtype increases sodium ingestion. Therefore, multiple serotonergic receptor subtypes in the LPBN are implicated in the control of sodium intake, sometimes by mediating opposite effects of 5-HT. The results provide new information concerning the control of sodium intake by LPBN mechanisms.
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Affiliation(s)
- J I F De Gobbi
- Department of Physiology, Bioscience Institute, Paulista State University (UNESP), Distrito de Rubião Junior, s/n, 18618-000 Botucatu, SP, Brazil.
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