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Dietary nitrate

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https://www.readbyqxmd.com/read/29444414/no-individual-or-combined-effects-of-caffeine-and-beetroot-juice-supplementation-during-submaximal-or-maximal-running
#1
Johanna Oskarsson, Kerry McGawley
BACKGROUND: Dietary supplements such as caffeine and beetroot juice are used by athletes in an attempt to optimize performance and therefore gain an advantage in competition. AIM: To investigate the individual and combined effects of caffeine and beetroot-juice supplementation during submaximal and maximal treadmill running. METHODS: Seven males (VO<sub>2max</sub>: 59.0 ± 2.9 mL/kg/min) and two females (VO<sub>2max</sub>: 53...
February 14, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29432741/dietary-nitrate-protects-submandibular-gland-from-hyposalivation-in-ovariectomized-rats-via-suppressing-cell-apoptosis
#2
Yipu Xu, Baoxing Pang, Liang Hu, Xiaoyu Feng, Lei Hu, Jingsong Wang, Chunmei Zhang, Songlin Wang
Xerostomia, a major oral symptom of menopause, is a subjective feeling of dry mouth associated with oral pain and difficulties in deglutition and speech, which significantly reduces patient's quality of life. Dietary nitrate, which can be converted to nitric oxide, has multiple physiological functions in the body, including antioxidant activity and vasodilatation; however, its protective effect against xerostomia remains poorly understood. The present study aimed to evaluate the effects of dietary nitrate on estrogen deficiency-induced xerostomia...
February 9, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29428840/organ-uptake-and-release-of-inorganic-nitrate-and-nitrite-in-the-pig
#3
Karin E Eriksson, Ting Yang, Mattias Carlström, Eddie Weitzberg
Numerous studies have shown beneficial cardiovascular and metabolic effects of dietary nitrate but the release or uptake of these anions on an organ level is still poorly elucidated. Here we administered sodium nitrate in the pig and measured acute changes in release/uptake of nitrate and nitrite across several organs as well as cardiovascular and metabolic functions. In 17 anesthetized pigs multiple venous catheters and arterial ultrasonic blood flow probes were positioned. After pretreatment with the NO synthase (NOS) inhibitor l-NAME to minimize involvement of NOS-dependent nitrate/nitrite generation, the animals received bolus injections of either sodium nitrate or sodium chloride...
February 8, 2018: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/29380952/acute-ingestion-of-dietary-nitrate-increases-muscle-blood-flow-via-local-vasodilation-during-handgrip-exercise-in-young-adults
#4
Jennifer C Richards, Matthew L Racine, Christopher M Hearon, Megan Kunkel, Gary J Luckasen, Dennis G Larson, Jason D Allen, Frank A Dinenno
Dietary nitrate (NO3-) is converted to nitrite (NO2-) and can be further reduced to the vasodilator nitric oxide (NO) amid a low O2 environment. Accordingly, dietary NO3- increases hind limb blood flow in rats during treadmill exercise; however, the evidence of such an effect in humans is unclear. We tested the hypothesis that acute dietary NO3- (via beetroot [BR] juice) increases forearm blood flow (FBF) via local vasodilation during handgrip exercise in young adults (n = 11; 25 ± 2 years). FBF (Doppler ultrasound) and blood pressure (Finapres) were measured at rest and during graded handgrip exercise at 5%, 15%, and 25% maximal voluntary contraction (MVC) lasting 4 min each...
January 2018: Physiological Reports
https://www.readbyqxmd.com/read/29378249/contrasting-effects-of-low-versus-high-ascorbate-doses-on-blood-pressure-responses-to-oral-nitrite-in-l-name-induced-hypertension
#5
Lucas C Pinheiro, Graziele C Ferreira, Kelvin H Vilalva, José C Toledo, Jose E Tanus-Santos
Nitrite reduces blood pressure (BP) in both clinical and experimental hypertension. This effect is attributable to the formation of nitric oxide (NO) and other NO-related species, which may be improved by ascorbate or other antioxidants. However, the BP responses to oral nitrite result, at least in part, of increased gastric S-nitrosothiol formation. This study tested the hypothesis that ascorbate may destroy S-nitrosothiols and therefore not all doses of ascorbate enhance the BP responses to oral nitrite. We assessed the BP responses to oral sodim nitrite (0...
January 25, 2018: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/29378248/effect-of-dietary-nitrate-levels-on-nitrate-fluxes-in-rat-skeletal-muscle-and-liver
#6
Cameron N Gilliard, Jeff K Lam, Katelyn S Cassel, Ji Won Park, Alan N Schechter, Barbora Piknova
Rodent skeletal muscle has high levels of nitrate ions and this endogenous nitrate reservoir can supply nitrite/nitric oxide (NO) for functional hyperemia and/or for other physiological processes in muscle during exercise. Mice with a NOS1 knockout have markedly reduced muscle nitrate levels, suggesting NO production by NOS and its reaction with oxymyoglobin as a source of nitrate. However, oxygen levels are normally low in most internal organs, which raises the possibility that nitrate-derived NO pathway is physiologically important even at "normoxia", and muscle nitrate reservoir is the main endogenous NO backup when exogeneous (dietary) nitrate intake is low...
January 26, 2018: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/29370244/acute-ingestion-of-beetroot-juice-increases-exhaled-nitric-oxide-in-healthy-individuals
#7
Juliet L Kroll, Chelsey A Werchan, David Rosenfield, Thomas Ritz
BACKGROUND AND OBJECTIVE: Nitric oxide (NO) plays an important role in the airways' innate immune response, and the fraction of exhaled NO at a flow rate of 50mL per second (FENO50) has been utilized to capture NO. Deficits in NO are linked to loss of bronchoprotective effects in airway challenges and predict symptoms of respiratory infection. While beetroot juice supplements have been proposed to enhance exercise performance by increasing dietary nitrate consumption, few studies have examined the impact of beetroot juice or nitrate supplementation on airway NO in contexts beyond an exercise challenge, which we know influences FENO50...
2018: PloS One
https://www.readbyqxmd.com/read/29368802/dietary-nitrate-induced-increases-in-human-muscle-power-high-versus-low-responders
#8
Andrew R Coggan, Seth R Broadstreet, Deana Mikhalkova, Indra Bole, Joshua L Leibowitz, Ana Kadkhodayan, Soo Park, Deepak P Thomas, Dakkota Thies, Linda R Peterson
Maximal neuromuscular power is an important determinant of athletic performance and also quality of life, independence, and perhaps even mortality in patient populations. We have shown that dietary nitrate (NO3- ), a source of nitric oxide (NO), improves muscle power in some, but not all, subjects. The present investigation was designed to identify factors contributing to this interindividual variability. Healthy men (n = 13) and women (n = 7) 22-79 year of age and weighing 52.1-114.9 kg were studied using a randomized, double-blind, placebo-controlled, crossover design...
January 2018: Physiological Reports
https://www.readbyqxmd.com/read/29360600/lowering-of-blood-pressure-after-nitrate-rich-vegetable-consumption-is-abolished-with-the-co-ingestion-of-thiocyanate-rich-vegetables-in-healthy-normotensive-males
#9
Rebecca Dewhurst-Trigg, Toby Yeates, Jamie R Blackwell, Christopher Thompson, Adam Linoby, Paul T Morgan, Ida Clarke, Luke J Connolly, Lee J Wylie, Paul G Winyard, Andrew M Jones, Stephen J Bailey
A diet rich in vegetables is known to provide cardioprotection. However, it is unclear how the consumption of different vegetables might interact to influence vascular health. This study tested the hypothesis that nitrate-rich vegetable consumption would lower systolic blood pressure but that this effect would be abolished when nitrate-rich and thiocyanate-rich vegetables are co-ingested. On four separate occasions, and in a randomised cross-over design, eleven healthy males reported to the laboratory and consumed a 750 mL vegetable smoothie that was either: low in nitrate (∼0...
January 19, 2018: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/29356948/effect-of-dietary-nitrate-supplementation-on-thermoregulatory-and-cardiovascular-responses-to-submaximal-cycling-in-the-heat
#10
Georgina L Kent, Brian Dawson, Gregory R Cox, Chris R Abbiss, Kurt J Smith, Kevin D Croft, Zi Xiang Lim, Annette Eastwood, Louise M Burke, Peter Peeling
PURPOSE: This study investigated whether reported improvements in blood flow distribution, and the possible related effects on thermoregulation during exercise following supplementation with beetroot juice (BR), a rich source of dietary nitrate (NO3-), are mitigated in the heat. METHODS: 12 male endurance-trained cyclists (age 27 ± 6 years, VO2peak 68.6 ± 8.1 ml kg-1 min-1) completed two 60 min submaximal cycling trials at 60% of VO2peak power output...
March 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29348109/review-beyond-conventional-therapies-complementary-and-alternative-medicine-in-the-management-of-hypertension-an-evidence-based-review
#11
Ang Peng Wong, Yaman Walid Kassab, Abdul Latiff Mohamed, Amelah Mohammed Abdul Qader
Hypertension is one of the major causes of morbidity and mortality. Worldwide, Hypertension is estimated to cause 7.5 million deaths, about 12.8% of the total of all deaths. This accounts for 57 million disability adjusted life years (DALYS) or 3.7% of total DALYS. This led WHO to set a target of 25% reduction in prevalence by 2025. To reach that, WHO has adopted non-conventional methods for the management of hypertension? Despite worldwide popularity of such non-conventional therapies, only small volume of evidence exists that supports its effectiveness...
January 2018: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29333377/dietary-l-arginine-intakes-and-the-risk-of-metabolic-syndrome-a-6-year-follow-up-in-tehran-lipid-and-glucose-study
#12
Parvin Mirmiran, Sajjad Khalili Moghadam, Zahra Bahadoran, Asghar Ghasemi, Fereidoun Azizi
This study was conducted to investigate whether regular dietary intake of L-arginine could affect the occurrence of metabolic syndrome (MetS). Eligible adult men and women (n=1,237), who participated in the Tehran Lipid and Glucose Study, were followed for a median of 6.3 years. Dietary intakes of L-arginine and serum nitrate and nitrite (NOx) concentration were assessed at baseline (2006~2008), and demographics, anthropometrics, and biochemical variables were evaluated at baseline and follow-up examinations...
December 2017: Preventive Nutrition and Food Science
https://www.readbyqxmd.com/read/29307111/inorganic-nitrate-alleviates-the-senescence-related-decline-in-liver-function
#13
Haifeng Wang, Lei Hu, Le Li, Xiaoshan Wu, Zhipeng Fan, Chunmei Zhang, Jinsong Wang, Jidong Jia, Songlin Wang
Senescence-related decline in liver function is a common complication in the elderly that can lead to impaired health in older individuals. Dietary nitrate supplements have physiological and therapeutic effects on organ function by nitrate (NO3-)-nitrite (NO2-)-nitric oxide (NO) pathway. However, the role of dietary nitrate on the senescence-related decline in liver function is unclear. The findings of the present study showed that nitrate levels in the serum and liver decreased, whereas the levels of alanine aminotransferase (ALT) and aspartate aminotransferase (AST) in serum increased in ageing mice...
January 3, 2018: Science China. Life Sciences
https://www.readbyqxmd.com/read/29304531/dietary-nitrate-supplementation-reduces-circulating-platelet-derived-extracellular-vesicles-in-coronary-artery-disease-patients-on-clopidogrel-therapy-a-randomised-double-blind-placebo-controlled-study
#14
Nicholas Burnley-Hall, Fairoz Abdul, Vitaliy Androshchuk, Keith Morris, Nick Ossei-Gerning, Richard Anderson, D Aled Rees, Philip E James
Extracellular vesicles (EVs) are implicated in the pathogenesis of cardiovascular disease (CVD). Specifically, platelet-derived EVs are highly pro-coagulant, promoting thrombin generation and fibrin clot formation. Nitrate supplementation exerts beneficial effects in CVD, via an increase in nitric oxide (NO) bioavailability. Clopidogrel is capable of producing NO-donating compounds, such as S-nitrosothiols (RSNO) in the presence of nitrite and low pH. The aim of this study was to assess the effect of nitrate supplementation with versus without clopidogrel therapy on circulating EVs in coronary artery disease (CAD) patients...
January 2018: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/29229321/the-role-of-aspirin-heparin-and-other-interventions-in-the-prevention-and-treatment-of-fetal-growth-restriction
#15
REVIEW
Katie M Groom, Anna L David
Fetal growth restriction and related placental pathologies such as preeclampsia, stillbirth, and placental abruption are believed to arise in early pregnancy when inadequate remodeling of the maternal spiral arteries leads to persistent high-resistance and low-flow uteroplacental circulation. The consequent placental ischaemia, reperfusion injury, and oxidative stress are associated with an imbalance in angiogenic/antiangiogenic factors. Many interventions have centered on the prevention and/or treatment of preeclampsia with results pertaining to fetal growth restriction and small-for-gestational-age pregnancy often included as secondary outcomes because of the common pathophysiology...
December 8, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29223585/influence-of-dietary-nitrate-food-forms-on-nitrate-metabolism-and-blood-pressure-in-healthy-normotensive-adults
#16
Sinead T J McDonagh, Lee J Wylie, James M A Webster, Anni Vanhatalo, Andrew M Jones
Inorganic nitrate (NO3-) supplementation has been shown to improve cardiovascular health indices in healthy adults. The purpose of this study was to investigate how the vehicle of NO3- administration can influence NO3- metabolism and the subsequent blood pressure response. Ten healthy males consumed an acute equimolar dose of NO3- (∼5.76 mmol) in the form of a concentrated beetroot juice drink (BR; 55 mL), a non-concentrated beetroot juice drink (BL; 456 mL) and a solid beetroot flapjack (BF; 60 g). A drink containing soluble beetroot crystals (BC; ∼1...
December 6, 2017: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/29211505/the-effect-of-dietary-nitrate-on-nocturnal-sleep-disordered-breathing-and-arterial-oxygen-desaturation-at-high-altitude
#17
Alexander Patrician, Harald Engan, David Lundsten, Ludger Grote, Helena Vigetun-Haughey, Erika Schagatay
Patrician, Alexander, Harald Engan, David Lundsten, Ludger Grote, Helena Vigetun-Haughey, and Erika Schagatay. The effect of dietary nitrate on nocturnal sleep-disordered breathing and arterial oxygen desaturation at high altitude. High Alt Med Biol 00:000-000, 2017.-Sleep-disordered breathing and fluctuations in arterial oxygen saturation (SaO2) are common during sleep among lowlanders ascending to high altitude. Dietary nitrate (NO3-) supplementation has been shown to lower the O2 consumption in various conditions...
December 6, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/29190751/acute-effect-of-dietary-nitrate-on-forearm-muscle-oxygenation-blood-volume-and-strength-in-older-adults-a-randomized-clinical-trial
#18
Gustavo Vieira de Oliveira, Marina Morgado, Carlos Adam Conte-Junior, Thiago Silveira Alvares
Both recovery time of post-exercise muscle oxygenation and muscle strength decline with aging. Although beetroot consumption has been shown to improve muscle oxygenation and exercise performance in adults, these effects in the elderly has not been addressed. The aim of the present study was to evaluate the effect of a beetroot-based gel (BG) on muscle O2 saturation, blood volume (tHb) and handgrip strength in the elderly in response to handgrip exercise. In a randomized crossover double-blind design, twelve older subjects consumed BG (100 g of beetroot-based gel containing ~ 12 mmol nitrate) or PLA (100 g of nitrate-depleted gel nitrate-depleted)...
2017: PloS One
https://www.readbyqxmd.com/read/29165355/acute-effects-of-nitrate-rich-beetroot-juice-on-blood-pressure-hemostasis-and-vascular-inflammation-markers-in-healthy-older-adults-a-randomized-placebo-controlled-crossover-study
#19
Kyle Raubenheimer, Danica Hickey, Michael Leveritt, Robert Fassett, Joaquin Ortiz de Zevallos Munoz, Jason D Allen, David Briskey, Tony J Parker, Graham Kerr, Jonathan M Peake, Natalie M Pecheniuk, Oliver Neubauer
Aging is associated with a vasoconstrictive, pro-coagulant, and pro-inflammatory profile of arteries and a decline in the bioavailability of the endothelium-derived molecule nitric oxide. Dietary nitrate elicits vasodilatory, anti-coagulant and anti-inflammatory effects in younger individuals, but little is known about whether these benefits are evident in older adults. We investigated the effects of 140 mL of nitrate-rich (HI-NI; containing 12.9 mmol nitrate) versus nitrate-depleted beetroot juice (LO-NI; containing ≤0...
November 22, 2017: Nutrients
https://www.readbyqxmd.com/read/29151027/plasma-nitrate-and-incidence-of-cardiovascular-disease-and-all-cause-mortality-in-the-community-the-framingham-offspring-study
#20
Renke Maas, Vanessa Xanthakis, Thomas Göen, Johannes Müller, Edzard Schwedhelm, Rainer H Böger, Ramachandran Vasan
BACKGROUND: Nitrate is a dietary component as well as an endogenously formed metabolite and source of the signaling molecule nitric oxide. Harmful as well as beneficial effects of nitrate have been advocated. Data regarding the prognostic relevance of plasma nitrate are limited. The aim of this study was to evaluate the prospective association of plasma nitrate with cardiovascular disease (CVD) and all-cause mortality. METHODS AND RESULTS: We assayed plasma nitrate in 2855 Framingham Offspring Study participants (mean age 59 years, 54% women) by gas chromatography-mass spectrometry and evaluated its association with all-cause mortality and incident CVD...
November 18, 2017: Journal of the American Heart Association
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