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Guedes MR, de Noronha SISR, Chírico MTT, da Costa GDC, de Freitas Castro T, de Brito RCF, Vieira LG, Reis TO, Ribeiro MC, Reis AB, Carneiro CM, Bezerra FS, Montano N, da Silva VJD, de Menezes RCA, Chianca-Jr DA, Silva FCDS. Ivabradine restores tonic cardiovascular autonomic control and reduces tachycardia, hypertension and left ventricular inflammation in post-weaning protein malnourished rats. Life Sci 2024; 346:122636. [PMID: 38614307 DOI: 10.1016/j.lfs.2024.122636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 03/22/2024] [Accepted: 04/10/2024] [Indexed: 04/15/2024]
Abstract
Malnutrition results in autonomic imbalance and heart hypertrophy. Overexpression of hyperpolarization-activated cyclic nucleotide-gated channels (HCN) in the left ventricles (LV) is linked to hypertrophied hearts and abnormal myocardium automaticity. Given that ivabradine (IVA) has emerging pleiotropic effects, in addition to the widely known bradycardic response, this study evaluated if IVA treatment could repair the autonomic control and cardiac damages in malnourished rats. AIM Assess the impact of IVA on tonic cardiovascular autonomic control and its relationship with hemodynamics regulation, LV inflammation, and HCN gene expression in post-weaning protein malnutrition condition. MAIN METHODS After weaning, male rats were divided into control (CG; 22 % protein) and malnourished (MG; 6 % protein) groups. At 35 days, groups were subdivided into CG-PBS, CG-IVA, MG-PBS and MG-IVA (PBS 1 ml/kg or IVA 1 mg/kg) received during 8 days. We performed jugular vein cannulation and electrode implant for drug delivery and ECG registration to assess tonic cardiovascular autonomic control; femoral cannulation for blood pressure (BP) and heart rate (HR) assessment; and LV collection to evaluate ventricular remodeling and HCN gene expression investigation. KEY FINDINGS Malnutrition induced BP and HR increases, sympathetic system dominance, and LV remodeling without affecting HCN gene expression. IVA reversed the cardiovascular autonomic imbalance; prevented hypertension and tachycardia; and inhibited the LV inflammatory process and fiber thickening caused by malnutrition. SIGNIFICANCE Our findings suggest that ivabradine protects against malnutrition-mediated cardiovascular damage. Moreover, our results propose these effects were not attributed to HCN expression changes, but rather to IVA pleiotropic effects on autonomic control and inflammation.
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Affiliation(s)
- Mariana Reis Guedes
- Department of Biological Sciences, Institute of Exact and Biological Sciences, Federal University of Ouro Preto, Ouro Preto, MG, Brazil; Graduate Program in Biological Sciences - CBIOL/NUPEB, Federal University of Ouro Preto, Ouro Preto, Brazil.
| | - Sylvana Izaura Salyba Rendeiro de Noronha
- Department of Biological Sciences, Institute of Exact and Biological Sciences, Federal University of Ouro Preto, Ouro Preto, MG, Brazil; Graduate Program in Biological Sciences - CBIOL/NUPEB, Federal University of Ouro Preto, Ouro Preto, Brazil.
| | - Máira Tereza Talma Chírico
- Department of Biological Sciences, Institute of Exact and Biological Sciences, Federal University of Ouro Preto, Ouro Preto, MG, Brazil; Graduate Program in Biological Sciences - CBIOL/NUPEB, Federal University of Ouro Preto, Ouro Preto, Brazil.
| | - Gabriela Dias Carvalho da Costa
- Department of Biological Sciences, Institute of Exact and Biological Sciences, Federal University of Ouro Preto, Ouro Preto, MG, Brazil; Graduate Program in Biological Sciences - CBIOL/NUPEB, Federal University of Ouro Preto, Ouro Preto, Brazil.
| | - Thalles de Freitas Castro
- Department of Biological Sciences, Institute of Exact and Biological Sciences, Federal University of Ouro Preto, Ouro Preto, MG, Brazil; Graduate Program in Biological Sciences - CBIOL/NUPEB, Federal University of Ouro Preto, Ouro Preto, Brazil.
| | - Rory Cristiane Fortes de Brito
- Department of Biological Sciences, Institute of Exact and Biological Sciences, Federal University of Ouro Preto, Ouro Preto, MG, Brazil; Graduate Program in Biological Sciences - CBIOL/NUPEB, Federal University of Ouro Preto, Ouro Preto, Brazil.
| | - Lucas Gabriel Vieira
- Department of Biological Sciences, Institute of Exact and Biological Sciences, Federal University of Ouro Preto, Ouro Preto, MG, Brazil; Graduate Program in Biological Sciences - CBIOL/NUPEB, Federal University of Ouro Preto, Ouro Preto, Brazil.
| | - Thayane Oliveira Reis
- Department of Biological Sciences, Institute of Exact and Biological Sciences, Federal University of Ouro Preto, Ouro Preto, MG, Brazil; Graduate Program in Biological Sciences - CBIOL/NUPEB, Federal University of Ouro Preto, Ouro Preto, Brazil.
| | - Marcelo Carlos Ribeiro
- Statistics Department, Institute of Exact and Biological Sciences, Federal University of Ouro Preto, Ouro Preto, Brazil.
| | - Alexandre Barbosa Reis
- Department of Biological Sciences, Institute of Exact and Biological Sciences, Federal University of Ouro Preto, Ouro Preto, MG, Brazil; Graduate Program in Biological Sciences - CBIOL/NUPEB, Federal University of Ouro Preto, Ouro Preto, Brazil.
| | - Cláudia Martins Carneiro
- Department of Biological Sciences, Institute of Exact and Biological Sciences, Federal University of Ouro Preto, Ouro Preto, MG, Brazil; Graduate Program in Biological Sciences - CBIOL/NUPEB, Federal University of Ouro Preto, Ouro Preto, Brazil.
| | - Frank Silva Bezerra
- Department of Biological Sciences, Institute of Exact and Biological Sciences, Federal University of Ouro Preto, Ouro Preto, MG, Brazil; Graduate Program in Biological Sciences - CBIOL/NUPEB, Federal University of Ouro Preto, Ouro Preto, Brazil.
| | - Nicola Montano
- Department of Clinical Sciences and Community Health, IRCCS Ca' Granda Foundation, Ospedale Maggiore Policlinico, University of Milan, Milan, Italy.
| | - Valdo José Dias da Silva
- Department of Biochemistry, Pharmacology and Physiology, Federal University of Triângulo Mineiro, Uberaba, MG, Brazil; Graduate Program in Physiological Sciences, Federal University of Triângulo Mineiro, Uberaba, MG, Brazil.
| | - Rodrigo Cunha Alvim de Menezes
- Department of Biological Sciences, Institute of Exact and Biological Sciences, Federal University of Ouro Preto, Ouro Preto, MG, Brazil; Graduate Program in Biological Sciences - CBIOL/NUPEB, Federal University of Ouro Preto, Ouro Preto, Brazil.
| | - Deoclécio Alves Chianca-Jr
- Department of Biological Sciences, Institute of Exact and Biological Sciences, Federal University of Ouro Preto, Ouro Preto, MG, Brazil; Graduate Program in Biological Sciences - CBIOL/NUPEB, Federal University of Ouro Preto, Ouro Preto, Brazil.
| | - Fernanda Cacilda Dos Santos Silva
- Department of Biological Sciences, Institute of Exact and Biological Sciences, Federal University of Ouro Preto, Ouro Preto, MG, Brazil; Graduate Program in Biological Sciences - CBIOL/NUPEB, Federal University of Ouro Preto, Ouro Preto, Brazil.
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Xie X, Chen Y, Gan W, Liang C, Zuo Q, Zhou Y, Cheng Y, Wang X, Luo Z, Tang S, Ling Y. Relationship Between Prognostic Nutritional Index and New-Onset Atrial Fibrillation in Patients with Acute ST-Elevation Myocardial Infarction Following Percutaneous Coronary Intervention. Int Heart J 2023; 64:543-550. [PMID: 37460321 DOI: 10.1536/ihj.22-647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 08/01/2023]
Abstract
Multiple reports relate new-onset atrial fibrillation (NOAF) to poor clinical outcomes in patients with ST-elevation myocardial infarction (STEMI) who received percutaneous coronary intervention (PCI). The prognostic nutritional index (PNI) is a reliable indicator of immunonutritional-inflammatory status, and it is linked to clinical outcomes in cardiovascular disease patients. This research aims to explore the relationship between NOAF and PNI.Overall, 600 STEMI patients treated with PCI were recruited for this retrospective analysis. The patients were categorized into the NOAF group or sinus rhythm (SR) group. Logistic regression and receiver operating characteristic (ROC) curve analyses were conducted to assess PNI estimation. Lastly, the Kaplan-Meier curve was used to compare all-cause mortality between both groups.The combined NOAF incidence in PCI-treated STEMI patients was 7.7%. PNI was independently correlated with NOAF using multivariate regression analyses (odds ratio [OR], 0.824; 95% confidence interval [CI], 0.750-0.906; P < 0.001). In ROC curve analyses, the best PNI threshold value for predicting NOAF was 40.1, with sensitivity, and specificity of 76.09% and 71.30%, respectively area under the curve, 0.787; 95% CI, 0.752-0.819; P < 0.001). After a median of 41-month follow-up, the Kaplan-Meier curve revealed that the NOAF patients displayed an elevated all-cause death incidence compared with SR patients, with a log-rank of P = 0.005.This study demonstrated that PNI is an independent predictor of NOAF in STEMI patients during hospitalization after PCI, which is strongly correlated with a poor outcome upon discharge.
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Affiliation(s)
- Xiangrong Xie
- Department of Cardiology, Yijishan Hospital, Wannan Medical College
| | - Yan Chen
- Department of Cardiology, Taishan People's Hospital
| | - Weipeng Gan
- Department of Cardiology, Yijishan Hospital, Wannan Medical College
| | - Cheng Liang
- Department of Cardiology, Yijishan Hospital, Wannan Medical College
| | - Quan Zuo
- Department of Cardiology, Yijishan Hospital, Wannan Medical College
| | - Yimeng Zhou
- Department of Cardiology, Yijishan Hospital, Wannan Medical College
| | - Yuliang Cheng
- Department of Cardiology, Yijishan Hospital, Wannan Medical College
| | - Xinyu Wang
- Department of Cardiology, Yijishan Hospital, Wannan Medical College
| | - Zhimin Luo
- Department of Cardiology, Yijishan Hospital, Wannan Medical College
| | - Shengxing Tang
- Department of Cardiology, Yijishan Hospital, Wannan Medical College
| | - Yang Ling
- Department of Cardiology, Yijishan Hospital, Wannan Medical College
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Duan W, Ye P, Leng YQ, Liu DH, Sun JC, Tan X, Wang WZ. Oxidative stress in the RVLM mediates sympathetic hyperactivity induced by circadian disruption. Neurosci Lett 2022; 791:136917. [DOI: 10.1016/j.neulet.2022.136917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 10/11/2022] [Accepted: 10/11/2022] [Indexed: 11/24/2022]
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Ferreira ARO, Ribeiro MVG, Peres MNC, Piovan S, Gonçalves GD, Saavedra LPJ, Martins JNDL, Junior MDF, Cavalcante KVN, Lopes GKG, Carneiro M, Almeida DL, Gomes RM, Comar JF, Armitage JA, Mathias PCDF, Palma-Rigo K. Protein Restriction in the Peri-Pubertal Period Induces Autonomic Dysfunction and Cardiac and Vascular Structural Changes in Adult Rats. Front Physiol 2022; 13:840179. [PMID: 35574445 PMCID: PMC9095958 DOI: 10.3389/fphys.2022.840179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 03/22/2022] [Indexed: 11/30/2022] Open
Abstract
Perturbations to nutrition during critical periods are associated with changes in embryonic, fetal or postnatal developmental patterns that may render the offspring more likely to develop cardiovascular disease in later life. The aim of this study was to evaluate whether autonomic nervous system imbalance underpins in the long-term hypertension induced by dietary protein restriction during peri-pubertal period. Male Wistar rats were assigned to groups fed with a low protein (4% protein, LP) or control diet (20.5% protein; NP) during peri-puberty, from post-natal day (PN) 30 until PN60, and then all were returned to a normal protein diet until evaluation of cardiovascular and autonomic function at PN120. LP rats showed long-term increased mean arterial pressure (p = 0.002) and sympathetic arousal; increased power of the low frequency (LF) band of the arterial pressure spectral (p = 0.080) compared with NP animals. The depressor response to the ganglion blocker hexamethonium was increased in LP compared with control animals (p = 0.006). Pulse interval variability showed an increase in the LF band and LF/HF ratio (p = 0.062 and p = 0.048) in LP animals. The cardiac response to atenolol and/or methylatropine and the baroreflex sensitivity were similar between groups. LP animals showed ventricular hypertrophy (p = 0.044) and increased interstitial fibrosis (p = 0.028) compared with controls. Reduced protein carbonyls (PC) (p = 0.030) and catalase activity (p = 0.001) were observed in hearts from LP animals compared with control. In the brainstem, the levels of PC (p = 0.002) and the activity of superoxide dismutase and catalase (p = 0.044 and p = 0.012) were reduced in LP animals, while the levels of GSH and total glutathione were higher (p = 0.039 and p = 0.038) compared with NP animals. Protein restriction during peri-pubertal period leads to hypertension later in life accompanied by sustained sympathetic arousal, which may be associated with a disorganization of brain and cardiac redox state and structural cardiac alteration.
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Affiliation(s)
- Anna Rebeka Oliveira Ferreira
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringa, Maringa, Brazil
| | - Maiara Vanusa Guedes Ribeiro
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringa, Maringa, Brazil
| | - Maria Natalia Chimirri Peres
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringa, Maringa, Brazil
| | - Silvano Piovan
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringa, Maringa, Brazil
| | - Géssica Dutra Gonçalves
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringa, Maringa, Brazil
| | - Lucas Paulo Jacinto Saavedra
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringa, Maringa, Brazil
| | - Juliana Nunes de Lima Martins
- Laboratory of Liver Metabolism and Radioisotopes, Department of Biochemistry, State University of Maringa, Maringa, Brazil
| | - Marcos Divino Ferreira Junior
- Laboratory of Endocrine Physiology and Metabolism, Department of Physiological Sciences, Federal University of Goias, Goiania, Brazil
| | - Keilah Valeria Naves Cavalcante
- Laboratory of Endocrine Physiology and Metabolism, Department of Physiological Sciences, Federal University of Goias, Goiania, Brazil
| | - Gabriel kian Guimarães Lopes
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringa, Maringa, Brazil
| | - Mariane Carneiro
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringa, Maringa, Brazil
| | - Douglas Lopes Almeida
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringa, Maringa, Brazil
| | - Rodrigo Mello Gomes
- Laboratory of Endocrine Physiology and Metabolism, Department of Physiological Sciences, Federal University of Goias, Goiania, Brazil
| | - Jurandir Fernando Comar
- Laboratory of Liver Metabolism and Radioisotopes, Department of Biochemistry, State University of Maringa, Maringa, Brazil
| | | | - Paulo Cezar de Freitas Mathias
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringa, Maringa, Brazil
| | - Kesia Palma-Rigo
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringa, Maringa, Brazil
- Adventist College of Parana, Ivatuba, Brazil
- *Correspondence: Kesia Palma-Rigo,
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5
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De Souza AMA, Linares A, Speth RC, Campos GV, Ji H, Chianca D, Sandberg K, De Menezes RCA. Severe food restriction activates the central renin angiotensin system. Physiol Rep 2020; 8:e14338. [PMID: 31925945 PMCID: PMC6954120 DOI: 10.14814/phy2.14338] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
We previously showed that 2 weeks of a severe food restricted (sFR) diet (40% of the caloric intake of the control (CT) diet) up‐regulated the circulating renin angiotensin (Ang) system (RAS) in female Fischer rats, most likely as a result of the fall in plasma volume. In this study, we investigated the role of the central RAS in the mean arterial pressure (MAP) and heart rate (HR) dysregulation associated with sFR. Although sFR reduced basal mean MAP and HR, the magnitude of the pressor response to intracerebroventricular (icv) microinjection of Ang‐[1‐8] was not affected; however, HR was 57 ± 13 bpm lower 26 min after Ang‐[1‐8] microinjection in the sFR rats and a similar response was observed after losartan was microinjected. The major catabolic pathway of Ang‐[1‐8] in the hypothalamus was via Ang‐[1‐7]; however, no differences were detected in the rate of Ang‐[1‐8] synthesis or degradation between CT and sFR animals. While sFR had no effect on the AT1R binding in the subfornical organ (SFO), the organum vasculosum laminae terminalis (OVLT) and median preoptic nucleus (MnPO) of the paraventricular anteroventral third ventricle, ligand binding increased 1.4‐fold in the paraventricular nucleus (PVN) of the hypothalamus. These findings suggest that sFR stimulates the central RAS by increasing AT1R expression in the PVN as a compensatory response to the reduction in basal MAP and HR. These findings have implications for people experiencing a period of sFR since an activated central RAS could increase their risk of disorders involving over activation of the RAS including renal and cardiovascular diseases.
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Affiliation(s)
| | - Andrea Linares
- Department of Pharmaceutical Sciences, College of Pharmacy, Nova Southeastern University, Fort Lauderdale, FL, USA
| | - Robert C Speth
- Division of Nephrology & Hypertension, Department of Medicine, Georgetown University, Washington, DC, USA.,Department of Pharmaceutical Sciences, College of Pharmacy, Nova Southeastern University, Fort Lauderdale, FL, USA
| | - Glenda V Campos
- Division of Nephrology & Hypertension, Department of Medicine, Georgetown University, Washington, DC, USA
| | - Hong Ji
- Division of Nephrology & Hypertension, Department of Medicine, Georgetown University, Washington, DC, USA
| | - Deoclécio Chianca
- Departamento de Ciências Biológicas, Instituto de Ciências Exatas e Biológicas, Universidade, Federal de Ouro Preto, Ouro Preto, Brazil
| | - Kathryn Sandberg
- Division of Nephrology & Hypertension, Department of Medicine, Georgetown University, Washington, DC, USA
| | - Rodrigo C A De Menezes
- Departamento de Ciências Biológicas, Instituto de Ciências Exatas e Biológicas, Universidade, Federal de Ouro Preto, Ouro Preto, Brazil
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Barros MADV, de Brito Alves JL, Barros RGN, Santana E Silva M, Nasser S, Tourneur Y, Leandro CVG, Vidal H, Pirola L, Costa-Silva JH. Effects of maternal protein restriction on central and peripheral renin-angiotensin systems in male rat offspring. Life Sci 2020; 263:118574. [PMID: 33049280 DOI: 10.1016/j.lfs.2020.118574] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 09/26/2020] [Accepted: 10/04/2020] [Indexed: 11/18/2022]
Abstract
AIMS We investigated the involvement of the renin angiotensin system (RAS) on the cardiorespiratory control in rats from dams fed with a low-protein diet. MAIN METHODS Male offspring were obtained from dams fed a normoprotein diet (NP, 17% casein) and low-protein diet (LP, 8% casein) during pregnancy and lactation. Direct measurements of arterial pressure (AP), heart rate (HR) and respiratory frequency (RF) were recorded in awake 90-day-old at resting and after losartan potassium through either intracerebroventricular (ICV) microinjections or intravenous (IV) administration. Cardiovascular variability was evaluated by spectral analysis. Peripheral chemoreflex sensitivity was assessed through the potassium cyanide (KCN; 40 μg/0.1 ml/rat, IV). Gene expression was evaluated by qPCR, and MAPK (Mitogen Activated Protein Kinase) expression was evaluated by western blot. KEY FINDINGS The LP offspring had higher mean AP (MAP) and RF than NP offspring. In the spectral analysis, the LP rats also showed higher low frequency of systolic AP (NP: 2.7 ± 0.3 vs. LP: 5.0 ± 1.0 mmHg). After ICV losartan, MAP and RF in LP rats remained higher than those in NP rats, but without changes in HR. The peripheral chemoreflex was similar between the groups. LP group had lower gene expression of Rac1 (Ras-related C3 botulinum toxin substrate 1) (NP: 1.13 ± 0.06 vs. LP: 0.88 ± 0.08). Peripherally, LP rats had larger delta of MAP after IV losartan (NP: -9.8 ± 2 vs. LP: -23 ± 6 mmHg), without changes in HR and RF. SIGNIFICANCE In rats, the RAS participates peripherally, but not centrally, in the maintenance of arterial hypertension in male offspring induced by maternal protein restriction.
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Affiliation(s)
- Monique Assis de Vasconcelos Barros
- Laboratory of Nutrition, Physical Activity and Phenotypic Plasticity, Academic Center of Vitoria (CAV), Federal University of Pernambuco, 55608-680 Vitória de Santo Antão, Brazil; Graduate Program in Nutrition, Health Sciences Center, Federal University of Pernambuco, UFPE, 50670-901, Recife, Brazil; Carmen (Cardiology, Metabolism and Nutrition) Laboratory, INSERM U1060, Lyon-1 University, South Lyon Medical Faculty, 69921 Oullins, France
| | - José Luiz de Brito Alves
- Department of Nutrition, Health Sciences Center, Federal University of Paraíba, UFPB, João Pessoa 58051900, Brazil
| | - Rayssa Gabriella Nery Barros
- Laboratory of Nutrition, Physical Activity and Phenotypic Plasticity, Academic Center of Vitoria (CAV), Federal University of Pernambuco, 55608-680 Vitória de Santo Antão, Brazil
| | - Manuel Santana E Silva
- Laboratory of Nutrition, Physical Activity and Phenotypic Plasticity, Academic Center of Vitoria (CAV), Federal University of Pernambuco, 55608-680 Vitória de Santo Antão, Brazil
| | - Souad Nasser
- Carmen (Cardiology, Metabolism and Nutrition) Laboratory, INSERM U1060, Lyon-1 University, South Lyon Medical Faculty, 69921 Oullins, France
| | - Yves Tourneur
- Carmen (Cardiology, Metabolism and Nutrition) Laboratory, INSERM U1060, Lyon-1 University, South Lyon Medical Faculty, 69921 Oullins, France
| | - Carol Virgínia Gois Leandro
- Laboratory of Nutrition, Physical Activity and Phenotypic Plasticity, Academic Center of Vitoria (CAV), Federal University of Pernambuco, 55608-680 Vitória de Santo Antão, Brazil; Graduate Program in Nutrition, Health Sciences Center, Federal University of Pernambuco, UFPE, 50670-901, Recife, Brazil
| | - Hubert Vidal
- Carmen (Cardiology, Metabolism and Nutrition) Laboratory, INSERM U1060, Lyon-1 University, South Lyon Medical Faculty, 69921 Oullins, France
| | - Luciano Pirola
- Laboratory of Nutrition, Physical Activity and Phenotypic Plasticity, Academic Center of Vitoria (CAV), Federal University of Pernambuco, 55608-680 Vitória de Santo Antão, Brazil; Carmen (Cardiology, Metabolism and Nutrition) Laboratory, INSERM U1060, Lyon-1 University, South Lyon Medical Faculty, 69921 Oullins, France
| | - João Henrique Costa-Silva
- Laboratory of Nutrition, Physical Activity and Phenotypic Plasticity, Academic Center of Vitoria (CAV), Federal University of Pernambuco, 55608-680 Vitória de Santo Antão, Brazil; Graduate Program in Nutrition, Health Sciences Center, Federal University of Pernambuco, UFPE, 50670-901, Recife, Brazil; Carmen (Cardiology, Metabolism and Nutrition) Laboratory, INSERM U1060, Lyon-1 University, South Lyon Medical Faculty, 69921 Oullins, France.
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de Souza AMA, Ji H, Wu X, Sandberg K, West CA. Persistent Renin-Angiotensin System Sensitization Months After Body Weight Recovery From Severe Food Restriction in Female Fischer Rats. J Am Heart Assoc 2020; 9:e017246. [PMID: 32674648 PMCID: PMC7660733 DOI: 10.1161/jaha.120.017246] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Background Prior exposure to periods of severe food restriction (sFR) is associated with increased risk of developing hypertension and cardiovascular disease later in life. Methods and Results To investigate the mechanism of these long-term adverse effects of sFR, 4-month-old female Fischer rats were divided in 2 groups and maintained on a normal diet ad libitum (control) or on an sFR diet with 60% reduction in daily food intake for 2 weeks that resulted in a 15% reduction in body weight. After the 2-week sFR period ended, both groups received normal chow ad libitum for 3 months. Within 2 weeks after refeeding was initiated in the sFR group, body weight was restored to control levels; however, plasma angiotensinogen (1.3-fold; P<0.05), Ang-[1-8] (2.0-fold; P<0.05), and angiotensin-converting enzyme activity (1.1-fold; P<0.01) were all elevated 3 months after refeeding. Angiotensin type 1 receptor activity was also increased as evidenced by augmented pressor responses to angiotensin-[1-8] (P<0.01) and depressor responses to the angiotensin type 1 receptor antagonist, losartan (P<0.01) in the sFR group. Conclusions These results indicate that sensitization of the renin-angiotensin system persisted months after the sFR period ended. These findings may have implications for women who voluntarily or involuntarily experience an extended period of sFR and thus may be at increased risk of developing cardiovascular disease through sensitization of the renin-angiotensin system even though their body weight, mean arterial pressure, and heart rate appear normal.
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Affiliation(s)
| | - Hong Ji
- Department of Medicine Georgetown University Washington DC
| | - Xie Wu
- Department of Medicine Georgetown University Washington DC
| | | | - Crystal A West
- Department of Medicine Georgetown University Washington DC
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8
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de Souza AMA, West CA, de Abreu ARR, Pai AV, Mesquita LBT, Ji H, Chianca D, de Menezes RCA, Sandberg K. Role of the Renin Angiotensin System in Blood Pressure Allostasis-induced by Severe Food Restriction in Female Fischer rats. Sci Rep 2018; 8:10327. [PMID: 29985423 PMCID: PMC6037681 DOI: 10.1038/s41598-018-28593-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Accepted: 06/26/2018] [Indexed: 01/02/2023] Open
Abstract
Severe food restriction (FR) is associated with blood pressure (BP) and cardiovascular dysfunction. The renin-angiotensin system (RAS) regulates BP and its dysregulation contributes to impaired cardiovascular function. Female Fischer rats were maintained on a control (CT) or severe FR (40% of CT) diet for 14 days. In response to severe FR, BP allostasis was achieved by up-regulating circulating Ang-[1–8] by 1.3-fold through increased angiotensin converting enzyme (ACE) activity and by increasing the expression of AT1Rs 1.7-fold in mesenteric vessels. Activation of the RAS countered the depressor effect of the severe plasma volume reduction (≥30%). The RAS, however, still underperformed as evidenced by reduced pressor responses to Ang-[1–8] even though AT1Rs were still responsive to the depressor effects of an AT1R antagonist. The aldosterone (ALDO) response was also inadequate as no changes in plasma ALDO were observed after the large fall in plasma volume. These findings have implications for individuals who have experienced a period(s) of severe FR (e.g., anorexia nervosa, dieters, natural disasters) and suggests increased activity of the RAS in order to achieve allostasis contributes to the cardiovascular dysfunction associated with inadequate food intake.
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Affiliation(s)
- Aline Maria Arlindo de Souza
- Department of Medicine, Georgetown University, Washington, DC, 20057, USA. .,Departamento de Ciências Biológicas, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, 35460-000, Brazil.
| | - Crystal A West
- Department of Medicine, Georgetown University, Washington, DC, 20057, USA
| | | | - Amrita V Pai
- Department of Biochemistry, Molecular and Cellular Biology, Georgetown University, Washington, DC, 20057, USA
| | - Laura Batista Tavares Mesquita
- Departamento de Ciências Biológicas, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, 35460-000, Brazil
| | - Hong Ji
- Department of Medicine, Georgetown University, Washington, DC, 20057, USA
| | - Deoclécio Chianca
- Departamento de Ciências Biológicas, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, 35460-000, Brazil
| | - Rodrigo Cunha Alvim de Menezes
- Departamento de Ciências Biológicas, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, 35460-000, Brazil
| | - Kathryn Sandberg
- Department of Medicine, Georgetown University, Washington, DC, 20057, USA
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Thangaratnarajah C, Dinger K, Vohlen C, Klaudt C, Nawabi J, Lopez Garcia E, Kwapiszewska G, Dobner J, Nüsken KD, van Koningsbruggen-Rietschel S, von Hörsten S, Dötsch J, Alejandre Alcázar MA. Novel role of NPY in neuroimmune interaction and lung growth after intrauterine growth restriction. Am J Physiol Lung Cell Mol Physiol 2017; 313:L491-L506. [PMID: 28572154 DOI: 10.1152/ajplung.00432.2016] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Revised: 05/02/2017] [Accepted: 05/26/2017] [Indexed: 01/21/2023] Open
Abstract
Individuals with intrauterine growth restriction (IUGR) are at risk for chronic lung disease. Using a rat model, we showed in our previous studies that altered lung structure is related to IL-6/STAT3 signaling. As neuropeptide Y (NPY), a coneurotransmitter of the sympathetic nervous system, regulates proliferation and immune response, we hypothesized that dysregulated NPY after IUGR is linked to IL-6, impaired myofibroblast function, and alveolar growth. IUGR was induced in rats by isocaloric low-protein diet; lungs were analyzed on embryonic day (E) 21, postnatal day (P) 3, P12, and P23. Finally, primary neonatal lung myofibroblasts (pnF) and murine embryonic fibroblasts (MEF) were used to assess proliferation, apoptosis, migration, and IL-6 expression. At E21, NPY and IL-6 expression was decreased, and AKT/PKC and STAT3/AMPKα signaling was reduced. Early reduction of NPY/IL-6 was associated with increased chord length in lungs after IUGR at P3, indicating reduced alveolar formation. At P23, however, IUGR rats exhibited a catch-up of body weight and alveolar growth coupled with more proliferating myofibroblasts. These structural findings after IUGR were linked to activated NPY/PKC, IL-6/AMPKα signaling. Complementary, IUGR-pnF showed increased survival, impaired migration, and reduced IL-6 compared with control-pnF (Co-pnF). In contrast, NPY induced proliferation, migration, and increased IL-6 synthesis in fibroblasts. Additionally, NPY-/- mice showed reduced IL-6 signaling and less proliferation of lung fibroblasts. Our study presents a novel role of NPY during alveolarization: NPY regulates 1) IL-6 and lung STAT3/AMPKα signaling, and 2) proliferation and migration of myofibroblasts. These new insights in pulmonary neuroimmune interaction offer potential strategies to enable lung growth.
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Affiliation(s)
- Chansutha Thangaratnarajah
- Translational Experimental Pediatrics, Experimental Pulmonology, University Hospital for Pediatrics and Adolescent Medicine, Faculty of Medicine, University of Cologne, Cologne, Germany
| | - Katharina Dinger
- Translational Experimental Pediatrics, Experimental Pulmonology, University Hospital for Pediatrics and Adolescent Medicine, Faculty of Medicine, University of Cologne, Cologne, Germany
| | - Christina Vohlen
- Translational Experimental Pediatrics, Experimental Pulmonology, University Hospital for Pediatrics and Adolescent Medicine, Faculty of Medicine, University of Cologne, Cologne, Germany.,University Hospital for Pediatrics and Adolescent Medicine, Faculty of Medicine, University of Cologne, Cologne, Germany
| | - Christian Klaudt
- Translational Experimental Pediatrics, Experimental Pulmonology, University Hospital for Pediatrics and Adolescent Medicine, Faculty of Medicine, University of Cologne, Cologne, Germany
| | - Jawed Nawabi
- Translational Experimental Pediatrics, Experimental Pulmonology, University Hospital for Pediatrics and Adolescent Medicine, Faculty of Medicine, University of Cologne, Cologne, Germany
| | - Eva Lopez Garcia
- Translational Experimental Pediatrics, Experimental Pulmonology, University Hospital for Pediatrics and Adolescent Medicine, Faculty of Medicine, University of Cologne, Cologne, Germany
| | | | - Julia Dobner
- Experimental Therapy, Preclinical Centre, University Hospital Erlangen, Erlangen, Germany
| | - Kai D Nüsken
- University Hospital for Pediatrics and Adolescent Medicine, Faculty of Medicine, University of Cologne, Cologne, Germany
| | - Silke van Koningsbruggen-Rietschel
- Pediatric Pulmonology, University Hospital for Pediatrics and Adolescent Medicine, Faculty of Medicine, University of Cologne, Cologne, Germany; and
| | - Stephan von Hörsten
- Experimental Therapy, Preclinical Centre, University Hospital Erlangen, Erlangen, Germany
| | - Jörg Dötsch
- University Hospital for Pediatrics and Adolescent Medicine, Faculty of Medicine, University of Cologne, Cologne, Germany
| | - Miguel A Alejandre Alcázar
- Translational Experimental Pediatrics, Experimental Pulmonology, University Hospital for Pediatrics and Adolescent Medicine, Faculty of Medicine, University of Cologne, Cologne, Germany; .,University Hospital for Pediatrics and Adolescent Medicine, Faculty of Medicine, University of Cologne, Cologne, Germany
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Sá RWM, Haibara AS, Gomes PM, Aguiar GL, Nascimento RSL, Pedrosa ML, Alzamora AC, de Oliveira LB, Cardoso LM. Changes in cardiovascular responses to chemoreflex activation of rats recovered from protein restriction are not related to AT 1 receptors. Exp Physiol 2017; 102:34-47. [PMID: 27763697 DOI: 10.1113/ep085791] [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: 03/12/2016] [Accepted: 10/17/2016] [Indexed: 12/18/2022]
Abstract
NEW FINDINGS What is the central question of this study? In this study, we sought to investigate whether cardiovascular responses to peripheral chemoreflex activation of rats recovered from protein restriction are related to activation of AT1 receptors. What is the main finding and its importance? This study highlights the fact that angiotensinergic mechanisms activated by AT1 receptors do not support increased responses to peripheral chemoreflex activation by KCN in rats recovered from protein restriction. Also, we found that protein restriction led to increased resting ventilation in adult rats, even after recovery. The effects of a low-protein diet followed by recovery on cardiorespiratory responses to peripheral chemoreflex activation were tested before and after systemic angiotensin II type 1 (AT1 ) receptor antagonism. Male Fischer rats were divided into control and recovered (R-PR) groups after weaning. The R-PR rats were fed a low-protein (8%) diet for 35 days and recovered with a normal protein (20%) diet for 70 days. Control rats received a normal protein diet for 105 days (CG105 ). After cannulation surgery, mean arterial pressure, heart rate, respiratory frequency, tidal volume and minute ventilation were acquired using a digital recording system in freely moving rats. The role of angintensin II was evaluated by systemic antagonism of AT1 receptors with losartan (20 mg kg-1 i.v.). The peripheral chemoreflex was elicited by increasing doses of KCN (20-160 μg kg min-1 , i.v.). At baseline, R-PR rats presented increased heart rate and minute ventilation (372 ± 34 beats min-1 and 1.274 ± 377 ml kg-1 min-1 ) compared with CG105 animals (332 ± 22 beats min-1 and 856 ± 112 ml kg-1 min-1 ). Mean arterial pressure was not different between the groups. Pressor and bradycardic responses evoked by KCN (60 μg kg-1 ) were increased in R-PR (+45 ± 13 mmHg and -77 ± 47 beats min-1 ) compared with CG105 rats (+25 ± 17 mmHg and -27 ± 28 beats min-1 ), but no difference was found in the tachypnoeic response. These differences were preserved after losartan. The data suggest that angiotensin II acting on AT1 receptors may not be associated with the increased heart rate, increased minute ventilation and acute cardiovascular responses to peripheral chemoreflex activation in rats that underwent postweaning protein restriction followed by recovery.
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Affiliation(s)
- Renato Willian Martins Sá
- Department of Biological Sciences, ICEB/NUPEB, Federal University of Ouro Preto - Campus Universitário Morro do Cruzeiro, 35, 400-000, Ouro Preto, MG, Brazil
| | - Andrea Siqueira Haibara
- Department of Physiology and Biophysics, ICB, Federal University of Minas Gerais, 31, 270-910, Belo Horizonte, MG, Brazil
| | - Paula Magalhães Gomes
- Department of Biological Sciences, ICEB/NUPEB, Federal University of Ouro Preto - Campus Universitário Morro do Cruzeiro, 35, 400-000, Ouro Preto, MG, Brazil
| | - Giovana Lopes Aguiar
- Department of Biological Sciences, ICEB/NUPEB, Federal University of Ouro Preto - Campus Universitário Morro do Cruzeiro, 35, 400-000, Ouro Preto, MG, Brazil
| | - Rafael Souza Leopoldino Nascimento
- Department of Biological Sciences, ICEB/NUPEB, Federal University of Ouro Preto - Campus Universitário Morro do Cruzeiro, 35, 400-000, Ouro Preto, MG, Brazil
| | - Maria Lucia Pedrosa
- Department of Biological Sciences, ICEB/NUPEB, Federal University of Ouro Preto - Campus Universitário Morro do Cruzeiro, 35, 400-000, Ouro Preto, MG, Brazil
| | - Andréia Carvalho Alzamora
- Department of Biological Sciences, ICEB/NUPEB, Federal University of Ouro Preto - Campus Universitário Morro do Cruzeiro, 35, 400-000, Ouro Preto, MG, Brazil
| | - Lisandra Brandino de Oliveira
- Department of Biological Sciences, ICEB/NUPEB, Federal University of Ouro Preto - Campus Universitário Morro do Cruzeiro, 35, 400-000, Ouro Preto, MG, Brazil
| | - Leonardo Máximo Cardoso
- Department of Biological Sciences, ICEB/NUPEB, Federal University of Ouro Preto - Campus Universitário Morro do Cruzeiro, 35, 400-000, Ouro Preto, MG, Brazil
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11
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Silva FC, de Menezes RC, Chianca DA. The implication of protein malnutrition on cardiovascular control systems in rats. Front Physiol 2015; 6:246. [PMID: 26388783 PMCID: PMC4557349 DOI: 10.3389/fphys.2015.00246] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Accepted: 08/17/2015] [Indexed: 01/01/2023] Open
Abstract
The malnutrition in early life is associated with metabolic changes and cardiovascular impairment in adulthood. Deficient protein intake-mediated hypertension has been observed in clinical and experimental studies. In rats, protein malnutrition also increases the blood pressure and enhances heart rate and sympathetic activity. In this review, we discuss the effects of post-weaning protein malnutrition on the resting mean arterial pressure and heart rate and their variabilities, cardiovascular reflexes sensitivity, cardiac autonomic balance, sympathetic and renin-angiotensin activities and neural plasticity during adult life. These insights reveal an interesting prospect on the autonomic modulation underlying the cardiovascular imbalance and provide relevant information on preventing cardiovascular diseases.
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Affiliation(s)
- Fernanda C Silva
- Laboratory of Cardiovascular Physiology, Department of Biological Sciences, Institute of Biological Sciences, Federal University of Ouro Preto Ouro Preto, Brazil ; Graduate Program in Biological Sciences - CBIOL/NUPEB, Federal University of Ouro Preto Ouro Preto, Brazil
| | - Rodrigo C de Menezes
- Laboratory of Cardiovascular Physiology, Department of Biological Sciences, Institute of Biological Sciences, Federal University of Ouro Preto Ouro Preto, Brazil ; Graduate Program in Biological Sciences - CBIOL/NUPEB, Federal University of Ouro Preto Ouro Preto, Brazil
| | - Deoclécio A Chianca
- Laboratory of Cardiovascular Physiology, Department of Biological Sciences, Institute of Biological Sciences, Federal University of Ouro Preto Ouro Preto, Brazil ; Graduate Program in Biological Sciences - CBIOL/NUPEB, Federal University of Ouro Preto Ouro Preto, Brazil
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12
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de Souza AA, de Menezes RC, Abreu AR, Araujo GR, Costa DC, Chianca DA. Increased α1-adrenoreceptor activity is required to sustain blood pressure in female rats under food restriction. Life Sci 2015; 128:55-63. [DOI: 10.1016/j.lfs.2015.02.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Revised: 12/18/2014] [Accepted: 02/11/2015] [Indexed: 11/15/2022]
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de Brito Alves JL, Nogueira VO, Cavalcanti Neto MP, Leopoldino AM, Curti C, Colombari DSA, Colombari E, Wanderley AG, Leandro CG, Zoccal DB, Costa-Silva JH. Maternal protein restriction increases respiratory and sympathetic activities and sensitizes peripheral chemoreflex in male rat offspring. J Nutr 2015; 145:907-14. [PMID: 25934662 PMCID: PMC6619683 DOI: 10.3945/jn.114.202804] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Accepted: 01/21/2015] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Maternal protein restriction in rats increases the risk of adult offspring arterial hypertension through unknown mechanisms. OBJECTIVES The aims of the study were to evaluate the effects of a low-protein (LP) diet during pregnancy and lactation on baseline sympathetic and respiratory activities and peripheral chemoreflex sensitivity in the rat offspring. METHODS Wistar rat dams were fed a control [normal-protein (NP); 17% protein] or an LP (8% protein) diet during pregnancy and lactation, and their male offspring were studied at 30 d of age. Direct measurements of baseline arterial blood pressure (ABP), heart rate (HR), and respiratory frequency (Rf) as well as peripheral chemoreflex activation (potassium cyanide: 0.04%) were recorded in pups while they were awake. In addition, recordings of the phrenic nerve (PN) and thoracic sympathetic nerve (tSN) activities were obtained from the in situ preparations. Hypoxia-inducible factor 1α (HIF-1α) expression was also evaluated in carotid bifurcation through a Western blotting assay. RESULTS At 30 d of age, unanesthetized LP rats exhibited enhanced resting Rf (P = 0.001) and similar ABP and HR compared with the NP rats. Despite their similar baseline ABP values, LP rats exhibited augmented low-frequency variability (∼91%; P = 0.01). In addition, the unanesthetized LP rats showed enhanced pressor (P = 0.01) and tachypnoeic (P = 0.03) responses to peripheral chemoreflex activation. The LP rats displayed elevated baseline tSN activity (∼86%; P = 0.02) and PN burst frequency (45%; P = 0.01) and amplitude (53%; P = 0.001) as well as augmented sympathetic (P = 0.01) and phrenic (P = 0.04) excitatory responses to peripheral chemoreflex activation compared with the NP group. Furthermore, LP rats showed an increase of ∼100% in HIF-1α protein density in carotid bifurcation compared with NP rats. CONCLUSION Sympathetic-respiratory overactivity and amplified peripheral chemoreceptor responses, potentially through HIF-1α-dependent mechanisms, precede the onset of hypertension in juvenile rats exposed to protein undernutrition during gestation and lactation.
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Affiliation(s)
- José L de Brito Alves
- Department of Physical Education and Sport Sciences, Federal University of
Pernambuco, Vitoria de Santo Antão, Pernambuco, Brazil
| | - Viviane O Nogueira
- Department of Physical Education and Sport Sciences, Federal University of
Pernambuco, Vitoria de Santo Antão, Pernambuco, Brazil
| | - Marinaldo P Cavalcanti Neto
- Department of Physics and Chemistry, University of São Paulo, Ribeirão
Preto, São Paulo, Brazil,Department of Clinical Analyses, Toxicology and Food Sciences, School of
Pharmaceutical Sciences, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Andréia M Leopoldino
- Department of Physics and Chemistry, University of São Paulo, Ribeirão
Preto, São Paulo, Brazil,Department of Clinical Analyses, Toxicology and Food Sciences, School of
Pharmaceutical Sciences, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Carlos Curti
- Department of Physics and Chemistry, University of São Paulo, Ribeirão
Preto, São Paulo, Brazil,Department of Clinical Analyses, Toxicology and Food Sciences, School of
Pharmaceutical Sciences, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Débora SA Colombari
- Department of Physiology and Pathology, School of Dentistry of Araraquara,
São Paulo State University, Araraquara, São Paulo, Brazil
| | - Eduardo Colombari
- Department of Physiology and Pathology, School of Dentistry of Araraquara,
São Paulo State University, Araraquara, São Paulo, Brazil
| | - Almir G Wanderley
- Department of Physiology and Pharmacology, Federal University of Pernambuco,
Pernambuco, Brazil
| | - Carol G Leandro
- Department of Physical Education and Sport Sciences, Federal University of
Pernambuco, Vitoria de Santo Antão, Pernambuco, Brazil
| | - Daniel B Zoccal
- Department of Physiology and Pharmacology, Federal University of Pernambuco,
Pernambuco, Brazil
| | - João H Costa-Silva
- Department of Physical Education and Sport Sciences, Federal University of Pernambuco, Vitoria de Santo Antão, Pernambuco, Brazil;
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14
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Silva FCS, Guidine PA, Ribeiro MF, Fernandes LG, Xavier CH, de Menezes RC, Silva ME, Moraes-Santos T, Moraes MF, Chianca DA. Malnutrition alters the cardiovascular responses induced by central injection of tityustoxin in Fischer rats. Toxicon 2013; 76:343-9. [DOI: 10.1016/j.toxicon.2013.09.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Revised: 09/09/2013] [Accepted: 09/12/2013] [Indexed: 11/26/2022]
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