Read by QxMD icon Read

Superoxide AND Quercetin

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, 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...
October 18, 2016: International Journal of Biological Macromolecules
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...
August 6, 2016: Nutrition
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
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
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
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
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
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
Fazlullah Khan, Kamal Niaz, Faheem Maqbool, Fatima Ismail Hassan, Mohammad Abdollahi, Kalyan C Nagulapalli Venkata, Seyed Mohammad Nabavi, Anupam Bishayee
Quercetin, a medicinally important member of the flavonoid family, is one of the most prominent dietary antioxidants. It is present in a variety of foods-including fruits, vegetables, tea, wine, as well as other dietary supplements-and is responsible for various health benefits. Numerous pharmacological effects of quercetin include protection against diseases, such as osteoporosis, certain forms of malignant tumors, and pulmonary and cardiovascular disorders. Quercetin has the special ability of scavenging highly reactive species, such as hydrogen peroxide, superoxide anion, and hydroxyl radicals...
2016: Nutrients
Shahira M Ezzat, Maha M Salama, Sayed H Seif El-Din, Samira Saleh, Naglaa M El-Lakkany, Olfat A Hammam, Maha B Salem, Sanaa S Botros
CONTEXT: Hibiscus sabdariffa L. (Malvaceae) is a common traditional tea that has many biological activities. OBJECTIVES: To evaluate the hepatoprotective effect and study the metabolic profile of the anthocyanin-rich extract of H. sabdariffa calyces (HSARE). MATERIALS AND METHODS: The hepatoprotective activity of HSARE was assessed (100 mg/kg/d for 4 weeks) by examining the hepatic, inflammatory, oxidative stress markers and performing a histopathological examination in rats with thioacetamide (TAA)-induced hepatotoxicity...
August 26, 2016: Pharmaceutical Biology
Pallavi Thakur, Raman Chawla, Rajeev Goel, Alka Narula, Rajesh Arora, Rakesh Kumar Sharma
The aim of this study was to analyse the in vitro synergistic antibacterial potential of an aquoethanolic extract of the stem bark of Berberis aristata (PTRC-2111-A) with third-line antibiotics against carbapenem-resistant Escherichia coli. PTRC-2111-A was prepared and was characterised using phytochemical- and bioactivity-based fingerprinting. Fourier transform infrared spectroscopy (FTIR) and liquid chromatography-mass spectrometry (LC-MS) analyses were performed, and superoxide and hydroxyl scavenging activities were assessed in conjunction with in vitro antimicrobial efficacy testing against the test micro-organism...
September 2016: Journal of Global Antimicrobial Resistance
Adel Mahfoudhi, Clara Grosso, Rui F Gonçalves, Eltaief Khelifi, Saoussen Hammami, Sami Achour, Malika Trabelsi Ayadi, Patrícia Valentão, Paula B Andrade, Zine Mighri
Tamarix aphylla (L.) Karst. has a wide geographic distribution and was employed in traditional medicine as astringent, anti-rheumatic and to treat fever. T. aphylla leaves and stems extracts were studied from both chemical and biological points of view to assess the antidiabetic, anti-cholinesterase and antioxidant potential of this species. The HPLC/DAD analysis showed the presence of 14 phenolic compounds (gallic, caffeic, p-coumaric, ferulic and ellagic acids, kaempferol, quercetin, quercetin-3-O-galactoside and six flavonol derivatives)...
August 12, 2016: Chemistry & Biodiversity
S A Trofimova, E E Dubinina, O A Balunov, N V Leonova
AIM: To investigate experimentally in vitro the antioxidant and anti-radical activity of several drugs. MATERIAL AND METHODS: Antioxidant activity was assessed by induced luminol-dependent chemiluminescence (CL). An impact on the generation of reactive oxygen species (O2-, OH, 1D, H2O2, HClO) and their ability to inhibit the auto-oxidation of quercetin combined with the generation of superoxide radical anion were determined. Anti-radical activity was studied by the method of restoring a stable radical α-α-diphenyl-β-picryl hydrazine (DPPH) molecule of the alleged anti-oxidant...
2016: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
Irakli Chkhikvishvili, Tamar Sanikidze, Nunu Gogia, Maia Enukidze, Marine Machavariani, Nana Kipiani, Yakov Vinokur, Victor Rodov
The flowers of French marigold (Tagetes patula L.) are widely used in folk medicine, in particular for treating inflammation-related disorders. However, cellular mechanisms of this activity demand further investigation. In the present work, we studied the potential of T. patula compounds to alleviate the oxidative stress in hydrogen peroxide-challenged human lymphoblastoid Jurkat T-cells. Crude extracts of marigold flowers and purified fractions containing flavonoids patuletin, quercetagetin, and quercetin and their derivatives, as well as the carotenoid lutein, were brought in contact with Jurkat cells challenged with 25 or 50 μM H2O2...
2016: Oxidative Medicine and Cellular Longevity
Gyu Song, Eleonora Napoli, Sarah Wong, Randi Hagerman, Siming Liu, Flora Tassone, Cecilia Giulivi
A 55-200 expansion of the CGG nucleotide repeat in the 5'-UTR of the fragile X mental retardation 1 gene (FMR1) is the hallmark of the triplet nucleotide disease known as the "premutation" as opposed to those with >200 repeats, known as the full mutation or fragile X syndrome. Originally, premutation carriers were thought to be free of phenotypic traits; however, some are diagnosed with emotional and neurocognitive issues and, later in life, with the neurodegenerative disease fragile X-associated tremor/ataxia syndrome (FXTAS)...
June 30, 2016: Molecular Medicine
Gabriel M Reis, Henrique Faccin, Carine Viana, Marcelo Barcellos da Rosa, Leandro M de Carvalho
Food and agricultural industries generate substantial quantities of phenolic-rich by-products that could be valuable natural sources of antioxidants. The aim of this study was to identify and quantify the phenolic compounds and radical scavenging activities of two by-products (pomace and lees) from Vitis vinifera L. cv Pinot noir. We found a different distribution of phenolic classes (flavanols, flavonols, phenolic acids and stilbenes) and singular scavenging activity against free radicals (hydroxyl, superoxide and peroxyl radicals)...
November 2016: International Journal of Food Sciences and Nutrition
Vinita D Apraj, Nancy S Pandita
BACKGROUND: The peel of Citrus reticulata Blanco is traditionally used as tonic, stomachic, astringent, and carminative. It is also useful in skin care. OBJECTIVE: To study the anti-aging potential of alcoholic extracts of C. reticulata Blanco peel using in vitro antioxidant and anti-enzyme assays. MATERIALS AND METHODS: Plant extracts were obtained by Soxhlation (CR HAE- Hot Alcoholic Extract of Citrus reticulata) and maceration method (CR CAE- Cold Alcoholic Extract of Citrus reticulata)...
July 2016: Pharmacognosy Research
Mehmet Kanter, Tevfik Aktoz, Cevat Aktas, Filiz Ozen, Oguzhan Yarali, Betul Kanter
OBJECTIVE: The aim of this study was to investigate the role of quercetin on cadmium-induced oxidative stress, testicular damage, and apoptosis in rat testes. STUDY DESIGN: The rats were randomly allotted into 1 of 3 experimental groups: control, cadmium-treated, and cadmium-treated with quercetin; each group con- tained 10 animals. Control animals received daily injec- tions of the saline vehicle alone. The cadmium-treated group was injected subcutaneously with cadmium chloride (CdCl2) dissolved in saline at a dose of 2 mL/kg/ day for 30 days, resulting in a dosage of 1 mg/kg cadmium...
February 2016: Analytical and Quantitative Cytopathology and Histopathology
Tapas Kumar Sur, Avijit Hazra, Alok Kumar Hazra, Dipankar Bhattacharyya
BACKGROUND: Bruguiera gymnorrhiza L. (family Rhizophoraceae) is a true mangrove habitat in Indian Sunderban and traditionally uses for liver disorders. OBJECTIVES: The aim was to evaluate antioxidant and hepatoprotective actions of leave extract of B. gymnorrhiza L. MATERIALS AND METHODS: Hydro-methanolic extract of mangrove leaves (BR) was standardized using spectrophotometric and high-performance thin layer chromatography methods. Radical scavenging activities were assessed in different in vitro methods, like 1,1-diphenyl-2-picrylhydrazyl, 2,2'-azino-bis-3-ethyl benzthiazoline-6-sulphonic acid (+), superoxides, nitric oxides and hydroxyl radicals...
June 2016: Journal of Basic and Clinical Pharmacy
Tanvi Gaur, P B Rao
Free radicals are responsible for several diseases like cancer, atherosclerosis, gastric ulcers, and several others. Studies have shown that mushrooms possess antioxidant activity and Macrocybe gigantea was recently added to the list of mushrooms under cultivation in India. The methanolic extracts were prepared from lyophilized and oven-dried samples of MA1 and MA2 strains of M. gigantea and their antioxidant properties were studied. MA2 showed comparatively higher total antioxidant activity (111.88 µg/mg) than MA1 (97...
2016: International Journal of Medicinal Mushrooms
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"