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Redox Report: Communications in Free Radical Research

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https://www.readbyqxmd.com/read/29148924/influence-of-gestational-diabetes-on-the-activity-of-%C3%AE-aminolevulinate-dehydratase-and-oxidative-stress-biomarkers
#1
Fabiane Rodrigues, Leidiane de Lucca, Walter S Neme, Thissiane de Lima Gonçalves
OBJECTIVES: This study aimed to evaluate the activity of delta-aminolevulinate dehydratase (δ-ALA-D) and oxidative stress biomarkers in pregnant women with gestational diabetes mellitus (GDM), in order to demonstrate the involvement of oxidative stress in this condition, which presents pathophysiology still undetermined. METHODS: δ-ALA-D activity, lipid peroxidation estimated as the levels of thiobarbituric acid reactive substances (TBARS), protein (P-SH) and non-protein thiol (NP-SH) content, catalase (CAT) activity and concentration of vitamin C (VIT C) in samples of pregnant women with GDM (n = 48) and in healthy pregnant women (n = 30), who constituted the control group...
November 17, 2017: Redox Report: Communications in Free Radical Research
https://www.readbyqxmd.com/read/29088999/antioxidant-antihyperglycemic-and-antidyslipidemic-effects-of-brazilian-native-fruit-extracts-in-an-animal-model-of-insulin-resistance
#2
Juliane de Souza Cardoso, Pathise Souto Oliveira, Natália Pontes Bona, Flávia Aleixo Vasconcellos, Jucimara Baldissarelli, Marcia Vizzotto, Mayara Sandrielly Pereira Soares, Vanessa Plasse Ramos, Roselia Maria Spanevello, Claiton Leoneti Lencina, Rejane Giacomelli Tavares, Francieli Moro Stefanello
OBJECTIVE: Insulin resistance (IR) plays an important role in the development of many diseases, such as diabetes mellitus. Therefore, the aim of the present study was to evaluate the effects of the extracts from fruits native to Brazil on metabolic parameters and hepatic oxidative markers in an animal model of insulin resistance induced by dexamethasone (DEX). METHODS: Wistar rats received water or extracts of Eugenia uniflora or Psidium cattleianum, once a day for 21 days...
October 31, 2017: Redox Report: Communications in Free Radical Research
https://www.readbyqxmd.com/read/29088986/a-comparison-of-native-and-non-urate-total-antioxidant-capacity-of-fasting-plasma-and-saliva-among-middle-aged-and-older-subjects
#3
Anna Gawron-Skarbek, Anna Prymont-Przymińska, Agnieszka Sobczak, Agnieszka Guligowska, Tomasz Kostka, Dariusz Nowak, Franciszek Szatko
OBJECTIVES: As plasma and salivary total antioxidant capacity (TAC) is mainly contributed by uric acid (UA), the present study measures non-urate TAC (Nu-TAC). The aim of the study was to correlate plasma native TAC, Nu-TAC and UA with their salivary analogues, and compare the UA contribution in both body fluids using two different methods. METHODS: The study involved 55 middle-aged and older subjects (66.7 ± 4.5 years). TAC was determined simultaneously with two methods (ferric reducing ability of plasma - FRAP, 2...
October 31, 2017: Redox Report: Communications in Free Radical Research
https://www.readbyqxmd.com/read/29088980/spectrophotometric-assays-for-measuring-redox-biomarkers-in-blood-and-tissues-the-nadph-network
#4
Aristidis S Veskoukis, Nikos V Margaritelis, Antonios Kyparos, Vassilis Paschalis, Michalis G Nikolaidis
Nicotinamide adenine dinucleotide (NAD(+)/NADH) along with its phosphorylated form (NADP(+)/NADPH) are two molecules ubiquitously present in all organisms, and they play key roles as cofactors in fundamental catabolic and anabolic processes, respectively. The oxidation of NADPH to NADP(+) initiates a cascade of reactions, where a network of molecules is implicated. The molecules of this cascade form a network with eminent translational potential in redox metabolism. A special point of interest is that spectrophotometric assays have been developed both for NADH/NADPH and the molecules directly regulated by them...
October 31, 2017: Redox Report: Communications in Free Radical Research
https://www.readbyqxmd.com/read/28873049/biomarkers-of-antioxidant-status-and-lipid-peroxidation-in-elderly-patients-with-hypertension
#5
Hanna Pawluk, Robert Pawluk, Joanna Robaczewska, Kornelia Kędziora-Kornatowska, Józef Kędziora
OBJECTIVE: The objective of the present study was to examine selected parameters of the blood redox system in elderly patients with hypertension.examine selected parameters of the blood redox system in elderly patients with hypertension. METHODS: We analyzed differences in redox-associated molecules and enzymes among elderly hypertensive subjects (age above 65 years, n = 49) and two groups of normotensive subjects (<65 years old - Control group I; n = 27, and >65 - Control group II; n = 30)...
September 5, 2017: Redox Report: Communications in Free Radical Research
https://www.readbyqxmd.com/read/28853330/activity-of-the-antioxidant-enzyme-paraoxonase-in-argentinean-children-living-at-high-altitude
#6
V Hirschler, M Martín, K Oestreicher, C Molinari, W Tetzlaff, E Botta, L Boero, F Brites
BACKGROUND: Children living at high altitude in San Antonio de los Cobres (SAC), Argentina, were shown to have lower high-density lipoprotein cholesterol (HDL-C) levels than Buenos Aires (BA) children. HDL antioxidant capacity is mainly attributed to paraoxonase1 (PON1). OBJECTIVE: To compare PON1 activity in indigenous SAC vs. BA children. METHODS: A cross-sectional study compared 158 SAC vs. 97 BA children (6-16 years). Anthropometric data and lipoprotein profile were measured...
August 30, 2017: Redox Report: Communications in Free Radical Research
https://www.readbyqxmd.com/read/28845739/poor-acute-outcome-in-congestive-heart-failure-is-associated-with-increases-in-the-plasma-static-oxidation-reduction-potentials-sorp-in-men-but-not-in-women
#7
Kimberly B Bjugstad, Jeffrey Lalama, Leonard T Rael, Kristin Salottolo, Ira Dauber, David Bar-Or
OBJECTIVES: In congestive heart failure (CHF), men are younger, more likely to have reduced ejection fraction (HF-rEF), and to be diabetic compared to women. Despite this, sex differences in oxidative stress have yet to be explored in CHF. METHODS: Data from 67 males and 63 females hospitalized for CHF were collected. Static oxidation-reduction potential (sORP), a relative indicator of oxidative stress, and capacity ORP (icORP), a relative indicator of antioxidant capacity, were measured from plasma samples...
August 28, 2017: Redox Report: Communications in Free Radical Research
https://www.readbyqxmd.com/read/27595775/the-diaphragm-is-better-protected-from-oxidative-stress-than-hindlimb-skeletal-muscle-during-clp-induced-sepsis
#8
Hélène Talarmin, Frédéric Derbré, Luz Lefeuvre-Orfila, Karelle Léon, Mickaël Droguet, Jean-Pierre Pennec, Marie-Agnès Giroux-Metgès
OBJECTIVES: The aim of this study was to determine whether non-lethal sepsis induced by cecal ligation and puncture (CLP) modulates oxidative damage and enzymatic antioxidant defenses in diaphragm and hindlimb skeletal muscles (soleus and Extensor Digitorus Longus (EDL)). METHODS: Female Wistar rats were divided into four experimental groups: (1) control animals, (2) animals sacrificed 2 hours or (3) 7 days after CLP, and (4) sham-operated animals. At the end of the experimental procedure, EDL, soleus, and diaphragm muscles were harvested and 4-hydroxynonenal (HNE)-protein adducts and protein carbonyl contents were examined in relation to superoxide dismutase and catalase expression and activities...
September 2017: Redox Report: Communications in Free Radical Research
https://www.readbyqxmd.com/read/27387094/oxidative-stress-in-otosclerosis
#9
Elif Baysal, Secaattin Gulsen, Ismail Aytac, Fatih Celenk, Nuray Ensari, Seyithan Taysi, Habib Binici, Cengiz Durucu, Semih Mumbuc, Muzaffer Kanlikama
OBJECTIVES: Otosclerosis is a disease involving abnormal bone turnover in the human otic capsule that results in hearing loss. Several hypotheses have been suggested for the etiopathogenesis of otosclerosis; however, its etiology remains unclear. METHODS: This study evaluated the correlation between otosclerosis and levels of paraoxonase-1 (PON1), arylesterase, total antioxidant status, total oxidant status (TOS), oxidative stress index (OSI), total sulfhydryl (-SH) groups, lipid hydroperoxide, and ceruloplasmin in the serum of otosclerosis patients and healthy subjects with respect to oxidative stress...
September 2017: Redox Report: Communications in Free Radical Research
https://www.readbyqxmd.com/read/27320745/serum-prolidase-activity-and-oxidative-antioxidative-status-in-patients-with-developmental-dysplasia-of-the-hip-and-its-relationship-with-radiographic-severity
#10
Mehmet Akif Altay, Cemil Ertürk, Ali Levent, Baki Volkan Çetin, Nurten Aksoy
BACKGROUND: We aimed to investigate serum prolidase activity and to investigate its association with oxidative-antioxidative status in patients with developmental dysplasia of the hip (DDH). METHODS: Oxidative status parameters, including lipid hydroperoxide (LOOH), total oxidant status (TOS), and the oxidative stress index (OSI), and antioxidative status parameters, free sulfhydryl groups (Total -SH), and total antioxidative capacity (TAC), as well as serum prolidase activity were assessed in patients with DDH (n = 93), and in healthy controls (n = 82)...
September 2017: Redox Report: Communications in Free Radical Research
https://www.readbyqxmd.com/read/27198857/arteriovenous-oscillations-of-the-redox-potential-is-the-redox-state-influencing-blood-flow
#11
Jaroslaw Poznanski, Pawel Szczesny, Bartosz Pawlinski, Tomasz Mazurek, Piotr Zielenkiewicz, Zdzislaw Gajewski, Leszek Paczek
OBJECTIVE: Studies on the regulation of human blood flow revealed several modes of oscillations with frequencies ranging from 0.005 to 1 Hz. Several mechanisms were proposed that might influence these oscillations, such as the activity of vascular endothelium, the neurogenic activity of vessel wall, the intrinsic activity of vascular smooth muscle, respiration, and heartbeat. These studies relied typically on non-invasive techniques, for example, laser Doppler flowmetry. Oscillations of biochemical markers were rarely coupled to blood flow...
September 2017: Redox Report: Communications in Free Radical Research
https://www.readbyqxmd.com/read/27096391/alteration-of-thiol-disulphide-homeostasis-in-acute-tonsillopharyngitis
#12
Soner Sertan Kara, Ozcan Erel, Tugba Bedir Demirdag, Burcu Ceylan Cura Yayla, Belgin Gulhan, Salim Neselioglu, Meltem Polat, Gokhan Kalkan, Anil Tapisiz, Hasan Tezer
OBJECTIVE: Thiol-disulphide homeostasis (TDH) has a critical role in various clinical disorders. We aimed to assess the association of TDH with acute tonsillopharyngitis (AT) in children. METHODS: This study included 94 (73 viral and 21 bacterial) tonsillopharyngitis patients and 88 control children. Their native thiol, total thiol, and disulphide levels were measured. RESULTS: Viral and bacterial tonsillopharyngitis patients had lower native thiol levels compared with healthy children (P < 0...
September 2017: Redox Report: Communications in Free Radical Research
https://www.readbyqxmd.com/read/27090392/oxidative-stress-is-associated-with-decreased-heart-rate-variability-in-patients-with-chronic-kidney-disease
#13
Shannon B Fadaee, Kassia S Beetham, Erin J Howden, Tony Stanton, Nicole M Isbel, Jeff S Coombes
OBJECTIVES: Elevated oxidative stress and reduced heart rate variability (HRV) is prevalent in patients with chronic kidney disease (CKD) and is associated with increased morbidity and mortality. Previous studies have identified a positive association between elevated oxidative stress and autonomic dysfunction, however this relationship has not yet been investigated in the CKD population. METHODS: Plasma was collected from 78 patients with stage 3-4 CKD (estimated glomerular filtration rate 25-60 ml/min/1...
September 2017: Redox Report: Communications in Free Radical Research
https://www.readbyqxmd.com/read/28813209/galangin-a-natural-flavonoid-reduces-mitochondrial-oxidative-damage-in-streptozotocin-induced-diabetic-rats
#14
Amal A Aloud, Chinnadurai Veeramani, Chandramohan Govindasamy, Mohammed A Alsaif, Khalid S Al-Numair
OBJECTIVE: We designed this study to observe the effect of galangin on damaged mitochondria in the liver of diabetic rats. METHODS: Male albino Wistar rats were made diabetic by injecting streptozotocin (STZ) intraperitoneally (40 mg kg(-1) body weight (BW)). Galangin (8 mg kg(-1) BW) or glibenclamide (600 µg kg(-1) BW) was given orally daily once for 45 days to both healthy and diabetic rats. RESULTS: Diabetic rats showed significant (P < 0...
August 16, 2017: Redox Report: Communications in Free Radical Research
https://www.readbyqxmd.com/read/28812524/biologically-important-hydrazide-containing-fused-azaisocytosines-as-antioxidant-agents
#15
Małgorzata Sztanke, Krzysztof Sztanke
OBJECTIVES: Two important classes of hydrazide-containing fused azaisocytosines were evaluated as possible antioxidants and characterised by UV spectroscopy. METHODS: 2,2-Diphenyl-1-picrylhydazyl (DPPH), nitric oxide (NO), hydrogen peroxide (H2O2) scavenging potencies and reducing power of molecules were evaluated. RESULTS: The strongest DPPH scavengers were found to be 9, showing the potency superior to that of butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT), propyl gallate (PG) and 6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid (Trolox) and comparable to that of ascorbic acid (AA), and 6, revealing the antioxidant potency superior to that of BHA, BHT, PG and Trolox...
August 16, 2017: Redox Report: Communications in Free Radical Research
https://www.readbyqxmd.com/read/28657497/hesperidin-attenuates-inflammation-and-oxidative-damage-in-pleural-exudates-and-liver-of-rat-model-of-pleurisy
#16
Stephen Adeniyi Adefegha, Daniela Bitencourt Rosa Leal, Ayodeji Augustine Olabiyi, Ganiyu Oboh, Livia Gelain Castilhos
OBJECTIVES: This study investigated the potential anti-inflammatory effect of hesperidin against carrageenan induced pleurisy in rat model. METHODS: Twenty-four adult female Wistar rats (350 - 450g) were grouped as follows: Group I: rats were administered saline solution only (Normal control group); Group II: rats were administered saline solution (NaCl 0.9%) orally and injected with carrageenan (Inflammation control group); Group III: rats were administered hesperidin only (Hesperidin group); Group IV: rats were administered hesperidin orally and intrapleurally injected with 2% carrageenan (Inflammation treated with hesperidin group)...
June 28, 2017: Redox Report: Communications in Free Radical Research
https://www.readbyqxmd.com/read/28651456/phytochemical-treatments-target-kynurenine-pathway-induced-oxidative-stress
#17
K Parasram
OBJECTIVE: The objective of this paper was to link the phytochemical and metabolic research treating quinolinic acid induced oxidative stress in neurodegenerative disorders. METHODS: Quinolinic acid, a metabolite of the kynurenine pathway of tryptophan catabolism, plays a role in the oxidative stress associated with many neurological disorders and is used to simulate disorders such as Parkinson's disease. RESULTS: In these models, phytochemicals have been shown to reduce striatal lesion size, reduce inflammation and prevent lipid peroxidation caused by quinolinic acid...
June 26, 2017: Redox Report: Communications in Free Radical Research
https://www.readbyqxmd.com/read/28532341/pterostilbene-protects-against-uvb-induced-photo-damage-through-a-phosphatidylinositol-3-kinase-dependent-nrf2-are-pathway-in-human-keratinocytes
#18
Huaping Li, Na Jiang, Bihua Liang, Qing Liu, Erting Zhang, Liqian Peng, Huiyan Deng, Runxiang Li, Zhenjie Li, Huilan Zhu
OBJECTIVE: Ultraviolet B (UVB) irradiation is the initial etiological factor for various skin disorders, including erythema, sunburn, photoaging, and photocarcinogenesis. Pterostilbene (Pter) displayed remarkable antioxidant, anti-inflammatory, and anticarcinogenic activities. This study aimed to investigate the effective mechanism of Pter against UVB-induced photodamage in immortalized human keratinocytes. METHODS: Human keratinocytes were pretreated with Pter (5 and 10 μM) for 24 h prior to UVB irradiation (300 mJ/cm(2))...
May 22, 2017: Redox Report: Communications in Free Radical Research
https://www.readbyqxmd.com/read/28521618/markers-of-oxidative-nitrative-damage-of-plasma-proteins-correlated-with-edss-and-bdi-scores-in-patients-with-secondary-progressive-multiple-sclerosis
#19
Agnieszka Morel, Michał Bijak, Marta Niwald, Elżbieta Miller, Joanna Saluk
Objectives The objective of the present study was to evaluate oxidative/nitrative stress in the plasma of 50 patients suffering from the secondary progressive course of multiple sclerosis (MS), and to verify its correlation with physical and mental disability as assessed by the Expanded Disability Status Scale (EDSS), and the Beck Depression Inventory (BDI). Methods Oxidative and nitrative damage to proteins was determined by the level of carbonyl groups and 3-nitrotyrosine using ELISA test. Based on the reaction with Ellman's reagent, we estimated the concentration of oxidized thiol groups...
May 19, 2017: Redox Report: Communications in Free Radical Research
https://www.readbyqxmd.com/read/28514939/antioxidant-properties-of-drugs-used-in-type-2-diabetes-management-could-they-contribute-to-confound-or-conceal-effects-of-antioxidant-therapy
#20
Siu Wai Choi, Cyrus K Ho
OBJECTIVES: This is a narrative review, investigating the antioxidant properties of drugs used in the management of diabetes, and discusses whether these antioxidant effects contribute to, confound, or conceal the effects of antioxidant therapy. METHODS: A systematic search for articles reporting trials, or observational studies on the antioxidant effect of drugs used in the treatment of diabetes in humans or animals was performed using Web of Science, PubMed, and Ovid...
May 17, 2017: Redox Report: Communications in Free Radical Research
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