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Dietary nitrates

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https://www.readbyqxmd.com/read/29775547/acute-dietary-nitrate-supplementation-does-not-attenuate-oxidative-stress-or-the-hemodynamic-response-during-submaximal-exercise-in-hypobaric-hypoxia
#1
Colin R Carriker, Paige Rombach, Brooke M Stevens, Roger A Vaughan, Ann L Gibson
PURPOSE: To investigate changes in oxidative stress, arterial oxygen saturation (SaO2), blood pressure (BP), and heart rate (HR) while exercising in hypobaric hypoxia following acute dietary nitrate supplementation. METHODS: Nine well-trained (60.8±7.8 ml/kg/min) males (29±7 years) visited the lab on 3 occasions, each separated by 1 week. Visit 1 included a maximal aerobic cycling test (VO2max) and 5 five-minute increasing intensity exercise bouts in a normobaric environment (1600m)...
May 18, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29769113/thinking-beyond-opisthorchis-viverrini-for-risk-of-cholangiocarcinoma-in-the-lower-mekong-region-a-systematic-review-and-meta-analysis
#2
REVIEW
Jennifer A Steele, Carsten H Richter, Pierre Echaubard, Parichat Saenna, Virginia Stout, Paiboon Sithithaworn, Bruce A Wilcox
BACKGROUND: Cholangiocarcinoma (CCA) is a fatal bile duct cancer associated with infection by the liver fluke, Opisthorchis viverrini, in the lower Mekong region. Numerous public health interventions have focused on reducing exposure to O. viverrini, but incidence of CCA in the region remains high. While this may indicate the inefficacy of public health interventions due to complex social and cultural factors, it may further indicate other risk factors or interactions with the parasite are important in pathogenesis of CCA...
May 17, 2018: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/29766294/influence-of-dietary-nitrate-supplementation-on-local-sweating-and-cutaneous-vascular-responses-during-exercise-in-a-hot-environment
#3
Tatsuro Amano, Dai Okushima, Brynmor C Breese, Stephen J Bailey, Shunsaku Koga, Narihiko Kondo
PURPOSE: We investigated the influence of inorganic nitrate ([Formula: see text]) supplementation on local sweating and cutaneous vascular responses during exercise in hot conditions. METHOD: Eight healthy, young subjects were assigned in a randomized, double-blind, crossover design to receive [Formula: see text]-rich beetroot (BR) juice (140 mL/day, containing ~ 8 mmol of [Formula: see text]) and [Formula: see text]-depleted placebo (PL) juice (140 mL/day, containing ~ 0...
May 15, 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29763679/maternal-dietary-nitrate-intake-and-risk-of-neural-tube-defects-a-systematic-review-and-dose-response-meta-analysis
#4
REVIEW
Nader Rahimi Kakavandi, Amin Hasanvand, Mahmoud Ghazi-Khansari, Ahmad Habibian Sezavar, Hassan Nabizadeh, Mohammad Parohan
Despite growing evidence for the potential teratogenicity of nitrate, knowledge about the dose-response relationship of dietary nitrate intake and risk of specific birth defects such as neural tube defects (NTDs) is limited. Therefore, the aim of this meta-analysis was to synthesize the knowledge about the dose-response relation between maternal dietary nitrate intake and the risk of NTDs. We conducted a systematic search in PubMed, ISI Web of Science and Scopus up to February 2018 for observational studies...
May 12, 2018: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29758485/isolation-characterization-and-strain-selection-of-a-paenibacillus-species-for-use-as-a-probiotic-to-aid-in-ruminal-methane-mitigation-nitrate-nitrite-detoxification-and-food-safety
#5
Elizabeth A Latham, William E Pinchak, Julian Trachsel, Heather K Allen, Todd R Callaway, David J Nisbet, Robin C Anderson
The effects of dietary nitrate and Paenibacillus 79R4 (79R4), a denitrifying bacterium, when co-administered as a probiotic, on methane emissions, nitrate and nitrite-metabolizing capacity and fermentation characteristics were studied in vitro. Mixed populations of rumen microbes inoculated with 79R4 metabolized all levels of nitrite studied after 24 h in vitro incubation. Results from in vitro simulations resulted in up to 2 log10 colony forming unit reductions in E. coli O157:H7 and Campylobacter jejuni when these were co-cultured with 79R4...
April 30, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29745362/does-dietary-nitrate-say-no-to-cardiovascular-ageing-current-evidence-and-implications-for-research
#6
Mario Siervo, Filippo Scialò, Oliver M Shannon, Blossom C M Stephan, Ammar W Ashor
CVD are characterised by a multi-factorial pathogenesis. Key pathogenetic steps in the development of CVD are the occurrence of endothelial dysfunction and formation of atherosclerotic lesions. Reduced nitric oxide (NO) bioavailability is a primary event in the initiation of the atherosclerotic cascade. NO is a free radical with multiple physiological functions including the regulation of vascular resistance, coagulation, immunity and oxidative metabolism. The synthesis of NO proceeds via two distinct pathways identified as enzymatic and non-enzymatic...
May 2018: Proceedings of the Nutrition Society
https://www.readbyqxmd.com/read/29727405/nitrate-supplement-benefits-contractile-forces-in-fatigued-but-not-unfatigued-muscle
#7
Neale A Tillin, Sarah Moudy, Kirsty M Nourse, Christopher J Tyler
PURPOSE: Evidence suggests dietary nitrate supplementation enhances low-frequency (≤20 Hz) involuntary, but not voluntary, forces in unfatigued human muscle. We investigated the hypotheses that nitrate supplementation would also attenuate low-frequency fatigue and the loss of explosive-voluntary forces in fatigued conditions. METHODS: In a counterbalanced double-blinded order, 17 male participants completed two experimental trials following 7 days of dietary supplementation with either nitrate-rich (NIT) or nitrate-depleted (PLA) beetroot juice...
April 27, 2018: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29722627/effect-of-dietary-nitrate-supplementation-on-conduit-artery-blood-flow-muscle-oxygenation-and-metabolic-rate-during-handgrip-exercise
#8
Jesse C Craig, Ryan M Broxterman, Joshua R Smith, Jason David Allen, Thomas J Barstow
Dietary nitrate supplementation has positive effects on mitochondrial and muscle contractile efficiency during large muscle mass exercise in humans, and on skeletal muscle blood flow (Q̇) in rats. However, concurrent measurement of these effects has not been performed in humans. Therefore, we assessed the influence of nitrate supplementation on Q̇ and muscle oxygenation characteristics during moderate (40%peak) and severe (85%peak) intensity handgrip exercise in a randomized, double-blind, crossover-design...
May 3, 2018: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29694703/mechanisms-underlying-blood-pressure-reduction-by-dietary-inorganic-nitrate
#9
REVIEW
Mattias Carlström, Jon O Lundberg, Eddie Weitzberg
Nitric oxide (NO) importantly contributes to cardiovascular homeostasis by regulating blood flow and maintaining endothelial integrity. Conversely, reduced NO bioavailability is a central feature during natural aging and in many cardiovascular disorders, including hypertension. The inorganic anions nitrate and nitrite are endogenously formed after oxidation of NO synthase (NOS)-derived NO and are also present in our daily diet. Knowledge accumulated over the past two decades have demonstrated that these anions can be recycled back to NO and other bioactive nitrogen oxides via serial reductions that involve oral commensal bacteria and various enzymatic systems...
April 25, 2018: Acta Physiologica
https://www.readbyqxmd.com/read/29693564/cerebral-blood-flow-measurements-in-adults-a-review-on-the-effects-of-dietary-factors-and-exercise
#10
REVIEW
Peter J Joris, Ronald P Mensink, Tanja C Adam, Thomas T Liu
Improving cerebrovascular function may be a key mechanism whereby a healthy lifestyle, of which a healthy diet combined with increased physical activity levels is a cornerstone, protects against cognitive impairments. In this respect, effects on cerebral blood flow (CBF)—a sensitive physiological marker of cerebrovascular function—are of major interest. This review summarizes the impact of specific dietary determinants and physical exercise on CBF in adults and discusses the relation between these effects with potential changes in cognitive function...
April 25, 2018: Nutrients
https://www.readbyqxmd.com/read/29693429/ergogenic-effects-of-beetroot-juice-supplementation-during-severe-intensity-exercise-in-obese-adolescents
#11
Letizia Rasica, Simone Porcelli, Mauro Marzorati, Desy Salvadego, Alessandra Vezzoli, Fiorenza Agosti, Alessandra De Col, Gabriella Tringali, Andrew M Jones, Alessandro Sartorio, Bruno Grassi
Previous studies showed a higher O2 cost of exercise, and therefore a reduced exercise tolerance, in obese patients during constant work rate (CWR) exercise compared to healthy subjects. Among the ergogenic effects of dietary nitrate (NO3 -) supplementation in sedentary healthy subjects, a reduced O2 cost and enhanced exercise tolerance have often been demonstrated. The aim of this study was to evaluate the effects of beetroot juice supplementation, rich in NO3 -, on physiological variables associated with exercise tolerance in obese adolescents...
April 25, 2018: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29686927/an-ultrasound-assessed-extraction-combined-with-ion-pair-hplc-method-and-risk-assessment-of-nitrite-and-nitrate-in-cured-meat
#12
Babiker Yagoub Abdulkair, Amin O Elzupir, Abdulaziz S Alamer
An accurate IPC-UV method was developed and validated for the determination of nitrite (NI) and nitrate (NA) in meat products. The best separation was achieved on a phenyl-hexyl column (150 mm × 4.6 mm, 3  µ m) with a mobile phase composed of 25% acetonitrile and 75% buffer (2 mM disodium hydrogen phosphate and 3 mM tetrabutylammonium bromide, pH = 4). Eluents were monitored at 205 nm. Linearity ranges were 1.86 × 10-6 -7.5  µ g·ml-1 and 0.09-5.0  µ g·ml-1 for NI and NA, respectively...
2018: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/29660828/storage-stability-of-dietary-nitrate-and-phenolic-compounds-in-beetroot-beta-vulgaris-and-arugula-eruca-sativa-juices
#13
Karen A Corleto, Jashbir Singh, G K Jayaprakasha, Bhimanagouda S Patil
Nitrate and polyphenols from the diet may enhance the production and bioavailability of nitric oxide, a radical signaling molecule critical for cardiovascular health. Understanding the stability of these bioactives in beetroot and arugula juices is important for their functions. In this study, the stability of nitrate and phenolics in beetroot and arugula juices was measured for 32 days at different temperatures (25, 4, -20, and -80 °C). The levels of nitrate were measured by reversed-phase HPLC and initial levels were found to be 4965...
April 16, 2018: Journal of Food Science
https://www.readbyqxmd.com/read/29628462/-long-term-dietary-nitrite-and-nitrate-deficiency-causes-metabolic-syndrome-endothelial-dysfunction-and-cardiovascular-death-in-mice
#14
Mika Kina-Tanada, Mayuko Sakanashi, Akira Arasaki, Masato Tsutsui
Nitric oxide (NO) is synthesized not only from L-arginine by NO synthases (NOSs), but also from its inert metabolites, nitrite and nitrate. Green leafy vegetables are abundant in nitrate, however whether or not a deficiency in dietary nitrite/nitrate spontaneously causes disease remains to be clarified. In this study, we tested our hypothesis that long-term dietary nitrite/nitrate deficiency induces metabolic syndrome (MetS) in mice. To this end, we prepared a low nitrite/nitrate diet (LND) consisting of an amino acid-based low nitrite/nitrate chow in which the contents of L-arginine, fat, carbohydrates, protein, and energy were identical with a regular chow, and potable ultrapure water...
2018: Nihon Yakurigaku Zasshi. Folia Pharmacologica Japonica
https://www.readbyqxmd.com/read/29625952/effects-of-dietary-inorganic-nitrate-supplementation-on-exercise-performance-in-patients-with-heart-failure-protocol-for-a-randomized-placebo-controlled-cross-over-trial
#15
Mary N Woessner, Itamar Levinger, Christopher Neil, Cassandra Smith, Jason D Allen
BACKGROUND: Chronic heart failure is characterized by an inability of the heart to pump enough blood to meet the demands of the body, resulting in the hallmark symptom of exercise intolerance. Chronic underperfusion of the peripheral tissues and impaired nitric oxide bioavailability have been implicated as contributors to the decrease in exercise capacity in these patients. nitric oxide bioavailability has been identified as an important mediator of exercise tolerance in healthy individuals, but there are limited studies examining the effects in patients with chronic heart failure...
April 6, 2018: JMIR Research Protocols
https://www.readbyqxmd.com/read/29606168/temperament-and-dominance-relate-to-feeding-behaviour-and-activity-in-beef-cattle-implications-for-performance-and-methane-emissions
#16
P Llonch, M Somarriba, C A Duthie, S Troy, R Roehe, J Rooke, M J Haskell, S P Turner
In beef cattle, feeding behaviour and activity are associated with feed efficiency and methane (CH4) emissions. This study aimed to understand the underlying traits responsible for the contribution of cattle behaviour to individual differences in feed efficiency, performance and CH4 emissions. A total of 84 steers (530±114 kg BW) of two different breeds (crossbreed Charolais and Luing) were used. The experiment was a 2×2×3 factorial design with breed, basal diets (concentrate v. mixed) and dietary treatments (no additive, calcium nitrate or rapeseed cake) as the main factors...
April 2, 2018: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/29589768/ioc-consensus-statement-dietary-supplements-and-the-high-performance-athlete
#17
Ronald J Maughan, Louise M Burke, Jiri Dvorak, D Enette Larson-Meyer, Peter Peeling, Stuart M Phillips, Eric S Rawson, Neil P Walsh, Ina Garthe, Hans Geyer, Romain Meeusen, Luc van Loon, Susan M Shirreffs, Lawrence L Spriet, Mark Stuart, Alan Vernec, Kevin Currell, Vidya M Ali, Richard G M Budgett, Arne Ljungqvist, Margo Mountjoy, Yannis Pitsiladis, Torbjørn Soligard, Uğur Erdener, Lars Engebretsen
Nutrition usually makes a small but potentially valuable contribution to successful performance in elite athletes, and dietary supplements can make a minor contribution to this nutrition program. Nonetheless, supplement use is widespread at all levels of sport. Products described as supplements target different issues, including the management of micronutrient deficiencies, supply of convenient forms of energy and macronutrients, and provision of direct benefits to performance or indirect benefits such as supporting intense training regimens...
March 28, 2018: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29588164/nitrated-fatty-acids-in-cardiovascular-diseases
#18
REVIEW
Martin Mollenhauer, Dennis Mehrkens, Volker Rudolph
Cardiovascular disease (CVD) is the leading cause of death and accounts for one third of disease-related mortality worldwide. Dysregulated redox mechanisms, in particular the formation of reactive oxygen species (ROS) play a pivotal pathogenetic role in CVD. Nitro-fatty acids (NO2 -FAs) are electrophilic molecules which have a NO2 -group bound to one of their olefinic carbons. They are endogenously formed by the reaction of reactive nitrogen species with unsaturated fatty acids. Basal levels of NO2 -FAs are in the low nanomolar range and higher concentrations can be encountered under acidic (stomach) and inflammatory (e...
March 24, 2018: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/29576063/review-on-the-significance-of-chlorine-for-crop-yield-and-quality
#19
REVIEW
Christoph-Martin Geilfus
The chloride concentration in the plant determines yield and quality formation for two reasons. First, chlorine is a mineral nutrient and deficiencies thereof induce metabolic problems that interfere with growth. However, due to low requirement of most crops, deficiency of chloride hardly appears in the field. Second, excess of chloride, an event that occurs under chloride-salinity, results in severe physiological dysfunctions impairing both quality and yield formation. The chloride ion can effect quality of plant-based products by conferring a salty taste that decreases market appeal of e...
May 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29559721/increasing-vegetable-intake-to-obtain-the-health-promoting-and-ergogenic-effects-of-dietary-nitrate
#20
REVIEW
Cindy M T Van der Avoort, Luc J C Van Loon, Maria T E Hopman, Lex B Verdijk
Increased consumption of dietary nitrate increases plasma nitrate and nitrite concentrations, and has been shown to elicit cardio-protective effects and improve exercise performance. Nitrate consumption in the habitual diet is mainly dependent on nitrate-rich vegetables, such as green leafy and root vegetables, with total vegetable consumption accounting for approximately 50-85% of our daily nitrate intake. Whereas 'supplementation' with dietary nitrate in research studies has mainly been accomplished through the use of (concentrated) nitrate-rich beetroot juice, dietary strategies focusing on increased intake of nitrate-rich vegetables may represent a similarly effective alternative for increasing dietary nitrate intake and, as such, obtaining the associated cardiovascular health and ergogenic benefits...
March 20, 2018: European Journal of Clinical Nutrition
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