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Sodium nitrite

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https://www.readbyqxmd.com/read/28547728/the-protective-effect-of-a-novel-antioxidant-gene-from-mycobacterium-avium-against-nitrosative-and-oxidative-stress-in-e-coli
#1
Shiyi He, Aiyan Wang, Xueping Ning, Dongjun Yang, Min Ling
The production of reactive oxygen intermediates (ROI) and reactive nitrogen intermediates (RNI) is an important host defense mechanism in response to infection by Mycobacterium tuberculosis. A variety of genes have been implicated in resistance to ROI and RNI, including noxR1. However, studies in Mycobacterium avium, an important pathogen among nontuberculous mycobacteria, are limited. We aim to investigate the role of a novel gene cloned from M. avium with high similarity to noxR1, noA, in resistance against RNI and ROI in M...
June 2017: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28531997/sustained-release-of-growth-hormone-and-sodium-nitrite-from-biomimetic-collagen-coating-immobilized-on-silicone-tubes-improves-endothelialization
#2
Nasim Salehi-Nik, Zahra Malaie-Balasi, Ghassem Amoabediny, Seyedeh Parnian Banikarimi, Behrouz Zandieh-Doulabi, Jenneke Klein-Nulend
Biocompatibility of biomedical devices can be improved by endothelialization of blood-contacting parts mimicking the vascular endothelium's function. Improved endothelialization might be obtained by using biomimetic coatings that allow local sustained release of biologically active molecules, e.g. anti-thrombotic and growth-inducing agents, from nanoliposomes. We aimed to test whether incorporation of growth-inducing nanoliposomal growth hormone (nGH) and anti-thrombotic nanoliposomal sodium nitrite (nNitrite) into collagen coating of silicone tubes enhances endothelialization by stimulating endothelial cell proliferation and inhibiting platelet adhesion...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28527368/effects-of-parsley-extract-powder-as-an-alternative-for-the-direct-addition-of-sodium-nitrite-in-the-production-of-mortadella-type-sausages-impact-on-microbiological-physicochemical-and-sensory-aspects
#3
Greta Riel, Annika Boulaaba, Johanna Popp, Guenter Klein
Increasing concern about chemical additives in processed meat has led to an increased market of uncured and alternatively cured meat products. However, the use of vegetable extracts or the exclusion of curing salt may increase the risk of greater bacterial growth and alteration of several physicochemical parameters. Therefore, in this study mortadella-type sausages, manufactured with 1.07 (V3), 2.14 (V4) and 4.29 (V5) g parsley extract powder/kg sausage meat were produced. These sausage variants were compared to an uncured (V2) and a traditionally nitrite-cured control (V1)...
May 12, 2017: Meat Science
https://www.readbyqxmd.com/read/28513067/interventions-for-cutaneous-molluscum-contagiosum
#4
REVIEW
Johannes C van der Wouden, Renske van der Sande, Emma J Kruithof, Annet Sollie, Lisette Wa van Suijlekom-Smit, Sander Koning
BACKGROUND: Molluscum contagiosum is a common skin infection that is caused by a pox virus and occurs mainly in children. The infection usually resolves within months in people without immune deficiency, but treatment may be preferred for social and cosmetic reasons or to avoid spreading the infection. A clear evidence base supporting the various treatments is lacking.This is an update of a Cochrane Review first published in 2006, and updated previously in 2009. OBJECTIVES: To assess the effects of specific treatments and management strategies, including waiting for natural resolution, for cutaneous, non-genital molluscum contagiosum in people without immune deficiency...
May 17, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28510595/structural-adaptations-of-octaheme-nitrite-reductases-from-haloalkaliphilic-thioalkalivibrio-bacteria-to-alkaline-ph-and-high-salinity
#5
Anna Popinako, Mikhail Antonov, Alexey Tikhonov, Tamara Tikhonova, Vladimir Popov
Bacteria Tv. nitratireducens and Tv. paradoxus from soda lakes grow optimally in sodium carbonate/NaCl brines at pH range from 9.5 to 10 and salinity from 0.5 to 1.5 M Na+. Octaheme nitrite reductases (ONRs) from haloalkaliphilic bacteria of genus Thioalkalivibrio are stable and active in a wide range of pH (up to 11) and salinity (up to 1 M NaCl). To establish adaptation mechanisms of ONRs from haloalkaliphilic bacteria a comparative analysis of amino acid sequences and structures of ONRs from haloalkaliphilic bacteria and their homologues from non-halophilic neutrophilic bacteria was performed...
2017: PloS One
https://www.readbyqxmd.com/read/28495542/endothelial-function-is-preserved-in-veins-harvested-by-either-endoscopic-or-surgical-techniques
#6
Adam R Wheeler, Daniel E Kendrick, Matt T Allemang, Andre F Gosling, Ann H Kim, Alfred Hausladen, Vikram S Kashyap
OBJECTIVES: Endoscopic vein harvest for lower extremity arterial bypass grafting has been questioned due to concern for endothelial damage during procurement. We sought to compare Nitric Oxide (NO)-mediated endothelial dependent relaxation (EDR) in vein segments harvested using open surgical (OH) versus endoscopic (EH) techniques. METHODS: Saphenous vein segments were harvested for lower extremity bypass, and a single, minimally handled section of saphenous vein, free of branches, was taken from the end of the graft...
May 8, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28495515/renal-protective-effects-of-thymoquinone-against-sodium-nitrite-induced-chronic-toxicity-in-rats-impact-on-inflammation-and-apoptosis
#7
Nehal M Elsherbiny, Nadia M Maysarah, Mohamed El-Sherbiny, Mohamed M Al-Gayyar
AIMS: Sodium nitrite is a widely used color fixative and preservative. However, it has been reported to exert deleterious toxic effects on various body organs. Moreover, thymoquinone (TQ), the active constituent of Nigella sativa oil is known to possess beneficial antioxidant and anti-inflammatory effects. The present study was conducted to evaluate the potential protective effects of TQ against sodium nitrite-induced renal toxicity. MAIN METHODS: Male Sprague-Dawley rats were treated with sodium nitrite (80mg/kg, po, daily) in presence or absence of TQ (25 and 50mg/kg, po, daily)...
May 8, 2017: Life Sciences
https://www.readbyqxmd.com/read/28490529/effect-of-sodium-nitrite-on-renal-function-sodium-and-water-excretion-and-brachial-and-central-blood-pressure-in-healthy-subjects-a-dose-response-study
#8
Jeppe Bakkestroem Rosenbaek, Safa Al Therwani, Janni Majgaard Jensen, Frank Holden Mose, Christine Wandall-Frostholm, Erling Bjerregaard Pedersen, Jesper Noergaard Bech
Sodium nitrite (NaNO2) is converted to nitric oxide (NO) in vivo and has vasodilatory and natriuretic effects. Our aim was to examine the effects of NaNO2 on hemodynamics, sodium excretion and GFR. In a single-blinded, placebo-controlled, cross-over study, we infused placebo (0.9% NaCl) or 0.58, 1.74, or 3.48 μmol NaNO2/kg/hour for two hours in twelve healthy subjects, after four days standard diet. Subjects were supine and water-loaded. We measured brachial and central blood pressure (BP), plasma concentrations of renin, angiotensin II, aldosterone, arginine vasopressin (P-AVP), and plasma nitrite (P-NO2(-)), GFR by Cr-EDTA clearance, fractional excretion of sodium (FENa) free water clearance (CH2O), and urinary excretion rate of guanosine 3',5'-cyclic monophosphate (U-cGMP)...
May 10, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28475392/is-nitric-oxide-an-essential-mediator-in-cervical-inflammation-and-preterm-birth
#9
Christopher Nold, Julie Stone, Maura Graham, Jennifer Trinh, Alex Blanchette, Todd Jensen
OBJECTIVE: Cervical ripening is an obligatory step in the process of preterm birth. We hypothesize an inflammatory challenge to the cervix leads to an increase in nitric oxide production disrupting the cervical epithelial barrier leading to preterm birth. STUDY DESIGN: For this study, three experiments were performed: (1) Using a mouse model, pregnant mice were treated with an intrauterine injection of saline or lipopolysaccharide (LPS). Mice were sacrificed and cervices were collected for molecular analysis...
May 5, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28470424/nitrogen-transformation-under-different-dissolved-oxygen-levels-by-the-anoxygenic-phototrophic-bacterium-marichromatium-gracile
#10
Xuan Hong, Zhongwei Chen, Chungui Zhao, Suping Yang
Marichromatium gracile: YL28 (M. gracile YL28) is an anoxygenic phototrophic bacterial strain that utilizes ammonia, nitrate, or nitrite as its sole nitrogen source during growth. In this study, we investigated the removal and transformation of ammonium, nitrate, and nitrite by M. gracile YL28 grown in a combinatorial culture system of sodium acetate-ammonium, sodium acetate-nitrate and sodium acetate-nitrite in response to different initial dissolved oxygen (DO) levels. In the sodium acetate-ammonium system under aerobic conditions (initial DO = 7...
June 2017: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28467183/synergistic-effect-of-plantaricin-bm-1-combined-with-physicochemical-treatments-on-the-control-of-listeria-monocytogenes-in-cooked-ham
#11
Siqi Wu, Hongxing Zhang, Huimin Zhou, Junhua Jin, Yuanhong Xie
Plantaricin BM-1, a typical IIa bacteriocin, is produced by Lactobacillus plantarum BM-1, which can be isolated from a traditionally fermented Chinese meat product. This bacteriocin exhibits perfect thermal stability and broad inhibitory activity against certain foodborne pathogens. In this study, we investigated the effect of plantaricin BM-1 combined with physicochemical treatments (sodium nitrite, heat treatment, ultrahigh pressure technology) on the control of Listeria monocytogenes populations in cooked ham...
May 3, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28448172/the-macrophage-stimulating-anti-cancer-agent-rrx-001-protects-against-ischemia-reperfusion-injury
#12
Pedro Cabrales, Scott Caroen, Arnold Oronsky, Corey Carter, Jane Trepel, Thomas Summers, Tony Reid, Neil Oronsky, Michelle Lybeck, Bryan Oronsky
Introduction RRx-001, a clinical macrophage-stimulating anti-cancer agent that also produces nitric oxide (NO) was studied in a model of ischemia-reperfusion injury. Methods The production of NO is dependent on the oxygen tension because nitric oxide synthases convert l-arginine to NO and l-citrulline in the presence of O2. Since the P450 enzymes, which metabolize nitrate esters such as nitroglycerin are dependent on oxygen, the generation of 'exogenous' NO is also sensitive to alterations in tissue PO2. I/R injury was studied in a hamster chamber window, with compression of the periphery of the window for 1 hour to induce ischemia...
April 27, 2017: Expert Review of Hematology
https://www.readbyqxmd.com/read/28437455/effect-of-a-probiotic-beverage-consumption-enterococcus-faecium-crl-183-and-bifidobacterium-longum-atcc-15707-in-rats-with-chemically-induced-colitis
#13
Larissa Sbaglia Celiberto, Raquel Bedani, Naiara Naiana Dejani, Alexandra Ivo de Medeiros, José Antonio Sampaio Zuanon, Luis Carlos Spolidorio, Maria Angela Tallarico Adorno, Maria Bernadete Amâncio Varesche, Fábio Carrilho Galvão, Sandro Roberto Valentini, Graciela Font de Valdez, Elizeu Antonio Rossi, Daniela Cardoso Umbelino Cavallini
BACKGROUND: Some probiotic strains have the potential to assist in relieving the symptoms of inflammatory bowel disease. The impact of daily ingestion of a soy-based product fermented by Enterococcus faecium CRL 183 and Lactobacillus helveticus 416 with the addition of Bifidobacterium longum ATCC 15707 on chemically induced colitis has been investigated thereof within a period of 30 days. METHODS: Colitis was induced by dextran sulfate sodium. The animals were randomly assigned into five groups: Group C: negative control; Group CL: positive control; Group CLF: DSS with the fermented product; Group CLP: DSS with the non-fermented product (placebo); Group CLS: DSS with sulfasalazine...
2017: PloS One
https://www.readbyqxmd.com/read/28433142/enhanced-degradation-of-chitosan-by-applying-plasma-treatment-in-combination-with-oxidizing-agents-for-potential-use-as-an-anticancer-agent
#14
Chayanaphat Chokradjaroen, Ratana Rujiravanit, Anyarat Watthanaphanit, Sewan Theeramunkong, Nagahiro Saito, Kazuko Yamashita, Ryuichi Arakawa
Solution plasma (SP) treatment in combination with oxidizing agents, i.e., hydrogen peroxide (H2O2), potassium persulfate (K2S2O8) and sodium nitrite (NaNO2) were adopted to chitosan degradation in order to achieve fast degradation rate, low chemicals used and high yield of low-molecular-weight chitosan and chitooligosaccharide (COS). Among the studied oxidizing agents, H2O2 was found to be the best choice in terms of appreciable molecular weight reduction without major change in chemical structure of the degraded products of chitosan...
July 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28416347/blood-collection-vials-and-clinically-used-intravenous-fluids-contain-significant-amounts-of-nitrite
#15
Luis E F Almeida, Sayuri Kamimura, Margaret Y Nettleton, Celia M de Souza Batista, Elizabeth Walek, Alfia Khaibullina, Li Wang, Zenaide M N Quezado
The biology of the inorganic anion nitrite is linked to nitric oxide (NO) as nitrite can be reduced to NO and mediate its biological activities. Thus, studies of nitrite biology require sensitive and selective chemical assays. The acetic and ascorbic acids method is selective for nitrite and measures it in biological matrices. However, one of the pitfalls of nitrite measurements is its ubiquitous presence in sample collection tubes. Here, we showed high levels of nitrite in collection tubes containing EDTA, sodium citrate or sodium heparin and smaller amounts in tubes containing lithium heparin or serum clot activator...
April 15, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28402313/effects-of-carbon-sources-cod-no2-n-ratios-and-temperature-on-the-nitrogen-removal-performance-of-the-simultaneous-partial-nitrification-anammox-and-denitrification-snad-biofilm
#16
Zhaoming Zheng, Yun Li, Jun Li, Yanzhuo Zhang, Wei Bian, Jia Wei, Baihang Zhao, Jingyue Yang
The aim of the present work was to evaluate the effects of carbon sources and chemical oxygen demand (COD)/NO2(-)-N ratios on the anammox-denitrification coupling process of the simultaneous partial nitrification, anammox and denitrification (SNAD) biofilm. Also, the anammox activities of the SNAD biofilm were investigated under different temperature. Kaldnes rings taken from the SNAD biofilm reactor were operated in batch tests to determine the nitrogen removal rates. As a result, with the carbon source of sodium acetate, the appropriate COD/NO2(-)-N ratios for the anammox-denitrification coupling process were 1 and 2...
April 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28389351/enhancing-colour-and-oxidative-stabilities-of-reduced-nitrites-turkey-meat-sausages-during-refrigerated-storage-using-fucoxanthin-purified-from-the-tunisian-seaweed-cystoseira-barbata
#17
Sabrine Sellimi, Ghada Ksouda, Abdelkarim Ben Slima, Rim Nasri, Marguerite Rinaudo, Moncef Nasri, Mohamed Hajji
The present study investigated the angiotensin-I converting enzyme (ACE) inhibitory activity and the antioxidant properties, in vitro and in cured meat sausages containing reduced levels of sodium nitrites, of fucoxanthin purified from the Tunisian brown seaweed Cystoseira barbata (CBFX). Results revealed that CBFX exhibited great scavenging activities against DPPH free radicals (EC50 = 136 μg/ml), peroxyl radicals in the linoleate-β-carotene system (EC50 = 43 μg/ml) and hydroxyl radicals generated by Fenton reaction (DNA nicking assay)...
April 4, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28388524/a-sensitive-method-for-the-determination-of-sulfonamides-in-seawater-samples-by-solid-phase-extraction-and-uv-visible-spectrophotometry
#18
Sophia Ait Errayess, Abdellatif Ait Lahcen, Laila Idrissi, Caterina Marcoaldi, Salvatore Chiavarini, Aziz Amine
The authors have developed a sensitive spectrophotometric method for determination of sulfonamide derivatives such as sulfanilamide (SAA), sulfadiazine (SDZ), sulfacetamide (SCT) sulfamethoxazole (SMX), sulfamerazine (SMR), sulfadimethoxine (SDX), sulfamethiazole (SMT) and Sulfathiazole (STZ). This method is based on the Bratton-Marshall reaction, which involves the diazotization of sulfonamides with sodium nitrite under acidic conditions, followed by coupling with N-(1-naphtyl) ethylenediamine dihydrochloride (NED) to form a pink colored compound...
March 28, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28384248/acute-oral-dose-of-sodium-nitrite-induces-redox-imbalance-dna-damage-metabolic-and-histological-changes-in-rat-intestine
#19
Fariheen Aisha Ansari, Shaikh Nisar Ali, Hussain Arif, Aijaz Ahmed Khan, Riaz Mahmood
Industrialization and unchecked use of nitrate/nitrite salts for various purposes has increased human exposure to high levels of sodium nitrite (NaNO2) which can act as a pro-oxidant and pro-carcinogen. Oral exposure makes the gastrointestinal tract particularly susceptible to nitrite toxicity. In this work, the effect of administration of a single acute oral dose of NaNO2 on rat intestine was studied. Animals were randomly divided into four groups and given single doses of 20, 40, 60 and 75 mg NaNO2/kg body weight...
2017: PloS One
https://www.readbyqxmd.com/read/28383258/environmental-conditions-influencing-sorption-of-inorganic-anions-to-multiwalled-carbon-nanotubes-studied-by-column-chromatography
#20
Florian Metzelder, Torsten C Schmidt
Sorption to carbon-based nanomaterials is typically studied in batch experiments. An alternative method offering advantages to study sorption is column chromatography. Sorbent packed columns are used and sorption data are determined by relating sorbate retention to that of a nonretarded tracer. We have now for the first time applied this technique to study the influence of environmental conditions on sorption of inorganic anions (bromide, nitrite, nitrate, and iodide) to multiwalled carbon nanotubes. Deuterium oxide was used as nonretarded tracer...
April 17, 2017: Environmental Science & Technology
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