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Bertoldi J, Kindlovits R, Rocha H, Fernandes-Santos C, Gomes J, Oliveira E, Muniz I, Santos M, Pereira J, Rocha N, da Nóbrega A, Medeiros R. Aerobic exercise prevents cardiomyocyte damage caused by oxidative stress in early cardiovascular disease by increasing vascularity while L-arginine supplementation prevents it by increasing activation of the enzyme nitric oxide synthase. Braz J Med Biol Res 2023; 56:e12533. [PMID: 37585913 PMCID: PMC10427156 DOI: 10.1590/1414-431x2023e12533] [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: 04/12/2023] [Accepted: 06/24/2023] [Indexed: 08/18/2023] Open
Abstract
L-Arginine and chronic exercise reduce oxidative stress. However, it is unclear how they affect cardiomyocytes during cardiovascular disease (CVD) development. The aim of this research was to investigate the possible effects of L-arginine supplementation and aerobic training on systemic oxidative stress and their consequences on cardiomyocytes during cardiometabolic disease onset caused by excess fructose. Wistar rats were allocated into four groups: control (C), fructose (F, 10% fructose in water), fructose training (FT; moderate running, 50-70% of the maximal velocity), and fructose arginine (FA; 880 mg/kg/day). Fructose was given for two weeks and fructose plus treatments for the subsequent eight weeks. Body composition, blood glucose, insulin, lipid profile, lipid peroxidation, nitrite, metalloproteinase-2 (MMP-2) activity, left ventricle histological changes, microRNA-126, -195, and -146, eNOS, p-eNOS, and TNF-α expressions were analyzed. Higher abdominal fat mass, triacylglycerol level, and insulin level were observed in the F group, and both treatments reversed these alterations. Myocardial vascularization was impaired in fructose-fed groups, except in FT. Cardiomyocyte hypertrophy was observed in all fructose-fed groups. TNF-α levels were higher in fructose-fed groups than in the C group, and p-eNOS levels were higher in the FA than in the C and F groups. Lipid peroxidation was higher in the F group than in the FT and C groups. During CVD onset, moderate aerobic exercise reduced lipid peroxidation, and both training and L-arginine prevented metabolic changes caused by excessive fructose. Myocardial vascularization was impaired by fructose, and cardiomyocyte hypertrophy appeared to be influenced by pro-inflammatory and oxidative environments.
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Affiliation(s)
- J.M.C.R.J. Bertoldi
- Departamento de Fisiologia e Farmacologia, Universidade Federal Fluminense, Niterói, Rio de Janeiro, RJ, Brasil
- Instituto Nacional de Ciência e Tecnologia - (In)atividade física e exercício, Rio de Janeiro, RJ, Brasil
| | - R. Kindlovits
- Departamento de Fisiologia e Farmacologia, Universidade Federal Fluminense, Niterói, Rio de Janeiro, RJ, Brasil
- Instituto Nacional de Ciência e Tecnologia - (In)atividade física e exercício, Rio de Janeiro, RJ, Brasil
| | - H.N.M. Rocha
- Departamento de Fisiologia e Farmacologia, Universidade Federal Fluminense, Niterói, Rio de Janeiro, RJ, Brasil
- Instituto Nacional de Ciência e Tecnologia - (In)atividade física e exercício, Rio de Janeiro, RJ, Brasil
| | - C. Fernandes-Santos
- Departamento de Ciências Básicas, Universidade Federal Fluminense, Nova Friburgo, Rio de Janeiro, RJ, Brasil
| | - J.L.P. Gomes
- Instituto Nacional de Ciência e Tecnologia - (In)atividade física e exercício, Rio de Janeiro, RJ, Brasil
- Departamento de Biodinâmica do Movimento do Corpo Humano, Universidade de São Paulo, São Paulo, SP, Brasil
| | - E.M. Oliveira
- Instituto Nacional de Ciência e Tecnologia - (In)atividade física e exercício, Rio de Janeiro, RJ, Brasil
- Departamento de Biodinâmica do Movimento do Corpo Humano, Universidade de São Paulo, São Paulo, SP, Brasil
| | - I.C. Muniz
- Departamento de Fisiologia e Farmacologia, Universidade Federal Fluminense, Niterói, Rio de Janeiro, RJ, Brasil
- Instituto Nacional de Ciência e Tecnologia - (In)atividade física e exercício, Rio de Janeiro, RJ, Brasil
| | - M.M. Santos
- Departamento de Fisiologia e Farmacologia, Universidade Federal Fluminense, Niterói, Rio de Janeiro, RJ, Brasil
- Instituto Nacional de Ciência e Tecnologia - (In)atividade física e exercício, Rio de Janeiro, RJ, Brasil
| | - J.F. Pereira
- Departamento de Fisiologia e Farmacologia, Universidade Federal Fluminense, Niterói, Rio de Janeiro, RJ, Brasil
- Instituto Nacional de Ciência e Tecnologia - (In)atividade física e exercício, Rio de Janeiro, RJ, Brasil
| | - N.G. Rocha
- Departamento de Fisiologia e Farmacologia, Universidade Federal Fluminense, Niterói, Rio de Janeiro, RJ, Brasil
- Instituto Nacional de Ciência e Tecnologia - (In)atividade física e exercício, Rio de Janeiro, RJ, Brasil
| | - A.C.L. da Nóbrega
- Departamento de Fisiologia e Farmacologia, Universidade Federal Fluminense, Niterói, Rio de Janeiro, RJ, Brasil
- Instituto Nacional de Ciência e Tecnologia - (In)atividade física e exercício, Rio de Janeiro, RJ, Brasil
| | - R.F. Medeiros
- Instituto Nacional de Ciência e Tecnologia - (In)atividade física e exercício, Rio de Janeiro, RJ, Brasil
- Departamento de Nutrição e Dietética, Universidade Federal Fluminense, Niterói, Rio de Janeiro, RJ, Brasil
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Effects of regular physical exercise on skin blood flow and cardiovascular risk factors in overweight and obese subjects. SCIENTIA MEDICA 2022. [DOI: 10.15448/1980-6108.2022.1.41980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Objective: it is well known that low omentin levels and reduced bioavailability of nitric oxide (NO) are outgrowth of obesity. Besides, in obese subjects, microvascular dysfunction can be an initial stage of cardiovascular diseases. This situation can be evaluated with skin laser–Doppler flowmetry (LDF).Methods: in this study we investigated the effects of 12 weeks moderate physical exercise on microvascular reactivity and plasma levels of omentin and NO in 25 overweight and obese subjects. Control group was composed of 28 sedentary participants who were neither obese nor overweight. Microvascular reactivity was handled by measurement of skin blood flow from the ring finger of the right hand with LDF, which is a non–invasive method for evaluation. With this method, it was aimed to examine the post–occlusive reactive hyperemia response of the patients. None of the participants in both groups have never followed a regular exercise schedule in their life span.Results: with regular exercise, there was a statistically significant decrease in glucose (p=0.008), cholesterol (p=0.05), and triglyceride (p=0.048) levels, while body mass index, high–density lipoprotein, and low–density lipoprotein levels did not change significantly in overweight/obese group. Also, the omentin level significantly increased (p=0.01), but NO level did not change significantly. Moreover, the amount of change in omentin and NO levels measured before and after the physical exercise were significantly correlated (r=0.57). Considering the microcirculation, rest flow (p=0.001) and peak flow value of LDF (p=0.001) increased after the physical exercise.Conclusion: our study shows that moderate physical exercise affects microvascular reactivity and plasma levels of omentin in overweight and obese subjects.
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Tyshchenko V, Malikov N, Bogdanovska N, Sokolova O, Hlukhov I, Hlukhova A, Drobot K, Tyshchenko D. PECULIARITIES OF VASOR-REGULATING FUNCTIONS OF THE VASCULAR ENDOTHELIUM IN ADAPTATION OF THE YOUTH BODY TO SYSTEMATIC PHYSICAL LOADS. WIADOMOSCI LEKARSKIE (WARSAW, POLAND : 1960) 2022; 75:2103-2107. [PMID: 36256936 DOI: 10.36740/wlek202209110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
OBJECTIVE The aim: To analyze the features of changes in the functional state of the vascular endothelium of handball players in the dynamics of the training process, at different levels of the body's hypoxic state. PATIENTS AND METHODS Materials and methods: Theoretical methods, the method of Corretti et al. with the use of high-resolution ultrasound, Fisher test with the calculation of the Fisher criterion and the Bland-Altman method. The study of the vasomotor function of the vascular endothelium was carried out of young men 18-20 y.o., who did not go in for sports and which were systematically played handball. The brachial artery diameter, maximum linear blood flow velocity, volumetric blood flow velocity were registered in the state of relative rest after artificially created reactive hyperemia. RESULTS Results: The primary results obtained showed that in the process of long-term adaptation to systematic muscular work, a pronounced vasodilation effect was observed. Subsequent analyze of changes in the functional state of the vascular endothelium of young sportsmen during the macrocycle preparation different levels of the body's hypoxic state manifested the following. The young men-athletes had more pronounced vasodilation effect, the values of the linear and volumetric blood flow velocity both in the state of relative rest and at the peak of the artificially created hyperemia were significantly higher than in the young men, who did not go in for sports. CONCLUSION Conclusions: Suggested that the systematic muscular work contributes to a significant intensification of the oxidation pathway of nitric oxide formation from L-arginine with the participation of endothelial NO-synthase.
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Affiliation(s)
| | | | | | - Olga Sokolova
- ZAPORIZHZHIA NATIONAL UNIVERSITY, ZAPORIZHZHIA, UKRAINE
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Nyborg C, Bonnevie-Svendsen M, Melsom HS, Melau J, Seljeflot I, Hisdal J. Reduced L-Arginine and L-Arginine-ADMA-Ratio, and Increased SDMA after Norseman Xtreme Triathlon. Sports (Basel) 2021; 9:sports9090120. [PMID: 34564325 PMCID: PMC8472968 DOI: 10.3390/sports9090120] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 07/28/2021] [Accepted: 08/26/2021] [Indexed: 12/13/2022] Open
Abstract
Endothelial vasodilatory function is dependent on the NO synthesis from L-arginine by endothelial NO-synthetase (eNOS). eNOS can be inhibited by asymmetric dimethylarginine (ADMA) by competitive inhibition on the binding site, and symmetric dimethylarginine (SDMA) can reduce the L-arginine availability intracellularly through competing for transport over the cellular membrane. To study the NO synthesis after prolonged exercise, we assessed circulatory L-arginine, the L-arginine/ADMA ratio, and SDMA before, after, and on the day after the Norseman Xtreme triathlon, an Ironman distance triathlon. We found significantly reduced levels of L-arginine and the L-arginine/ADMA ratio and increased levels of SDMA after the race (all p < 0.05). L-arginine rose toward baseline levels the day after the race, but ADMA increased beyond baseline levels, and SDMA remained above baseline the day after the race. The reduced levels of L-arginine and the L-arginine/ADMA ratio, and increased SDMA, after the race indicate a state of reduced capability of NO production. Increased levels of ADMA and SDMA, and reduced L-arginine/ADMA ratio, as seen the day after the race, are known risk markers of atherosclerosis and warrant further studies.
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Affiliation(s)
- Christoffer Nyborg
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, 0318 Oslo, Norway; (M.B.-S.); (H.S.M.); (J.M.); (I.S.); (J.H.)
- Department of Vascular Surgery, Oslo University Hospital, 0424 Oslo, Norway
- Correspondence: ; Tel.: +47-971-76-129
| | - Martin Bonnevie-Svendsen
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, 0318 Oslo, Norway; (M.B.-S.); (H.S.M.); (J.M.); (I.S.); (J.H.)
- Department of Vascular Surgery, Oslo University Hospital, 0424 Oslo, Norway
| | - Helene Støle Melsom
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, 0318 Oslo, Norway; (M.B.-S.); (H.S.M.); (J.M.); (I.S.); (J.H.)
- Department of Vascular Surgery, Oslo University Hospital, 0424 Oslo, Norway
| | - Jørgen Melau
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, 0318 Oslo, Norway; (M.B.-S.); (H.S.M.); (J.M.); (I.S.); (J.H.)
- Department of Vascular Surgery, Oslo University Hospital, 0424 Oslo, Norway
- Department of Prehospital Care, Vestfold Hospital Trust, 3103 Toensberg, Norway
| | - Ingebjørg Seljeflot
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, 0318 Oslo, Norway; (M.B.-S.); (H.S.M.); (J.M.); (I.S.); (J.H.)
- Center for Clinical Heart Research, Department of Cardiology, Oslo University Hospital, 0424 Oslo, Norway
| | - Jonny Hisdal
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, 0318 Oslo, Norway; (M.B.-S.); (H.S.M.); (J.M.); (I.S.); (J.H.)
- Department of Vascular Surgery, Oslo University Hospital, 0424 Oslo, Norway
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Lumbikananda S, Sriwantana T, Rattanawonsakul K, Parakaw T, Phruksaniyom C, Rattanasuwan K, Vivithanaporn P, Thonabulsombat C, Sibmooh N, Srihirun S. Nitrite in paraffin-stimulated saliva correlates with blood nitrite. Nitric Oxide 2021; 116:1-6. [PMID: 34371196 DOI: 10.1016/j.niox.2021.08.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Revised: 07/15/2021] [Accepted: 08/04/2021] [Indexed: 10/20/2022]
Abstract
Nitrite anion (NO2-) is a circulating nitric oxide (NO) metabolite considered an endothelial function marker. Nitrite can be produced from nitrate (NO3-) secreted from plasma into saliva. The nitrate reductase of oral bacteria converts salivary nitrate to nitrite, which is swallowed and absorbed into circulation. In this study, we aimed to examine the relevance between these species' salivary and blood levels. We collected three whole saliva samples (unstimulated, paraffin-stimulated, and post-chlorhexidine mouthwash stimulated saliva) and blood from 75 healthy volunteers. We measured the nitrite and nitrate by the chemiluminescence method. The nitrite levels in stimulated saliva and post-mouthwash stimulated saliva exhibited weak correlations with blood nitrite. There was no correlation between nitrite in unstimulated saliva with blood nitrite. The baseline platelet activity, determined as P-selectin expression, negatively correlated with nitrite in plasma and post-mouthwash stimulated saliva. The salivary nitrate in all saliva samples showed correlations with its plasma levels. We conclude that nitrite in stimulated saliva correlates with blood nitrite.
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Affiliation(s)
- Supanat Lumbikananda
- Department of Anatomy, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Thanaporn Sriwantana
- Chakri Naruebodindra Medical Institute, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Samut Prakan, Thailand
| | - Krit Rattanawonsakul
- Department of Pharmacology, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
| | - Tipparat Parakaw
- Department of Pharmacology, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
| | | | - Kanyawat Rattanasuwan
- Department of Oral Medicine and Periodontology, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
| | - Pornpun Vivithanaporn
- Chakri Naruebodindra Medical Institute, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Samut Prakan, Thailand
| | | | - Nathawut Sibmooh
- Chakri Naruebodindra Medical Institute, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Samut Prakan, Thailand
| | - Sirada Srihirun
- Department of Pharmacology, Faculty of Dentistry, Mahidol University, Bangkok, Thailand.
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Jaconiano E, Moreira-Gonçalves D. Unveiling the role of exercise training in targeting the inflammatory paradigm of heart failure with preserved ejection fraction: a narrative review. Heart Fail Rev 2021; 27:163-190. [PMID: 34244870 DOI: 10.1007/s10741-021-10138-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/01/2021] [Indexed: 12/30/2022]
Abstract
Heart failure with preserved ejection fraction (HFpEF) is currently lacking an effective pharmacological treatment with impact on major outcomes such as hospitalization and mortality. Exercise training (EXT) is recognized as an important nonpharmacological tool, capable of improving exercise capacity and quality of life, and has even been associated with a reduction in hospitalization and cardiovascular mortality risk. However, this positive impact largely lacks a physiological explanation. The aim of this narrative review was to provide an overview of the available data supporting the hypothesis that the beneficial role of EXT in HFpEF might be due to its effects on targeting the inflammatory paradigm described for this disease. A comprehensive literature search was conducted using the PubMed-NCBI database. We reviewed the effects of EXT throughout each step of the pathophysiological pathway leading to HFpEF and found clinical and/or preclinical evidence supporting the reduction of systemic inflammation, endothelial dysfunction, microvascular rarefaction, and myocardial stiffness. We also highlighted some gaps in the knowledge or topics that deserve further clarification in future studies. In conclusion, despite the scarcity of clinical studies in this population, there is compelling evidence suggesting that EXT modulates crucial aspects of the inflammatory pathway described for HFpEF and future investigation on cellular and molecular mechanisms are encouraged.
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Affiliation(s)
- Eliane Jaconiano
- Cardiovascular R&D Center (UnIC) and Department of Physiology and Cardiothoracic Surgery, Faculty of Medicine, University of Porto, Porto, Portugal.
| | - Daniel Moreira-Gonçalves
- Centre of Physical Activity, Health and Leisure (CIAFEL), Faculty of Sport, University of Porto, Porto, Portugal
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Shimomura M, Fujie S, Sanada K, Kajimoto H, Hamaoka T, Iemitsu M. Relationship between plasma asymmetric dimethylarginine and nitric oxide levels affects aerobic exercise training-induced reduction of arterial stiffness in middle-aged and older adults. Phys Act Nutr 2021; 25:16-22. [PMID: 33887824 PMCID: PMC8076586 DOI: 10.20463/pan.2021.0003] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 03/11/2021] [Indexed: 11/22/2022] Open
Abstract
Purpose Aerobic exercise training (AT) reverses aging-induced deterioration of arterial stiffness via increased arterial nitric oxide (NO) production. Asymmetric dimethylarginine (ADMA), an endogenous inhibitor of NO synthase, was decreased by AT. However, whether AT-induced changes in ADMA levels are related to changes in nitrite/nitrate (NOx) levels remains unclear. Accordingly, we aimed to clarify whether the relationship between plasma ADMA and NOx levels affected the AT-induced reduction of arterial stiffness in middle-aged and older adults. Methods Thirty-one healthy middle-aged and older male and female subjects (66.4 ± 1.3 years) were randomly divided into two groups: exercise intervention and sedentary controls. Subjects in the training group completed an 8-week AT (60%-70% peak oxygen uptake [V̇O2peak] for 45 min, 3 days/week). Results AT significantly increased V̇O2peak (P < 0.05) and decreased carotid β-stiffness (P < 0.01). Moreover, plasma ADMA levels were significantly decreased while plasma NOx levels and NOx/ADMA ratio were significantly increased by AT (P < 0.01). Additionally, no sex differences in AT-induced changes of circulating ADMA and NOx levels, NOx/ADMA ratio, and carotid β-stiffness were observed. Furthermore, the AT-induced increase in circulating ADMA levels was negatively correlated with an increase in circulating NOx levels (r = -0.414, P < 0.05), and the AT-induced increase in NOx/ADMA ratio was negatively correlated with a decrease in carotid β-stiffness (r = -0.514, P < 0.01). Conclusion These results suggest that the increase in circulating NOx with reduction of ADMA elicited by AT is associated with a decrease in arterial stiffness regardless of sex in middle-aged and older adults.
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Affiliation(s)
- Mio Shimomura
- Faculty of Sport and Health Science, Ritsumeikan University, Shiga, Japan
| | - Shumpei Fujie
- Faculty of Sport and Health Science, Ritsumeikan University, Shiga, Japan
| | - Kiyoshi Sanada
- Faculty of Sport and Health Science, Ritsumeikan University, Shiga, Japan
| | - Hiroki Kajimoto
- Faculty of Sport and Health Science, Ritsumeikan University, Shiga, Japan
| | - Takafumi Hamaoka
- Sports Medicine for Health Promotion, Tokyo Medical University, Tokyo, Japan
| | - Motoyuki Iemitsu
- Faculty of Sport and Health Science, Ritsumeikan University, Shiga, Japan
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Zembron-Lacny A, Tylutka A, Zeromska A, Kasperska A, Wolny-Rokicka E. Does High Volume of Exercise Training Increase Aseptic Vascular Inflammation in Male Athletes? Am J Mens Health 2020; 13:1557988319858838. [PMID: 31220998 PMCID: PMC6589963 DOI: 10.1177/1557988319858838] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Aseptic vascular inflammation can be caused by high levels of various inflammatory and apoptotic factors such as tumor necrosis factor (TNFα), nitric oxide (NO), 3-nitrotyrosine (3-Nitro), and free and oxidized low-density lipoproteins (oxLDL) generated during intense exercise. Endothelial dysfunction resulting from enhanced inflammation has been implicated in cardiovascular disease (CVD). The purpose of the study was to observe the effects of high volume of exercise training on inflammatory mediators and their interaction with conventional CVD risk factors. Blood samples were collected from highly-trained men (n = 16, 21.8 ± 4.0 years) as well as from nonactive men (n = 20, 21.1 ± 1.1 years). NO concentration did not differ between groups while TNFα, 3-Nitro, oxLDL, and CRP levels were significantly higher in athletes compared to nonathletes. TNFα reached even 7-fold higher level in athletes and was highly correlated with CVD risk factor such as TG, lipoproteins LDL and HDL as well as CRP. Approximately 50% of physically active men demonstrated a 20% increase in non-HDL caused by high levels of TC and LDL. These findings suggest that athletes with a high exercise volume demonstrate increased levels of circulating biomarkers of vascular inflammation and may be more likely to have CVD.
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Affiliation(s)
| | - Anna Tylutka
- 1 Department of Applied and Clinical Physiology, University of Zielona Gora, Poland
| | | | - Anna Kasperska
- 3 Department of Physiology, University School of Physical Education Poznan, Poland
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Costa IP, Politti F, Cahalin LP, de Carvalho EFT, Costa D, Corrêa JCF, Vieira RP, Oliveira-Junior MC, De Angelis K, Stirbulov R, Dal Corso S, de Carvalho PDT, Parizotto NA, Arena R, Sampaio LM. Acute Effects Using Light-Emitting Diode Therapy (LEDT) for Muscle Function during Isometric Exercise in Asthma Patients: A Pilot Study. BIOMED RESEARCH INTERNATIONAL 2019; 2019:7501870. [PMID: 30775383 PMCID: PMC6354134 DOI: 10.1155/2019/7501870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 12/18/2018] [Indexed: 11/17/2022]
Abstract
The aim of this study was to evaluate the effectiveness of acute application of LEDT in improving peripheral muscle performance during isometric exercise in patients with asthma. Eleven patients, with a mean age 38 ± 10, underwent a single LEDT and sham application in the femoral quadriceps' dominant member (cluster with 50 LED λ = 850 nm, 50 mW, 15 s; 37.5 J), 48 h apart in a randomized crossover design. Before and after LEDT and sham application, the patients were submitted an isometric endurance test (60% of the maximum isometric voluntary contraction), up to the limit of tolerance simultaneous recording of surface electromyography. There were no statistically significant differences between groups at the time of contraction (before 41±14 versus 44±16; after 46±12 versus 45±20 s) during the isometric contraction test and inflammatory markers before and after a single LEDT application. A single application of LEDT in the parameters and dose according to the equipment used in the study were not able to promote differences in the time of contraction and the fatigue response in asthmatic patients. However, the chronic effects of LEDT application for improving muscle performance in these patients are unknown and may present different responses during applications for a long time.
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Affiliation(s)
- Ivan Peres Costa
- Post-Graduate Program in Rehabilitation Sciences, Nove de Julho University (UNINOVE), São Paulo, SP, Brazil
| | - Fabiano Politti
- Post-Graduate Program in Rehabilitation Sciences, Nove de Julho University (UNINOVE), São Paulo, SP, Brazil
| | | | | | - Dirceu Costa
- Post-Graduate Program in Rehabilitation Sciences, Nove de Julho University (UNINOVE), São Paulo, SP, Brazil
| | - João Carlos Ferrari Corrêa
- Post-Graduate Program in Rehabilitation Sciences, Nove de Julho University (UNINOVE), São Paulo, SP, Brazil
| | - Rodolfo P. Vieira
- Universidade Brasil, Post-Graduation Program in Bioengineering and Biomedical Engineering, São Paulo, Brazil
- Federal University of São Paulo (UNIFESP), Post-Graduation Program in Sciences in Human Movement and Rehabilitation, Santos, Brazil
- Brazilian Institute of Teaching and Research in Pulmonary and Exercise Immunology (IBEPIPE), São José dos Campos, Brazil
| | | | - Kátia De Angelis
- Post-Graduate Program in Rehabilitation Sciences, Nove de Julho University (UNINOVE), São Paulo, SP, Brazil
| | | | - Simone Dal Corso
- Post-Graduate Program in Rehabilitation Sciences, Nove de Julho University (UNINOVE), São Paulo, SP, Brazil
| | - Paulo de Tarso de Carvalho
- Post-Graduate Program in Rehabilitation Sciences, Nove de Julho University (UNINOVE), São Paulo, SP, Brazil
| | - Nivaldo Antonio Parizotto
- Department of Physiotherapy, Laboratory of Electrothermophototherapy, Federal University of São Carlos (UFSCAR), São Paulo, Brazil
- Post-Graduation Program in Biotechnology, University of Araraquara, Brazil
| | - Ross Arena
- Department of Physical Therapy and Integrative Physiology Laboratory, College of Applied Health Sciences, University of Illinois, Chicago, USA
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Toschi-Dias E, Trombetta IC, Silva VJD, Maki-Nunes C, Cepeda FX, Alves MJNN, Carvalho GL, Drager LF, Lorenzi-Filho G, Negrão CE, Rondon MUPB. Diet associated with exercise improves baroreflex control of sympathetic nerve activity in metabolic syndrome and sleep apnea patients. Sleep Breath 2018; 23:143-151. [PMID: 29948856 DOI: 10.1007/s11325-018-1675-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 05/23/2018] [Accepted: 05/29/2018] [Indexed: 12/28/2022]
Abstract
PURPOSE We tested the hypothesis that (i) diet associated with exercise would improve arterial baroreflex (ABR) control in metabolic syndrome (MetS) patients with and without obstructive sleep apnea (OSA) and (ii) the effects of this intervention would be more pronounced in patients with OSA. METHODS Forty-six MetS patients without (noOSA) and with OSA (apnea-hypopnea index, AHI > 15 events/h) were allocated to no treatment (control, C) or hypocaloric diet (- 500 kcal/day) associated with exercise (40 min, bicycle exercise, 3 times/week) for 4 months (treatment, T), resulting in four groups: noOSA-C (n = 10), OSA-C (n = 12), noOSA-T (n = 13), and OSA-T (n = 11). Muscle sympathetic nerve activity (MSNA), beat-to-beat BP, and spontaneous arterial baroreflex function of MSNA (ABRMSNA, gain and time delay) were assessed at study entry and end. RESULTS No significant changes occurred in C groups. In contrast, treatment in both patients with and without OSA led to a significant decrease in weight (P < 0.05) and the number of MetS factors (P = 0.03). AHI declined only in the OSA-T group (31 ± 5 to 17 ± 4 events/h, P < 0.05). Systolic BP decreased in both treatment groups, and diastolic BP decreased significantly only in the noOSA-T group. Treatment decreased MSNA in both groups. Compared with baseline, ABRMSNA gain increased in both OSA-T (13 ± 1 vs. 24 ± 2 a.u./mmHg, P = 0.01) and noOSA-T (27 ± 3 vs. 37 ± 3 a.u./mmHg, P = 0.03) groups. The time delay of ABRMSNA was reduced only in the OSA-T group (4.1 ± 0.2 s vs. 2.8 ± 0.3 s, P = 0.04). CONCLUSIONS Diet associated with exercise improves baroreflex control of sympathetic nerve activity and MetS components in patients with MetS regardless of OSA.
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Affiliation(s)
- Edgar Toschi-Dias
- Heart Institute (InCor), University of São Paulo Medical School, São Paulo, SP, Brazil.
| | | | - Valdo J D Silva
- Biological Sciences Institute, Triangulo Mineiro Federal University, Uberaba, MG, Brazil
| | - Cristiane Maki-Nunes
- Heart Institute (InCor), University of São Paulo Medical School, São Paulo, SP, Brazil
| | - Felipe X Cepeda
- Heart Institute (InCor), University of São Paulo Medical School, São Paulo, SP, Brazil
| | | | - Glauce L Carvalho
- Heart Institute (InCor), University of São Paulo Medical School, São Paulo, SP, Brazil
| | - Luciano F Drager
- Heart Institute (InCor), University of São Paulo Medical School, São Paulo, SP, Brazil
| | - Geraldo Lorenzi-Filho
- Heart Institute (InCor), University of São Paulo Medical School, São Paulo, SP, Brazil
| | - Carlos E Negrão
- Heart Institute (InCor), University of São Paulo Medical School, São Paulo, SP, Brazil.,School of Physical Education and Sport, University of São Paulo, São Paulo, SP, Brazil
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11
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Arginine and aerobic training prevent endothelial and metabolic alterations in rats at high risk for the development of the metabolic syndrome. Br J Nutr 2017; 118:1-10. [DOI: 10.1017/s0007114517001702] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
AbstractEndothelial function is a key mechanism in the development of CVD. Arginine and exercise are important non-pharmacological strategies for mitigating the impact of metabolic changes in the metabolic syndrome, but the effect of their combined administration is unknown. Thus, the aim of this study was to investigate the isolated and combined effects of aerobic training and arginine supplementation on metabolic variables and vascular reactivity in rats at high risk for developing the metabolic syndrome. Wistar rats were divided into two groups: control and fructose (F – water with 10 % fructose). After 2 weeks, the F group was divided into four groups: F, fructose+arginine (FA, 880 mg/kg per d of l-arginine), fructose+training (FT) and fructose+arginine+training (FTA); treatments lasted for 8 weeks, and no difference was observed in body mass gain. Arginine did not improve the body protein content, and both the FA and FT groups show a reversal of the increase in adipose tissue. Insulin increase was prevented by training and arginine, without additive effect, and the increase in serum TAG was prevented only by training. The F group showed impaired endothelium-dependent vasodilation and hyperreactivity to phenylephrine, but arginine and training were capable of preventing these effects, even separately. Higher nitric oxide level was observed in the FA and FT groups, and no potentiating effect was detected. Thus, only training was able to prevent the increase in TAG and improve the protein mass, and training and arginine exert similar effects on fat content, insulin and endothelial function, but these effects are not additive.
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12
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Jacomini AM, Dias DDS, Brito JDO, da Silva RF, Monteiro HL, Llesuy S, De Angelis K, Amaral SL, Zago AS. Influence of Estimated Training Status on Anti and Pro-Oxidant Activity, Nitrite Concentration, and Blood Pressure in Middle-Aged and Older Women. Front Physiol 2017; 8:122. [PMID: 28326041 PMCID: PMC5339307 DOI: 10.3389/fphys.2017.00122] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Accepted: 02/15/2017] [Indexed: 01/22/2023] Open
Abstract
The purpose of this study was to compare the association between anti and pro-oxidant activity, nitrite concentration, and blood pressure (BP) in middle-aged and older women with different levels of estimated training status (TS). The sample consisted of 155 females (50-84 years) who were submitted to a physical examination to evaluate estimated TS through the "Functional Fitness Battery Test," BP measurements, and plasma blood samples to evaluate pro-oxidant and antioxidant activity and nitrite concentrations. Participants were separated by age into a middle-aged group (<65 years) and an older (≥65 years) group and then subdivided in each group according to TS. Blood biochemistry was similar between groups. On the other hand, protein oxidation was lower in participants with higher TS, independent of age. Older females with higher TS presented higher nitrite concentrations, lower lipoperoxidation, and lower values of BP compared with those with lower TS. Lower GPx activity was observed in participants with higher TS compared with middle-aged with lower TS. Thus, our results suggest that good levels of TS may be associated with lower oxidative stress and higher nitrite concentration and may contribute to maintain normal or reduced blood pressure values.
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Affiliation(s)
- André M. Jacomini
- Department of Physical Education, School of Science, São Paulo State UniversityBauru, Brazil
| | | | | | - Roberta F. da Silva
- Department of Physical Education, School of Science, São Paulo State UniversityBauru, Brazil
| | - Henrique L. Monteiro
- Department of Physical Education, School of Science, São Paulo State UniversityBauru, Brazil
| | - Susana Llesuy
- Translational Physiology Laboratory, Universidade Nove de JulhoSão Paulo, Brazil
| | - Kátia De Angelis
- Translational Physiology Laboratory, Universidade Nove de JulhoSão Paulo, Brazil
| | - Sandra L. Amaral
- Department of Physical Education, School of Science, São Paulo State UniversityBauru, Brazil
| | - Anderson S. Zago
- Department of Physical Education, School of Science, São Paulo State UniversityBauru, Brazil
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13
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Deveaux A, Fouillet H, Petzke KJ, Hermier D, André E, Bunouf P, Lantoine-Adam F, Benamouzig R, Mathé V, Huneau JF, Mariotti F. A Slow- Compared with a Fast-Release Form of Oral Arginine Increases Its Utilization for Nitric Oxide Synthesis in Overweight Adults with Cardiometabolic Risk Factors in a Randomized Controlled Study. J Nutr 2016; 146:1322-9. [PMID: 27281799 DOI: 10.3945/jn.116.231910] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Accepted: 05/05/2016] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Oral l-arginine supplements can have a beneficial effect on nitric oxide (NO)-related functions when subjects have cardiovascular disease risk factors. OBJECTIVE The study was designed to determine the utilization for NO synthesis of oral l-arginine as a function of the cardiometabolic risk and the speed of absorption by comparing immediate-release arginine (IR-Arg), as in supplements, and sustained-release arginine (SR-Arg), which mimics the slow release of dietary arginine. METHODS In a randomized, single-blind, 2-period crossover, controlled trial (1 wk of treatment, >2 wk of washout), using [(15)N-(15)N-(guanidino)]-arginine for the first morning dose, we compared the bioavailability (secondary outcome) and utilization for NO synthesis (primary outcome) of 1.5 g IR- and SR-Arg 3 times/d in 12 healthy overweight [body mass index (BMI; in kg/m(2)): 25-30] adults with the hypertriglyceridemic waist phenotype [HTW; plasma triglycerides (TGs): >150 mg/dL; waist circumference: >94 cm (men) or >80 cm (women)] and 15 healthy control adults (CON; BMI: 18.5-25; no elevated TGs and waist circumference). RESULTS Plasma oral arginine areas under the curve were lower after supplementation with SR-Arg than with IR-Arg (112 ± 52.3 and 142 ± 50.8 μmol ⋅ h/L; P < 0.01). The utilization of oral arginine for NO synthesis was 58% higher in HTW subjects than in CON subjects and higher with SR-Arg than with IR-Arg (P < 0.05 both), particularly in HTW subjects (group-by-treatment interaction, P < 0.05). In HTW subjects administered the SR form, utilization for NO synthesis was 32% higher than with the IR form and 87% higher than in CON subjects who were administered the SR form. CONCLUSION In overweight adults with the HTW phenotype, a slow- compared with a fast-release form of oral arginine markedly favors the utilization of arginine for NO synthesis. The utilization of low-dose, slow-release arginine for NO synthesis is higher in overweight adults with the HTW phenotype than in healthy controls, suggesting that the sensitivity of NO synthesis to the dietary arginine supply increases with cardiometabolic risk. The trial was registered at clinicaltrials.gov as NCT02352740.
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Affiliation(s)
- Ambre Deveaux
- UMR Physiologie de la Nutrition et du Comportement Alimentaire, AgroParisTech, INRA, Université Paris-Saclay, Paris, France
| | - Hélène Fouillet
- UMR Physiologie de la Nutrition et du Comportement Alimentaire, AgroParisTech, INRA, Université Paris-Saclay, Paris, France
| | - Klaus J Petzke
- German Institute of Human Nutrition Potsdam-Rehbrücke, Nuthetal, Germany; and
| | - Dominique Hermier
- UMR Physiologie de la Nutrition et du Comportement Alimentaire, AgroParisTech, INRA, Université Paris-Saclay, Paris, France
| | - Etienne André
- Institut de Recherche Pierre Fabre, Boulogne-Billancourt, France
| | - Pierre Bunouf
- Institut de Recherche Pierre Fabre, Boulogne-Billancourt, France
| | | | - Robert Benamouzig
- UMR Physiologie de la Nutrition et du Comportement Alimentaire, AgroParisTech, INRA, Université Paris-Saclay, Paris, France
| | - Véronique Mathé
- UMR Physiologie de la Nutrition et du Comportement Alimentaire, AgroParisTech, INRA, Université Paris-Saclay, Paris, France
| | - Jean-François Huneau
- UMR Physiologie de la Nutrition et du Comportement Alimentaire, AgroParisTech, INRA, Université Paris-Saclay, Paris, France
| | - François Mariotti
- UMR Physiologie de la Nutrition et du Comportement Alimentaire, AgroParisTech, INRA, Université Paris-Saclay, Paris, France;
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14
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Hwang MH, Lee S. Insulin resistance: vascular function and exercise. Integr Med Res 2016; 5:198-203. [PMID: 28462118 PMCID: PMC5390417 DOI: 10.1016/j.imr.2016.06.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 05/30/2016] [Accepted: 06/02/2016] [Indexed: 12/19/2022] Open
Abstract
Insulin resistance associated with metabolic syndrome and Type 2 diabetes mellitus is an epidemic metabolic disorder, which increases the risk of cardiovascular complications. Impaired vascular endothelial function is an early marker for atherosclerosis, which causes cardiovascular complications. Both experimental and clinical studies indicate that endothelial dysfunction in vasculatures occurs with insulin resistance. The associated physiological mechanisms are not fully appreciated yet, however, it seems that augmented oxidative stress, a physiological imbalance between oxidants and antioxidants, in vascular cells is a possible mechanism involved in various vascular beds with insulin resistance and hyperglycemia. Regardless of the inclusion of resistance exercise, aerobic exercise seems to be beneficial for vascular endothelial function in both large conduit and small resistance vessels in both clinical and experimental studies with insulin resistance. In clinical cases, aerobic exercise over 8 weeks with higher intensity seems more beneficial than the cases with shorter duration and lower intensity. However, more studies are needed in the future to elucidate the physiological mechanisms by which vascular endothelial function is impaired in insulin resistance and improved with aerobic exercise.
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Affiliation(s)
- Moon-Hyon Hwang
- Division of Health and Exercise Science, Incheon National University, Incheon, Korea.,Sport Science Institute, Incheon National University, Incheon, Korea
| | - Sewon Lee
- Sport Science Institute, Incheon National University, Incheon, Korea.,Division of Sport Science, Incheon National University, Incheon, Korea
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15
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16
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NO synthesis from arginine is favored by α-linolenic acid in mice fed a high-fat diet. Amino Acids 2016; 48:2157-68. [PMID: 27178023 DOI: 10.1007/s00726-016-2243-y] [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: 12/18/2015] [Accepted: 04/23/2016] [Indexed: 10/21/2022]
Abstract
Alterations in NO availability and signaling play a pivotal role at early stages of the metabolic syndrome (MetSynd). We hypothesized that dietary α-linolenic acid (ALA, 18:3 n-3) favors NO availability by modulating amino acid metabolism, with a specific impact on the arginine-NO pathway. Mice were fed a hyperlipidic diet (285 g lipid/kg, 51.1 % energy), rich in either saturated fatty acids (SFA, provided by palm oil, PALM group) or ALA (provided by linseed oil, LIN group). We measured whole-body NO synthesis and systemic arginine hydrolysis with a tracer-based method, plasma concentration of related metabolites, and hepatic mRNA level of related enzymes, and the study was completed by a transcriptomic analysis in the liver. As expected with this model, hyperlipidic diets resulted in increased adiposity and glycemia after 5 weeks. As compared to PALM mice, LIN mice had a higher plasma nitrite and nitrate concentration, a higher whole-body conversion of arginine into NO vs urea, and a similar plasma concentration of asymmetric dimethylarginine (ADMA), despite a higher expression of the liver dimethylargininase-1. In LIN mice, there was a higher expression of genes involved in PPARα signaling, but a little impact on gene expression related to amino acids and arginine metabolism. This effect cannot be directly ascribed to changes in arginase activity in the liver or ADMA metabolism, nor to direct regulation of the related target genes. In conclusion, dietary ALA favors NO synthesis, which could contribute to rescue NO availability when jeopardized by the nutritional conditions in relation with the initiation of the MetSynd.
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17
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Sá JC, Costa EC, da Silva E, Tamburús NY, Porta A, Medeiros LF, Lemos TM, Soares EM, Azevedo GD. Aerobic exercise improves cardiac autonomic modulation in women with polycystic ovary syndrome. Int J Cardiol 2016; 202:356-61. [DOI: 10.1016/j.ijcard.2015.09.031] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Revised: 09/09/2015] [Accepted: 09/19/2015] [Indexed: 02/01/2023]
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18
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Pokrywka A, Zembron-Lacny A, Baldy-Chudzik K, Orysiak J, Sitkowski D, Banach M. The influence of hypoxic physical activity on cfDNA as a new marker of vascular inflammation. Arch Med Sci 2015; 11:1156-63. [PMID: 26788076 PMCID: PMC4697049 DOI: 10.5114/aoms.2015.56341] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2014] [Accepted: 12/12/2014] [Indexed: 02/06/2023] Open
Abstract
The phenomenon of circulating cell-free DNA (cfDNA) is important for many biomedical disciplines including the field of exercise biochemistry and physiology. It is likely that cfDNA is released into the plasma by apoptosis of endothelial cells and circulating endothelial progenitor cells (EPCs), and/or by NETosis of immune cells induced by strenuous exercise. Increases of cfDNA are described to be a potential hallmark for the overtraining syndrome, and might be related to aseptic vascular inflammation in athletes. Yet, the relevance of systemic inflammation and cfDNA with endothelial dysfunction in athletes still remains unclear. In this review article, we provide a current overview of exercise-induced cfDNA release to the circulation with special emphasis on its relationship with apoptosis and NETosis and the effect of hypoxic physical activity on vascular inflammation in athletes.
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Affiliation(s)
- Andrzej Pokrywka
- Department of Applied and Clinical Physiology, University of Zielona Gora, Zielona Gora, Poland
| | - Agnieszka Zembron-Lacny
- Department of Applied and Clinical Physiology, University of Zielona Gora, Zielona Gora, Poland
| | - Katarzyna Baldy-Chudzik
- Department of Molecular Biology of Biological Sciences, University of Zielona Gora, Zielona Gora, Poland
| | - Joanna Orysiak
- Department of Physiological Nutrition, Institute of Sport, Warsaw, Poland
| | | | - Maciej Banach
- Department of Hypertension, Chair of Nephrology and Hypertension, Medical University of Lodz, Lodz, Poland
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19
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Training Status as a Marker of the Relationship between Nitric Oxide, Oxidative Stress, and Blood Pressure in Older Adult Women. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2015; 2015:8262383. [PMID: 26697141 PMCID: PMC4678091 DOI: 10.1155/2016/8262383] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Revised: 08/14/2015] [Accepted: 08/24/2015] [Indexed: 02/07/2023]
Abstract
The purpose of this study was to evaluate the influence of functional fitness and oxidative capacity on the nitric oxide concentration associated with hemodynamic control in older adult women. The sample consisted of 134 women (65.73 ± 6.14 years old). All subjects underwent a physical examination to assess body mass index, waist-hip ratio, body fat measurement by dual energy X-ray absorptiometry, and blood pressure (BP). Training status (TS) was evaluated by indirect determination of maximal oxygen uptake by a treadmill test using Balke protocol modified for older adults. Functional fitness was also evaluated through a “Functional Fitness Battery Test” to determine the general fitness functional index (GFFI). All participants were separated according to the functional fitness (TS1, very weak and weak; TS2, regular; TS3, good and very good). Plasma blood samples were used to evaluate prooxidant and antioxidant activity and nitrite and nitrate concentrations. The general results of this study showed that good levels of TS were related to lower levels of lipoperoxidation and protein damage, higher levels of antioxidant, and higher concentration of nitrite and nitrate. This combination may be responsible for the lower levels of BP in subjects with better TS.
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20
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Villaño D, Vilaplana C, Medina S, Cejuela-Anta R, Martínez-Sanz JM, Gil P, Genieser HG, Ferreres F, Gil-Izquierdo A. Effect of elite physical exercise by triathletes on seven catabolites of DNA oxidation. Free Radic Res 2015; 49:973-83. [PMID: 25786325 DOI: 10.3109/10715762.2015.1025388] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The oxidized nucleoside 8-hydroxy-2'-deoxyguanosine has been widely studied as a marker of DNA oxidation; however, data on the occurrence of other metabolites in plasma that are related to DNA damage are scarce. We have applied an improved, sensitive, robust, and reliable method, involving solid phase extraction and ultrahigh-performance liquid chromatography (UHPLC)-tandem mass spectrometry (MS/MS), to the precise quantitation of seven metabolites in the plasma of 15 elite triathletes after a 2-week training program. All compounds were eluted in the first 1.6 min, with limits of detection and quantification ranging between 0.001 and 0.3 ng.mL(-1) and 0.009 and 0.6 ng.mL(-1), respectively. Four compounds were detected in plasma: guanosine-3'-5'-cyclic monophosphate, 8-hydroxyguanine, 8-hydroxy-2'-deoxyguanosine, and 8-nitroguanosine. After two weeks of training, 8-hydroxyguanine exhibited the highest increase (from 0.031 ± 0.008 nM to 0.036 ± 0.012 nM) (p < 0.05), which could be related to the enhanced activity of DNA-repairing enzymes that excise this oxidized base. Increased levels of guanosine-3'-5'-cyclic monophosphate and 8-hydroxy-2'-deoxyguanosine were also observed. In contrast, levels of 8-nitroguanosine (p < 0.05) were significantly reduced, which might be a protective measure as this compound strongly stimulates the generation of superoxide radicals, and its excess is related to pathologies such as microbial (viral) infections and other inflammatory and degenerative disorders. The results obtained indicate an induced adaptive response to the increased oxidative stress related to elite training, and point to the benefits associated with regular exercise.
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Affiliation(s)
- D Villaño
- Department of Food Science and Technology, CEBAS-CSIC , Murcia , Spain
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21
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da Silva RF, Sertório JTC, Lacchini R, Trapé AA, Tanus-Santos JE, Rush JWE, Amaral SL, Zago AS. Influence of training status and eNOS haplotypes on plasma nitrite concentrations in normotensive older adults: a hypothesis-generating study. Aging Clin Exp Res 2014; 26:591-8. [PMID: 24760600 DOI: 10.1007/s40520-014-0218-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Accepted: 03/25/2014] [Indexed: 01/10/2023]
Abstract
The purpose of this study was to evaluate the relationship between 3 eNOS gene polymorphisms and training status (TS) in affecting plasma nitrite concentration (NO2) in normotensive adults over 50 years old. Resting blood pressure (BP) was measured in all participants (n = 101). Plasma was taken to analyze: lipid profile, nitrite concentration (NO2) and lipid peroxide levels (T-BARS). Also, genomic DNA was extracted from plasma for genotyping NOS3 polymorphisms (-786T>C; 894G>T; and VNTR in intron 4). TS was determined by one-mile walk test and Functional Fitness Test Battery from AAHPERD (TS1-regular TS; TS2-good TS; and TS3-very good TS). BP was not influenced by TS, but NO2 was 15% higher in TS3 (123 ± 27 nM) compared to TS-2 (106 ± 22 nM). No differences were found in plasma NO2 in the haplotype analyses. However, the presence of the C allele (T-786C) and ASP allele (Glu298Asp) was found to enhance the correlation between TS and NO2 levels (r = 0.492 in C/4b/ASP haplotype and r = 0.855 in C/4a/ASP haplotype). This study thus identifies NOS3 polymorphism-dependent sensitivity to the effects of physical training on plasma NO2. Maintenance of good levels of training status, in carriers of C allele for T-786C polymorphism, combined with ASP allele for Glu298Asp polymorphism, may result in an increase in the NO2 plasma concentrations, which may reflect improved NO bioavailability in older adult normotensive individuals.
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22
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Lucke-Wold BP, Logsdon AF, Turner RC, Rosen CL, Huber JD. Aging, the metabolic syndrome, and ischemic stroke: redefining the approach for studying the blood-brain barrier in a complex neurological disease. ADVANCES IN PHARMACOLOGY 2014; 71:411-49. [PMID: 25307225 DOI: 10.1016/bs.apha.2014.07.001] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The blood-brain barrier (BBB) has many important functions in maintaining the brain's immune-privileged status. Endothelial cells, astrocytes, and pericytes have important roles in preserving vasculature integrity. As we age, cell senescence can contribute to BBB compromise. The compromised BBB allows an influx of inflammatory cytokines to enter the brain. These cytokines lead to neuronal and glial damage. Ultimately, the functional changes within the brain can cause age-related disease. One of the most prominent age-related diseases is ischemic stroke. Stroke is the largest cause of disability and is third largest cause of mortality in the United States. The biggest risk factors for stroke, besides age, are results of the metabolic syndrome. The metabolic syndrome, if unchecked, quickly advances to outcomes that include diabetes, hypertension, cardiovascular disease, and obesity. The contribution from these comorbidities to BBB compromise is great. Some of the common molecular pathways activated include: endoplasmic reticulum stress, reactive oxygen species formation, and glutamate excitotoxicity. In this chapter, we examine how age-related changes to cells within the central nervous system interact with comorbidities. We then look at how comorbidities lead to increased risk for stroke through BBB disruption. Finally, we discuss key molecular pathways of interest with a focus on therapeutic targets that warrant further investigation.
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Affiliation(s)
- Brandon P Lucke-Wold
- Department of Neurosurgery, West Virginia University, School of Medicine, Morgantown, West Virginia, USA; The Center for Neuroscience, West Virginia University, School of Medicine, Morgantown, West Virginia, USA
| | - Aric F Logsdon
- The Center for Neuroscience, West Virginia University, School of Medicine, Morgantown, West Virginia, USA; Department of Basic Pharmaceutical Sciences, West Virginia University, School of Pharmacy, Morgantown, West Virginia, USA
| | - Ryan C Turner
- Department of Neurosurgery, West Virginia University, School of Medicine, Morgantown, West Virginia, USA; The Center for Neuroscience, West Virginia University, School of Medicine, Morgantown, West Virginia, USA
| | - Charles L Rosen
- Department of Neurosurgery, West Virginia University, School of Medicine, Morgantown, West Virginia, USA; The Center for Neuroscience, West Virginia University, School of Medicine, Morgantown, West Virginia, USA
| | - Jason D Huber
- The Center for Neuroscience, West Virginia University, School of Medicine, Morgantown, West Virginia, USA; Department of Basic Pharmaceutical Sciences, West Virginia University, School of Pharmacy, Morgantown, West Virginia, USA.
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23
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Merino J, Ferré R, Girona J, Aguas D, Cabré A, Plana N, Vinuesa A, Ibarretxe D, Basora J, Buixadera C, Masana L. Physical activity below the minimum international recommendations improves oxidative stress, ADMA levels, resting heart rate and small artery endothelial function. CLINICA E INVESTIGACION EN ARTERIOSCLEROSIS 2014; 27:9-16. [PMID: 25112554 DOI: 10.1016/j.arteri.2014.04.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Accepted: 04/29/2014] [Indexed: 11/28/2022]
Abstract
BACKGROUND A moderate level of physical activity (PA), such as a daily 30-min walk, reduces cardiovascular risk. There is a lack of evidence about the cardiovascular benefits of PA below this recommendation of minimum PA level. OBJECTIVE We aimed to study the impact of a lower level of PA on cardiovascular health. DESIGN Sixty-four overweight/obese men and women were enrolled in a community programme consisting of 4 months of 1h, low-intensity PA two days per week. Before and after the intervention, PA level (METs/h/wk), endogenous antioxidant status (SOD and GPX concentration and activity and oxidised LDL), ADMA concentrations, endothelial function by small artery reactive hyperaemia index (saRHI), and resting heart rate (RHR) were assessed. RESULTS After the intervention, significant increases in saRHI (P=0.031), SOD and GPX activities, and a decrease in ADMA plasma concentrations, and RHR (P<0.001 for all) were observed. Increases in PA were positively associated with increases in saRHI (r=0.341, P=0.022), GPx (r=0.303, P=0.047) and decreases in RHR (r=-0.302, P=0.047). Multivariate analyses showed that independent predictors of saRHI improvement were an increase in PA (2.65, 95%CI: 1.21-4.01), decrease in RHR (1.91, 95%CI: 1.01-4.98), and an increase in GPx (2.61, 95%CI: 1.16-5.01). CONCLUSION In obese and overweight men and women, an increase in PA, even below the minimal international recommendations, improves antioxidant capacity, RHR and peripheral small artery reactivity.
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Affiliation(s)
- J Merino
- Vascular Medicine and Metabolism Unit and Research Unit on Lipids and Atherosclerosis, Sant Joan University Hospital, IISPV, Rovira i Virgili University, Reus, Tarragona, Spain; Spanish Biomedical Research Network in Diabetes and Associated Metabolic Disorders (CIBERDEM), Barcelona, Spain.
| | - R Ferré
- Vascular Medicine and Metabolism Unit and Research Unit on Lipids and Atherosclerosis, Sant Joan University Hospital, IISPV, Rovira i Virgili University, Reus, Tarragona, Spain; Spanish Biomedical Research Network in Diabetes and Associated Metabolic Disorders (CIBERDEM), Barcelona, Spain
| | - J Girona
- Vascular Medicine and Metabolism Unit and Research Unit on Lipids and Atherosclerosis, Sant Joan University Hospital, IISPV, Rovira i Virgili University, Reus, Tarragona, Spain; Spanish Biomedical Research Network in Diabetes and Associated Metabolic Disorders (CIBERDEM), Barcelona, Spain
| | - D Aguas
- Reus Esport i Lleure, Ajuntament de Reus, Reus, Tarragona, Spain
| | - A Cabré
- Vascular Medicine and Metabolism Unit and Research Unit on Lipids and Atherosclerosis, Sant Joan University Hospital, IISPV, Rovira i Virgili University, Reus, Tarragona, Spain; Spanish Biomedical Research Network in Diabetes and Associated Metabolic Disorders (CIBERDEM), Barcelona, Spain
| | - N Plana
- Vascular Medicine and Metabolism Unit and Research Unit on Lipids and Atherosclerosis, Sant Joan University Hospital, IISPV, Rovira i Virgili University, Reus, Tarragona, Spain; Spanish Biomedical Research Network in Diabetes and Associated Metabolic Disorders (CIBERDEM), Barcelona, Spain
| | - A Vinuesa
- Atención Primaria, Institut Català de la Salut, Tarragona, Spain; Institut d'Investigació en Atenció Primària IDIAP Jordi Gol, Catalunya, Spain
| | - D Ibarretxe
- Vascular Medicine and Metabolism Unit and Research Unit on Lipids and Atherosclerosis, Sant Joan University Hospital, IISPV, Rovira i Virgili University, Reus, Tarragona, Spain; Spanish Biomedical Research Network in Diabetes and Associated Metabolic Disorders (CIBERDEM), Barcelona, Spain
| | - J Basora
- Atención Primaria, Institut Català de la Salut, Tarragona, Spain; Institut d'Investigació en Atenció Primària IDIAP Jordi Gol, Catalunya, Spain
| | - C Buixadera
- Vascular Medicine and Metabolism Unit and Research Unit on Lipids and Atherosclerosis, Sant Joan University Hospital, IISPV, Rovira i Virgili University, Reus, Tarragona, Spain; Spanish Biomedical Research Network in Diabetes and Associated Metabolic Disorders (CIBERDEM), Barcelona, Spain
| | - L Masana
- Vascular Medicine and Metabolism Unit and Research Unit on Lipids and Atherosclerosis, Sant Joan University Hospital, IISPV, Rovira i Virgili University, Reus, Tarragona, Spain; Spanish Biomedical Research Network in Diabetes and Associated Metabolic Disorders (CIBERDEM), Barcelona, Spain
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de Miranda JA, Lacchini R, Belo VA, Lanna CMM, Sertorio JT, Luizon MR, Tanus-Santos JE. The effects of endothelial nitric oxide synthase tagSNPs on nitrite levels and risk of hypertension and obesity in children and adolescents. J Hum Hypertens 2014; 29:109-14. [PMID: 24943287 DOI: 10.1038/jhh.2014.48] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 05/07/2014] [Accepted: 05/13/2014] [Indexed: 12/29/2022]
Abstract
Obesity and the nitric oxide synthase 3 (NOS3) gene polymorphisms are associated with nitrite levels and hypertension. However, no study has tested the hypothesis that NOS3 tagSNPs rs3918226, rs3918188, rs743506 and rs7830 affect nitrite levels and are associated with hypertension in childhood obesity. We investigated the association of these NOS3 tagSNPs and the haplotypes formed by them with hypertension and with nitrite levels in children and adolescents with obesity and with obesity plus hypertension. We studied 355 subjects: 174 healthy (controls), 109 normotensive obese, and 72 obese children and adolescents with obesity plus hypertension. Genotypes were determined by Taqman allele discrimination assay and real-time PCR. We compared the distribution of NOS3 tagSNP genotypes, alleles and haplotypes in the three groups of subjects. Nitrite levels were determined by ozone-based chemiluminescence. Nitrite levels were affected by the rs3918226 polymorphism (P<0.05) but not by NOS3 haplotypes. There was no association between the tagSNPs studied and hypertension in children and adolescents. Our findings show that the NOS3 tagSNP rs3918226 is associated with NO production in children and adolescents, and suggest that this polymorphism may have an impact on cardiovascular health. Further studies are needed to better clarify the effects of this polymorphism on cardiovascular risk.
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Affiliation(s)
- J A de Miranda
- Department of Pharmacology, State University of Campinas, Campinas, SP, Brazil
| | - R Lacchini
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - V A Belo
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - C M M Lanna
- Department of Physiology, Institute of Biologic Science, Federal University of Juiz de Fora, University Campus, Juiz de Fora, MG, Brazil
| | - J T Sertorio
- Department of Pharmacology, State University of Campinas, Campinas, SP, Brazil
| | - M R Luizon
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - J E Tanus-Santos
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil
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Tanahashi K, Akazawa N, Miyaki A, Choi Y, Ra SG, Matsubara T, Kumagai H, Oikawa S, Maeda S. Aerobic exercise training decreases plasma asymmetric dimethylarginine concentrations with increase in arterial compliance in postmenopausal women. Am J Hypertens 2014; 27:415-21. [PMID: 24280041 DOI: 10.1093/ajh/hpt217] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Asymmetric dimethylarginine (ADMA), an endogenous inhibitor of nitric oxide synthase, increase with advancing age and menopausal status. ADMA plays a role in endothelial dysfunction and increasing arterial stiffness. Regular aerobic exercise has a positive effect on arterial function (i.e., arterial compliance). This study investigated the effects of aerobic exercise training on plasma ADMA concentrations and arterial compliance in postmenopausal women. METHODS Thirty postmenopausal women were divided into 2 groups: an exercise group (n = 20) and a control group (n = 10). Subjects in the exercise group completed 12 weeks of aerobic exercise training (65%-80% of maximal heart rate, 40-60 min/day, 3-6 days/week). Before and after each intervention, plasma ADMA concentrations and carotid arterial compliance were measured in all participants. RESULTS The baseline plasma ADMA concentrations, carotid arterial compliance, and most other key dependent variables did not differ between the 2 groups. In the exercise group, carotid arterial compliance significantly increased after exercise intervention (P < 0.01), and plasma ADMA concentrations significantly decreased (P < 0.05). In addition, changes in carotid arterial compliance after the exercise intervention were inversely correlated with changes in plasma ADMA concentrations (r = -0.367; P < 0.05). CONCLUSIONS We demonstrated that aerobic exercise training significantly decreased plasma ADMA concentrations with increase in carotid arterial compliance in postmenopausal women. These results suggest that reduction in ADMA may play an important role in the aerobic exercise training-induced increase in arterial compliance.
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Affiliation(s)
- Koichiro Tanahashi
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
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Even low physical activity levels improve vascular function in overweight and obese postmenopausal women. Menopause 2013; 20:1036-42. [DOI: 10.1097/gme.0b013e31828501c9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Pattyn N, Cornelissen VA, Eshghi SRT, Vanhees L. The effect of exercise on the cardiovascular risk factors constituting the metabolic syndrome: a meta-analysis of controlled trials. Sports Med 2013; 43:121-33. [PMID: 23329606 PMCID: PMC3693431 DOI: 10.1007/s40279-012-0003-z] [Citation(s) in RCA: 182] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Background Numerous meta-analyses have investigated the effect of exercise in different populations and for single cardiovascular risk factors, but none have specifically focused on the metabolic syndrome (MetS) patients and the concomitant effect of exercise on all associated cardiovascular risk factors. Objective The aim of this article was to perform a systematic review with a meta-analysis of randomized and clinical controlled trials (RCTs, CTs) investigating the effect of exercise on cardiovascular risk factors in patients with the MetS. Methods RCTs and CTs ≥4 weeks investigating the effect of exercise in healthy adults with the MetS and published in a peer-reviewed journal up to November 2011 were included. Primary outcome measures were changes in waist circumference (WC), systolic and diastolic blood pressure, high-density lipoprotein cholesterol (HDL-C), triglycerides and fasting plasma glucose. Peak oxygen uptake (\documentclass[12pt]{minimal}
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\begin{document}$$ {\dot{{V}}\text{O}}_{{ 2 {\text{peak}}}} $$\end{document}) was a secondary outcome. Random and fixed-effect models were used for analyses and data are reported as means and 95% confidence intervals (CIs). Results Seven trials were included, involving nine study groups and 206 participants (128 in exercise group and 78 in control group). Significant mean reductions in WC −3.4 (95% CI −4.9, −1.8) cm, blood pressure −7.1 (95% CI −9.03, −5.2)/−5.2 (95% CI −6.2, −4.1) mmHg and a significant mean increase in HDL-C +0.06 (95% CI +0.03, +0.09) mmol/L were observed after dynamic endurance training. Mean plasma glucose levels −0.31 (95% CI −0.64, 0.01; p = 0.06) mmol/L and triglycerides −0.05 (95% CI −0.20, 0.09; p = 0.47) mmol/L remained statistically unaltered. In addition, a significant mean improvement in \documentclass[12pt]{minimal}
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\begin{document}$$ {\dot{{V}}\text{O}}_{{ 2 {\text{peak}}}} $$\end{document} of +5.9 (95% CI +3.03, +8.7) mL/kg/min or 19.3% was found. Conclusions Our results suggest that dynamic endurance training has a favourable effect on most of the cardiovascular risk factors associated with the MetS. However, in the search for training programmes that optimally improve total cardiovascular risk, further research is warranted, including studies on the effects of resistance training and combined resistance and endurance training.
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Affiliation(s)
- Nele Pattyn
- Department of Rehabilitation Sciences, KU Leuven, Louvain, Belgium.
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EGUCHI M, OHTA M, YAMATO H. The effects of single long and accumulated short bouts of exercise on cardiovascular risks in male Japanese workers: a randomized controlled study. INDUSTRIAL HEALTH 2013; 51:563-571. [PMID: 23892902 PMCID: PMC4202748 DOI: 10.2486/indhealth.2013-0023] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2013] [Accepted: 07/08/2013] [Indexed: 06/02/2023]
Abstract
The aim of this study was to determine whether accumulated short bouts of exercise can achieve the same cardiovascular benefits as a single long bout of exercise in sedentary male Japanese workers and to compare the programs' relative effects on oxidative stress. Twenty-three sedentary male workers were randomly assigned into 2 different exercise programs: a Long-bout group, which performed a single period of continuous exercise (Long-bout group: 30 min × 1) 3 d per week, and a Short-bouts group, which performed 3 short bouts of exercise (Short-bouts group: 10 min × 3) 3 d per week. Cardiovascular risk factors, including the plasma thiobarbituric acid-reactive substances (TBARS) level, were examined at baseline and after both 10 and 20 wk. In the Long-bout group, waist circumference and maximum oxygen uptake (VO2max) significantly improved after 20 wk. The Short-bouts group demonstrated significant increases in VO2max after 10 weeks and in HDL-C after 20 wk. Plasma TBARS significantly decreased after 20 weeks in the Long-bout group and tended to decrease (but not significantly) in the Short-bouts group. These results indicate that accumulated short bouts of exercise are an effective option, especially for busy workers, for incorporating exercise into one's lifestyle.
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Affiliation(s)
- Masafumi EGUCHI
- Department of Health Development, Institute of Industrial
Ecological Sciences, University of Occupational and Environmental Health, Japan
| | - Masanori OHTA
- Department of Health Development, Institute of Industrial
Ecological Sciences, University of Occupational and Environmental Health, Japan
| | - Hiroshi YAMATO
- Department of Health Development, Institute of Industrial
Ecological Sciences, University of Occupational and Environmental Health, Japan
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Trapé AA, Jacomini AM, Muniz JJ, Sertorio JTC, Tanus-Santos JE, do Amaral SL, Zago AS. The relationship between training status, blood pressure and uric acid in adults and elderly. BMC Cardiovasc Disord 2013; 13:44. [PMID: 23799981 PMCID: PMC3695764 DOI: 10.1186/1471-2261-13-44] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2012] [Accepted: 06/17/2013] [Indexed: 11/23/2022] Open
Abstract
Background Hypertension can be generated by a great number of mechanisms including elevated uric acid (UA) that contribute to the anion superoxide production. However, physical exercise is recommended to prevent and/or control high blood pressure (BP). The purpose of this study was to investigate the relationship between BP and UA and whether this relationship may be mediated by the functional fitness index. Methods All participants (n = 123) performed the following tests: indirect maximal oxygen uptake (VO2max), AAHPERD Functional Fitness Battery Test to determine the general fitness functional index (GFFI), systolic and diastolic blood pressure (SBP and DBP), body mass index (BMI) and blood sample collection to evaluate the total-cholesterol (CHOL), LDL-cholesterol (LDL-c), HDL-cholesterol (HDL-c), triglycerides (TG), uric acid (UA), nitrite (NO2) and thiobarbituric acid reactive substances (T-BARS). After the physical, hemodynamic and metabolic evaluations, all participants were allocated into three groups according to their GFFI: G1 (regular), G2 (good) and G3 (very good). Results Baseline blood pressure was higher in G1 when compared to G3 (+12% and +11%, for SBP and DBP, respectively, p<0.05) and the subjects who had higher values of BP also presented higher values of UA. Although UA was not different among GFFI groups, it presented a significant correlation with GFFI and VO2max. Also, nitrite concentration was elevated in G3 compared to G1 (140±29 μM vs 111± 29 μM, for G3 and G1, respectively, p<0.0001). As far as the lipid profile, participants in G3 presented better values of CHOL and TG when compared to those in G1. Conclusions Taking together the findings that subjects with higher BP had elevated values of UA and lower values of nitrite, it can be suggested that the relationship between blood pressure and the oxidative stress produced by acid uric may be mediated by training status.
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Cerecero P, Hernández-Prado B, Denova E, Valdés R, Vázquez G, Camarillo E, Huitrón G. Association between serum uric acid levels and cardiovascular risk among university workers from the State of Mexico: a nested case-control study. BMC Public Health 2013; 13:415. [PMID: 23631758 PMCID: PMC3648412 DOI: 10.1186/1471-2458-13-415] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2012] [Accepted: 04/09/2013] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Recent evidence suggests that serum uric acid (SUA) can be an inexpensive and easy-to-obtain indicator of cardiovascular risk (CR). This is especially important in developing countries with high prevalence of cardiovascular disease. We examined the association between SUA levels and 10-year global CR among university workers from the State of Mexico, Mexico. METHODS A case-control study nested within a cohort was conducted between 2004 and 2006. Anthropometric measures, lifestyle variables, family background and CR factors were assessed. The analysis estimated odds ratios using conditional logistic regression. RESULTS The study included 319 cases with CR and 638 controls. Subjects in the upper tertile of SUA had 48.0% higher odds of having an elevated CR than those in the lower tertile (OR = 1.48, 95% CI: 1.04-2.10) in the crude analysis, but the association was non-significant when adjusting for other covariates. Among physically inactive individuals, being in the third tertile of SUA doubled the odds of high CR, compared with those who perform physical activity three or more hours per week being in the first tertile of SUA (OR = 2.35, 95% CI: 1.24-4.45). CONCLUSION Serum concentration of uric acid is associated with 10-year global CR among individuals with high levels of physical inactivity.
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Affiliation(s)
- Patricia Cerecero
- Centro de Investigación en Ciencias Médicas, Universidad Autónoma del Estado de México, Toluca, México
| | - Bernardo Hernández-Prado
- Institute for Health Metrics and Evaluation, University of Washington, Seattle, WA, USA
- Instituto Nacional de Salud Pública, Cuernavaca, Morelos, México
| | - Edgar Denova
- Centro de Investigación en Ciencias Médicas, Universidad Autónoma del Estado de México, Toluca, México
| | - Roxana Valdés
- Centro de Investigación y Estudios de Posgrado en Ciencias de la Salud Universidad Autónoma del Estado de México, Toluca, México
| | - Gilberto Vázquez
- Centro de Investigación en Ciencias Médicas, Universidad Autónoma del Estado de México, Toluca, México
| | - Eneida Camarillo
- Centro de Investigación en Ciencias Médicas, Universidad Autónoma del Estado de México, Toluca, México
| | - Gerardo Huitrón
- Centro de Investigación en Ciencias Médicas, Universidad Autónoma del Estado de México, Toluca, México
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Toschi-Dias E, Trombetta IC, Dias da Silva VJ, Maki-Nunes C, Cepeda FX, Alves MJNN, Drager LF, Lorenzi-Filho G, Negrao CE, Rondon MUPB. Time delay of baroreflex control and oscillatory pattern of sympathetic activity in patients with metabolic syndrome and obstructive sleep apnea. Am J Physiol Heart Circ Physiol 2013; 304:H1038-44. [PMID: 23355343 DOI: 10.1152/ajpheart.00848.2012] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The incidence and strength of muscle sympathetic nerve activity (MSNA) depend on the magnitude (gain) and latency (time delay) of the arterial baroreflex control (ABR). However, the impact of metabolic syndrome (MetS) and obstructive sleep apnea (OSA) on oscillatory pattern of MSNA and time delay of the ABR of sympathetic activity is unknown. We tested the hypothesis that MetS and OSA would impair the oscillatory pattern of MSNA and the time delay of the ABR of sympathetic activity. Forty-three patients with MetS were allocated into two groups according to the presence of OSA (MetS + OSA, n = 21; and MetS - OSA, n = 22). Twelve aged-paired healthy controls (C) were also studied. OSA (apnea-hypopnea index > 15 events/h) was diagnosed by polysomnography. We recorded MSNA (microneurography), blood pressure (beat-to-beat basis), and heart rate (EKG). Oscillatory pattern of MSNA was evaluated by autoregressive spectral analysis and the ABR of MSNA (ABRMSNA, sensitivity and time delay) by bivariate autoregressive analysis. Patients with MetS + OSA had decreased oscillatory pattern of MSNA compared with MetS - OSA (P < 0.01) and C (P < 0.001). The sensitivity of the ABRMSNA was lower and the time delay was greater in MetS + OSA compared with MetS - OSA (P < 0.001 and P < 0.01, respectively) and C (P < 0.001 and P < 0.001, respectively). Patients with MetS - OSA showed decreased oscillatory pattern of MSNA compared with C (P < 0.01). The sensitivity of the ABRMSNA was lower in MetS - OSA than in C group (P < 0.001). In conclusion, MetS decreases the oscillatory pattern of MSNA and the magnitude of the ABRMSNA. OSA exacerbates these autonomic dysfunctions and further increases the time delay of the baroreflex response of MSNA.
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Affiliation(s)
- Edgar Toschi-Dias
- Heart Institute (Instituto do Coração University of Sao Paulo Medical School, Sao Paulo, Brazil
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Miranda JA, Belo VA, Souza-Costa DC, Lanna CMM, Tanus-Santos JE. eNOS polymorphism associated with metabolic syndrome in children and adolescents. Mol Cell Biochem 2012; 372:155-60. [PMID: 22983816 DOI: 10.1007/s11010-012-1456-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2012] [Accepted: 09/05/2012] [Indexed: 01/16/2023]
Abstract
We investigated whether genetic polymorphisms in the endothelial nitric oxide (eNOS) gene (T(786)C in the promoter region, Glu298Asp in exon 7, and 4b/4a in intron 4) or eNOS haplotypes are associated with metabolic syndrome (MetS) in obese children and adolescents. We studied 242 subjects: 108 healthy (controls), 64 normotensive obese, and 70 obese children and adolescents with MetS. Genotypes were determined by Taqman(®) allele discrimination assay and real-time polymerase chain reaction (PCR), and PCR followed by fragment separation by electrophoresis. We compared the distribution of eNOS genotypes, alleles, and haplotypes in the three groups of subjects. The CC genotype for the T(786)C polymorphism was more common in the MetS group than in the control group (OR = 3.27; CI 1.81-9.07; P < 0.05). However, we found no significant differences in the distribution of eNOS haplotypes (P > 0.00625; P for significance after correction for multiple comparisons). Our findings suggest that while eNOS haplotypes are not relevant, the CC genotype for the T(786)C polymorphism is associated with MetS in obese children and adolescents. Further studies examining interactions of eNOS haplotypes with environmental factors and other genetic markers are warranted.
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Affiliation(s)
- Josiane A Miranda
- Department of Pharmacology, State University of Campinas, Campinas, SP 13081-970, Brazil
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Abstract
Metabolic osteoarthritis (OA) has now been characterized as a subtype of OA, and links have been discovered between this phenotype and metabolic syndrome (MetS)--both with individual MetS components and with MetS as a whole. Hypertension associates with OA through subchondral ischaemia, which can compromise nutrient exchange into articular cartilage and trigger bone remodelling. Ectopic lipid deposition in chondrocytes induced by dyslipidemia might initiate OA development, exacerbated by deregulated cellular lipid metabolism in joint tissues. Hyperglycaemia and OA interact at both local and systemic levels; local effects of oxidative stress and advanced glycation end-products are implicated in cartilage damage, whereas low-grade systemic inflammation results from glucose accumulation and contributes to a toxic internal environment that can exacerbate OA. Obesity-related metabolic factors, particularly altered levels of adipokines, contribute to OA development by inducing the expression of proinflammatory factors as well as degradative enzymes, leading to the inhibition of cartilage matrix synthesis and stimulation of subchondral bone remodelling. In this Review, we summarize the shared mechanisms of inflammation, oxidative stress, common metabolites and endothelial dysfunction that characterize the aetiologies of OA and MetS, and nominate metabolic OA as the fifth component of MetS. We also describe therapeutic opportunities that might arise from uniting these concepts.
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Affiliation(s)
- Qi Zhuo
- Department of Orthopaedics, Chinese PLA General Hospital, Fuxing Road 28#, Haidian District, Beijing 100853, People's Republic of China
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Siervo M, Bluck LJC. In vivo nitric oxide synthesis, insulin sensitivity, and asymmetric dimethylarginine in obese subjects without and with metabolic syndrome. Metabolism 2012; 61:680-8. [PMID: 22146092 DOI: 10.1016/j.metabol.2011.10.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2011] [Revised: 09/23/2011] [Accepted: 10/08/2011] [Indexed: 10/14/2022]
Abstract
Metabolic syndrome (MetSyn) is associated with impaired endothelial function. Here the association between nitric oxide (NO) production and insulin sensitivity (Si) in obese subjects with and without MetSyn was evaluated. The relationship between NO production and asymmetric dimethylarginine (ADMA) was also explored. Seven healthy normal-weight subjects (male/female [M/F], 3/4; age, 27.4 ± 10.9 years; body mass index [BMI], 21.9 ± 2.2 kg/m(2)), 7 obese subjects without MetSyn (M/F, 1/6; age, 48.0 ± 8.0 years; BMI, 34.5 ± 2.3 kg/m(2)), and 7 with MetSyn (M/F, 3/4; age, 48.0 ± 10.7 years; BMI, 33.4 ± 2.9 kg/m(2)) were recruited. Body composition and cardiometabolic functions (blood pressure, glucose, insulin, triglycerides, total cholesterol, high-density lipoprotein, ADMA) were measured. A frequent sampling intravenous glucose tolerance test was performed to measure Si. A novel stable isotopic method was used to measure in vivo rates of NO production. The NO production was lower in obese subjects with MetSyn compared with normal-weight subjects and obese subjects without MetSyn. Similarly, Si was significantly lower in obesity, both without and with MetSyn, compared with the control group. A significant direct association was found between NO synthesis and Si (ρ = 0.47, P = .03). Circulating levels of ADMA were significantly higher in the obese group with MetSyn. A nonsignificant negative trend between ADMA and NO synthesis was observed. The association between Si and NO production suggests a close mechanistic link between endothelial function and insulin signaling. The results may be highly informative for the development of controlled longitudinal interventions to improve endothelial and metabolic regulation.
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Affiliation(s)
- Mario Siervo
- MRC Human Nutrition Research, Elsie Widdowson, Laboratory, Fulbourn Rd, Cambridge CB1 9NL, United Kingdom
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Sympathoinhibitory effects of statins in chronic kidney disease: are they clinically relevant? J Hypertens 2012; 29:2064-7. [PMID: 21989380 DOI: 10.1097/hjh.0b013e32834bcaf8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Sales ARK, Silva BM, Neves FJ, Rocha NG, Medeiros RF, Castro RRT, Nóbrega ACL. Diet and exercise training reduce blood pressure and improve autonomic modulation in women with prehypertension. Eur J Appl Physiol 2012; 112:3369-78. [DOI: 10.1007/s00421-012-2315-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2011] [Accepted: 01/05/2012] [Indexed: 02/07/2023]
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Hamed EA, Zakary MM, Ahmed NS, Gamal RM. Circulating leptin and insulin in obese patients with and without type 2 diabetes mellitus: relation to ghrelin and oxidative stress. Diabetes Res Clin Pract 2011; 94:434-41. [PMID: 21924513 DOI: 10.1016/j.diabres.2011.08.023] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2011] [Revised: 08/02/2011] [Accepted: 08/19/2011] [Indexed: 12/22/2022]
Abstract
AIM This case control study aimed to investigate relationship between appetite hormones (ghrelin and leptin) and body mass index (BMI), insulin and oxidative stress in simple obese and type 2 diabetes (T2DM) obese patients. METHODS Thirty healthy controls; 30 simple obese and 30 T2DM obese patients were enrolled. Demographic and clinical data of all participants were reported. Serum levels of fasting blood glucose (FBG), postprandial blood glucose (PBG), lipid peroxide (LPO) and nitric oxide (NO) were measured by chemical methods while, insulin, leptin and ghrelin by ELISA kits. RESULTS Serum levels of insulin, leptin, LPO were significantly higher while, ghrelin was significantly lower in simple obese and obese patients with diabetes versus controls. Insulin resistance was found in 76.67% simple obese and 93.33% obese patients with diabetes. Ghrelin showed a positive correlation with PBG in controls; but negative correlation with BMI in simple obese and with NO in obese patients with diabetes. Positive correlations were found between LPO and FBG, insulin, homeostasis model assessment of insulin resistance (HOMA-IR) and between leptin and FBG in obese patients with diabetes. CONCLUSIONS Our results suggested that hyperinsulinemia and hyperleptinemia may be most important mechanisms in decreasing ghrelin and inducing oxidative stress in simple obese and T2DM obese patients.
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Affiliation(s)
- Enas A Hamed
- Department of Physiology, Faculty of Medicine, Assiut University, P.O. Box 71526, Assiut, Egypt.
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Codoñer-Franch P, Valls-Bellés V, Arilla-Codoñer A, Alonso-Iglesias E. Oxidant mechanisms in childhood obesity: the link between inflammation and oxidative stress. Transl Res 2011; 158:369-84. [PMID: 22061044 DOI: 10.1016/j.trsl.2011.08.004] [Citation(s) in RCA: 109] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2011] [Revised: 07/19/2011] [Accepted: 08/08/2011] [Indexed: 12/17/2022]
Abstract
Evidence of obesity-induced oxidative stress in adults has emerged in the past several years, and similar evidence has been demonstrated in children more recently. The reactive species of oxygen or nitrogen can chemically alter all major classes of biomolecules by modifying their structure and function. Organisms have developed mechanisms to protect biomolecules from the deleterious effects of free radicals. These include the enzymes superoxide dismutase, catalase, and glutathione peroxidase, as well as water and lipid-soluble antioxidants, such as glutathione, ascorbate (vitamin C), α-tocopherol (vitamin E), and β-carotene. Obesity creates oxidant conditions that favor the development of comorbid diseases. Energy imbalances lead to the storage of excess energy in adipocytes, resulting in both hypertrophy and hyperplasia. These processes are associated with abnormalities of adipocyte function, particularly mitochondrial stress and disrupted endoplasmic reticulum function. In this sense, oxidative stress can also be induced by adipocyte associated inflammatory macrophages. There is a close link among obesity, a state of chronic low-level inflammation, and oxidative stress. In addition, the dysregulation of adipocytokines, which are secreted by adipose tissue and promoted by oxidative stress, act synergistically in obesity-related metabolic abnormalities. Adipocytokines link the local and systemic inflammation responses in the context of obesity. It is thought that the evaluation of oxidative status may allow for the identification of patients at an increased risk of complications. Decreasing the levels of chronic inflammation and oxidative stress in childhood may decrease cardiovascular morbidity and mortality in adulthood.
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Codoñer-Franch P, Tavárez-Alonso S, Murria-Estal R, Megías-Vericat J, Tortajada-Girbés M, Alonso-Iglesias E. Nitric oxide production is increased in severely obese children and related to markers of oxidative stress and inflammation. Atherosclerosis 2011; 215:475-80. [PMID: 21300354 DOI: 10.1016/j.atherosclerosis.2010.12.035] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Revised: 12/08/2010] [Accepted: 12/24/2010] [Indexed: 10/18/2022]
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Palomo I, Contreras A, Alarcón LM, Leiva E, Guzmán L, Mujica V, Icaza G, Díaz N, González DR, Moore-Carrasco R. Elevated concentration of asymmetric dimethylarginine (ADMA) in individuals with metabolic syndrome. Nitric Oxide 2011; 24:224-8. [PMID: 21419857 DOI: 10.1016/j.niox.2011.03.002] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2010] [Revised: 02/03/2011] [Accepted: 03/13/2011] [Indexed: 01/28/2023]
Abstract
The metabolic syndrome (MS) is a cluster of pathophysiological alterations that includes the presence of hypertension, insulin resistance, dyslipidemia, and abdominal obesity. MS is associated with increased risk of developing diabetes and cardiovascular diseases. Endothelial dysfunction with impaired nitric oxide (NO) bioavailability has been implicated in insulin resistance and hypertension. NO is synthesized by nitric oxide synthase (NOS) using l-arginine as substrate. Asymmetric dimethyl arginine (ADMA) is a major and potent endogenous NOS inhibitor, associated with cardiovascular and renal diseases. We tested the hypothesis that plasmatic ADMA levels are increased in patients with MS. We studied 85 adult individuals from Talca, Chile, separated in two groups, 48 individuals with MS (according to modified ATP III criteria), and 37 individuals without MS as controls. ADMA levels were significantly increased in the MS group (mean±standard deviation 0.71±0.38 vs. 0.48±0.28μmol/L, p=0.0009). Furthermore, the levels of ADMA were modestly but significantly correlated with waist circumference (p=0.01) but not with the other components of MS (blood pressure, glycemia, triglycerides and high density lipoprotein cholesterol HDL-c). These results suggest a possible link between increased ADMA levels and the MS.
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Affiliation(s)
- Iván Palomo
- Departamento de Bioquímica Clínica e Inmunohematología, Facultad de Ciencias de la Salud, Universidad de Talca, Talca, Chile.
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Hanssen H, Nickel T, Drexel V, Hertel G, Emslander I, Sisic Z, Lorang D, Schuster T, Kotliar KE, Pressler A, Schmidt-Trucksäss A, Weis M, Halle M. Exercise-induced alterations of retinal vessel diameters and cardiovascular risk reduction in obesity. Atherosclerosis 2011; 216:433-9. [PMID: 21392768 DOI: 10.1016/j.atherosclerosis.2011.02.009] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2010] [Revised: 01/22/2011] [Accepted: 02/08/2011] [Indexed: 12/01/2022]
Abstract
BACKGROUND The retinal microcirculation is affected early in the process of atherosclerosis and retinal vessel caliber is an emerging cardiovascular risk factor. Obesity is associated with vascular dysfunction. Here, we investigate the effect of regular exercise on retinal vessel diameters in lean and obese runners. We analyze a possible link to alterations of the nitric oxide (NO)-asymmetric dimethylarginine (ADMA) pathway. METHODS Retinal vessel diameters were assessed by means of a static vessel analyzer (SVA-T) in 15 obese athletes (OA), 14 lean amateur athletes (AA) and 17 lean elite athletes (EA) following a 10 week training program. ADMA serum levels were detected by ELISA and dimethylarginine dimethylaminohydrolase (DDAH) -1/-2 mRNA-expression in peripheral mononuclear cells (PBMC) was analyzed by real time PCR. RESULTS At baseline, the mean (±SD) arteriolar to venular diameter ratio (AVR) was impaired in obese (OA: 0.81±0.05) compared to lean subjects (AA: 0.87±0.07; EA: 0.94±0.05). The individual fitness levels correlated with AVR (rho=+0.66; P<0.001) and the training program improved AVR in all groups (P<0.001), normalising AVR in the obese (OA: 0.86±0.1). A training-induced arteriolar dilatation was found in OA (P=0.01), which was accompanied by a significant decrease of ADMA levels (0.56±0.12-0.46±0.12 μmoll(-1); P<0.028). DDAH-1 mRNA levels in PBMC increased in all groups (P<0.01). CONCLUSIONS Cardiovascular fitness and body composition affect retinal vessel diameters. Regular exercise reverses the subclinical impairment of the retinal microvasculature in obesity by inducing retinal arteriolar dilatation. The NO/ADMA pathway may play a key role in the training-induced improvement of microvascular function, which has the potential to counteract progression of small vessel disease.
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Affiliation(s)
- H Hanssen
- Department of Prevention and Sports Medicine, Klinikum rechts der Isar, Technische Universität München, Munich, Germany.
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McCullough DJ, Davis RT, Dominguez JM, Stabley JN, Bruells CS, Behnke BJ. Effects of aging and exercise training on spinotrapezius muscle microvascular PO2 dynamics and vasomotor control. J Appl Physiol (1985) 2011; 110:695-704. [PMID: 21212242 DOI: 10.1152/japplphysiol.01084.2010] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
With advancing age, there is a reduction in exercise tolerance, resulting, in part, from a perturbed ability to match O(2) delivery to uptake within skeletal muscle. In the spinotrapezius muscle (which is not recruited during incline treadmill running) of aged rats, we tested the hypotheses that exercise training will 1) improve the matching of O(2) delivery to O(2) uptake, evidenced through improved microvascular Po(2) (Pm(O(2))), at rest and throughout the contractions transient; and 2) enhance endothelium-dependent vasodilation in first-order arterioles. Young (Y, ∼6 mo) and aged (O, >24 mo) Fischer 344 rats were assigned to control sedentary (YSED; n = 16, and OSED; n = 15) or exercise-trained (YET; n = 14, and OET; n = 13) groups. Spinotrapezius blood flow (via radiolabeled microspheres) was measured at rest and during exercise. Phosphorescence quenching was used to quantify Pm(O(2)) in vivo at rest and across the rest-to-twitch contraction (1 Hz, 5 min) transition in the spinotrapezius muscle. In a follow-up study, vasomotor responses to endothelium-dependent (acetylcholine) and -independent (sodium nitroprusside) stimuli were investigated in vitro. Blood flow to the spinotrapezius did not increase above resting values during exercise in either young or aged groups. Exercise training increased the precontraction baseline Pm(O(2)) (OET 37.5 ± 3.9 vs. OSED 24.7 ± 3.6 Torr, P < 0.05); the end-contracting Pm(O(2)) and the time-delay before Pm(O(2)) fell in the aged group but did not affect these values in the young. Exercise training improved maximal vasodilation in aged rats to acetylcholine (OET 62 ± 16 vs. OSED 27 ± 16%) and to sodium nitroprusside in both young and aged rats. Endurance training of aged rats enhances the Pm(O(2)) in a nonrecruited skeletal muscle and is associated with improved vascular smooth muscle function. These data support the notion that improvements in vascular function with exercise training are not isolated to the recruited muscle.
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Affiliation(s)
- Danielle J McCullough
- Dept. of Applied Physiology & Kinesiology, Univ. of Florida, Gainesville, FL 32611, USA
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Zago AS, Park JY, Fenty-Stewart N, Silveira LR, Kokubun E, Brown MD. Effects of aerobic exercise on the blood pressure, oxidative stress and eNOS gene polymorphism in pre-hypertensive older people. Eur J Appl Physiol 2010; 110:825-32. [PMID: 20614130 DOI: 10.1007/s00421-010-1568-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/28/2010] [Indexed: 10/19/2022]
Abstract
The polymorphisms of endothelial nitric oxide synthase (eNOS) are associated with reduced eNOS activity. Aerobic exercise training (AEX) may influence resting nitric oxide (NO) production, oxidative stress and blood pressure. The purpose of this study was to investigate the effect of AEX on the relationship among blood pressure, eNOS gene polymorphism and oxidative stress in pre-hypertensive older people. 118 pre-hypertensive subjects (59 ± 6 years) had blood samples collected after a 12 h overnight fast for assessing plasma NO metabolites (NOx) assays, thiobarbituric acid reactive substances (T-BARS) and superoxide dismutase activity (ecSOD). eNOS polymorphism (T-786C and G-894T) was done by standard PCR methods. All people were divided according to the genotype results (G1: TT/GG, G2: TT/GT + TT, G3: TC + CC/GG, G4: TC + CC/GT + TT). All parameters were measured before and after 6 months of AEX (70% of VO(2 max)). At baseline, no difference was found in systolic and diastolic blood pressure, ecSOD and T-BARS activity. Plasma NOx levels were significantly different between G1 (19 ± 1 μM) and G4 (14.2 ± 0.6 μM) and between G2 (20.1 ± 1.7 μM) and G4 (14.2 ± 0.6 μM). Therefore, reduced NOx concentration in G4 group occurred only when the polymorphisms were associated, suggesting that these results are more related to genetic factors than NO-scavenging effect. After AEX, the G4 increased NOx values (17.2 ± 1.2 μM) and decreased blood pressure. G1, G3 and G4 decreased T-BARS levels. These results suggest the AEX can modulate the NOx concentration, eNOS activity and the relationship among eNOS gene polymorphism, oxidative stress and blood pressure especially in C (T-786C) and T (G-894T) allele carriers.
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Affiliation(s)
- Anderson Saranz Zago
- School of Physical Education and Sport of Ribeirão Preto, University of São Paulo, Av. Bandeirantes, 3900-Monte Alegre, Ribeirão Preto, São Paulo, 14040-900, Brazil.
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Sandrim VC, Palei ACT, Metzger IF, Cavalli RC, Duarte G, Tanus-Santos JE. Interethnic differences in ADMA concentrations and negative association with nitric oxide formation in preeclampsia. Clin Chim Acta 2010; 411:1457-60. [PMID: 20570587 DOI: 10.1016/j.cca.2010.05.039] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2010] [Revised: 05/27/2010] [Accepted: 05/27/2010] [Indexed: 11/30/2022]
Abstract
BACKGROUND Recent studies have suggested that impaired nitric oxide (NO) formation in preeclampsia may result from increased concentrations of an endogenous NO synthase inhibitor, the asymmetric dimethylarginine (ADMA). However, no previous study has examined whether a negative association exists between ADMA and nitrite concentrations in preeclampsia. Moreover, no previous study has compared ADMA and nitrite levels in black and white preeclamptic pregnant women. METHODS We measured plasma nitrite concentrations using an ozone-based chemiluminescence assay, and plasma ADMA levels using enzyme immunoassays in 94 pregnant (47 healthy pregnant: 16 blacks and 31 whites; and 47 preeclamptic: 14 blacks and 33 whites). RESULTS We found higher ADMA (2.199 + or -0.016 micromol/l vs. 2.112 + or - 0.012 micromol/l; P<0.0001) and lower plasma nitrite levels (102 + or - 7.1 nmol/l vs. 214.8 + or - 26.1 nmol/l; P<0.0001) in preeclamptic compared with healthy pregnant women. Black pregnant had higher ADMA levels than white pregnant women (P<0.05), both in preeclamptic (2.239 + or - 0.020 micromol/l vs. 2.144 + or - 0.019 micromol/l) and in healthy pregnant (2.172 + or - 0.025 micromol/l vs. 2.077 + or - 0.018 micromol/l). Conversely, we found no significant effects of ethnicity on the plasma nitrite levels, both in healthy pregnant and in preeclamptic women (P>0.05). We found a significant negative correlation (P<0.05) between these markers (r=-0.28; P<0.05). CONCLUSIONS Our findings show higher ADMA and lower nitrite levels in preeclamptic compared with healthy pregnant, and the concentrations of these biomarkers are inversely associated. While ethnicity affected ADMA concentrations, no such effect was found with respect to nitrite levels. These results may have important implications for studies on NO biology and therapeutic approaches of preeclampsia.
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Affiliation(s)
- Valeria C Sandrim
- Núcleo de Pós-Graduação e Pesquisa-Santa Casa de Belo Horizonte, Av. Francisco Sales 1111, Belo Horizonte, MG, Brazil
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Dreissigacker U, Wendt M, Wittke T, Tsikas D, Maassen N. Positive correlation between plasma nitrite and performance during high-intensive exercise but not oxidative stress in healthy men. Nitric Oxide 2010; 23:128-35. [PMID: 20451646 DOI: 10.1016/j.niox.2010.05.003] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2010] [Revised: 04/20/2010] [Accepted: 05/02/2010] [Indexed: 11/16/2022]
Abstract
Several studies suggest that exercise is associated with elevated oxidative stress which diminishes NO bioavailability. The aim of the present study was to investigate a potential link between NO synthesis and bioavailability and oxidative stress in the circulation of subjects performing high-intensive endurance exercise. Twenty-two male healthy subjects cycled at 80% of their maximal workload. Cubital venous blood was taken before, during and after exercise, and heparinized plasma was generated. Plasma concentrations of nitrite and nitrate were quantified by GC-MS and of the oxidative stress biomarker 15(S)-8-iso-PGF(2alpha) by GC-MS/MS. pH and pCO(2) fell and HbO(2) increased upon exercise. The duration of the 80% phase (d80) was 740+/-210s. Subjects cycled at 89.2+/-3.3% of their peak oxygen uptake. Plasma concentration of nitrite (P<0.01) and 15(S)-8-iso-PGF(2alpha) (P<0.05) decreased significantly during exercise. At the end of exercise, plasma nitrite concentration correlated positively with d80 and performed work (w80) (each P<0.05). Changes in nitrate concentration also correlated positively with d80 (P<0.05) and w80/kg (P<0.01). These findings provide evidence of a favorable effect of nitrite on high-intensive endurance exercise. The lack of association between 15(S)-8-iso-PGF(2alpha) and NO bioavailability (nitrite concentration) and NO biosynthesis (nitrate concentration) suggest that oxidative stress, notably lipid peroxidation, is not linked to the l-arginine/NO pathway in healthy male subjects being on endurance exercise.
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Affiliation(s)
- Ulrike Dreissigacker
- Institute of Sport Medicine, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
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Lacchini R, Silva PS, Tanus-Santos JE. A pharmacogenetics-based approach to reduce cardiovascular mortality with the prophylactic use of statins. Basic Clin Pharmacol Toxicol 2010; 106:357-61. [PMID: 20210789 DOI: 10.1111/j.1742-7843.2010.00551.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Nitric oxide (NO) is the main endothelial-derived relaxation factor and plays a major role in cardiovascular homeostasis. This key signalling molecule is synthesised by a family of nitric oxide synthases (NOS), and the endothelial isoform (eNOS) is the most important for nitric oxide formation in the cardiovascular system. Cardiovascular drugs including statins increase eNOS expression and up-regulate NO formation, and this effect may be responsible for protective, pleiotropic effects produced by statins. However, the genetic background may also affect NO formation in the cardiovascular system, and recent studies have shown that genetic polymorphisms in the eNOS gene modify endogenous NO formation and the risk of developing cardiovascular diseases. For example, cases with the CC genotype for the T(-786)C polymorphism in the eNOS gene are at increased cardiovascular risk when compared with those with the TT genotype. Interestingly, pharmacogenetic studies have recently indicated that atorvastatin improves NO formation more clearly in these individuals. However, it is not known whether this polymorphism really increases cardiovascular morbidity and mortality, and whether atorvastatin or other statins attenuate the morbidity and mortality rates in cases with the CC genotype. If proved true, then statins-induced up-regulation of eNOS and increased NO formation could compensate for a genetic 'disadvantage' in cases with the CC genotype. This could be a significant advance in the prevention of cardiovascular events. It is necessary although to validate this hypothesis with clinical trials which will require a long follow-up to assess relevant clinical events and not only surrogate biomarkers.
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Affiliation(s)
- Riccardo Lacchini
- Department of Pharmacology, Faculty of Medical Sciences, University of Campinas, Campinas, SP, Brazil
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Olsen DB, Scheede-Bergdahl C, Reving D, Boushel R, Dela F. The effect of rowing on endothelial function and insulin action in healthy controls and in patients with type 2 diabetes. Scand J Med Sci Sports 2010; 21:420-30. [DOI: 10.1111/j.1600-0838.2009.01012.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Exercise and possible molecular mechanisms of protection from vascular disease and diabetes: the central role of ROS and nitric oxide. Clin Sci (Lond) 2009; 118:341-9. [PMID: 19922417 DOI: 10.1042/cs20090433] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
It is now widely accepted that hypertension and endothelial dysfunction are associated with an insulin-resistant state and thus with the development of T2DM (Type 2 diabetes mellitus). Insulin signalling is impaired in target cells and tissues, indicating that common molecular signals are involved. The free radical NO* regulates cell metabolism, insulin signalling and secretion, vascular tone, neurotransmission and immune system function. NO* synthesis is essential for vasodilation, the maintenance of blood pressure and glucose uptake and, thus, if levels of NO* are decreased, insulin resistance and hypertension will result. Decreased blood levels of insulin, increased AngII (angiotensin II), hyperhomocysteinaemia, increased ADMA (asymmetric omega-NG,NG-dimethylarginine) and low plasma L-arginine are all conditions likely to decrease NO* production and which are associated with diabetes and cardiovascular disease. We suggest in the present article that the widely reported beneficial effects of exercise in the improvement of metabolic and cardiovascular health are mediated by enhancing the flux of muscle- and kidney-derived amino acids to pancreatic and vascular endothelial cells aiding the intracellular production of NO*, therefore resulting in normalization of insulin secretion, vascular tone and insulin sensitivity. Exercise may also have an impact on AngII and ADMA signalling and the production of pro- and anti-inflammatory cytokines in muscle, so reducing the progression and development of vascular disease and diabetes. NO* synthesis will be increased during exercise in the vascular endothelial cells so promoting blood flow. We suggest that exercise may promote improvements in health due to positive metabolic and cytokine-mediated effects.
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Brinkley TE, Fenty-Stewart NM, Park JY, Brown MD, Hagberg JM. Plasma nitrate/nitrite levels are unchanged after long-term aerobic exercise training in older adults. Nitric Oxide 2009; 21:234-8. [PMID: 19825427 DOI: 10.1016/j.niox.2009.10.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2009] [Revised: 10/01/2009] [Accepted: 10/07/2009] [Indexed: 12/12/2022]
Abstract
Reduced nitric oxide (NO) production and bioactivity is a major contributor to endothelial dysfunction. Animal data suggest that improvements in endothelial function in response to aerobic exercise training may depend on the duration of the training program. However, no studies have examined changes in NO (as assessed by the major NO metabolites, nitrate and nitrite, NO(x)) after long-term training in humans. In addition, aging may impair the ability of the vasculature to increase NO with exercise. Thus, we determined whether 24 weeks of aerobic exercise training increases plasma NO(x) levels in sedentary older adults. We also examined changes in forearm blood flow (FBF) at rest and during reactive hyperemia as a measure of vasomotor function. Plasma NO(x) levels were measured in 82 men and women using a modified Griess assay. FBF was assessed in a subset of individuals (n = 15) using venous occlusion plethysmography. After 24 weeks of exercise training, there were significant improvements in maximum oxygen consumption, HDL cholesterol, triglycerides, and body fat. Changes in plasma NO(x) levels ranged from -14.83 to +16.69 micromol/L; however, the mean change overall was not significant (-0.33 + or - 6.30 micromol/L, p = 0.64). Changes in plasma NO(x) levels were not associated with age, gender, race, HDL cholesterol, triglycerides, body weight, body fat, or maximal oxygen consumption. There were also no significant changes in basal FBF, peak FBF, hyperemic response, total hyperemic flow, or minimum forearm vascular resistance with exercise training. In conclusion, improvements in plasma NO(x) levels and FBF are not evident after long-term training in older adults.
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Affiliation(s)
- Tina E Brinkley
- Sticht Center on Aging, Department of Internal Medicine, Section on Gerontology and Geriatric Medicine, Wake Forest University School of Medicine, Winston-Salem, NC 27157, USA.
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