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Svorc P, Svorc P. General anesthesia and electrocardiographic parameters in in vivo experiments involving rats. Physiol Res 2022; 71:177-192. [PMID: 35275702 PMCID: PMC9150551 DOI: 10.33549/physiolres.934848] [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: 11/30/2021] [Accepted: 02/18/2022] [Indexed: 11/25/2022] Open
Abstract
In in vivo cardiovascular or toxicological studies involving rat models, changes in selected electrocardiographic (ECG) parameters are monitored after various interventions to assess the origin and development of heart rhythm disorders. Each ECG parameter has diagnostic significance; as such, commonly evaluated ECG parameters, including heart rate, PR interval, P wave duration, P wave amplitude, QRS complex, QT and QTc interval duration, R wave and T wave amplitude, of rats under various types of general anesthesia were the focus of this study. Studies that performed in vivo cardiovascular or toxicological experiments in rats were retrieved from a search of the Web of Science database for articles published mainly between 2000 and 2021. In total, the search retrieved 123 articles. ECG parameters that were reported as baseline or control values were summarized and averages with ranges were calculated. It is important to be cautious when interpreting results and, in discussions addressing the mechanisms underlying a given type of arrhythmia, acknowledge that initial ECG parameters may already be affected to some extent by the general anesthesia as well as by sex and the time of day the experiments were performed.
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Affiliation(s)
- Pavol Svorc
- Department of Physiology, Medical Faculty, Safarik University, Kosice, Slovak Republic
- Department of Physiology and Patophysiology, Medical Faculty, Ostrava University, Ostrava, Czech Republic
| | - Pavol Svorc
- Department of Physiology and Patophysiology, Medical Faculty, Ostrava University, Ostrava, Czech Republic
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Barbosa SDS, Mello APDFAC, Nogueira VDO, da Silva IF, de Melo PED, dos Santos CR, Costa‐Silva JHD, Araújo AV. Consumption of a high‐fat diet does not potentiate the deleterious effects on lipid and protein levels and body development in rats subjected to maternal protein restriction. Clin Exp Pharmacol Physiol 2019; 47:412-421. [DOI: 10.1111/1440-1681.13210] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 10/10/2019] [Accepted: 10/31/2019] [Indexed: 11/28/2022]
Affiliation(s)
- Sávio dos Santos Barbosa
- Nucleus of Physical Education and Sport Sciences Universidade Federal de Pernambuco (CAV/UFPE) Vitória de Santo Antão Brazil
| | | | - Viviane de Oliveira Nogueira
- Nucleus of Physical Education and Sport Sciences Universidade Federal de Pernambuco (CAV/UFPE) Vitória de Santo Antão Brazil
| | - Ially Fabiane da Silva
- Nucleus of Physical Education and Sport Sciences Universidade Federal de Pernambuco (CAV/UFPE) Vitória de Santo Antão Brazil
| | | | - Carlos Renato dos Santos
- Nucleus of Public Health Centro Acadêmico de Vitória Universidade Federal de Pernambuco (CAV/UFPE) Vitória de Santo Antão Brazil
| | - João Henrique da Costa‐Silva
- Nucleus of Physical Education and Sport Sciences Universidade Federal de Pernambuco (CAV/UFPE) Vitória de Santo Antão Brazil
| | - Alice Valença Araújo
- Nucleus of Public Health Centro Acadêmico de Vitória Universidade Federal de Pernambuco (CAV/UFPE) Vitória de Santo Antão Brazil
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Vorn R, Yoo HY. Differential effects of saturated and unsaturated fatty acids on vascular reactivity in isolated mesenteric and femoral arteries of rats. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2019; 23:403-409. [PMID: 31496877 PMCID: PMC6717784 DOI: 10.4196/kjpp.2019.23.5.403] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 08/03/2019] [Accepted: 08/04/2019] [Indexed: 01/08/2023]
Abstract
Free fatty acid (FFA) intake regulates blood pressure and vascular reactivity but its direct effect on contractility of systemic arteries is not well understood. We investigated the effects of saturated fatty acid (SFA, palmitic acid), polyunsaturated fatty acid (PUFA, linoleic acid), and monounsaturated fatty acid (MUFA, oleic acid) on the contractility of isolated mesenteric (MA) and deep femoral arteries (DFA) of Sprague-Dawley rats. Isolated MA and DFA were mounted on a dual wire myograph and phenylephrine (PhE, 1-10 µM) concentration-dependent contraction was obtained with or without FFAs. Incubation with 100 µM of palmitic acid significantly increased PhE-induced contraction in both arteries. In MA, treatment with 100 µM of linoleic acid decreased 1 µM PhE-induced contraction while increasing the response to higher PhE concentrations. In DFA, linoleic acid slightly decreased PhE-induced contraction while 200 µM oleic acid significantly decreased it. In MA, oleic acid reduced contraction at low PhE concentration (1 and 2 µM) while increasing it at 10 µM PhE. Perplexingly, depolarization by 40 mM KCl-induced contraction of MA was commonly enhanced by the three fatty acids. The 40 mM KCl-contraction of DFA was also augmented by linoleic and oleic acids while not affected by palmitic acid. SFA persistently increased alpha-adrenergic contraction of systemic arteries whereas PUFA and MUFA attenuated PhE-induced contraction of skeletal arteries. PUFA and MUFA concentration-dependent dual effects on MA suggest differential mechanisms depending on the types of arteries. Further studies are needed to elucidate underlying mechanisms of the various effects of FFA on systemic arteries.
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Affiliation(s)
- Rany Vorn
- Graduate School, Chung-Ang University, Seoul 06974, Korea
| | - Hae Young Yoo
- Department of Nursing, Chung-Ang University, Seoul 06974, Korea
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Leão VF, Ferreira LLDM, Melo CM, Bonfleur ML, da Silva LL, Carneiro EM, Raimundo JM, Ribeiro RA. Taurine supplementation prevents endothelial dysfunction and attenuates structural changes in aortas from hypothalamic obese rats. Eur J Nutr 2018; 58:551-563. [DOI: 10.1007/s00394-018-1616-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 01/14/2018] [Indexed: 02/07/2023]
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Vileigas DF, de Deus AF, da Silva DCT, de Tomasi LC, de Campos DHS, Adorni CS, de Oliveira SM, Sant'Ana PG, Okoshi K, Padovani CR, Cicogna AC. Saturated high-fat diet-induced obesity increases adenylate cyclase of myocardial β-adrenergic system and does not compromise cardiac function. Physiol Rep 2017; 4:4/17/e12914. [PMID: 27582064 PMCID: PMC5027348 DOI: 10.14814/phy2.12914] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Accepted: 08/01/2016] [Indexed: 01/13/2023] Open
Abstract
Obesity is a worldwide pandemic associated with high incidence of cardiovascular disease. The mechanisms by which the obesity leads cardiac dysfunction are not fully elucidated and few studies have evaluated the relationship between obesity and proteins involved in myocardial β‐adrenergic (βA) system. The purpose of this study was to evaluate the cardiac function and βA pathway components in myocardium of obese rats. Male Wistar rats were distributed into two groups: control (n = 17; standard diet) and obese (n = 17; saturated high‐fat diet) fed for 33 weeks. Nutritional profile and comorbidities were assessed. Cardiac structure and function was evaluated by macroscopic postmortem, echocardiographic and isolated papillary muscle analyzes. Myocardial protein expression of β1‐ and β2‐adrenergic receptors, Gαs protein, adenylate cyclase (AC) and protein kinase A (PKA) was performed by Western blot. Cardiac cyclic adenosine monophosphate (cAMP) levels and PKA activity were assessed by ELISA. Obese rats showed increased adiposity index (P < 0.001) and several comorbidities as hypertension, glucose intolerance, insulin resistance, and dyslipidemia compared with control rats. Echocardiographic assessment revealed increased left atrium diameter (C: 4.98 ± 0.38 vs. Ob: 5.47 ± 0.53, P = 0.024) and posterior wall shortening velocity (C: 37.1 ± 3.6 vs. Ob: 41.8 ± 3.8, P = 0.007) in obese group. Papillary muscle evaluation indicated that baseline data and myocardial responsiveness to isoproterenol stimulation were similar between the groups. Protein expression of myocardial AC was higher in obese group than in the control (C: 1.00 ± 0.21 vs. Ob: 1.25 ± 0.10, P = 0.025), whereas the other components were unchanged. These results suggest that saturated high‐fat diet‐induced obesity was not effective in triggering cardiac dysfunction and impair the beta‐adrenergic signaling.
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Affiliation(s)
- Danielle F Vileigas
- Department of Internal Medicine, Medical School São Paulo State University "Júlio de Mesquita Filho", Botucatu, São Paulo, Brazil
| | - Adriana F de Deus
- Department of Internal Medicine, Medical School São Paulo State University "Júlio de Mesquita Filho", Botucatu, São Paulo, Brazil
| | - Danielle C T da Silva
- Department of Internal Medicine, Medical School São Paulo State University "Júlio de Mesquita Filho", Botucatu, São Paulo, Brazil
| | - Loreta C de Tomasi
- Department of Internal Medicine, Medical School São Paulo State University "Júlio de Mesquita Filho", Botucatu, São Paulo, Brazil
| | - Dijon H S de Campos
- Department of Internal Medicine, Medical School São Paulo State University "Júlio de Mesquita Filho", Botucatu, São Paulo, Brazil
| | - Caroline S Adorni
- Department of Internal Medicine, Medical School São Paulo State University "Júlio de Mesquita Filho", Botucatu, São Paulo, Brazil
| | - Scarlet M de Oliveira
- Department of Internal Medicine, Medical School São Paulo State University "Júlio de Mesquita Filho", Botucatu, São Paulo, Brazil
| | - Paula G Sant'Ana
- Department of Internal Medicine, Medical School São Paulo State University "Júlio de Mesquita Filho", Botucatu, São Paulo, Brazil
| | - Katashi Okoshi
- Department of Internal Medicine, Medical School São Paulo State University "Júlio de Mesquita Filho", Botucatu, São Paulo, Brazil
| | - Carlos R Padovani
- Department of Biostatistics, Biosciences Institute São Paulo State University "Júlio de Mesquita Filho", Botucatu, São Paulo, Brazil
| | - Antonio C Cicogna
- Department of Internal Medicine, Medical School São Paulo State University "Júlio de Mesquita Filho", Botucatu, São Paulo, Brazil
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Kanthe PS, Patil BS, Bagali SC, Reddy RC, Aithala MR, Das KK. Protective effects of Ethanolic Extract of Emblica officinalis (amla) on Cardiovascular Pathophysiology of Rats, Fed with High Fat Diet. J Clin Diagn Res 2017; 11:CC05-CC09. [PMID: 29207698 DOI: 10.7860/jcdr/2017/28474.10628] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2017] [Accepted: 07/05/2017] [Indexed: 12/14/2022]
Abstract
Introduction Dietary high fat alters lipid profile and possibly induce sympatho-vagal imbalance. Emblica officinalis is found to be potential antioxidant and possibly counteract hyperlipidemia induced lipid peroxidation. Aim To assess Ethanolic extract of Emblica Officinalis (EEO) as lipid lowering and cardiovascular protective agent against high dietary fat supplemented to experimental rats. Further to study a comparative analysis between EEO and atorvastatin on hyperlipidemia and cardiovascular integrity. Materials and Methods EEO was prepared and phytochemical analysis was done. Rats were divided into five groups, having six rats in each group as following; Group I-control (20% fat); Group II (+ EEO 100 mg/kg body wt); Group III (fed with high fat diet; 30% fat); Group IV (fed with high fat diet; 30% fat + EEO 100 mg/kg body wt) and Group V (fed with high fat diet; 30% fat + atorvastatin 4 mg/kg body wt). The treatments were continued for 21 days. Gravimetric parameters and electrophysiological parameters {Heart Rate (HR), sympatho-vagal balance} were recorded and lipid profiles of all the groups were measured. ANOVA, correlation and multiple regressions were done for analysis of data. Results Significant alteration in serum lipid profile was observed in rats fed with high dietary fat but supplementation of EEO was found to be reversible. Electrophysiological evaluation revealed altered HR and sympatho-vagal balance in high dietary fat fed rats (Group III) which indicate cardiac autonomic malfunctions which were found to be improved in Emblica officinalis supplemented group of rats (Group IV). Further, analysis has shown significant negative correlation between HDL/LDL and sympatho-vagal balance in all groups of rats which clearly indicate a role of dietary fat on sympatho-vagal balance. These results further corroborated with findings of histopathological study on myocardium and elastic artery. Conclusion Observations from the study indicate a beneficial role of ethanolic extract of Emblica officinalis (amla) on dyslipidemia and cardiac autonomic functions in rats treated with high fat diet.
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Affiliation(s)
- Pallavi Shantkumar Kanthe
- PhD Scholar, Department of Laboratory of Vascular Physiology and Medicine, Department of Physiology, BLDE University Shri B. M. Patil Medical College, Hospital and Research Centre, Vijayapura, Karnataka, India
| | - Bheemshetty S Patil
- Lecturer, Department of Anatomy, BLDE University Shri B. M. Patil Medical College, Hospital and Research Centre, Vijayapura, Karnataka, India
| | - Shrilaxmi C Bagali
- Assistant Professor, Department of Laboratory of Vascular Physiology and Medicine, Department of Physiology, BLDE University Shri B. M. Patil Medical College, Hospital and Research Centre, Vijayapura, Karnataka, India
| | - R Chandramouli Reddy
- Junior Research Scientist, Department of Laboratory of Vascular Physiology and Medicine, Department of Physiology, BLDE University Shri B. M. Patil Medical College, Hospital and Research Centre, Vijayapura, Karnataka, India
| | - Manjunatha R Aithala
- Professor and Head, Department of Physiology, BLDE University Shri B. M. Patil Medical College, Hospital and Research Centre, Vijayapura, Karnataka, India
| | - Kusal K Das
- Professor, Department of Laboratory of Vascular Physiology and Medicine, Department of Physiology, BLDE University Shri B. M. Patil Medical College, Hospital and Research Centre, Vijayapura, Karnataka, India
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The anti-osteoporotic and anti-atherogenic effects of alendronate and simvastatin in ovariectomized rats fed high fat diet: A comparative study of combination therapy versus monotherapy. Biomed Pharmacother 2017; 89:1115-1124. [DOI: 10.1016/j.biopha.2017.02.105] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2016] [Revised: 02/27/2017] [Accepted: 02/27/2017] [Indexed: 12/31/2022] Open
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Overview of Antagonists Used for Determining the Mechanisms of Action Employed by Potential Vasodilators with Their Suggested Signaling Pathways. Molecules 2016; 21:495. [PMID: 27092479 PMCID: PMC6274436 DOI: 10.3390/molecules21040495] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Revised: 03/23/2016] [Accepted: 03/28/2016] [Indexed: 01/04/2023] Open
Abstract
This paper is a review on the types of antagonists and the signaling mechanism pathways that have been used to determine the mechanisms of action employed for vasodilation by test compounds. Thus, we exhaustively reviewed and analyzed reports related to this topic published in PubMed between the years of 2010 till 2015. The aim of this paperis to suggest the most appropriate type of antagonists that correspond to receptors that would be involved during the mechanistic studies, as well as the latest signaling pathways trends that are being studied in order to determine the route(s) that atest compound employs for inducing vasodilation. The methods to perform the mechanism studies were included. Fundamentally, the affinity, specificity and selectivity of the antagonists to their receptors or enzymes were clearly elaborated as well as the solubility and reversibility. All the signaling pathways on the mechanisms of action involved in the vascular tone regulation have been well described in previous review articles. However, the most appropriate antagonists that should be utilized have never been suggested and elaborated before, hence the reason for this review.
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Perdomo L, Beneit N, Otero YF, Escribano Ó, Díaz-Castroverde S, Gómez-Hernández A, Benito M. Protective role of oleic acid against cardiovascular insulin resistance and in the early and late cellular atherosclerotic process. Cardiovasc Diabetol 2015; 14:75. [PMID: 26055507 PMCID: PMC4475625 DOI: 10.1186/s12933-015-0237-9] [Citation(s) in RCA: 97] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Accepted: 05/29/2015] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Several translational studies have identified the differential role between saturated and unsaturated fatty acids at cardiovascular level. However, the molecular mechanisms that support the protective role of oleate in cardiovascular cells are poorly known. For these reasons, we studied the protective role of oleate in the insulin resistance and in the atherosclerotic process at cellular level such as in cardiomyocytes (CMs), vascular smooth muscle cells (VSMCs) and endothelial cells (ECs). METHODS The effect of oleate in the cardiovascular insulin resistance, vascular dysfunction, inflammation, proliferation and apoptosis of VSMCs were analyzed by Western blot, qRT-PCR, BrdU incorporation and cell cycle analysis. RESULTS Palmitate induced insulin resistance. However, oleate not only did not induce cardiovascular insulin resistance but also had a protective effect against insulin resistance induced by palmitate or TNFα. One mechanism involved might be the prevention by oleate of JNK-1/2 or NF-κB activation in response to TNF-α or palmitate. Oleate reduced MCP-1 and ICAM-1 and increased eNOS expression induced by proinflammatory cytokines in ECs. Furthermore, oleate impaired the proliferation induced by TNF-α, angiotensin II or palmitate and the apoptosis induced by TNF-α or thapsigargin in VSMCs. CONCLUSIONS Our data suggest a differential role between oleate and palmitate and support the concept of the cardioprotector role of oleate as the main lipid component of virgin olive oil. Thus, oleate protects against cardiovascular insulin resistance, improves endothelial dysfunction in response to proinflammatory signals and finally, reduces proliferation and apoptosis in VSMCs that may contribute to an ameliorated atherosclerotic process and plaque stability.
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MESH Headings
- Angiotensin II/pharmacology
- Animals
- Apoptosis/drug effects
- Atherosclerosis/metabolism
- Blotting, Western
- Cell Line
- Cell Proliferation/drug effects
- Chemokine CCL2/drug effects
- Chemokine CCL2/genetics
- Chemokine CCL2/metabolism
- Inflammation
- Insulin Resistance
- Intercellular Adhesion Molecule-1/drug effects
- Intercellular Adhesion Molecule-1/genetics
- Intercellular Adhesion Molecule-1/metabolism
- MAP Kinase Signaling System/drug effects
- Mice
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/drug effects
- Myocytes, Cardiac/drug effects
- Myocytes, Cardiac/metabolism
- Myocytes, Smooth Muscle/drug effects
- NF-kappa B/drug effects
- NF-kappa B/metabolism
- Nitric Oxide Synthase Type III/drug effects
- Nitric Oxide Synthase Type III/genetics
- Nitric Oxide Synthase Type III/metabolism
- Oleic Acid/pharmacology
- Palmitates/pharmacology
- Palmitic Acid/pharmacology
- RNA, Messenger/drug effects
- RNA, Messenger/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Tumor Necrosis Factor-alpha/pharmacology
- Vasoconstrictor Agents/pharmacology
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Affiliation(s)
- Liliana Perdomo
- Biochemistry and Molecular Biology Department, School of Pharmacy, Complutense University of Madrid, Madrid, Spain
- Health Research Institute of San Carlos Clinic Hospital (IdISSC), Madrid, Spain
- CIBER of Diabetes and Associated Metabolic Diseases, Madrid, Spain
| | - Nuria Beneit
- Biochemistry and Molecular Biology Department, School of Pharmacy, Complutense University of Madrid, Madrid, Spain
- Health Research Institute of San Carlos Clinic Hospital (IdISSC), Madrid, Spain
- CIBER of Diabetes and Associated Metabolic Diseases, Madrid, Spain
| | - Yolanda F Otero
- Biochemistry and Molecular Biology Department, School of Pharmacy, Complutense University of Madrid, Madrid, Spain
- Health Research Institute of San Carlos Clinic Hospital (IdISSC), Madrid, Spain
- CIBER of Diabetes and Associated Metabolic Diseases, Madrid, Spain
| | - Óscar Escribano
- Biochemistry and Molecular Biology Department, School of Pharmacy, Complutense University of Madrid, Madrid, Spain
- Health Research Institute of San Carlos Clinic Hospital (IdISSC), Madrid, Spain
- CIBER of Diabetes and Associated Metabolic Diseases, Madrid, Spain
| | - Sabela Díaz-Castroverde
- Biochemistry and Molecular Biology Department, School of Pharmacy, Complutense University of Madrid, Madrid, Spain
- Health Research Institute of San Carlos Clinic Hospital (IdISSC), Madrid, Spain
- CIBER of Diabetes and Associated Metabolic Diseases, Madrid, Spain
| | - Almudena Gómez-Hernández
- Biochemistry and Molecular Biology Department, School of Pharmacy, Complutense University of Madrid, Madrid, Spain.
- Health Research Institute of San Carlos Clinic Hospital (IdISSC), Madrid, Spain.
- CIBER of Diabetes and Associated Metabolic Diseases, Madrid, Spain.
| | - Manuel Benito
- Biochemistry and Molecular Biology Department, School of Pharmacy, Complutense University of Madrid, Madrid, Spain
- Health Research Institute of San Carlos Clinic Hospital (IdISSC), Madrid, Spain
- CIBER of Diabetes and Associated Metabolic Diseases, Madrid, Spain
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Oliveira Junior SA, Padovani CR, Rodrigues SA, Silva NR, Martinez PF, Campos DH, Okoshi MP, Okoshi K, Dal-Pai M, Cicogna AC. Extensive impact of saturated fatty acids on metabolic and cardiovascular profile in rats with diet-induced obesity: a canonical analysis. Cardiovasc Diabetol 2013; 12:65. [PMID: 23587409 PMCID: PMC3679825 DOI: 10.1186/1475-2840-12-65] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Accepted: 04/06/2013] [Indexed: 12/25/2022] Open
Abstract
Background Although hypercaloric interventions are associated with nutritional, endocrine, metabolic, and cardiovascular disorders in obesity experiments, a rational distinction between the effects of excess adiposity and the individual roles of dietary macronutrients in relation to these disturbances has not previously been studied. This investigation analyzed the correlation between ingested macronutrients (including sucrose and saturated and unsaturated fatty acids) plus body adiposity and metabolic, hormonal, and cardiovascular effects in rats with diet-induced obesity. Methods Normotensive Wistar-Kyoto rats were submitted to Control (CD; 3.2 Kcal/g) and Hypercaloric (HD; 4.6 Kcal/g) diets for 20 weeks followed by nutritional evaluation involving body weight and adiposity measurement. Metabolic and hormonal parameters included glycemia, insulin, insulin resistance, and leptin. Cardiovascular analysis included systolic blood pressure profile, echocardiography, morphometric study of myocardial morphology, and myosin heavy chain (MHC) protein expression. Canonical correlation analysis was used to evaluate the relationships between dietary macronutrients plus adiposity and metabolic, hormonal, and cardiovascular parameters. Results Although final group body weights did not differ, HD presented higher adiposity than CD. Diet induced hyperglycemia while insulin and leptin levels remained unchanged. In a cardiovascular context, systolic blood pressure increased with time only in HD. Additionally, in vivo echocardiography revealed cardiac hypertrophy and improved systolic performance in HD compared to CD; and while cardiomyocyte size was unchanged by diet, nuclear volume and collagen interstitial fraction both increased in HD. Also HD exhibited higher relative β-MHC content and β/α-MHC ratio than their Control counterparts. Importantly, body adiposity was weakly associated with cardiovascular effects, as saturated fatty acid intake was directly associated with most cardiac remodeling measurements while unsaturated lipid consumption was inversely correlated with these effects. Conclusion Hypercaloric diet was associated with glycemic metabolism and systolic blood pressure disorders and cardiac remodeling. These effects directly and inversely correlated with saturated and unsaturated lipid consumption, respectively.
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