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Berger MM, Amrein K, Barazzoni R, Bindels L, Bretón I, Calder PC, Cappa S, Cuerda C, D'Amelio P, de Man A, Delzenne NM, Forbes A, Genton L, Gombart AF, Joly F, Laviano A, Matthys C, Phyo PP, Ravasco P, Serlie MJ, Shenkin A, Stoffel NU, Talwar D, van Zanten ARH. The science of micronutrients in clinical practice - Report on the ESPEN symposium. Clin Nutr 2024; 43:268-283. [PMID: 38104489 DOI: 10.1016/j.clnu.2023.12.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Revised: 11/27/2023] [Accepted: 12/07/2023] [Indexed: 12/19/2023]
Abstract
BACKGROUND & AIMS The European Society for Clinical Nutrition and Metabolism published its first clinical guidelines for use of micronutrients (MNs) in 2022. A two-day web symposium was organized in November 2022 discussing how to apply the guidelines in clinical practice. The present paper reports the main findings of this symposium. METHODS Current evidence was discussed, the first day being devoted to clarifying the biology underlying the guidelines, especially regarding the definition of deficiency, the impact of inflammation, and the roles in antioxidant defences and immunity. The second day focused on clinical situations with high prevalence of MN depletion and deficiency. RESULTS The importance of the determination of MN status in patients at risk and diagnosis of deficiencies is still insufficiently perceived, considering the essential role of MNs in immune and antioxidant defences. Epidemiological data show that deficiencies of several MNs (iron, iodine, vitamin D) are a global problem that affects human health and well-being including immune responses such as to vaccination. Clinical conditions frequently associated with MN deficiencies were discussed including cancer, obesity with impact of bariatric surgery, diseases of the gastrointestinal tract, critical illness, and aging. In all these conditions, MN deficiency is associated with worsening of outcomes. The recurrent problem of shortage of MN products, but also lack of individual MN-products is a worldwide problem. CONCLUSION Despite important progress in epidemiology and clinical nutrition, numerous gaps in practice persist. MN depletion and deficiency are frequently insufficiently searched for in clinical conditions, leading to inadequate treatment. The symposium concluded that more research and continued education are required to improve patient outcome.
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Affiliation(s)
- Mette M Berger
- Lausanne University, Faculty of Biology & Medicine, 1005 Lausanne, Switzerland.
| | - Karin Amrein
- Division of Endocrinology and Diabetology, Department of Internal Medicine, Medical University of Graz, 8036 Graz, Austria.
| | - Rocco Barazzoni
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy.
| | - Laure Bindels
- Faculty of Pharmacy and Biomedical Sciences, Louvain Drug Research Institute, Université Catholique de Louvain, Brussels, Belgium.
| | - Irene Bretón
- Nutrition Unit, Hospital General Universitario Gregorio Marañón, Madrid, Spain.
| | - Philip C Calder
- School of Human Development and Health, Faculty of Medicine, University of Southampton and NIHR Southampton Biomedical Research Centre, University Hospital Southampton NHS Foundation Trust, Southampton SO16 6YD, UK.
| | - Stefano Cappa
- IUSS Cognitive Neuroscience (ICoN) Center, University School for Advanced Studies (IUSS-Pavia), 27100 Pavia, Italy.
| | - Cristina Cuerda
- Departamento de Medicina, Universidad Complutense de Madrid, Nutrition Unit, Hospital General Universitario Gregorio Marañón, Madrid, Spain.
| | - Patrizia D'Amelio
- Service de gériatrie et réadaptation gériatrique, Département de Médecine, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland.
| | - Angélique de Man
- Department of Intensive Care Medicine, Research VUMC Intensive Care, Amsterdam Cardiovascular Science, Amsterdam Infection and Immunity Institute, Amsterdam, the Netherlands.
| | - Nathalie M Delzenne
- Metabolism and Nutrition Research Group, Louvain Drug Research Institute, Université Catholique de Louvain, Brussels, Belgium.
| | - Alastair Forbes
- Institute of Clinical Medicine, University of Tartu, Tartu, Estonia.
| | - Laurence Genton
- Clinical Nutrition Unit, Department of Endocrinology, Geneva University Hospitals, Geneva, Switzerland.
| | - Adrian F Gombart
- Linus Pauling Institute, Department of Biochemistry and Biophysics, Oregon State University, Corvallis, OR 97331, USA.
| | - Francisca Joly
- Beaujon Hospital, APHP, Clichy, University of Paris VII, France.
| | - Alessandro Laviano
- Department of Translational and Precision Medicine, University La Sapienza, Rome, Italy.
| | | | - Pyi Pyi Phyo
- WHO European Office for the Prevention and Control of Noncommunicable Diseases, WHO Regional Office for Europe, Copenhagen, Denmark.
| | - Paula Ravasco
- Coordinator of the Curricular Units Diabetes, Obesity and Lifestyle, Digestion and Defence, University of Lisbon - Católica Medical School, Lisbon, Portugal.
| | - Mireille J Serlie
- Department of Endocrinology and Metabolism, Amsterdam University Medical Centers, Amsterdam, the Netherlands.
| | - Alan Shenkin
- Institute of Aging and Chronic Disease, University of Liverpool, Liverpool, UK.
| | - Nicole U Stoffel
- Laboratory of Human Nutrition, Department of Health Sciences and Technology, ETH Zurich, Switzerland; MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, Oxford, UK.
| | - Dinesh Talwar
- Department of Biochemistry, Glasgow Royal Infirmary, Glasgow, UK.
| | - Arthur R H van Zanten
- Gelderse Vallei Hospital, Ede and Division of Human Nutrition and Health, Wageningen University & Research, Wageningen, the Netherlands.
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Divković A, Karasalihović Z, Rumora Samarin I, Sabitović D, Radić K, Golub N, Vujić L, Rajković MG, Vitali Čepo D. Effect of Alpha Lipoic Acid Supplementation on Oxidative Stress and Lipid Parameters in Women Diagnosed with Low-Grade Squamous Intraepithelial Lesions (LSILs): A Double-Blind, Randomized, Placebo-Controlled Trial. Antioxidants (Basel) 2023; 12:1670. [PMID: 37759972 PMCID: PMC10525309 DOI: 10.3390/antiox12091670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 08/16/2023] [Accepted: 08/22/2023] [Indexed: 09/29/2023] Open
Abstract
Limited scientific evidence shows that alpha lipoic acid (ALA) can induce regression rates of low-grade squamous intraepithelial lesions (LSILs), but the mechanisms of these effects have not been elucidated. To gain a broader insight into its therapeutic potential and mechanisms of action, the effects of 3 months of supplementation with 600 mg of ALA on antioxidant and lipid status parameters in 100 patients with LSILs were investigated in a randomized, placebo-controlled study. The obtained results are discussed in terms of patients' initial metabolic status and diet quality (particularly nutritional intake of antioxidants). The obtained results showed that oxidative status biomarkers were not significantly affected by ALA supplementation. However, serum superoxide dismutase (SOD) activity was positively affected in the subgroup of patients with higher dietary antioxidant intake. Surprisingly, ALA supplementation resulted in a small but statistically significant increase in serum low density lipoprotein (LDL), and the observed effect was significantly affected by the initial lipid status of the participants. Larger studies are necessary to gain additional insights on the clinical significance of ALA as an antioxidant and hypolipemic agent and to optimize its potential application in LSIL treatment.
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Affiliation(s)
- Anja Divković
- University Clinical Centre Tuzla, 75000 Tuzla, Bosnia and Herzegovina; (A.D.); (Z.K.)
| | - Zinaida Karasalihović
- University Clinical Centre Tuzla, 75000 Tuzla, Bosnia and Herzegovina; (A.D.); (Z.K.)
| | - Ivana Rumora Samarin
- University of Zagreb, Faculty of Food Technology and Biotechnology, 10000 Zagreb, Croatia;
| | - Damir Sabitović
- University Clinical Centre Tuzla, 75000 Tuzla, Bosnia and Herzegovina; (A.D.); (Z.K.)
| | - Kristina Radić
- University of Zagreb, Faculty of Pharmacy and Biochemistry, 10000 Zagreb, Croatia; (K.R.); (N.G.); (L.V.); (M.G.R.)
| | - Nikolina Golub
- University of Zagreb, Faculty of Pharmacy and Biochemistry, 10000 Zagreb, Croatia; (K.R.); (N.G.); (L.V.); (M.G.R.)
| | - Lovorka Vujić
- University of Zagreb, Faculty of Pharmacy and Biochemistry, 10000 Zagreb, Croatia; (K.R.); (N.G.); (L.V.); (M.G.R.)
| | - Marija Grdić Rajković
- University of Zagreb, Faculty of Pharmacy and Biochemistry, 10000 Zagreb, Croatia; (K.R.); (N.G.); (L.V.); (M.G.R.)
| | - Dubravka Vitali Čepo
- University of Zagreb, Faculty of Pharmacy and Biochemistry, 10000 Zagreb, Croatia; (K.R.); (N.G.); (L.V.); (M.G.R.)
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Porto AA, Gonzaga LA, Benjamim CJR, Valenti VE. Absence of Effects of L-Arginine and L-Citrulline on Inflammatory Biomarkers and Oxidative Stress in Response to Physical Exercise: A Systematic Review with Meta-Analysis. Nutrients 2023; 15:nu15081995. [PMID: 37111214 DOI: 10.3390/nu15081995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 02/22/2023] [Accepted: 02/28/2023] [Indexed: 04/29/2023] Open
Abstract
BACKGROUND The repercussions on oxidative and inflammatory stress markers under the effects of arginine and citrulline in response to exercise are not fully reached. We completed a systematic review to investigate the effects of L-Citrulline or L-Arginine on oxidative stress and inflammatory biomarkers following exercise. EMBASE, MEDLINE (PubMed), Cochrane Library, CINAHL, LILACS, and Web of Science databases were used to record the trials. This study includes randomized controlled trials (RCTs) and non-RCTs with subjects over 18 years old. Those under the intervention protocol consumed L-Citrulline or L-Arginine, and the controls ingested placebo. We recognized 1080 studies, but only 7 were included (7 studies in meta-analysis). We observed no difference between pre- vs. post-exercise for oxidative stress (subtotal = -0.21 [CI: -0.56, 0.14], p = 0.24, and heterogeneity = 0%. In the sub-group "L-Arginine" we found a subtotal = -0.29 [-0.71, 0.12], p = 0.16, and heterogeneity = 0%. For the "L-Citrulline" subgroup we observed a subtotal = 0.00 [-0.67, 0.67], p = 1.00, and heterogeneity was not applicable. No differences were observed between groups (p = 0.47), and I² = 0%) or in antioxidant activity (subtotal = -0.28 [-1.65, 1.08], p = 0.68, and heterogeneity = 0%). In the "L-Arginine" sub-group, we found a subtotal = -3.90 [-14.18, 6.38], p = 0.46, and heterogeneity was not applicable. For the "L-Citrulline" subgroup, we reported a subtotal = -0.22 [-1.60, 1.16], p = 0.75, and heterogeneity was not applicable. No differences were observed between groups (p = 0.49), and I² = 0%), inflammatory markers (subtotal = 8.38 [-0.02, 16.78], p = 0.05, and heterogeneity = 93%. Tests for subgroup differences were not applicable, and anti-inflammatory markers (subtotal = -0.38 [-1.15, 0.39], p = 0.34 and heterogeneity = 15%; testing for subgroup differences was not applicable). In conclusion, our systematic review and meta-analysis found that L-Citrulline and L-Arginine did not influence inflammatory biomarkers and oxidative stress after exercise.
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Affiliation(s)
- Andrey A Porto
- São Paulo State University (UNESP), Presidente Prudente 19060-080, SP, Brazil
- Autonomic Nervous System Center, São Paulo State University (UNESP), Marília 17525-900, SP, Brazil
| | - Luana A Gonzaga
- São Paulo State University (UNESP), Presidente Prudente 19060-080, SP, Brazil
- Autonomic Nervous System Center, São Paulo State University (UNESP), Marília 17525-900, SP, Brazil
| | - Cicero Jonas R Benjamim
- Department of Internal Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto 14049-900, SP, Brazil
| | - Vitor E Valenti
- São Paulo State University (UNESP), Presidente Prudente 19060-080, SP, Brazil
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Morvaridzadeh M, Estêvão MD, Morvaridi M, Belančić A, Mohammadi S, Hassani M, Heshmati J, Ziaie S. The effect of Conjugated Linoleic Acid intake on oxidative stress parameters and antioxidant enzymes: a systematic review and meta-analysis of randomized clinical trials. Prostaglandins Other Lipid Mediat 2022; 163:106666. [PMID: 35914666 DOI: 10.1016/j.prostaglandins.2022.106666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 07/22/2022] [Accepted: 07/22/2022] [Indexed: 10/16/2022]
Abstract
Conjugated Linoleic Acid (CLA) are thought to pose beneficial effects on inflammatory responses and oxidative stress (OS). Thus, the present systematic review and meta-analysis of randomized controlled trials (RCTs) aimed to assess the net effects of CLA supplementation on various OS parameters and antioxidant enzymes. PubMed/MEDLINE, Scopus, Web of Science, and Cochrane Central Register of Controlled Trials databases were searched for publications on CLA supplementation effects on OS parameters up to March 2021. The data extracted from eligible studies were expressed as standardized mean difference with 95% confidence intervals and then combined into meta-analysis using the random-effects model. Overall, 11 RCTs (enrolling 586 participants) met the inclusion criteria and were included in meta-analysis; however, since those trials evaluated different OS parameters, meta-analysis was carried out considering different sets for each parameter separately. According to our results, CLA supplementation significantly increases 8-iso-PGF2α urinary concentration (SMD: 2; 95% CI: 0.74, 3.27; I2=87.7%). On contrary, the intervention does not seem to change 15-keto-dihydro-PGF2α urinary concentration, nor the serum levels of CAT, SOD, GPx and MDA. Taken all together, CLA supplementation does not appear to have substantial effects on OS markers in general; albeit due to relatively small sample size and high level of heterogeneity between studies, the obtained findings should be interpreted with caution. Further large well-designed RCTs, investigating the impact of CLA and including various groups of patients, are still needed.
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Affiliation(s)
- Mojgan Morvaridzadeh
- Department of Nutritional Science, School of Nutritional Science and Food Technology, Kermanshah University of Medical Sciences, Kermanshah, Iran.
| | - M Dulce Estêvão
- Universidade do Algarve, Escola Superior de Saúde, Campus de Gambelas, Faro, Portugal.
| | - Mehrnaz Morvaridi
- Deakin University, Institute for Physical Activity and Nutrition, School of Exercise and Nutrition Science, Geelong, VIC 3220.
| | - Andrej Belančić
- Department of Clinical Pharmacology, Clinical Hospital Centre Rijeka, Rijeka, Croatia.
| | - Shooka Mohammadi
- eDepartment of Social and Preventive Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.
| | - Motahareh Hassani
- Department of Nutrition, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Javad Heshmati
- Department of Nutritional Science, School of Nutritional Science and Food Technology, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Somaye Ziaie
- ICU Department, Emam Reza Hospital, Kermanshah University of Medical Sciences, Kermanshah, Iran.
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Astaxanthin Supplementation Increases Glutathione Concentrations but Does Not Impact Fat Oxidation During Exercise in Active Young Men. Int J Sport Nutr Exerc Metab 2021; 32:8-15. [PMID: 34611051 DOI: 10.1123/ijsnem.2021-0138] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 08/20/2021] [Accepted: 08/21/2021] [Indexed: 11/18/2022]
Abstract
This study investigated the effects of 6 mg/day of astaxanthin supplementation on markers of oxidative stress and substrate metabolism during a graded exercise test in active young men. A double-blind, randomized, counterbalanced, cross-over design was used. Fourteen men (age = 23 ± 2 years) supplemented with 6 mg/day of astaxanthin and a placebo for 4 weeks, with a 1 week washout period between treatments. Following each supplementation period, a fasting blood sample was obtained to measure markers of oxidative stress: glutathione, hydrogen peroxide, advanced oxidation protein products, and malondialdehyde. Participants also completed a graded exercise test after each treatment to determine substrate utilization during exercise at increasing levels of intensity. Glutathione was ∼7% higher following astaxanthin compared with placebo (1,233 ± 133 vs. 1,156 ± 185 μM, respectively; p = .02, d = 0.48). Plasma hydrogen peroxide and malondialdehyde were not different between treatments (p > .05). Although not statistically significant (p = .45), advanced oxidation protein products were reduced by ∼28%. During the graded exercise test, mean fat oxidation rates were not different between treatments (p > .05); however, fat oxidation decreased from 50 to 120 W (p < .001) and from 85 to 120 W (p = .004) in both conditions. Astaxanthin supplementation of 6 mg/day for 4 weeks increased whole blood levels of the antioxidant glutathione in active young men but did not affect oxidative stress markers or substrate utilization during exercise. Astaxanthin appears to be an effective agent to increase endogenous antioxidant status.
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Devrim-Lanpir A, Bilgic P, Kocahan T, Deliceoğlu G, Rosemann T, Knechtle B. Total Dietary Antioxidant Intake Including Polyphenol Content: Is it Capable to Fight against Increased Oxidants within the Body of Ultra-Endurance Athletes? Nutrients 2020; 12:nu12061877. [PMID: 32586010 PMCID: PMC7353279 DOI: 10.3390/nu12061877] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 06/18/2020] [Accepted: 06/19/2020] [Indexed: 02/07/2023] Open
Abstract
The role of dietary antioxidants on exhaustive exercise-induced oxidative stress has been well investigated. However, the contribution of total dietary antioxidant capacity on exogenous antioxidant defense and exercise performance has commonly been disregarded. The aims of the present investigation were to examine (i) the effects of dietary total antioxidant intake on body antioxidant mechanisms, and (ii) an exhaustive exercise-induced oxidative damage in ultra-endurance athletes. The study included 24 ultra-marathon runners and long-distance triathletes (12 male and 12 female) who underwent an acute exhaustive exercise test (a cycle ergometer (45 min at 65% VO2max) immediately followed by a treadmill test (75% VO2max to exhaustion). Oxidative stress-related biomarkers (8-isoprostaglandin F2alpha (8-iso PGF2a), total oxidant status (TOS, total antioxidant status (TAS)) in plasma were collected before and after exercise. Oxidative stress index was calculated to assess the aspect of redox balance. Blood lactate concentrations and heart rate were measured at the 3rd and 6th min after exercise. Dietary antioxidant intake was calculated using the ferric reducing ability of plasma (FRAP) assay. Dietary total antioxidant intake of the subjects was negatively correlated with pre-exercise TOS concentrations (rs = -0.641 in male, and rs = -0.741 in females) and post- vs. pre- (∆) 8-iso PGF2a levels (rs = -0.702 in male; p = 0.016, and rs = -0.682 in females; p = 0.024), and positively correlated with ∆ TAS concentrations (rs = 0.893 in males; p = 0.001, and rs = 0.769 in females; p = 0.002) and post- exercise lactate concentrations (rs = 0.795 for males; p = 0.006, and rs = 0.642 for females; p = 0.024). A positive meaningful (p = 0.013) interaction was observed between time at exhaustion and dietary antioxidant intake (rs = 0.692) in males, but not in females. In conclusion, the determination of total dietary antioxidant intake in ultra-endurance athletes may be crucial for gaining a better perspective on body antioxidant defense against exhaustive exercise-induced oxidative stress. However, the effects of dietary antioxidant on exercise performance and recovery rate needs further investigation.
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Affiliation(s)
- Aslı Devrim-Lanpir
- Department of Nutrition and Dietetics, Faculty of Health Sciences, Istanbul Medeniyet University, 34862 Istanbul, Turkey;
| | - Pelin Bilgic
- Department of Nutrition and Dietetics, Faculty of Health Sciences, Hacettepe University, 06100 Ankara, Turkey;
| | - Tuğba Kocahan
- Sport Medicine Physician, Department of Health Services, Sports General Directorship, The Ministry of Youth and Sports, Center of Athlete Training and Health Research, 06100 Ankara, Turkey;
| | - Gökhan Deliceoğlu
- Sport Scientist, Faculty of Sports Science, Kırıkkale University, 71450 Kırıkkale, Turkey;
| | - Thomas Rosemann
- Institute of Primary Care, University of Zurich, 8091 Zurich, Switzerland;
| | - Beat Knechtle
- Institute of Primary Care, University of Zurich, 8091 Zurich, Switzerland;
- Correspondence: ; Tel.: +41-(0)-71-226-93-00
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MitoQ and CoQ10 supplementation mildly suppresses skeletal muscle mitochondrial hydrogen peroxide levels without impacting mitochondrial function in middle-aged men. Eur J Appl Physiol 2020; 120:1657-1669. [DOI: 10.1007/s00421-020-04396-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Accepted: 05/16/2020] [Indexed: 12/14/2022]
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Spirulina platensis prevents oxidative stress and inflammation promoted by strength training in rats: dose-response relation study. Sci Rep 2020; 10:6382. [PMID: 32286405 PMCID: PMC7156748 DOI: 10.1038/s41598-020-63272-5] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Accepted: 03/16/2020] [Indexed: 01/10/2023] Open
Abstract
The purpose of this study was to evaluate the effects of Spirulina Platensis supplementation on selected blood markers of oxidative stress, muscle damage, inflammation, and performance in trained rats. Rats (250 g - 300 g) were submitted to a strength training program (eight weeks), divided into four groups: control (GT) (trained without supplementation), trained with daily-supplementation of 50 mg/kg (GT50), 150 mg/kg (GT150) and 500 mg/kg (GT500). Training consisted of a jump protocol in PVC-cylinder containing water, with increasing load over experimental weeks. We evaluated the markers of oxidative stress (malondialdehyde - MDA and antioxidant capacity) and inflammation (C-reactive protein) at the end of the training. Among groups submitted to strength training, concentration of C-reactive protein decreased after 8 weeks of intervention in the trained group and GT500. Strength training enhanced plasma MDA concentration of malondialdehyde with supplementation of S. platensis in GT150 and GT500. In plasma analysis, strength training enhanced the percentage of oxidation inhibition, with spirulina supplementation in rates of 150 and 500 mg/kg. Spirulina supplementation for 8 weeks (in a dose-effect manner) improved antioxidant capacity as well as attenuated exercise-induced increases in ROS and inflammation. As a practical application, the use as high doses did not cause a reduction in positive physiological adaptations to exercise training. Additional studies are necessary to test the application of Spirulina Platensis in other contexts, as collective sports (basketball, football, soccer).
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Léveillé M, Estall JL. Mitochondrial Dysfunction in the Transition from NASH to HCC. Metabolites 2019; 9:E233. [PMID: 31623280 PMCID: PMC6836234 DOI: 10.3390/metabo9100233] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 09/26/2019] [Accepted: 10/11/2019] [Indexed: 02/06/2023] Open
Abstract
The liver constantly adapts to meet energy requirements of the whole body. Despite its remarkable adaptative capacity, prolonged exposure of liver cells to harmful environmental cues (such as diets rich in fat, sugar, and cholesterol) results in the development of chronic liver diseases (including non-alcoholic fatty liver disease (NAFLD) and non-alcoholic steatohepatitis (NASH)) that can progress to hepatocellular carcinoma (HCC). The pathogenesis of these diseases is extremely complex, multifactorial, and poorly understood. Emerging evidence suggests that mitochondrial dysfunction or maladaptation contributes to detrimental effects on hepatocyte bioenergetics, reactive oxygen species (ROS) homeostasis, endoplasmic reticulum (ER) stress, inflammation, and cell death leading to NASH and HCC. The present review highlights the potential contribution of altered mitochondria function to NASH-related HCC and discusses how agents targeting this organelle could provide interesting treatment strategies for these diseases.
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Affiliation(s)
- Mélissa Léveillé
- Institut de Recherches Cliniques de Montréal (IRCM), Montreal, Quebec, QC H2W 1R7, Canada.
- Faculty of Medicine, University of Montreal, Montreal, Quebec, QC H3G 2M1, Canada.
| | - Jennifer L Estall
- Institut de Recherches Cliniques de Montréal (IRCM), Montreal, Quebec, QC H2W 1R7, Canada.
- Faculty of Medicine, University of Montreal, Montreal, Quebec, QC H3G 2M1, Canada.
- Division of Experimental Medicine, McGill University, Montreal, Quebec, QC H4A 3J1, Canada.
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AbuMweis SS, Alatrash RM, Tayyem R, Hammoudeh A. Sex and age are associated with the use of specific dietary supplements among people exercising in gyms: Cross-sectional analysis from Amman, Jordan. MEDITERRANEAN JOURNAL OF NUTRITION AND METABOLISM 2019. [DOI: 10.3233/mnm-180223] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Suhad S. AbuMweis
- Department of Clinical Nutrition and Dietetics, The Hashemite University, Zarqa, Jordan
| | - Razan M. Alatrash
- Department of Clinical Nutrition, Specialized Nutritionist, Jordan University Hospital, Amman, Jordan
| | - Reema Tayyem
- Department of Nutrition and Food Technology, Faculty of Agriculture, The University of Jordan, Amman, Jordan
| | - Ayman Hammoudeh
- Department of Cardiology, Interventiona cardiologist, Istishari Hospital, Amman, Jordan
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Guest NS, Horne J, Vanderhout SM, El-Sohemy A. Sport Nutrigenomics: Personalized Nutrition for Athletic Performance. Front Nutr 2019; 6:8. [PMID: 30838211 PMCID: PMC6389634 DOI: 10.3389/fnut.2019.00008] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 01/18/2019] [Indexed: 12/14/2022] Open
Abstract
An individual's dietary and supplement strategies can influence markedly their physical performance. Personalized nutrition in athletic populations aims to optimize health, body composition, and exercise performance by targeting dietary recommendations to an individual's genetic profile. Sport dietitians and nutritionists have long been adept at placing additional scrutiny on the one-size-fits-all general population dietary guidelines to accommodate various sporting populations. However, generic "one-size-fits-all" recommendations still remain. Genetic differences are known to impact absorption, metabolism, uptake, utilization and excretion of nutrients and food bioactives, which ultimately affects a number of metabolic pathways. Nutrigenomics and nutrigenetics are experimental approaches that use genomic information and genetic testing technologies to examine the role of individual genetic differences in modifying an athlete's response to nutrients and other food components. Although there have been few randomized, controlled trials examining the effects of genetic variation on performance in response to an ergogenic aid, there is a growing foundation of research linking gene-diet interactions on biomarkers of nutritional status, which impact exercise and sport performance. This foundation forms the basis from which the field of sport nutrigenomics continues to develop. We review the science of genetic modifiers of various dietary factors that impact an athlete's nutritional status, body composition and, ultimately athletic performance.
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Affiliation(s)
- Nanci S Guest
- Department of Nutritional Sciences, University of Toronto, Toronto, ON, Canada.,Nutrigenomix Inc., Toronto, ON, Canada
| | - Justine Horne
- Department of Health and Rehabilitation Sciences, University of Western Ontario, London, ON, Canada
| | - Shelley M Vanderhout
- Department of Nutritional Sciences, University of Toronto, Toronto, ON, Canada.,Nutrigenomix Inc., Toronto, ON, Canada
| | - Ahmed El-Sohemy
- Department of Nutritional Sciences, University of Toronto, Toronto, ON, Canada.,Nutrigenomix Inc., Toronto, ON, Canada
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Peluso I, Reggi R, Yarla NS, Longhitano Y, Palmery M. Relationship between the peroxidation of leukocytes index ratio and a functional mathematical index including uric acid levels and health-related habits: a pilot study. Eat Weight Disord 2018; 23:893-896. [PMID: 28914432 DOI: 10.1007/s40519-017-0441-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2017] [Accepted: 09/07/2017] [Indexed: 01/10/2023] Open
Affiliation(s)
- Ilaria Peluso
- Research Centre for Food and Nutrition, Council for Agricultural Research and Economics (CREA-AN), Via Ardeatina 546, 00178, Rome, Italy
| | - Raffaella Reggi
- Department of Physiology and Pharmacology "V. Erspamer", "Sapienza" University of Rome, P.le Aldo Moro 5, 00185, Rome, Italy
| | | | - Yaroslava Longhitano
- Department of Physiology and Pharmacology "V. Erspamer", "Sapienza" University of Rome, P.le Aldo Moro 5, 00185, Rome, Italy
| | - Maura Palmery
- Department of Physiology and Pharmacology "V. Erspamer", "Sapienza" University of Rome, P.le Aldo Moro 5, 00185, Rome, Italy.
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Abstract
BACKGROUND Polyphenols exert physiological effects that may impact athletic performance. Polyphenols are antioxidants that have been noted to hinder training adaptations, yet conversely they stimulate stress-related cell signalling pathways that trigger mitochondrial biogenesis and influence vascular function. OBJECTIVE To determine the overall effect of polyphenols on human athletic performance. METHODS A search strategy was completed using MEDLINE, EMBASE, CINAHL, AMED and SPORTDiscus in April 2016. The studies were screened and independently reviewed by two researchers against predetermined criteria for eligibility. As a result of this screening, 14 studies were included for meta-analysis. Of these, the studied populations were predominately-trained males with an average intervention dose of 688 ± 478 mg·day-1. RESULTS The pooled results demonstrate polyphenol supplementation for at least 7 days increases performance by 1.90% (95% CI 0.40-3.39). Sub-analysis of seven studies using quercetin identified a performance increase of 2.82% (95% CI 2.05-3.58). There were no adverse effects reported in the studies in relation to the intervention. CONCLUSION Overall the pooled results show that polyphenols, and of note quercetin, are viable supplements to improve performance in healthy individuals.
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Pickering C, Kiely J. Understanding Personalized Training Responses: Can Genetic Assessment Help? ACTA ACUST UNITED AC 2017. [DOI: 10.2174/1875399x01710010191] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:Traditional exercise prescription is based on the assumption that exercise adaptation is predictable and standardised across individuals. However, evidence has emerged in the past two decades demonstrating that large inter-individual variation exists regarding the magnitude and direction of adaption following exercise.Objective:The aim of this paper was to discuss the key factors influencing this personalized response to exercise in a narrative review format.Findings:Genetic variation contributes significantly to the personalized training response, with specific polymorphisms associated with differences in exercise adaptation. These polymorphisms exist in a number of pathways controlling exercise adaptation. Environmental factors such as nutrition, psycho-emotional response, individual history and training programme design also modify the inter-individual adaptation following training. Within the emerging field of epigenetics, DNA methylation, histone modifications and non-coding RNA allow environmental and lifestyle factors to impact genetic expression. These epigenetic mechanisms are themselves modified by genetic and non-genetic factors, illustrating the complex interplay between variables in determining the adaptive response. Given that genetic factors are such a fundamental modulator of the inter-individual response to exercise, genetic testing may provide a useful and affordable addition to those looking to maximise exercise adaption, including elite athletes. However, there are ethical issues regarding the use of genetic tests, and further work is needed to provide evidence based guidelines for their use.Conclusion:There is considerable inter-individual variation in the adaptive response to exercise. Genetic assessments may provide an additional layer of information allowing personalization of training programmes to an individual’s unique biology.
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Barranco-Ruiz Y, Aragón-Vela J, Casals C, Martínez-Amat A, Casuso RA, Huertas JR. Control of antioxidant supplementation through interview is not appropriate in oxidative-stress sport studies: Analytical confirmation should be required. Nutrition 2016; 33:278-284. [PMID: 27729185 DOI: 10.1016/j.nut.2016.06.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 06/16/2016] [Accepted: 06/24/2016] [Indexed: 11/19/2022]
Abstract
OBJECTIVE Controlling antioxidant supplementation in athletes involved in studies related to oxidative stress and muscle damage is the key to ensure results. The aim of this study was to confirm through high-performance liquid chromatography (HPLC) analysis whether well-trained individuals lied during a personal interview when asked if they were taking supplements with antioxidants, and how this could affect oxidative stress, muscle damage, and antioxidant response. METHODS A total of 94 men, well trained in endurance sports, volunteered in this study. They denied taking any antioxidant supplementation at initial interview. After a HPLC analysis, abnormal α-tocopherol concentrations were detected, probably due to a hidden antioxidant supplementation. Participants were classified into two groups: no evidence of antioxidant supplementation (NS group = α-tocopherol values <80 nmol/mL; n = 75) and evidence of antioxidant supplementation (S group = α-tocopherol values >80 nmol/mL; n = 19). Lipid peroxidation, muscle damage, antioxidant enzyme activity, and nonenzymatic antioxidant content were analyzed according to this classification. Statistical comparisons were performed using Student's t test. RESULTS The α-tocopherol concentrations were significantly higher in the S group than in the NS group (MD = 725.01 ± 39.01 nmol/mL; P = 0.001). The S group showed a trend toward lower hydroperoxides than the NS group (MD = 1.19 ± 0.72 nmol/mL; P = 0.071). The S group showed significantly lower catalase activity than the NS group (MD = 0.10 ± 0.02-seg-1 mg-1; P < 0.01). Skeletal muscle damage markers did not differ between experimental groups. CONCLUSIONS Data from the present study reveal that 20% of participants lied in the exclusion criteria of antioxidant supplementation in a personal interview, as they showed high plasmatic α-tocopherol concentrations after HPLC verification. Catalase activity seems to be affected by high α-tocopherol plasma levels. Therefore, we strongly recommend the HPLC analysis as a necessary tool to verify the antioxidant intake and preserve results in studies linking oxidative stress and sport.
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Affiliation(s)
- Yaira Barranco-Ruiz
- School of Physical Culture, Faculty of Health Sciences, National University of Chimborazo, North Campus "Ms. Edison Riera" AV, Riobamba, Ecuador; Department of Physiology, Institute of Nutrition and Food Technology, Biomedical Research Centre, University of Granada, AV, Granada, Spain.
| | - Jeronimo Aragón-Vela
- Department of Physiology, Institute of Nutrition and Food Technology, Biomedical Research Centre, University of Granada, AV, Granada, Spain
| | - Cristina Casals
- Department of Physiology, Institute of Nutrition and Food Technology, Biomedical Research Centre, University of Granada, AV, Granada, Spain
| | - Antonio Martínez-Amat
- CTS026 Research Group on Physical Activity, Physiotherapy and Health, Department of Health Sciences, Faculty of Health Sciences, University of Jaén, Campus "Las Lagunillas", Jaén, Spain
| | - Rafael A Casuso
- Department of Physiology, Institute of Nutrition and Food Technology, Biomedical Research Centre, University of Granada, AV, Granada, Spain
| | - Jesus R Huertas
- Department of Physiology, Institute of Nutrition and Food Technology, Biomedical Research Centre, University of Granada, AV, Granada, Spain
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Thomas DT, Erdman KA, Burke LM. Position of the Academy of Nutrition and Dietetics, Dietitians of Canada, and the American College of Sports Medicine: Nutrition and Athletic Performance. J Acad Nutr Diet 2016; 116:501-528. [PMID: 26920240 DOI: 10.1016/j.jand.2015.12.006] [Citation(s) in RCA: 594] [Impact Index Per Article: 74.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Indexed: 12/12/2022]
Abstract
It is the position of the Academy of Nutrition and Dietetics (Academy), Dietitians of Canada (DC), and the American College of Sports Medicine (ACSM) that the performance of, and recovery from, sporting activities are enhanced by well-chosen nutrition strategies. These organizations provide guidelines for the appropriate type, amount, and timing of intake of food, fluids, and supplements to promote optimal health and performance across different scenarios of training and competitive sport. This position paper was prepared for members of the Academy, DC, and ACSM, other professional associations, government agencies, industry, and the public. It outlines the Academy's, DC's, and ACSM's stance on nutrition factors that have been determined to influence athletic performance and emerging trends in the field of sports nutrition. Athletes should be referred to a registered dietitian nutritionist for a personalized nutrition plan. In the United States and in Canada, the Certified Specialist in Sports Dietetics is a registered dietitian nutritionist and a credentialed sports nutrition expert.
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Affiliation(s)
- D Travis Thomas
- College of Health Sciences, University of Kentucky, Lexington
| | - Kelly Anne Erdman
- Canadian Sport Institute Calgary/University of Calgary Sport Medicine Centre, Calgary, AB, Canada
| | - Louise M Burke
- AIS Sports Nutrition/Australian Institute of Sport Australia and Mary MacKillop Institute of Health Research, Australian Catholic University, Melbourne, Australia
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Mankowski RT, Anton SD, Buford TW, Leeuwenburgh C. Dietary Antioxidants as Modifiers of Physiologic Adaptations to Exercise. Med Sci Sports Exerc 2016; 47:1857-68. [PMID: 25606815 DOI: 10.1249/mss.0000000000000620] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
INTRODUCTION Adaptive responses to exercise training (ET) are crucial in maintaining physiologic homeostasis and health span. Exercise-induced aerobic bioenergetic reactions in the mitochondria and cytosol increase production of reactive oxygen species, where excess of reactive oxygen species can be scavenged by enzymatic and nonenzymatic antioxidants (AO) to protect against deleterious oxidative stress. Free radicals, however, have recently been recognized as crucial signaling agents that promote adaptive mechanisms to ET, such as mitochondrial biogenesis, AO enzyme activity defense system upregulation, insulin sensitivity, and glucose uptake in the skeletal muscle. Commonly used nonenzymatic AO supplements, such as vitamins C and E, α-lipoic acid, and polyphenols, in combination with ET, have been proposed as ways to prevent exercise-induced oxidative stress and hence improve adaptation responses to endurance training. METHODS During the PubMed search, we selected studies that examined and compared ET effects with and without administration of commonly used AO supplements. RESULTS Preclinical and clinical studies to date have shown inconsistent results indicating either positive or negative effects of endurance training combined with different blends of AO supplements (mostly vitamins C and E and α-lipoic acid) on redox status, mitochondrial biogenesis pathways, and insulin sensitivity. Preclinical reports on ET combined with resveratrol, however, have shown consistent positive effects on exercise performance, mitochondrial biogenesis, and insulin sensitivity, with clinical trials reporting mixed effects. Relevant clinical studies have been few and have used inconsistent results and methodology (types of compounds, combinations, and supplementation time). CONCLUSIONS The future studies should investigate the effects of specific AO and other popular supplements, such as α-lipoic acid and resveratrol, on training effects in humans. Of particular importance are older adults who may be at higher risk of age-related increased oxidative stress, an impaired AO enzyme defense system, and comorbidities such as hypertension, insulin resistance, and diabetes.
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Affiliation(s)
- Robert T Mankowski
- 1Department of Aging and Geriatric Research, Institute on Aging, University of Florida, Gainesville, FL; and 2Department of Rehabilitation Medicine, Erasmus University Medical Centre, Rotterdam, THE NETHERLANDS
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Abd Eldaim MA, Gaafar KM, Darwish RA, Mahboub HD, Helal MA. Prepartum vitamin A supplementation enhances goat doe health status and kid viability and performance. Small Rumin Res 2015. [DOI: 10.1016/j.smallrumres.2015.06.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Gruber J, Chen CB, Fong S, Ng LF, Teo E, Halliwell B. Caenorhabditis elegans: What We Can and Cannot Learn from Aging Worms. Antioxid Redox Signal 2015; 23:256-79. [PMID: 25544992 DOI: 10.1089/ars.2014.6210] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
SIGNIFICANCE The nematode Caenorhabditis elegans is a widely used model organism for research into aging. However, nematodes diverged from other animals between 600 and 1300 million years ago. Beyond the intuitive impression that some aspects of aging appear to be universal, is there evidence that insights into the aging process of nematodes may be applicable to humans? RECENT ADVANCES There have been a number of results in nematodes that appear to contradict long-held beliefs about mechanisms and causes of aging. For example, ablation of several key antioxidant systems has often failed to result in lifespan shortening in C. elegans. CRITICAL ISSUES While it is clear that some central signaling pathways controlling lifespan are broadly conserved across large evolutionary distances, it is less clear to what extent downstream molecular mechanisms of aging are conserved. In this review we discuss the biology of C. elegans and mammals in the context of aging and age-dependent diseases. We consider evidence from studies that attempt to investigate basic, possibly conserved mechanisms of aging especially in the context of the free radical theory of aging. Practical points, such as the need for blinding of lifespan studies and for appropriate biomarkers, are also considered. FUTURE DIRECTIONS As data on the aging process(es) in different organisms increase, it is becoming increasingly clear that there are both conserved (public) and private aspects to aging. It is important to explore the dividing lines between these two aspects and to be aware of the large gray areas in-between.
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Affiliation(s)
- Jan Gruber
- 1 Department of Biochemistry, National University of Singapore , Singapore, Singapore .,2 Yale-NUS College , Singapore, Singapore
| | - Ce-Belle Chen
- 3 Department of Physics, National University of Singapore , Singapore, Singapore
| | - Sheng Fong
- 4 Duke-NUS Graduate Medical School , Singapore, Singapore
| | - Li Fang Ng
- 1 Department of Biochemistry, National University of Singapore , Singapore, Singapore
| | - Emelyne Teo
- 1 Department of Biochemistry, National University of Singapore , Singapore, Singapore
| | - Barry Halliwell
- 1 Department of Biochemistry, National University of Singapore , Singapore, Singapore
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Evaluation of the antiaggregant activity of ascorbyl phenolic esters with antioxidant properties. J Physiol Biochem 2015; 71:415-34. [PMID: 26081024 DOI: 10.1007/s13105-015-0421-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Accepted: 06/04/2015] [Indexed: 02/02/2023]
Abstract
Beneficial effects of the antioxidant L-ascorbic acid (Asc) in human health are well known. Its particular role in hemostasis deserves further consideration, since it has been described a dose-dependent effect of Asc in platelet activity. Contrary, it has been demonstrated that phenolic compounds have inhibitory effects on platelet aggregation stimulated by the physiological agonist thrombin (Thr). Here, we have evaluated the actions of three synthetic phenolic esters of Asc: L-ascorbyl 6-protocatechuate (Prot Asc), L-ascorbyl 6-gallate (Gal Asc), and L-ascorbyl 6-caffeate (Caf Asc). All these Asc derivatives exhibited greater radical scavenging activity than Asc, and in experiments using human platelets from healthy subjects, they do not evoke changes in platelet viability upon their administration. Nevertheless, these compounds altered platelet calcium homeostasis in response to Thr, although Prot Asc induced a smaller effect than Gal Asc, Caf Asc, and Asc. As a consequence, platelet aggregation was also impaired by these compounds, reporting Prot Asc and Caf Asc a weaker antiaggregant action than Gal Asc and Asc. Treatments with Gal Asc and Caf Asc altered in larger extent the phosphorylation pattern of pp60(Src) and mammalian target of rapamycin (mTOR) evoked by stimulating human platelets with Thr. Summarizing, Prot Asc is the ascorbyl phenolic ester with the strongest antioxidant properties and weakest antiaggregant actions, and its use as antioxidant may be safer than the rest of derivatives in order to prevent thrombotic alteration in patients that need treatment with antioxidant therapies.
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Effects of tadalafil administration on plasma markers of exercise-induced muscle damage, IL6 and antioxidant status capacity. Eur J Appl Physiol 2014; 115:531-9. [PMID: 25381629 DOI: 10.1007/s00421-014-3040-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Accepted: 10/27/2014] [Indexed: 10/24/2022]
Abstract
INTRODUCTION Physical exercise is associated with enhanced production of reactive oxygen species, which if uncontrolled can result in tissue injury. Phosphodiesterase type 5 inhibitors (PDE5i) exhibit protective effect against oxidative stress, both in animals and healthy/unhealthy humans. However, the effect of a chronic administration of PDE5i, particularly combined with physical exercise, has never been investigated. PURPOSE The present study was designed to evaluate the effect of the long-acting PDE5i tadalafil on oxidative status and muscle damage after exhaustive exercise in healthy males included in a double-blind crossover trial. HYPOTHESIS Tadalafil, having a putative antioxidant activity, may reduce oxidative damage after strenuous exercise. METHODS Each volunteer randomly received two tablets of placebo or tadalafil (20 mg/day) with 36 h of interval before performing exhaustive exercise. After 2 weeks of washout, the volunteers were crossed over. Blood samples were collected immediately before exercise, immediately after, and during recovery (15, 30, 60 min). Plasma total antioxidant status, glutathione homeostasis (GSH/GSSG), malondialdehyde (MDA), protein carbonyls, creatine kinase (CK), lactate dehydrogenase (LDH) and the inflammatory cytokine interleukin 6 were assessed. RESULTS Tadalafil administration per se affected redox homeostasis (GSH/GSSG -36%; p < 0.05), cellular (CK +75% and LDH +36%; p < 0.05) and oxidative damage (MDA +41% and protein carbonyls +50%; p < 0.05) markers. The exhaustive exercise increased all the above-reported biochemical parameters, with subjects from the tadalafil group showing significantly higher values with respect to the placebo group. CONCLUSIONS A prolonged exposure to tadalafil decreases antioxidant capacity at resting condition, therefore making subjects more susceptible to the oxidative stress induced by an exhaustive bout of exercise.
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Stepanyan V, Crowe M, Haleagrahara N, Bowden B. Effects of vitamin E supplementation on exercise-induced oxidative stress: a meta-analysis. Appl Physiol Nutr Metab 2014; 39:1029-37. [DOI: 10.1139/apnm-2013-0566] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Tocopherols (commonly referred to as “vitamin E”) are frequently studied antioxidants in exercise research. However, the studies are highly heterogeneous, which has resulted in contradicting opinions. The aim of this review is to identify similar studies investigating the effects of tocopherol supplementation on exercise performance and oxidative stress and to perform minimally biased qualitative comparisons and meta-analysis. The literature search and study selection were performed according to Cochrane guidelines. A 2-dimensional study execution process was developed to enable selection of similar and comparable studies. Twenty relevant studies were identified. The high variability of study designs resulted in final selection of 6 maximally relevant studies. Markers of lipid peroxidation (malondialdehyde) and muscle damage (creatine kinase) were the 2 most frequently and similarly measured variables. Meta comparison showed that tocopherol supplementation did not result in significant protection against either exercise-induced lipid peroxidation or muscle damage. The complex antioxidant nature of tocopherols and low accumulation rates in muscle tissues could underlie an absence of protective effects.
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Affiliation(s)
- Vahan Stepanyan
- Institute of Sport and Exercise Science, School of Public Health, Tropical Medicine and Rehabilitation Sciences, James Cook University, 4811, Australia
| | - Melissa Crowe
- Institute of Sport and Exercise Science, School of Public Health, Tropical Medicine and Rehabilitation Sciences, James Cook University, 4811, Australia
| | - Nagaraja Haleagrahara
- School of Veterinary and Biomedical Sciences, James Cook University, 4811, Australia
| | - Bruce Bowden
- Discipline of Chemistry, School of Pharmacy and Molecular Sciences, James Cook University, 4811, Australia
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