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Dietary nitrates

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https://www.readbyqxmd.com/read/28087899/increasing-dietary-nitrate-has-no-effect-on-cancellous-bone-loss-or-fecal-microbiome-in-ovariectomized-rats
#1
Melissa N Conley, Cooper Roberts, Thomas J Sharpton, Urszula T Iwaniec, Norman Hord
Studies suggest diets rich in fruit and vegetables reduce bone loss, although the specific compounds responsible are unknown. Substrates for endogenous nitric oxide (NO) production, including organic nitrates and dietary nitrate, may support NO production in age-related conditions, including osteoporosis. We investigated the capability of dietary nitrate to improve NO bioavailability, reduce bone turnover and loss. Six-month-old Sprague Dawley rats [30 ovariectomized (OVX) and 10 sham-operated (sham)] were randomized into 3 groups: (1) vehicle (water) control, (2) low-dose nitrate (LDN, 0...
January 13, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28057862/antiinflammatory-actions-of-inorganic-nitrate-stabilize-the-atherosclerotic-plaque
#2
Rayomand S Khambata, Suborno M Ghosh, Krishnaraj S Rathod, Tharssana Thevathasan, Federica Filomena, Qingzhong Xiao, Amrita Ahluwalia
Reduced bioavailable nitric oxide (NO) plays a key role in the enhanced leukocyte recruitment reflective of systemic inflammation thought to precede and underlie atherosclerotic plaque formation and instability. Recent evidence demonstrates that inorganic nitrate (NO3(-)) through sequential chemical reduction in vivo provides a source of NO that exerts beneficial effects upon the cardiovascular system, including reductions in inflammatory responses. We tested whether the antiinflammatory effects of inorganic nitrate might prove useful in ameliorating atherosclerotic disease in Apolipoprotein (Apo)E knockout (KO) mice...
January 5, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28050806/nitrate-rich-beetroot-juice-selectively-lowers-ambulatory-pressures-and-ldl-cholesterol-in-uncontrolled-but-not-controlled-hypertension-a-pilot-study
#3
C P Kerley, E Dolan, L Cormican
BACKGROUND: Dietary nitrate has been shown to increase nitrate/nitrite levels in multiple populations, with potential blood pressure lowering effects. However, there are few reports among hypertensives. AIMS: We aimed to assess the effect of daily nitrate in subjects with controlled hypertension vs. uncontrolled hypertension. METHODS: On day 0, hypertensives wore an ambulatory BP monitor (ABPM) for 24 h and fasting blood was taken. Subjects then consumed concentrated beetroot juice (12...
January 3, 2017: Irish Journal of Medical Science
https://www.readbyqxmd.com/read/28046156/feed-intake-growth-and-body-and-carcass-attributes-of-feedlot-steers-supplemented-with-two-levels-of-calcium-nitrate-or-urea
#4
R S Hegarty, J Miller, N Oelbrandt, L Li, J P M Luijben, D L Robinson, J V Nolan, H B Perdok
Nitrate supplementation has been shown to be effective in reducing enteric methane emission from ruminants, but there have been few large-scale studies assessing the effects of level of nitrate supplementation on feed intake, animal growth, or carcass and meat quality attributes of beef cattle. A feedlot study was conducted to assess the effects of supplementing 0.25 or 0.45% NPN in dietary DM as either urea (Ur) or calcium nitrate (CaN) on DMI, ADG, G:F, and carcass attributes of feedlot steers ( = 383). The levels of NPN inclusion were selected as those at which nitrate has previously achieved measurable mitigation of enteric methane...
December 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/28042082/beetroot-juice-versus-chard-gel-a-pharmacokinetic-and-pharmacodynamic-comparison-of-nitrate-bioavailability
#5
Luke C McIlvenna, Chris Monaghan, Luke Liddle, Bernadette O Fernandez, Martin Feelisch, David J Muggeridge, Chris Easton
Dietary supplementation with inorganic nitrate (NO3(-)) has been shown to induce a multitude of advantageous cardiovascular and metabolic responses during rest and exercise. While there is some suggestion that pharmacokinetics may differ depending on the NO3(-) source ingested, to the best of our knowledge this has yet to be determined experimentally. Here, we compare the plasma pharmacokinetics of NO3(-), nitrite (NO2(-)), and total nitroso species (RXNO) following oral ingestion of either NO3(-) rich beetroot juice (BR) or chard gels (GEL) with the associated changes in blood pressure (BP)...
December 29, 2016: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/28040196/aquatic-concentrations-of-chemical-analytes-compared-to-ecotoxicity-estimates
#6
Mitchell S Kostich, Robert W Flick, Angela L Batt, Heath E Mash, J Scott Boone, Edward T Furlong, Dana W Kolpin, Susan T Glassmeyer
We describe screening level estimates of potential aquatic toxicity posed by 227 chemical analytes that were measured in 25 ambient water samples collected as part of a joint USGS/USEPA drinking water plant study. Measured concentrations were compared to biological effect concentration (EC) estimates, including USEPA aquatic life criteria, effective plasma concentrations of pharmaceuticals, published toxicity data summarized in the USEPA ECOTOX database, and chemical structure-based predictions. Potential dietary exposures were estimated using a generic 3-tiered food web accumulation scenario...
February 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28024935/influence-of-iodide-ingestion-on-nitrate-metabolism-and-blood-pressure-following-short-term-dietary-nitrate-supplementation-in-healthy-normotensive-adults
#7
Stephen J Bailey, Jamie R Blackwell, Lee J Wylie, Annabelle Emery, Ellie Taylor, Paul G Winyard, Andrew M Jones
Uptake of inorganic nitrate (NO3(-)) into the salivary circulation is a rate-limiting step for dietary NO3(-) metabolism in mammals. It has been suggested that salivary NO3(-) uptake occurs in competition with inorganic iodide (I(-)). Therefore, this study tested the hypothesis that I(-) supplementation would interfere with NO3(-) metabolism and blunt blood pressure reductions after dietary NO3(-) supplementation. Nine healthy adults (4 male, mean ± SD, age 20 ± 1 yr) reported to the laboratory for initial baseline assessment (control) and following six day supplementation periods with 140 mL·day(-1) NO3(-)-rich beetroot juice (8...
December 23, 2016: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/28009811/association-between-dietary-intakes-of-nitrate-and-nitrite-and-the-risk-of-hypertension-and-chronic-kidney-disease-tehran-lipid-and-glucose-study
#8
Zahra Bahadoran, Parvin Mirmiran, Asghar Ghasemi, Mattias Carlström, Fereidoun Azizi, Farzad Hadaegh
BACKGROUND AND AIM: The association of habitual intakes of dietary nitrate (NO₃(-)) and nitrite (NO₂(-)) with blood pressure and renal function is not clear. Here, we investigated a potential effect of dietary NO₃(-) and NO₂(-) on the occurrence of hypertension (HTN) and chronic kidney disease (CKD). METHODS: A total of 2799 Iranian adults aged ≥20 years, participating in the Tehran Lipid and Glucose Study (TLGS), were included and followed for a median of 5...
December 21, 2016: Nutrients
https://www.readbyqxmd.com/read/27997263/dietary-nitrate-fails-to-improve-1-and-4km-cycling-performance-in-highly-trained-cyclists
#9
Joseph A McQuillan, Deborah K Dulson, Paul B Laursen, Andrew E Kilding
We aimed to compare the effects of two different dosing durations of dietary nitrate (NO3-) supplementation on 1- and 4km cycling time-trial performance in highly-trained cyclists. In a double-blind crossover-design, nine highly-trained cyclists ingested 140ml of NO3--rich beetroot juice containing ~8.0mmol [NO3-], or placebo, for seven days. Participants completed a range of laboratory-based trials to quantify physiological and perceptual responses and cycling performance: time-trials on day 3 and 6 (4km) and on day 4 and 7 (1km) of the supplementation period...
December 20, 2016: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/27989963/tuning-constitutive-and-pathological-inflammation-in-the-gut-via-the-interaction-of-dietary-nitrate-and-polyphenols-with-host-microbiome
#10
Bárbara Rocha, Carla Nunes, João Laranjinha
Chronic inflammation is currently recognized as a critical process in modern-era epidemics such as diabetes, obesity and neurodegeneration. However, little attention is paid to the constitutive inflammatory pathways that operate in the gut and that are mandatory for local welfare and the prevention of such multi-organic diseases. Hence, the digestive system, while posing as a barrier between the external environment and the host, is crucial for the balance between constitutive and pathological inflammatory events...
October 28, 2016: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/27989792/enterosalivary-nitrate-metabolism-and-the-microbiome-intersection-of-microbial-metabolism-nitric-oxide-and-diet-in-cardiac-and-pulmonary-vascular-health
#11
REVIEW
Carl D Koch, Mark T Gladwin, Bruce A Freeman, Jon O Lundberg, Eddie Weitzberg, Alison Morris
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...
December 16, 2016: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/27916563/vitamin-c-intake-modify-the-impact-of-dietary-nitrite-on-the-incidence-of-type-2-diabetes-a-6-year-follow-up-in-tehran-lipid-and-glucose-study
#12
Zahra Bahadoran, Parvin Mirmiran, Asghar Ghasemi, Mattias Carlström, Fereidoun Azizi, Farzad Hadaegh
BACKGROUND: There is no epidemiological study on the association between dietary nitrate (NO3) and nitrite (NO2) and intakes and the risk of type 2 diabetes (T2D). OBJECTIVE: The aim of this study was therefore to examine the potential effect of dietary NO3 and NO2 on the occurrence of T2D. DESIGN: This longitudinal study was conducted within the framework of the Tehran Lipid and Glucose Study (TLGS) on 2139 T2D-free adults, aged 20-70 years, followed for a median of 5...
January 30, 2017: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/27909231/influence-of-dietary-nitrate-supplementation-on-physiological-and-muscle-metabolic-adaptations-to-sprint-interval-training
#13
Christopher Thompson, Lee J Wylie, Jamie R Blackwell, Jonathan Fulford, Matthew I Black, James Kelly, Sinead T J McDonagh, James Carter, Stephen J Bailey, Anni Vanhatalo, Andrew M Jones
We hypothesized that 4 weeks of dietary nitrate supplementation would enhance exercise performance and muscle metabolic adaptations to sprint interval training (SIT). Thirty six recreationally-active subjects, matched on key variables at baseline, completed a series of exercise tests before and following a 4 week period in which they were allocated to one of the following groups: 1) SIT and NO3(-)-depleted beetroot juice as a placebo (SIT+PL); 2) SIT and NO3(-)-rich beetroot juice (~13mmol NO3(-)/day; SIT+BR); or 3) no training and NO3(-)-rich beetroot juice (NT+BR)...
December 1, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/27907839/influence-of-picolinic-acid-on-seizure-susceptibility-in-mice
#14
Anna Cioczek-Czuczwar, Piotr Czuczwar, Waldemar Andrzej Turski, Jolanta Parada-Turska
BACKGROUND: The mechanism of drug resistance in epilepsy remains unknown. Picolinic acid (PIC) is an endogenous metabolite of the kynurenine pathway and a chelating agent added to dietary supplements. Both inhibitory and excitatory properties of PIC were reported. The aim of this study was to determine the influence of exogenously applied PIC upon the electroconvulsive threshold and the activity of chemical convulsants in eight models of epilepsy in mice. METHODS: All experiments were performed on adult male Swiss albino mice...
February 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/27898774/effects-of-feeding-encapsulated-nitrate-to-beef-cattle-on-ammonia-and-greenhouse-gas-emissions-from-their-manure-in-a-short-term-manure-storage-system
#15
Chanhee Lee, Rafael C Araujo, Karen M Koenig, Michael L Hile, Eileen E Fabian-Wheeler, Karen A Beauchemin
A study was conducted to investigate effects of feeding encapsulated nitrate (EN) to beef cattle on ammonia (NH) and greenhouse gas emissions from their manure. Eight beef heifers were randomly assigned to diets containing 0 (control), 1, 2, or 3% EN (55% forage dry matter; EN replaced encapsulated urea in the control diet and therefore all diets were iso-nitrogenous) in a replicated 4 × 4 Latin square design. Urine and feces collected from individual animals were reconstituted into manure and incubated over 156 h using a steady-state flux chamber system to monitor NH, methane (CH), carbon dioxide (CO), and nitrous oxide (NO) emissions...
November 2016: Journal of Environmental Quality
https://www.readbyqxmd.com/read/27890482/dietary-nitrate-does-not-affect-physical-activity-or-outcomes-in-healthy-older-adults-in-a-randomized-cross-over-trial
#16
Mario Siervo, Clio Oggioni, Djordje G Jakovljevic, Michael Trenell, John C Mathers, David Houghton, Carlos Celis-Morales, Ammar W Ashor, Alan Ruddock, Mayur Ranchordas, Markos Klonizakis, Elizabeth A Williams
Although dietary nitrate (NO3(-)) ingestion appears to enhance exercise capacity and performance in young individuals, inconclusive findings have been reported in older people. Therefore, we conducted a double-blind, crossover randomized clinical trial using beetroot juice in older healthy participants, who were classified as normal weight and overweight. We tested whether consumption of beetroot juice (a rich source of NO3(-)) for 1 week would increase nitric oxide bioavailability via the nonenzymatic pathway and enhance (1) exercise capacity during an incremental exercise test, (2) physical capability, and (3) free-living physical activity...
December 2016: Nutrition Research
https://www.readbyqxmd.com/read/27849257/effects-of-nitrate-intake-on-myocardial-ischemia-reperfusion-injury-in-diabetic-rats
#17
Sajad Jeddi, Saeedeh Khalifi, Mahboubeh Ghanbari, Fatemeh Bageripour, Asghar Ghasemi
BACKGROUND: Coronary artery disease is 2-3 times more common in diabetic individuals. Dietary nitrate/nitrite has beneficial effects in both diabetes and cardiovascular disease. It also has protective effects against myocardial ischemia-reperfusion (IR) injury in healthy animals. However, the effects of nitrate on myocardial IR injury in diabetic rats have not yet been investigated. OBJECTIVE: We examined the effects of dietary nitrate on myocardial IR injury in streptozotocin-nicotinamide-induced diabetic rats...
October 2016: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/27829985/potential-therapeutic-strategies-for-hypertension-exacerbated-cardiotoxicity-of-anticancer-drugs
#18
REVIEW
Robin K Kuriakose, Rakesh C Kukreja, Lei Xi
Despite their recognized cardiotoxic effects, anthracyclines remain an essential component in many anticancer regimens due to their superior antitumor efficacy. Epidemiologic data revealed that about one-third of cancer patients have hypertension, which is the most common comorbidity in cancer registries. The purpose of this review is to assess whether anthracycline chemotherapy exacerbates cardiotoxicity in patients with hypertension. A link between hypertension comorbidity and anthracycline-induced cardiotoxicity (AIC) was first suggested in 1979...
2016: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/27822169/the-effect-of-six-days-of-dietary-nitrate-supplementation-on-performance-in-trained-crossfit-athletes
#19
Samuel J Kramer, Daniel A Baur, Maria T Spicer, Matthew D Vukovich, Michael J Ormsbee
BACKGROUND: While it is well established that dietary nitrate reduces the metabolic cost of exercise, recent evidence suggests this effect is maintained 24 h following the final nitrate dose when plasma nitrite levels have returned to baseline. In addition, acute dietary nitrate was recently reported to enhance peak power production. Our purpose was to examine whether chronic dietary nitrate supplementation enhanced peak power 24 h following the final dose and if this impacted performance in a heavily power-dependent sport...
2016: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/27810735/profound-differences-between-humans-and-rodents-in-the-ability-to-concentrate-salivary-nitrate-implications-for-translational-research
#20
Marcelo F Montenegro, Michaela L Sundqvist, Carina Nihlén, Michael Hezel, Mattias Carlström, Eddie Weitzberg, Jon O Lundberg
In humans dietary circulating nitrate accumulates rapidly in saliva through active transport in the salivary glands. By this mechanism resulting salivary nitrate concentrations are 10-20 times higher than in plasma. In the oral cavity nitrate is reduced by commensal bacteria to nitrite, which is subsequently swallowed and further metabolized to nitric oxide (NO) and other bioactive nitrogen oxides in blood and tissues. This entero-salivary circulation of nitrate is central in the various NO-like effects observed after ingestion of inorganic nitrate...
October 25, 2016: Redox Biology
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