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Superoxide AND Quercetin

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https://www.readbyqxmd.com/read/28183032/manganese-neurotoxicity-and-protective-effects-of-resveratrol-and-quercetin-in-preclinical-research
#1
Maciej Gawlik, Małgorzata B Gawlik, Irena Smaga, Małgorzata Filip
BACKGROUND: Exposure to Mn results in a neurological syndrome known as manganism. METHODS: We examined how 4-week Mn exposure (20mg/kg MnCl2po, 5days/week) induces neurotoxic effects in rats. Oxidized-to-reduced glutathione ratio (GSSG/GSH), malondialdehyde (MDA), superoxide dismutase (SOD) activity, catalase (CAT) activity, vitamin E content and caspase-3 activity were measured in several rat brain structures. Further, we examined protective effects of the polyphenols: resveratrol (R) or quercetin (QCT) against Mn-induced neurotoxicity...
December 14, 2016: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/28137214/phytochemical-constituents-ches-and-urease-inhibition-antiproliferative-and-antioxidant-properties-of-elaeagnus-umbellata-thunb
#2
Tevfik Ozen, Semiha Yenigun, Muhammed Altun, Ibrahim Demirtas
Due to the common ethnopharmacological used or scientifically examined biochemical properties, Elaeagnaceae family, Elaeagnus umbellata Thunb. (autumn olive) was worth investigated. In this investigation, we revealed antioxidant, antiproliferative and enzyme inhibition activities of the water, methanol, ethanol, acetone, ethyl acetate and hexane extracts of E. umbellata as well as contents of their phenolic, flavonoid, anthocyanin, ascorbic acid, lycopene and b-carotene. The antioxidant activity was screened by phosphomolybdenum assay...
January 27, 2017: Combinatorial Chemistry & High Throughput Screening
https://www.readbyqxmd.com/read/28119263/quercetin-protects-liver-injury-induced-by-bile-duct-ligation-via-attenuation-of-rac1-and-nadph-oxidase1-expression-in-rats
#3
Razieh Kabirifar, Zohreh-Al-Sadat Ghoreshi, Fatemeh Safari, Alireza Karimollah, Ali Moradi, Ebrahim Eskandari-Nasab
BACKGROUND: Bile duct ligation (BDL) and subsequent cholestasis are correlated with oxidative stress, hepatocellular injury and fibrosis. Quercetin is a flavonoid with antifibrotic, and hepatoprotective properties. However, the molecular mechanism underlying quercetin-mediated hepatoprotection is not fully understood. The current study was to evaluate mechanisms of hepatoprotective effect of quercetin in BDL rat model. METHODS: We divided male Wistar rats into 4 groups (n=8 for each): sham, sham+quercetin (30 mg/kg per day), BDL, and BDL+quercetin (30 mg/kg per day)...
February 2017: Hepatobiliary & Pancreatic Diseases International: HBPD INT
https://www.readbyqxmd.com/read/28115850/gold-quercetin-nanoparticles-prevent-metabolic-endotoxemia-induced-kidney-injury-by-regulating-tlr4-nf-%C3%AE%C2%BAb-signaling-and-nrf2-pathway-in-high-fat-diet-fed-mice
#4
Min-Xuan Xu, Ming Wang, Wei-Wei Yang
High-fat diet-induced metabolic syndrome followed by chronic kidney disease caused by intestinal endotoxemia have received extensive attention. Toll-like receptor 4 (TLR4)/nuclear factor-kappa B (NF-κB) and oxidative stress-related Nrf2/Keap1 were regarded as the key target points involved in metabolic inflammation and kidney injury. However, the molecular mechanism of interaction between TLR4/NF-κB and Nrf2 activation in high-fat diet-induced renal injury is not absolutely understood. Quercetin, a natural product, has been reported to possess antitumor and anti-inflammatory effects...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28104348/quercetin-protects-against-heat-stroke-induced-myocardial-injury-in-male-rats-antioxidative-and-antiinflammatory-mechanisms
#5
Xiaojing Lin, Cheng-Hsien Lin, Tingbao Zhao, Dan Zuo, Zhujun Ye, Lin Liu, Mao-Tsun Lin
Heat stroke is characterized by hyperthermia, systemic inflammation, and multiple organ failure including arterial hypotension. This definition can be fulfilled by a rat model of heat stroke used in the present study. Anesthetized animals were exposed to heat exposure (43 °C for 70 min) and then returned to room temperature (26 °C) for recovery. One hour before heat exposure, an intraperitoneal dose of quercetin (30 mg/kg) or vehicle (normal saline 1 ml/kg) was administered to the experimental groups of rats...
January 16, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/28043195/ameliorative-effects-of-gallic-acid-quercetin-and-limonene-on-urethane-induced-genotoxicity-and-oxidative-stress-in-drosophila-melanogaster
#6
Isha Nagpal, Suresh K Abraham
The main objective of our present work was to ascertain the efficacy of Drosophila melanogaster model for assessing antigenotoxic and antioxidant effects of dietary phytochemicals gallic acid (GA), quercetin (QC) and limonene (Lim) against urethane (URE), a genotoxic environmental carcinogen. Oregon-K (ORK) adult male flies were fed GA, QC and Lim in combination with URE (20 mM) in 10% sucrose for 72 h. Third instar larvae were fed instant medium containing the above phytochemicals and URE for 24 h. Sex-linked recessive lethal (SLRL) test and assays for estimating glutathione content (GSH), glutathione S-transferase (GST), catalase (CAT), superoxide dismutase (SOD) and lipid peroxidation (MDA content) were performed...
January 18, 2017: Toxicology Mechanisms and Methods
https://www.readbyqxmd.com/read/28035607/beneficial-effects-of-quercetin-on-titanium-dioxide-nanoparticles-induced-spermatogenesis-defects-in-mice
#7
Layasadat Khorsandi, Mahmoud Orazizadeh, Nahid Moradi-Gharibvand, Masoud Hemadi, Esrafil Mansouri
Many recent studies have demonstrated that most nanoparticles (NPs) have an adverse or toxic action on male germ cells. In present study, protective effect of quercetin (Que) on titanium dioxide nanoparticle (NTiO2)-induced spermatogenesis defects in mice was investigated. Thirty-two Naval Medical Research Institute (NMRI) mice were randomly divided into four groups. Que group received 75 mg/kg of Que for 42 days. NTiO2 group received 300 mg/kg NTiO2 for 35 days. NTiO2 + Que group initially received 75 mg/kg Que for 7 days and was followed by concomitant administration of 300 mg/kg NTiO2 for 35 days...
December 29, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28033106/protective-effects-of-quercetin-and-vitamin-c-against-nicotine-induced-toxicity-in-the-blood-of-wistar-rats
#8
Milica G Paunović, Branka I Ognjanović, Miloš M Matić, Andraš Š Štajn, Zorica S Saičić
Nicotine is a potential inducer of oxidative stress, through which it can damage numerous biological molecules. The aim of our study was to investigate the prooxidative effects of nicotine and protective (additive or synergistic) effects of quercetin and vitamin C in the blood of experimental animals, to determine whether the combination of these antioxidants might be beneficial for clinical purposes. Wistar albino rats were receiving intraperitoneal nicotine injection (0.75 mg kg-1 per day) or saline (control group) or nicotine plus quercetin (40 mg kg-1 per day) and vitamin C (100 mg kg-1 per day) for three consecutive days...
December 1, 2016: Arhiv za Higijenu Rada i Toksikologiju
https://www.readbyqxmd.com/read/27832996/quercetin-changes-purinergic-enzyme-activities-and-oxidative-profile-in-platelets-of-rats-with-hypothyroidism
#9
Jucimara Baldissarelli, Adriana Santi, Roberta Schmatz, Daniela Zanini, Andréia M Cardoso, Fátima H Abadalla, Gustavo R Thomé, Camila Murussi, Carla R N Polachini, Diéssica P Delenogare, Vania L Loro, Vera M Morsch, Maria R C Schetinger
Diseases related to thyroid hormones have been extensively studied because affect a large number of individuals, and these hormones participate in the regulation of the whole organism homeostasis. However, little is known about the involvement of purinergic signaling related to oxidative stress in hypothyroidism and possible therapeutic adjuncts for treatment of this disorder. Thus, the present study investigates the effects of quercetin on NTPDase, 5'-nucleotidase and adenosine deaminase activities, platelet aggregation and oxidative profile in platelets of rats with methimazole (MMI)-induced hypothyroidism...
December 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27801831/antioxidant-enzyme-activities-and-lipid-oxidation-in-rape-brassica-campestris-l-bee-pollen-added-to-salami-during-processing
#10
Yawei Zhang, Fengtian Yang, Muneer Ahmed Jamali, Zengqi Peng
The present research investigated the antioxidant effect of rape (Brassica campestris L.) bee pollen (RBP) on salami during processing. Eight flavonoids in RBP ethanol extract were quantified by high-performance liquid chromatography-mass spectrometry (HPLC-MS) analysis, and quercetin, rutin, and kaempferol were the major bioactive compounds. The RBP ethanol extract exhibited higher total antioxidant capacity than 6-hydroxy-2,5,7,8-tertramethylchromancarboxylic acid (trolox) at the same concentration. The salami with 0...
October 28, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27796749/quercetin-exerts-differential-neuroprotective-effects-against-h2o2-and-a%C3%AE-aggregates-in-hippocampal-neurons-the-role-of-mitochondria
#11
Juan A Godoy, Carolina B Lindsay, Rodrigo A Quintanilla, Francisco J Carvajal, Waldo Cerpa, Nibaldo C Inestrosa
Amyloid-β peptide (Aβ) is one of the major players in the pathogenesis of Alzheimer's disease (AD). Despite numerous studies, the mechanisms by which Aβ induces neurodegeneration are not completely understood. Oxidative stress is considered a major contributor to the pathogenesis of AD, and accumulating evidence indicates that high levels of reactive oxygen species (ROS) are involved in Aβ-induced neurodegeneration. Moreover, Aβ can induce the deregulation of calcium homeostasis, which also affects mitochondrial function and triggers neuronal cell death...
October 28, 2016: Molecular Neurobiology
https://www.readbyqxmd.com/read/27780244/protective-effects-of-quercetin-on-mitochondrial-biogenesis-in-experimental-traumatic-brain-injury-via-the-nrf2-signaling-pathway
#12
Xiang Li, Handong Wang, Yongyue Gao, Liwen Li, Chao Tang, Guodao Wen, Yuan Zhou, Mengliang Zhou, Lei Mao, Youwu Fan
The present investigation was carried out to elucidate a possible molecular mechanism related to the protective effect of quercetin administration against oxidative stress on various mitochondrial respiratory complex subunits with special emphasis on the role of nuclear factor erythroid 2-related factor 2 (Nrf2) in mitochondrial biogenesis. Recently, quercetin has been proved to have a protective effect against mitochondria damage after traumatic brain injury (TBI). However, its precise role and underlying mechanisms in traumatic brain injury are not yet fully understood...
2016: PloS One
https://www.readbyqxmd.com/read/27769934/polyphenolic-glycoconjugates-from-medical-plants-of-rosaceae-asteraceae-family-protect-human-lymphocytes-against-%C3%AE-radiation-induced-damage
#13
Magdalena Szejk, Tomasz Poplawski, Joanna Sarnik, Izabela Pawlaczyk-Graja, Franciszek Czechowski, Alicja Klaudia Olejnik, Roman Gancarz, Halina Malgorzata Zbikowska
Radioprotective effects of the water-soluble polyphenolic glycoconjugates, isolated from flowers of Sanguisorba officinalis L.(SO) and Erigeron canadensis L.(EC), and from leaves of Fragaria vesca L. (FV) and Rubus plicatus Whe. Et N. E. (RP), against γ-radiation-induced toxicity in human peripheral blood lymphocytes were investigated. Cell treatment with glycoconjugates (1, 5 and 25μg/mL) prior exposure to 10/15Gy radiation resulted in concentration-dependent reduction of DNA damage including oxidative DNA lesions (comet assay), substantial inhibition of lipid peroxidation (TBARS) and restoration of superoxide dismutase and S-glutathione transferase activities...
January 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/27717661/protective-effect-of-quercetin-on-homocysteine-induced-oxidative-stress
#14
Naime Çelik, Ayhan Vurmaz, Ahmet Kahraman
OBJECTIVE: The aim of this study was to evaluate whether quercetin (QUER) treatment could have a protective effect against oxidative stress induced by homocysteinemia in rats. MATERIALS AND METHODS: Thirty-two male Sprague-Dawley rats (adult) were assigned randomly to four groups: the control group was given physiological saline (PS; 1.5 mL/d); the QUER group was given QUER (50 mg/kg body weight [BW] daily) in distilled water and 0.25 mL PS; the homocysteine (HCY) group was given HCY (1 mg/kg BW daily) in distilled water and 1...
January 2017: Nutrition
https://www.readbyqxmd.com/read/27695265/in-vitro-antioxidant-activities-and-polyphenol-contents-of-seven-commercially-available-fruits
#15
Paramita Basu, Camelia Maier
BACKGROUND: Fruits are considered one of the richest sources of natural antioxidants. Their consumption has been linked to the prevention of oxidative stress-induced diseases. OBJECTIVE: In this study, in vitro antioxidant activities of blueberry, jackfruit, blackberry, black raspberry, red raspberry, strawberry, and California table grape extracts were evaluated. MATERIALS AND METHODS: Antioxidant activities were determined by 2,2-diphenyl-1-picrylhydrazyl (DPPH), ferric reducing antioxidant potential (FRAP), 2,2'-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS), nitric oxide (NO), superoxide anion (O2(-)) scavenging assays, and ferric reducing power...
October 2016: Pharmacognosy Research
https://www.readbyqxmd.com/read/27688827/antioxidant-and-vasodilator-activity-of-ugni-molinae-turcz-murtilla-and-its-modulatory-mechanism-in-hypotensive-response
#16
Ignacio Jofré, Cesar Pezoa, Magdalena Cuevas, Erick Scheuermann, Irlan Almeida Freires, Pedro Luiz Rosalen, Severino Matias de Alencar, Fernando Romero
Hypertension is a systemic condition with high morbidity and mortality rates worldwide, which poses an increased risk for cardiovascular diseases. In this study, we demonstrated the antioxidant and vasodilator activity of Ugni molinae Turcz. (Murtilla) fruit, a berry native to Chile and proposed models to explain its modulatory mechanism in hypotensive response. Murtilla fruits were cultivated in a germplasm bank and submitted to chemical and biological analyses. The phenolic compounds gallic acid, Catechin, Quercetin-3-β-D-glucoside, Myricetin, Quercetin, and Kaempferol were identified...
2016: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/27680742/protective-effect-of-3-o-methyl-quercetin-and-kaempferol-from-semecarpus-anacardium-against-h2o2-induced-cytotoxicity-in-lung-and-liver-cells
#17
A D Naveen Kumar, Ganesh Babu Bevara, Laxmi Koteswaramma Kaja, Anil Kumar Badana, Rama Rao Malla
BACKGROUND: Hydrogen peroxide is continuously generated in living cells through metabolic pathways and serves as a source of reactive oxygen species. Beyond the threshold level, it damages cells and causes several human disorders, including cancer. METHODS: Effect of isolated 3-O-methyl quercetin and kaempferol on H2O2 induced cytotoxicity, ROS formation, plasma membrane damage, loss of mitochondrial membrane potential, DNA damage was evaluated in normal liver and lung cells...
September 29, 2016: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/27658546/flavonoid-compounds-from-the-red-marine-alga-alsidium-corallinum-protect-against-potassium-bromate-induced-nephrotoxicity-in-adult-mice
#18
Hajer Ben Saad, Manel Gargouri, Fatma Kallel, Rim Chaabene, Tahia Boudawara, Kamel Jamoussi, Christian Magné, Khaled Mounir Zeghal, Ahmed Hakim, Ibtissem Ben Amara
Potassium bromate (KBrO3 ), an environmental pollutant, is a well-known human carcinogen and a potent nephrotoxic agent. Currently, natural products have built a well-recognized role in the management of many diseases induced by pollutants. As potent natural sources of bioactive compounds, marine algae have been demonstrated to be rich in novel secondary metabolites with a broad range of biological functions. In this study, adults male mice were orally treated for 15 days with KBrO3 (0.5 g/L) associated or not with extract of Alsidium corallinum, a red Mediterranean alga...
September 23, 2016: Environmental Toxicology
https://www.readbyqxmd.com/read/27648146/quercetin-induces-mitochondrial-biogenesis-in-experimental-traumatic-brain-injury-via-the-pgc-1%C3%AE-signaling-pathway
#19
Xiang Li, Handong Wang, Yongyue Gao, Liwen Li, Chao Tang, Guodao Wen, Youqing Yang, Zong Zhuang, Mengliang Zhou, Lei Mao, Youwu Fan
Quercetin, a dietary flavonoid used as a food supplement, has been found to have protective effect against mitochondria damage after traumatic brain injury (TBI) in mice. However, the mechanisms underlying these effects are still not well understood. The aim of the present study was to investigate the effect of quercetin on the potential mechanism mediating these effects in the weight-drop model of TBI in male mice that were treated with quercetin or vehicle via intraperitoneal injection administration 30 min after TBI...
2016: American Journal of Translational Research
https://www.readbyqxmd.com/read/27628241/chemomodulatory-effect-melastoma-malabathricum-linn-against-chemically-induced-renal-carcinogenesis-rats-via-attenuation-of-inflammation-oxidative-stress-and-early-markers-of-tumor-expansion
#20
Amita Verma, Prakash Chandra Bhatt, Gaurav Kaithwas, Nikunj Sethi, Mohd Rashid, Yashwant Singh, Mahfoozur Rahman, Fahad Al-Abbasi, Firoz Anwar, Vikas Kumar
Melastoma malabathricum Linn (MM) has high valued for its commercial significance. Indian market (northeast) has great demand for the plants, which extended, its use as a traditional home remedy due to its anti-inflammatory effects. In this study, we scrutinize the therapeutic and protective effect of MM against diethylnitrosamine (DEN) and ferric nitrilotriacetate (Fe-NTA)-induced renal carcinogenesis, renal hyperproliferation, and oxidative stress in rats. Liquid chromatography mass spectroscopy (LC-MS) was used for identification of phytoconstituents...
October 2016: Inflammopharmacology
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