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Yao L, Fu H, Bai L, Deng W, Xie F, Li Y, Zhang R, Xu X, Wang T, Lai S, Wang J. Saliva nitrite is higher in male children with autism spectrum disorder and positively correlated with serum nitrate. Redox Rep 2021; 26:124-133. [PMID: 34323675 PMCID: PMC8330712 DOI: 10.1080/13510002.2021.1959133] [Citation(s) in RCA: 6] [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] [Indexed: 12/27/2022] Open
Abstract
OBJECTIVES Nitric oxide (NO) plays a vital role in neurological development. As an easily accessible and non-invasive fluid, saliva hasn't been evaluated for nitrite among children with autism spectrum disorder (ASD). This study aims to quantify saliva nitrite and explore its relation with serum NO. METHODS Saliva sampling and pretreatment methods were optimized, followed by NO measurement via chemiluminescence for 126 ASD children and 129 normally developing children (ND). RESULTS In the ASD group, saliva nitrite was significantly higher than that in the ND, with concentrations of 4.97 ± 3.77 μM and 2.66 ± 2.07 μM (p < 0.0001), respectively. Positive correlation was observed between saliva NO2- and serum NO3- in ASD children, which didn't exist in the ND group. Male children in the ASD group had significantly higher NO than that in boys of the ND group, without significant difference between girls in both groups. Correlation was not found between saliva or serum NO and severity of these ASD children. DISCUSSION It is reported for the first time that saliva nitrite was positively correlated with serum nitrate in ASD children, with significantly higher NO only in autistic boys. Non-invasive saliva might serve as a predictor of health status of ASD children.
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Affiliation(s)
- Lulu Yao
- International Joint Research Center for General Health, Precision Medicine & Nutrition, Hubei University of Technology, Wuhan, People’s Republic of China
- Department of Biomedicine and Biopharmacology, Bioengineering and Food College, Hubei University of Technology, Wuhan, People’s Republic of China
| | - Huimin Fu
- International Joint Research Center for General Health, Precision Medicine & Nutrition, Hubei University of Technology, Wuhan, People’s Republic of China
- Department of Biomedicine and Biopharmacology, Bioengineering and Food College, Hubei University of Technology, Wuhan, People’s Republic of China
| | - Lu Bai
- International Joint Research Center for General Health, Precision Medicine & Nutrition, Hubei University of Technology, Wuhan, People’s Republic of China
- Department of Biomedicine and Biopharmacology, Bioengineering and Food College, Hubei University of Technology, Wuhan, People’s Republic of China
| | - Wenwen Deng
- International Joint Research Center for General Health, Precision Medicine & Nutrition, Hubei University of Technology, Wuhan, People’s Republic of China
- Department of Biomedicine and Biopharmacology, Bioengineering and Food College, Hubei University of Technology, Wuhan, People’s Republic of China
| | - Fang Xie
- Department of Child Health Care, Huangshi Maternity and Child Health Care Hospital, Wuhan, People’s Republic of China
| | - Ying Li
- Department of Child Health Care, Huangshi Maternity and Child Health Care Hospital, Wuhan, People’s Republic of China
| | - Rong Zhang
- Neuroscience Research Institute, Peking University, Beijing, People’s Republic of China
| | - Xinjie Xu
- Medical Science Research Center, Research Center for Translational Medicine, Department of Scientific Research, Peking Union Medical College Hospital, Beijing, People’s Republic of China
| | - Ting Wang
- Department of Neurology, Maternal and Child Hospital of Hubei Province, Wuhan, People’s Republic of China
| | - Shenghan Lai
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Jun Wang
- International Joint Research Center for General Health, Precision Medicine & Nutrition, Hubei University of Technology, Wuhan, People’s Republic of China
- Department of Biomedicine and Biopharmacology, Bioengineering and Food College, Hubei University of Technology, Wuhan, People’s Republic of China
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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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Marshall AR, Rimmer JE, Shah N, Bye K, Kipps C, Woods DR, O'Hara J, Boos CJ, Barlow M. Marching to the Beet: The effect of dietary nitrate supplementation on high altitude exercise performance and adaptation during a military trekking expedition. Nitric Oxide 2021; 113-114:70-77. [PMID: 34051342 DOI: 10.1016/j.niox.2021.05.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 03/19/2021] [Accepted: 05/23/2021] [Indexed: 10/21/2022]
Abstract
PURPOSE The aim was to investigate the effect of dietary nitrate supplementation (in the form of beetroot juice, BRJ) for 20 days on salivary nitrite (a potential precursor of bioactive nitric oxide), exercise performance and high altitude (HA) acclimatisation in field conditions (hypobaric hypoxia). METHODS This was a single-blinded randomised control study of 22 healthy adult participants (12 men, 10 women, mean age 28 ± 12 years) across a HA military expedition. Participants were randomised pre-ascent to receive two 70 ml dose per day of either BRJ (~12.5 mmol nitrate per day; n = 11) or non-nitrate calorie matched control (n = 11). Participants ingested supplement doses daily, beginning 3 days prior to departure and continued until the highest sleeping altitude (4800 m) reached on day 17 of the expedition. Data were collected at baseline (44 m altitude), at 2350 m (day 9), 3400 m (day 12) and 4800 m (day 17). RESULTS BRJ enhanced the salivary levels of nitrite (p = 0.007). There was a significant decrease in peripheral oxygen saturation and there were increases in heart rate, diastolic blood pressure, and rating of perceived exertion with increasing altitude (p=<0.001). Harvard Step Test fitness scores significantly declined at 4800 m in the control group (p = 0.003) compared with baseline. In contrast, there was no decline in fitness scores at 4800 m compared with baseline (p = 0.26) in the BRJ group. Heart rate recovery speed following exercise at 4800 m was significantly prolonged in the control group (p=<0.01) but was unchanged in the BRJ group (p = 0.61). BRJ did not affect the burden of HA illness (p = 1.00). CONCLUSIONS BRJ increases salivary nitrite levels and ameliorates the decline in fitness at altitude but does not affect the occurrence of HA illness.
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Affiliation(s)
- Anna R Marshall
- Department of Surgical and Interventional Sciences, Institute of Sport, Exercise & Health, UCL, London, WC1E 6B, UK.
| | | | - Nishma Shah
- Department of Surgical and Interventional Sciences, Institute of Sport, Exercise & Health, UCL, London, WC1E 6B, UK
| | - Kyo Bye
- Defence Medical Services, Lichfield, WS14 9PY, UK
| | - Courtney Kipps
- Department of Surgical and Interventional Sciences, Institute of Sport, Exercise & Health, UCL, London, WC1E 6B, UK
| | - David R Woods
- Defence Medical Services, Lichfield, WS14 9PY, UK; Carneige School of Sport, Leeds Beckett University, Leeds, LS16 5LF, UK; Northumbria and Newcastle NHS Trusts, Wansbeck General and Royal Victoria Infirmary, Newcastle, NE66 2NS, UK
| | - John O'Hara
- Carneige School of Sport, Leeds Beckett University, Leeds, LS16 5LF, UK
| | - Christopher J Boos
- Carneige School of Sport, Leeds Beckett University, Leeds, LS16 5LF, UK; Department of Cardiology, Poole Hospital NHS Foundation Trust, Poole, BH15 2JB, UK; Department of Postgraduate Medical Education, Bournemouth University, Bournemouth, BH1 3LT, UK
| | - Matthew Barlow
- Carneige School of Sport, Leeds Beckett University, Leeds, LS16 5LF, UK
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Rostoka E, Salna I, Dekante A, Pahirko L, Borisovs V, Celma L, Valeinis J, Sjakste N, Sokolovska J. DNA damage in leukocytes and serum nitrite concentration are negatively associated in type 1 diabetes. Mutagenesis 2021; 36:213-222. [PMID: 34008029 DOI: 10.1093/mutage/geab015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 05/12/2021] [Indexed: 11/12/2022] Open
Abstract
Chronic hyperglycaemia leads to DNA damage in diabetes and might be associated with nitrosative stress. In this study, we aimed at assessing the level of DNA strand breaks in leukocytes, serum nitrite and nitrate in patients with type 1 diabetes and healthy controls and associations of these parameters with diabetes-related outcomes in a prospective study. The level of DNA damage was determined in 71 patients with type 1 diabetes and 57 healthy controls by comet assay and scored with arbitrary units (AU). The chemiluminescence method was used to measure nitrite and nitrate. Clinical information and data on consumption of alcohol, physical activity and smoking were collected. Progression of complications in patients with diabetes was assessed after a follow-up time of 4-5 years. We observed a higher level of DNA damage in leukocytes of patients with type 1 diabetes compared with healthy subjects [type 1 diabetes AU 50 (36-74.5); control AU 30 (24.1-43), P < 0.001]. According to regression, type 1 diabetes leads to a 2-fold increase in DNA damage. In the group of type 1 diabetes, DNA damage correlated positively with total cholesterol (R = 0.262, P = 0.028) and negatively with serum glucose level (R = -0.284; P = 0.018) and serum nitrite (R = -0.335; P = 0.008). DNA damage was not significantly associated with HbA1c, diabetes duration, complications and lifestyle factors. However, DNA damage > 57 AU was associated with statistically significantly lower serum nitrite and 1.52 higher risk of progression of complications of diabetes over the follow-up period. The latter result was not statistically significant due to insufficient study power [relative risk 1.52 (95% confidence interval = 0.68, 3.42, P = 0.31)]. Our results confirm that type 1 diabetes is associated with a higher level of DNA strand breaks in leukocytes when compared with the reference group and demonstrate the negative association between DNA damage and serum nitrite concentration.
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Affiliation(s)
- Evita Rostoka
- Faculty of Medicine, University of Latvia, Jelgavas Street 3, LV1004 Riga, Latvia
| | - Ilze Salna
- Residency Development Program, University of Latvia, Aspazijas Bvd. 5, LV1050 Riga, Latvia
| | - Alise Dekante
- Residency Development Program, University of Latvia, Aspazijas Bvd. 5, LV1050 Riga, Latvia
| | - Leonora Pahirko
- Faculty of Physics, Mathematics and Optometry, University of Latvia, Jelgavas Street 3, LV1004 Riga, Latvia
| | - Vitalijs Borisovs
- Faculty of Medicine, University of Latvia, Jelgavas Street 3, LV1004 Riga, Latvia
| | - Laura Celma
- Faculty of Medicine, University of Latvia, Jelgavas Street 3, LV1004 Riga, Latvia
| | - Jānis Valeinis
- Faculty of Physics, Mathematics and Optometry, University of Latvia, Jelgavas Street 3, LV1004 Riga, Latvia
| | - Nikolajs Sjakste
- Faculty of Medicine, University of Latvia, Jelgavas Street 3, LV1004 Riga, Latvia
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Conger SA, Zamzow CM, Darnell ME. Acute Beet Juice Supplementation Does Not Improve 30- or 60-second Maximal Intensity Performance in Anaerobically Trained Athletes. INTERNATIONAL JOURNAL OF EXERCISE SCIENCE 2021; 14:60-75. [PMID: 34055148 PMCID: PMC8136611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Research suggests that beet juice is beneficial during aerobic exercise. However, the impact of beet juice during primarily anaerobic exercise is equivocal. The purpose of this study was to determine the effects of acute beet juice supplementation on maximal intensity performance during 30-s and 60-s maximal-intensity cycling sprints. Using a double-blind, crossover-study design, 14 anaerobically trained male hockey players completed six Wingate cycling tests: familiarization trials of a 30-s and 60-s Wingate test, followed by 30-s Wingate placebo/beet juice trials, and 60-s Wingate placebo/beet juice trials. Repeated measures ANOVAs were used to compare the change in power between conditions over the duration of each trial. Paired t-tests were run to compare performance between conditions of various work and power variables. One-way ANOVAs were utilized to compare the change between conditions of the 30-s test to the change between conditions of the 60-s test. Beet juice supplementation yielded no statistical differences from placebo in any of the measured variables during the 30-s or 60-s tests (p > 0.05). The percent change for fatigue index was significantly different between the 30-s and 60-s tests (p = 0.032) suggesting less fatigue with beet juice supplementation. Overall, beet juice did not improve maximal intensity performance during 30-s or 60-s cycling sprint tests. Performance during the 60-s bout was not impacted to a greater extent than the 30-s bout after beet juice supplementation. These results suggest that beet juice supplementation does not improve short-duration exercise performance in anaerobically trained athletes.
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Affiliation(s)
- Scott A Conger
- Department of Kinesiology, Boise State University, Boise, ID USA
| | - Clare M Zamzow
- Department of Kinesiology, Boise State University, Boise, ID USA
| | - Matthew E Darnell
- Department of Sports Medicine and Nutrition, University of Pittsburgh, Pittsburgh, PA USA
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Agricola NPA, Guillo LA. ENDOTHELIAL NITRIC OXIDE CONCENTRATIONS IN THE SALIVA OF JIU-JITSU ATHLETES. REV BRAS MED ESPORTE 2020. [DOI: 10.1590/1517-869220202604218318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
ABSTRACT Introduction This article discusses the production of nitric oxide under the influence of sport-specific physical training, measured by the salivary nitrite of Jiu-Jitsu athletes. Objectives To verify the potential of the sport to produce optimal levels of nitric oxide stimulated by exertion, and to quantify training-related nitric oxide concentrations. Method The study participants were 14 volunteer athletes from the Tatame project (extension project), who were monitored for nine months in their training routine, providing samples of unstimulated saliva. Samples were collected each month, in three periods of the day: in the morning upon waking, immediately before training, and immediately after training. Salivary nitrite was quantified by the colorimetric Griess assay. Training heart rates were also monitored in order to establish training intensity. Results Mean monthly salivary nitrite levels showed a significant correlation with mean monthly heart rates, suggesting that salivary nitrite responds to training. However, salivary nitrite concentrations measured immediately after training were always lower than in the pre-training period. Conclusion The post-training reduction in concentrations was due to the nature of the sport studied, since because it involves a fight, the intense sympathetic stimulation inhibited salivary gland activity and irrigation, preventing salivary nitrite from producing an increase in circulating nitric oxide. Level of evidence IV; Case series.
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Maciejczyk M, Szulimowska J, Taranta-Janusz K, Wasilewska A, Zalewska A. Salivary Gland Dysfunction, Protein Glycooxidation and Nitrosative Stress in Children with Chronic Kidney Disease. J Clin Med 2020; 9:E1285. [PMID: 32365532 PMCID: PMC7287576 DOI: 10.3390/jcm9051285] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 04/22/2020] [Accepted: 04/27/2020] [Indexed: 01/07/2023] Open
Abstract
This study is the first to evaluate protein glycooxidation products, lipid oxidative damage and nitrosative stress in non-stimulated (NWS) and stimulated whole saliva (SWS) of children with chronic kidney disease (CKD) divided into two subgroups: normal salivary secretion (n = 18) and hyposalivation (NWS flow < 0.2 mL min-1; n = 12). Hyposalivation was observed in all patients with severe renal failure (4-5 stage CKD), while saliva secretion > 0.2 mL/min in children with mild-moderate CKD (1-3 stage) and controls. Salivary amylase activity and total protein content were significantly lower in CKD children with hyposalivation compared to CKD patients with normal saliva secretion and control group. The fluorescence of protein glycooxidation products (kynurenine, N-formylkynurenine, advanced glycation end products), the content of oxidative damage to lipids (4-hydroxynonneal, 8-isoprostanes) and nitrosative stress (peroxynitrite, nitrotyrosine) were significantly higher in NWS, SWS, and plasma of CKD children with hyposalivation compared to patients with normal salivary secretion and healthy controls. In CKD group, salivary oxidation products correlated negatively with salivary flow rate, -amylase activity and total protein content; however, salivary oxidation products do not reflect their plasma level. In conclusion, children with CKD suffer from salivary gland dysfunction. Oxidation of salivary proteins and lipids increases with CKD progression and deterioration of salivary gland function.
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Affiliation(s)
- Mateusz Maciejczyk
- Department of Hygiene, Epidemiology and Ergonomics, Medical University of Bialystok, 2c Mickiewicza Street, 15-233 Bialystok, Poland
| | - Julita Szulimowska
- Department of Pedodontics, Medical University of Bialystok, 24a M. Sklodowskiej-Curie Street, 15-274 Bialystok, Poland;
| | - Katarzyna Taranta-Janusz
- Department of Pediatrics and Nephrology, Medical University of Bialystok, 24a M. Sklodowskiej-Curie Street, 15-274 Bialystok, Poland; (K.T.-J.); (A.W.)
| | - Anna Wasilewska
- Department of Pediatrics and Nephrology, Medical University of Bialystok, 24a M. Sklodowskiej-Curie Street, 15-274 Bialystok, Poland; (K.T.-J.); (A.W.)
| | - Anna Zalewska
- Experimental Dentistry Laboratory, Medical University of Bialystok, 24a M. Sklodowskiej-Curie Street, 15-274 Bialystok, Poland or
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Gusev EY, Zotova NV. Cellular Stress and General Pathological Processes. Curr Pharm Des 2020; 25:251-297. [PMID: 31198111 DOI: 10.2174/1381612825666190319114641] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 03/13/2019] [Indexed: 02/06/2023]
Abstract
From the viewpoint of the general pathology, most of the human diseases are associated with a limited number of pathogenic processes such as inflammation, tumor growth, thrombosis, necrosis, fibrosis, atrophy, pathological hypertrophy, dysplasia and metaplasia. The phenomenon of chronic low-grade inflammation could be attributed to non-classical forms of inflammation, which include many neurodegenerative processes, pathological variants of insulin resistance, atherosclerosis, and other manifestations of the endothelial dysfunction. Individual and universal manifestations of cellular stress could be considered as a basic element of all these pathologies, which has both physiological and pathophysiological significance. The review examines the causes, main phenomena, developmental directions and outcomes of cellular stress using a phylogenetically conservative set of genes and their activation pathways, as well as tissue stress and its role in inflammatory and para-inflammatory processes. The main ways towards the realization of cellular stress and its functional blocks were outlined. The main stages of tissue stress and the classification of its typical manifestations, as well as its participation in the development of the classical and non-classical variants of the inflammatory process, were also described. The mechanisms of cellular and tissue stress are structured into the complex systems, which include networks that enable the exchange of information with multidirectional signaling pathways which together make these systems internally contradictory, and the result of their effects is often unpredictable. However, the possible solutions require new theoretical and methodological approaches, one of which includes the transition to integral criteria, which plausibly reflect the holistic image of these processes.
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Affiliation(s)
- Eugeny Yu Gusev
- Laboratory of the Immunology of Inflammation, Institute of Immunology and Physiology, Yekaterinburg, Russian Federation
| | - Natalia V Zotova
- Laboratory of the Immunology of Inflammation, Institute of Immunology and Physiology, Yekaterinburg, Russian Federation.,Department of Medical Biochemistry and Biophysics, Ural Federal University named after B.N.Yeltsin, Yekaterinburg, Russian Federation
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Babateen AM, Shannon OM, Mathers JC, Siervo M. Validity and reliability of test strips for the measurement of salivary nitrite concentration with and without the use of mouthwash in healthy adults. Nitric Oxide 2019; 91:15-22. [DOI: 10.1016/j.niox.2019.07.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 06/10/2019] [Accepted: 07/08/2019] [Indexed: 12/19/2022]
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Zhurakivska K, Troiano G, Caponio VCA, Dioguardi M, Laino L, Maffione AB, Lo Muzio L. Do Changes in Oral Microbiota Correlate With Plasma Nitrite Response? A Systematic Review. Front Physiol 2019; 10:1029. [PMID: 31456696 PMCID: PMC6700760 DOI: 10.3389/fphys.2019.01029] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Accepted: 07/25/2019] [Indexed: 01/20/2023] Open
Abstract
Background: Nitric Oxide (NO) has a role in immunitary defense, regulation of mucosal blood flow and mucus production, regulation of smooth muscle contraction, cerebral blood flow, glucose regulation, and mitochondrial function. NO can be synthetized endogenously through the L-arginine-NO pathway or it can be absorbed by the human intestine through the dietary intake. Most of the ingested NO is in the form of nitrate (NO3−). NO3− is a substrate of oral and intestinal microbiota and, at the end of the catabolic pathway, NO is released. Using antibacterial mouthwashes leads to an alteration of salivary NO3− metabolism, however, with unclear consequences on the circulating NO levels. The aim of this study is to perform a systematic review in order to elucidate if the alterations of oral microbiota lead to modifications in plasma NO content. Methods: Electronic databases were screened, using the following terms: [“oral bacteria” and (nitrate OR nitrite OR nitric)]. Clinical studies reporting NO3− and NO2− measurements in blood and their correlation to oral microbiota variations were included. We focused on the correlation between the changes in oral microbiota and plasma concentrations of nitrites (primary outcome). Subsequently, we investigated if modifications in oral microbiota could lead to changes in blood pressure and salivary NO2− concentration (secondary outcome). Results: Six studies, for a total of 82 participants were included in this review. In four studies, the use of mouthwash correlated to a reduction of plasma nitrite concentration (p < 0.05); Two studies did not find any difference in plasma nitrate or nitrite concentration. In five studies, a correlation between blood pressure (BP) changes and antibacterial mouthwashing emerged. Anyway, only three studies suggested a significant increase of systolic BP following mouthwashing compared with controls. Conclusions: Although, the role of oral bacteria has been unequivocally demonstrated in the regulation of salivary NO3− metabolism, their influence on plasma concentration of NO species remains ambiguous. Further studies with larger sample size are required in order to demonstrate if an alteration in oral microbiota composition may influence the blood content of NO3−/NO2−/NO and all the linked biological processes.
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Affiliation(s)
- Khrystyna Zhurakivska
- Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
| | - Giuseppe Troiano
- Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
| | | | - Mario Dioguardi
- Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
| | - Luigi Laino
- Multidisciplinary Department of Medical-Surgical and Odontostomatological Specialties, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Angela Bruna Maffione
- Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
| | - Lorenzo Lo Muzio
- Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
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Thomas B, Smallwood S, Cutler C, Bescos R. The oral nitrate-reducing capacity correlates with peak power output and peak oxygen uptake in healthy humans. Nitric Oxide 2019; 87:43-51. [PMID: 30853629 DOI: 10.1016/j.niox.2019.03.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 01/31/2019] [Accepted: 03/04/2019] [Indexed: 12/14/2022]
Abstract
Interest in inorganic nitrate and nitrite has grown substantially over the past decade as research has revealed the role of these anions in enhancing nitric oxide (NO) availability through an oral pathway. Nitrite synthesis in the mouth seems to be an important mechanism to feed the circulatory system with this anion. This is interesting since greater plasma nitrite concentration has been associated with better fitness levels in humans, but this question has not been investigated in relation to salivary nitrite concentration. Additionally, no previous study has investigated the oral nitrate-reducing capacity in regards to peak oxygen uptake (VO2peak) or peak power output (Wpeak) in humans. Thus, the main goal of this study was to investigate whether salivary nitrite and nitrate concentration and the oral nitrate-reducing capacity were associated with VO2peak and Wpeak in healthy humans. Fifty individuals (22 females and 28 males; 38.8 ± 14.3 years/old; BMI = 22.8 ± 3.9) performed a graded exercise test on a cycle ergometer to assess their VO2peak and Wpeak. Unstimulated salivary samples were taken before and 20 min after exercise to measure nitrate/nitrite, pH and lactate. The oral nitrate-reducing capacity was also assessed in 25 subjects before and after exercise. Oral nitrate-reducing capacity was positively associated with Wpeak (rs = 0.64; P = 0.001) and the VO2peak (rs = 0.54; P = 0.005). Similar correlations were found when these variables were analysed after exercise. In addition, a significant decrease in salivary pH (pre: 7.28 ± 0.361; post-exercise: 7.16 ± 0.33; P = 0.003) accompanied by an increase of salivary lactate (pre: 0.17 ± 0.14 mmol/L; post-exercise: 0.48 ± 0.38; P < 0.001) was found after exercise. However, these changes did not have any impact on salivary nitrate/nitrite concentration and the oral nitrate-reducing capacity after exercise. In conclusion, this is the first evidence showing a link between the oral nitrate-reducing capacity and markers of aerobic fitness levels in healthy humans.
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Affiliation(s)
- B Thomas
- School of Health Professions, Faculty of Health & Human Sciences, University of Plymouth, UK
| | - S Smallwood
- School of Health Professions, Faculty of Health & Human Sciences, University of Plymouth, UK
| | - C Cutler
- School of Health Professions, Faculty of Health & Human Sciences, University of Plymouth, UK
| | - R Bescos
- School of Health Professions, Faculty of Health & Human Sciences, University of Plymouth, UK; Institute of Health & Community, University of Plymouth, UK.
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Dahlberg CJ, Ou JJ, Babish JG, Lamb JJ, Eliason S, Brabazon H, Gao W, Kaadige MR, Tripp ML. A 13-week low glycemic load diet and lifestyle modification program combining low glycemic load protein shakes and targeted nutraceuticals improved weight loss and cardio-metabolic risk factors. Can J Physiol Pharmacol 2017; 95:1414-1425. [PMID: 28800398 DOI: 10.1139/cjpp-2016-0704] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
An open-label, randomized, exploratory study of 44 healthy overweight subjects with cardio-metabolic syndrome (CMS) risk factors was conducted to assess the safety, tolerability, and efficacy of a proprietary lifestyle modification program without (DIET) and with (PROG) targeted nutraceutical supplementation, including phytosterols, antioxidants, probiotics, fish oil, berberine, and soy, pea, and whey proteins over 13 weeks. Key metrics were recorded at baseline and weeks 9 and 13. For the DIET and PROG groups, compliance was 85% and 86%, respectively, with no adverse events related to the diet or supplements. Twelve subjects discontinued participation before week 9 for reasons unrelated to the study. PROG subjects experienced greater decreases (p < 0.05) than DIET in body mass, fat mass, total cholesterol, LDL cholesterol, TG, cholesterol / HDL ratio, TG/HDL ratio, apolipoprotein B / apolipoprotein A1 ratio, and hs-CRP. The Framingham 10-year cardiovascular disease risk score decreased by 40% (p < 0.01) in the PROG arm versus no change for the DIET arm. As a pilot study, it was not possible to state whether the observed effects were the result of nutraceutical supplementation alone or the result of additive or synergistic interactions among diet, lifestyle modifications, and nutraceutical supplementation. Moreover, individuals with CMS risk factors following a lifestyle modification program received additional health benefits from targeted nutraceutical supplementation.
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Affiliation(s)
- Clinton J Dahlberg
- a Hughes Center for Research and Innovation, Nature's Sunshine, 2500 Executive Parkway, Lehi, UT 84043, USA
| | - Joseph J Ou
- a Hughes Center for Research and Innovation, Nature's Sunshine, 2500 Executive Parkway, Lehi, UT 84043, USA
| | - John G Babish
- b Bio Nexus Ltd., 53 Brown Road, Suite B, Ithaca, NY 14850, USA
| | - Joseph J Lamb
- c Hypertension Institute of Nashville, St. Thomas Medical Group, 4230 Harding Road, Nashville, TN 37205, USA
| | - Sarah Eliason
- a Hughes Center for Research and Innovation, Nature's Sunshine, 2500 Executive Parkway, Lehi, UT 84043, USA
| | - Holly Brabazon
- a Hughes Center for Research and Innovation, Nature's Sunshine, 2500 Executive Parkway, Lehi, UT 84043, USA
| | - Wei Gao
- a Hughes Center for Research and Innovation, Nature's Sunshine, 2500 Executive Parkway, Lehi, UT 84043, USA
| | - Mohan R Kaadige
- a Hughes Center for Research and Innovation, Nature's Sunshine, 2500 Executive Parkway, Lehi, UT 84043, USA
| | - Matthew L Tripp
- a Hughes Center for Research and Innovation, Nature's Sunshine, 2500 Executive Parkway, Lehi, UT 84043, USA
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13
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Modi A, Morou-Bermudez E, Vergara J, Patel RP, Nichols A, Joshipura K. Validation of two point-of-care tests against standard lab measures of NO in saliva and in serum. Nitric Oxide 2017; 64:16-21. [PMID: 28153714 PMCID: PMC5569892 DOI: 10.1016/j.niox.2017.01.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Revised: 01/13/2017] [Accepted: 01/23/2017] [Indexed: 01/21/2023]
Abstract
Nitric oxide (NO) is an endogenous signaling molecule, which plays important roles in cardiometabolic health. A significant source of NO is dietary nitrate (NO3), which is initially metabolized by oral bacteria into nitrite (NO2-) and is subsequently converted into NO once digested in the acidic gastric environment. Inexpensive non-invasive tests for measuring nitrite from saliva have been developed as a means for individuals to monitor their NO bioavailability. However, few studies exist in the literature validating and comparing these products with standard lab assays. The objective of this study was to validate two commonly used commercial strips: Nitric Oxide Test Strips (Berkeley Test) and Nitric Oxide Indicator Strips (Neogenesis) against standard lab measures for saliva and serum nitrite/nitrate. A stratified random sample of 20 non-smoking, overweight or obese participants between 40 to 65 years of age, were selected for this study from the baseline data of the San Juan Overweight Adults Longitudinal Study (SOALS). There was a significant correlation between the measures from the two nitrite-detecting-strips after controlling for the stratification variables (metabolic syndrome, and mouthwash use) (r = 0.75). Measurements from both strips correlated significantly with salivary nitrite levels (r = 0.76 for Berkeley strips; r = 0.59 for Neogenesis). Neither of the strips had a significant correlation with the levels of saliva nitrate, serum nitrite and serum nitrate. In conclusion, commercially available Berkeley and Neogenesis strips provide a reasonable surrogate for salivary, but not for systemic nitrite levels.
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Affiliation(s)
- Ashwin Modi
- Center for Clinical Research and Health Promotion, University of Puerto Rico, Medical Sciences Campus, San Juan, Puerto Rico, USA
| | | | - Jose Vergara
- Center for Clinical Research and Health Promotion, University of Puerto Rico, Medical Sciences Campus, San Juan, Puerto Rico, USA
| | - Rakesh P Patel
- Department of Pathology and Center for Free Radical Biology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Alexandria Nichols
- UAB School of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Kaumudi Joshipura
- Center for Clinical Research and Health Promotion, University of Puerto Rico, Medical Sciences Campus, San Juan, Puerto Rico, USA; Department of Epidemiology, Harvard T. H. Chan School of Public Health, Boston, USA.
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Koch CD, Gladwin MT, Freeman BA, Lundberg JO, Weitzberg E, Morris A. Enterosalivary nitrate metabolism and the microbiome: Intersection of microbial metabolism, nitric oxide and diet in cardiac and pulmonary vascular health. Free Radic Biol Med 2017; 105:48-67. [PMID: 27989792 PMCID: PMC5401802 DOI: 10.1016/j.freeradbiomed.2016.12.015] [Citation(s) in RCA: 102] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 11/18/2016] [Accepted: 12/12/2016] [Indexed: 02/07/2023]
Abstract
Recent insights into the bioactivation and signaling actions of inorganic, dietary nitrate and nitrite now suggest a critical role for the microbiome in the development of cardiac and pulmonary vascular diseases. Once thought to be the inert, end-products of endothelial-derived nitric oxide (NO) heme-oxidation, nitrate and nitrite are now considered major sources of exogenous NO that exhibit enhanced vasoactive signaling activity under conditions of hypoxia and stress. The bioavailability of nitrate and nitrite depend on the enzymatic reduction of nitrate to nitrite by a unique set of bacterial nitrate reductase enzymes possessed by specific bacterial populations in the mammalian mouth and gut. The pathogenesis of pulmonary hypertension (PH), obesity, hypertension and CVD are linked to defects in NO signaling, suggesting a role for commensal oral bacteria to shape the development of PH through the formation of nitrite, NO and other bioactive nitrogen oxides. Oral supplementation with inorganic nitrate or nitrate-containing foods exert pleiotropic, beneficial vascular effects in the setting of inflammation, endothelial dysfunction, ischemia-reperfusion injury and in pre-clinical models of PH, while traditional high-nitrate dietary patterns are associated with beneficial outcomes in hypertension, obesity and CVD. These observations highlight the potential of the microbiome in the development of novel nitrate- and nitrite-based therapeutics for PH, CVD and their risk factors.
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Affiliation(s)
- Carl D Koch
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA 15261, USA.
| | - Mark T Gladwin
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA 15261, USA; Pittsburgh Heart, Lung, Blood and Vascular Medicine Institute, University of Pittsburgh, Pittsburgh PA 15261, USA
| | - Bruce A Freeman
- Pittsburgh Heart, Lung, Blood and Vascular Medicine Institute, University of Pittsburgh, Pittsburgh PA 15261, USA; Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Jon O Lundberg
- Department of Physiology and Pharmacology, Karolinska Institutet, S-17177 Stockholm, Sweden
| | - Eddie Weitzberg
- Department of Physiology and Pharmacology, Karolinska Institutet, S-17177 Stockholm, Sweden
| | - Alison Morris
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA 15261, USA; Pittsburgh Heart, Lung, Blood and Vascular Medicine Institute, University of Pittsburgh, Pittsburgh PA 15261, USA; Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, PA 15261, USA; Department of Physiology and Pharmacology, Karolinska Institutet, S-17177 Stockholm, Sweden
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Sukuroglu E, Güncü GN, Kilinc K, Caglayan F. Using Salivary Nitrite and Nitrate Levels as a Biomarker for Drug-Induced Gingival Overgrowth. Front Cell Infect Microbiol 2015; 5:87. [PMID: 26649282 PMCID: PMC4664664 DOI: 10.3389/fcimb.2015.00087] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2015] [Accepted: 11/16/2015] [Indexed: 12/13/2022] Open
Abstract
Aim: Drug-induced gingival overgrowth has a multifactorial nature and the pathogenesis is still uncertain. It has been suggested that Nitric Oxide (NO) might play a role in the pathogenesis of drug-induced gingival overgrowth due to the contribution of NO to immune response and matrix degradation. NO levels in biological fluids have been used as a diagnostic biomarker in many diseases. The aim of this study is to determine whether NO levels in plasma, saliva, and gingival crevicular fluid (GCF) can serve as a potential biomarker for the evaluation of drug-induced gingival overgrowth risk. Materials and Methods: A total of 104 patients, receiving cyclosporine A (n = 35), phenytoin (n = 25), nifedipine (n = 26), or diltiazem (n = 18) participated in the study. The amount of gingival overgrowth was evaluated with two indices and was given as percentage. Periodontal clinical parameters including plaque index (PI), gingival index (GI), gingival bleeding time index (GBTI), and probing depth (PD) were also assessed. Saliva, GCF, and plasma samples were obtained from each participants. Nitrite and nitrate levels in saliva, GCF, and plasma were analyzed by Griess reagent. Results: Salivary nitrite and nitrate levels in responders were significantly higher than those in non-responders in only phenytoin group (p < 0.05). Nitrite and nitrate levels of gingival crevicular fluid and plasma did not significantly differ between responders and non-responders in all study groups (p > 0.05). Salivary nitrite levels exhibited a significant correlation with PD, GBTI, severity of gingival overgrowth (%GO), and GCF volume (p < 0.05). Additionally, a strong positive correlation was detected between saliva and plasma nitrate levels (p < 0.005). However, both nitrite and nitrate levels in GCF and plasma demonstrated no significant correlation with clinical parameters, GO severity, and GCF volume (p > 0.05). Conclusion: Salivary nitrite and nitrate levels could be used as periodontal disease biomarkers in phenytoin induced gingival overgrowth, and that saliva seems to have a better diagnostic potential than GCF and plasma for the evaluation of drug-induced gingival overgrowth risk. However, when all drug groups were considered, saliva nitrite and nitrate levels could not be used as a biomarker for drug-induced gingival overgrowth.
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Affiliation(s)
- Erkan Sukuroglu
- Department of Periodontology, Faculty of Dentistry, Karadeniz Technical University Trabzon, Turkey
| | - Güliz N Güncü
- Department of Periodontology, Faculty of Dentistry, Hacettepe University Ankara, Turkey
| | - Kamer Kilinc
- Department of Biochemistry, TOBB University of Economics and Technology Ankara, Turkey
| | - Feriha Caglayan
- Department of Periodontology, Faculty of Dentistry, Hacettepe University Ankara, Turkey
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Tóthová L, Kamodyová N, Červenka T, Celec P. Salivary markers of oxidative stress in oral diseases. Front Cell Infect Microbiol 2015; 5:73. [PMID: 26539412 PMCID: PMC4611854 DOI: 10.3389/fcimb.2015.00073] [Citation(s) in RCA: 97] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Accepted: 10/02/2015] [Indexed: 12/30/2022] Open
Abstract
Saliva is an interesting alternative diagnostic body fluid with several specific advantages over blood. These include non-invasive and easy collection and related possibility to do repeated sampling. One of the obstacles that hinders the wider use of saliva for diagnosis and monitoring of systemic diseases is its composition, which is affected by local oral status. However, this issue makes saliva very interesting for clinical biochemistry of oral diseases. Periodontitis, caries, oral precancerosis, and other local oral pathologies are associated with oxidative stress. Several markers of lipid peroxidation, protein oxidation and DNA damage induced by reactive oxygen species can be measured in saliva. Clinical studies have shown an association with oral pathologies at least for some of the established salivary markers of oxidative stress. This association is currently limited to the population level and none of the widely used markers can be applied for individual diagnostics. Oxidative stress seems to be of local oral origin, but it is currently unclear whether it is caused by an overproduction of reactive oxygen species due to inflammation or by the lack of antioxidants. Interventional studies, both, in experimental animals as well as humans indicate that antioxidant treatment could prevent or slow-down the progress of periodontitis. This makes the potential clinical use of salivary markers of oxidative stress even more attractive. This review summarizes basic information on the most commonly used salivary markers of oxidative damage, antioxidant status, and carbonyl stress and the studies analyzing these markers in patients with caries or periodontitis.
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Affiliation(s)
- L'ubomíra Tóthová
- Institute of Molecular Biomedicine, Faculty of Medicine, Comenius University Bratislava, Slovakia ; Center for Molecular Medicine, Slovak Academy of Sciences Bratislava, Slovakia
| | - Natália Kamodyová
- Institute of Molecular Biomedicine, Faculty of Medicine, Comenius University Bratislava, Slovakia
| | - Tomáš Červenka
- Institute of Molecular Biomedicine, Faculty of Medicine, Comenius University Bratislava, Slovakia
| | - Peter Celec
- Institute of Molecular Biomedicine, Faculty of Medicine, Comenius University Bratislava, Slovakia ; Center for Molecular Medicine, Slovak Academy of Sciences Bratislava, Slovakia ; Department of Molecular Biology, Faculty of Natural Sciences, Comenius University Bratislava, Slovakia ; Institute of Pathophysiology, Faculty of Medicine, Comenius University Bratislava, Slovakia
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