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Superoxide AND Quercetin

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https://www.readbyqxmd.com/read/28638888/modulation-of-key-biochemical-markers-relevant-to-stroke-by-antiaris-africana-leaf-extract-following-cerebral-ischemia-reperfusion-injury
#1
Omotayo B Ilesanmi, Afolabi C Akinmoladun, Olanrewaju Sam Olayeriju, Ibrahim Olabayode Saliu, M Tolulope Olaleye, Afolabi A Akindahunsi
BACKGROUND: Oxidative stress plays a significant role in stroke pathogenesis. Hence, plants rich in antioxidant phytochemicals have been suggested as effective remedies for prevention and treatment of stroke and other neurological diseases. Antiaris africana Engl. (Moraceae) is traditionally used for the management of brain-related problems but there is paucity of data on its anti-stroke potential. MATERIALS AND METHODS: Ischemia/reperfusion injury was induced by a 30 min bilateral common carotid artery occlusion/ 2 h reperfusion (BCCAO/R) in the brain of male Wistar rats...
2017: African Journal of Traditional, Complementary, and Alternative Medicines: AJTCAM
https://www.readbyqxmd.com/read/28636279/effects-of-in-ovo-injection-of-chrysin-quercetin-and-ascorbic-acid-on-hatchability-somatic-attributes-hepatic-oxidative-status-and-early-post-hatch-performance-of-broiler-chicks
#2
F Khaligh, A Hassanabadi, H Nassiri-Moghaddam, A Golian, G-A Kalidari
An experiment was conducted to evaluate the effects of in ovo injection of chrysin, quercetin and ascorbic acid on hatchability, somatic attributes, hepatic antioxidant status and early post-hatch growth performance of broiler chicks. Four hundred and eighty embryonated broiler breeder eggs containing live 18-day-old embryos were divided into six groups of 80 eggs each. One group remained intact and served as a control group (i), whereas the other five groups were injected with the prepared injection solutions as follows: (ii) 0...
June 21, 2017: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/28627253/protective-effects-of-quercetin-on-nicotine-induced-oxidative-stress-in-hepg2-cells
#3
Amir Yarahmadi, Fatemeh Zal, Ayeh Bolouki
Nicotine is a natural component of tobacco plants and is responsible for the addictive properties of tobacco. Nicotine has been recognized to result in oxidative stress by inducing the generation of reactive oxygen species (ROS). The purpose of this work was to estimate the hepatotoxicity effect of nicotine on viability and on antioxidant defense system in cultures of HepG2 cell line and the other hand, ameliorative effect of querctin (Q) as an antioxidant was analyzed. Nicotine induced concentration dependent loss in HepG2 cell line viability...
June 19, 2017: Toxicology Mechanisms and Methods
https://www.readbyqxmd.com/read/28551743/effects-of-deltamethrin-on-striatum-and-hippocampus-mitochondrial-integrity-and-the-protective-role-of-quercetin-in-rats
#4
Salim Gasmi, Rachid Rouabhi, Mohamed Kebieche, Samira Boussekine, Aya Salmi, Nadjiba Toualbia, Chahinez Taib, Zina Bouteraa, Hajer Chenikher, Sara Henine, Belgacem Djabri
The present work is to evaluate the neurotoxicity induced by pyrethroid insecticide "Deltamethrin" at 0.32 mg/kg/day in two main regions of the Wistar rat brain (hippocampus and striatum) and the protective effects of Quercetin at 10 mg/kg/day on this toxicity after 90 days of exposure. The assay of brain parameters showed that Deltamethrin caused a significant increase of mitochondrial metabolite level (proteins, lipids, and carbohydrates) and enzyme activity (glutathione S-transferase and superoxide dismutase); a decreased amount of mitochondrial glutathione level and catalase and glutathione peroxidase activities; and an increase of malondialdehyde (MDA) acid levels of the two regions...
May 27, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28508104/quercetin-inhibits-gout-arthritis-in-mice-induction-of-an-opioid-dependent-regulation-of-inflammasome
#5
Kenji W Ruiz-Miyazawa, Larissa Staurengo-Ferrari, Sandra S Mizokami, Talita P Domiciano, Fabiana T M C Vicentini, Doumit Camilios-Neto, Wander R Pavanelli, Phileno Pinge-Filho, Flávio A Amaral, Mauro M Teixeira, Rubia Casagrande, Waldiceu A Verri
We investigated the anti-inflammatory and analgesic effects of quercetin in monosodium urate crystals (MSU)-induced gout arthritis, and the sensitivity of quercetin effects to naloxone, an opioid receptor antagonist. Mice were treated with quercetin, and mechanical hyperalgesia was assessed at 1-24 h after MSU injection. In vivo, leukocyte recruitment, cytokine levels, oxidative stress, NFκB activation, and gp91(phox) and inflammasome components (NLRP3, ASC, Pro-caspase-1, and Pro-IL-1β) mRNA expression by qPCR were determined in the knee joints at 24 h after MSU injection...
May 15, 2017: Inflammopharmacology
https://www.readbyqxmd.com/read/28502851/inhibitory-effect-of-alliin-from-allium-sativum-on-the-glycation-of-superoxide-dismutase
#6
Shehwaz Anwar, Hina Younus
Inhibition of glycation is an important approach for alleviating diabetic complications. Alliin, the most abundant sulphur compound in garlic has been demonstrated to possess antidiabetic activity. However, there is no scientific evidence supporting its antiglycating activity. The objective of this study was to determine the inhibitory effect of alliin on glucose and methyglyoxal (MG)-induced glycation of an important antioxidant enzyme, superoxide dismutase (SOD). Glycation of SOD resulted in a decrease in enzyme activity, fragmentation/cross-linking, reduced cross-reactivity with anti-SOD antibodies, both tertiary and secondary structural changes, and formation of AGEs and fibrils...
May 11, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28494853/in-vitro-antioxidant-assessment-and-a-rapid-hptlc-bioautographic-method-for-the-detection-of-anticholinesterase-inhibitory-activity-of-geophila-repens
#7
Umesh Chandra Dash, Atish Kumar Sahoo
OBJECTIVE: Geophila repens (L.) I. M. Johnst. (Rubiaceae), a small, creeping, perennial herb, is claimed to have memory-enhancing property. The goal of this study was to assess its antioxidant and anticholinesterase activity and conduct a rapid bioautographic enzyme assay for screening acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) inhibition of G. repens extracts. METHODS: Antioxidant activity of G. repens extracts was assessed by performing 1,1-diphenyl-2-picrylhydrazyl (DPPH), nitric oxide (NO), superoxide (SOD), hydroxyl (OH) and total antioxidant capacity (TAC) assays...
May 2017: Journal of Integrative Medicine
https://www.readbyqxmd.com/read/28492713/flavonoids-and-anti-oxidant-activity-mediated-gastroprotective-action-of-leathery-murdah-terminalia-coriacea-roxb-wight-arn-leaf-methanolic-extract-in-rats
#8
Mohammed Safwan Ali Khan, Shaaz Nazan, Abdul Manan Mat Jais
BACKGROUND: Leathery Murdah, Terminalia coriacea (Roxb.) Wight & Arn. from family Combretaceae is used in Ayurveda and Siddha traditional systems of medicine to heal ulcers. OBJECTIVE: The present study was conducted to assess the gastroprotective effect and understand the fundamental mechanism of action of Leathery Murdah, Terminalia coriacea (Roxb.) Wight & Arn. Leaf Methanolic Extract. METHODS: The test extract was screened for anti-ulcer activity by Aspirin induced ulcerogenesis in pyloric ligation and ethanol induced gastric ulcers at three doses - 125, 250, and 500 mg/kg, p...
May 8, 2017: Arquivos de Gastroenterologia
https://www.readbyqxmd.com/read/28491113/antioxidant-anti-inflammatory-and-analgesic-activities-of-agrimonia-eupatoria-l-infusion
#9
Telmo N Santos, Gustavo Costa, J Pinto Ferreira, Joana Liberal, Vera Francisco, António Paranhos, Maria T Cruz, M Castelo-Branco, I Vitória Figueiredo, M Teresa Batista
Agrimony (Agrimonia eupatoria L.) (Ae) is used in traditional medicine to treat inflammatory and oxidative related diseases. Therefore, this study focuses on the anti-inflammatory and analgesic potential of Ae infusion (AeI). Phenolic compounds characterization was achieved by HPLC-PDA-ESI/MS (n) . To evaluate antioxidant potential, 2,2-diphenyl-1-picrylhydrazyl (DPPH), superoxide anion, hydroxyl radical, and SNAP assays were used. In vitro anti-inflammatory activity of AeI was investigated in LPS-stimulated macrophages by measuring the NO production...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28479737/flavonoids-from-whole-plant-of-euphorbia-hirta-and-their-evaluation-against-experimentally-induced-gastroesophageal-reflux-disease-in-rats
#10
Shyam Sundar Gupta, Lubna Azmi, P K Mohapatra, Ch V Rao
BACKGROUND: Euphorbia hirta possesses antibacterial, anti-inflammatory, galactogenic, antidiarrheal, antioxidant, hypoglycemic, antiasthmatic, antiamebic, antifungal, and antimalarial activities. OBJECTIVE: The overall objective of the current study was the investigation of the whole plant extract of E. hirta and flavonoids from E. hirta on gastroesophageal reflux disease (GERD) in rats. MATERIALS AND METHODS: The whole plant extract of E...
January 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28475686/quercitrin-and-quercetin-3-%C3%AE-d-glucoside-as-chemical-chaperones-for-the-a4v-sod1-als-causing-mutant
#11
Philbert Ip, Priya Roy Sharda, Anna Cunningham, Sumon Chakrabartty, Vijay Pande, Avijit Chakrabartty
In many cases of familial amyotrophic lateral sclerosis (ALS), mutant forms of the Cu,Zn superoxide dismutase protein (SOD1) misfold and aggregate in motor neurons. Monomers of the normally homodimeric SOD1 have been found in patient tissue, presymptomatic mouse models of ALS, and in vitro misfolding assays which suggests that monomerization might be an early step in the pathological SOD1 misfolding pathway. In this study, we targeted the dimer interface with small molecules that might act as chemical chaperones to stabilize the native dimer and prevent downstream misfolding and aggregation...
May 5, 2017: Protein Engineering, Design & Selection: PEDS
https://www.readbyqxmd.com/read/28460970/3-4-dihydroxyphenylacetic-acid-is-a-predominant-biologically-active-catabolite-of-quercetin-glycosides
#12
Yue Tang, Sayaka Nakashima, Shunya Saiki, Yui Myoi, Naomi Abe, Shoko Kuwazuru, Beiwei Zhu, Hitoshi Ashida, Yoshiyuki Murata, Yoshimasa Nakamura
Since dietary flavonoid glycosides, including quercetin 4'-glucoside from onion, are poorly absorbed from the gastrointestinal tract, they are converted into smaller phenolic acids, which can be absorbed into the circulation. The purpose of this study was to compare the effects of the major phenolic acid catabolites of quercetin 4'-glucoside, including 3,4-dihydroxyphenylacetic acid (DOPAC), 3-hydroxyphenylacetic acid, 3,4-dihydroxybenzoic acid (protocatechuic acid) and hippuric acid, on the antioxidant activity and phase II cytoprotective enzyme induction in vitro...
November 2016: Food Research International
https://www.readbyqxmd.com/read/28451725/deltamethrin-induced-alteration-of-biochemical-parameters-in-channa-punctata-bloch-and-its-amelioration-by-quercetin
#13
Parmita Bhattacharjee, Suchismita Das
We tested the impacts of pyrethroid pesticide deltamethrin and its amelioration by a flavonoid, quercetin, using tissue macromolecules (protein, amino acid, carbohydrate and glycogen) and antioxidant enzymes (superoxide dismutase, catalase and peroxidase) as biomarkers, on fish, Channa punctata, gill and liver. Our study proved that quercetin supplement alone, in the absence of pesticide, might be detrimental to fish health, in terms of depletion of major tissue macromolecules, but, such supplement may be beneficial to fish with pesticide associated oxidative stress...
June 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28411685/antihyperglycemic-antihyperlipidemic-and-antioxidant-effects-of-standard-ethanol-extract-of-bombax-ceiba-leaves-in-high-fat-diet-and-streptozotocin-induced-type-2-diabetic-rats
#14
Guang-Kai Xu, Xiao-Ying Qin, Guo-Kai Wang, Guo-Yong Xie, Xu-Sen Li, Chen-Yu Sun, Bao-Lin Liu, Min-Jian Qin
The present study aimed at exploring the therapeutic potential of standard extract of Bombax ceiba L. leaves (BCE) in type 2 diabetic mellitus (T2DM). Oral administration of BCE at doses of 70, 140, and 280 mg·kg(-1), to the normal rats and the high-fat-diet- and streptozotocin-induced T2DM rats were carried out. Effects of BCE on blood glucose, body weight, and a range of serum biochemical parameters were tested, and histopathological observation of pancreatic tissues was also performed. HPLC-ESI-Q/TOF-MS/MS analysis indicated that the chemical composition of BCE mainly contained mangiferin, isoorientin, vitexin, isomangiferin, isovitexin, quercetin hexoside, 2'-trans-O-cumaroyl mangiferin, and nigricanside...
March 2017: Chinese Journal of Natural Medicines
https://www.readbyqxmd.com/read/28407238/quercetin-hyperin-and-chlorogenic-acid-improve-endothelial-function-by-antioxidant-antiinflammatory-and-ace-inhibitory-effects
#15
Wu-Yang Huang, Lin Fu, Chun-Yang Li, Li-Ping Xu, Li-Xia Zhang, Wei-Min Zhang
In recent years, the blueberry cultivation and processing industry developed quickly because blueberries are super-fruit with healthy function. Blueberry leaves are byproducts of the blueberry industry, which are rich in bioactive phenolics, such as quercetin (Q), hyperin (H), and chlorogenic acid (C). This study investigated protective effects of 3 phenolics (Q, H, and C) from leaves of rabbiteye blueberry Vaccinium ashei on human umbilical vein endothelial cells. The results showed that all these 3 phenolics could improve endothelial function by inhibiting oxidative damage and proinflammatory cytokines caused by tumor necrosis factor-α (TNF-α)...
May 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28400803/pretreated-quercetin-protects-gerbil-hippocampal-ca1-pyramidal-neurons-from-transient-cerebral-ischemic-injury-by-increasing-the-expression-of-antioxidant-enzymes
#16
Bai Hui Chen, Joon Ha Park, Ji Hyeon Ahn, Jeong Hwi Cho, In Hye Kim, Jae Chul Lee, Moo-Ho Won, Choong-Hyun Lee, In Koo Hwang, Jong-Dai Kim, Il Jun Kang, Jun Hwi Cho, Bich Na Shin, Yang Hee Kim, Yun Lyul Lee, Seung Min Park
Quercetin (QE; 3,5,7,3',4'-pentahydroxyflavone), a well-known flavonoid, has been shown to prevent against neurodegenerative disorders and ischemic insults. However, few studies are reported regarding the neuroprotective mechanisms of QE after ischemic insults. Therefore, in this study, we investigated the effects of QE on ischemic injury and the expression of antioxidant enzymes in the hippocampal CA1 region of gerbils subjected to 5 minutes of transient cerebral ischemia. QE was pre-treated once daily for 15 days before ischemia...
February 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/28394499/antioxidant-agent-quercetin-prevents-impairment-of-bladder-tissue-contractility-and-apoptosis-in-a-rat-model-of-ischemia-reperfusion-injury
#17
Ilker Tinay, Tarik E Sener, Ozge Cevik, Selin Cadirci, Hale Toklu, Sule Cetinel, Göksel Sener, Tufan Tarcan
OBJECTIVES: To examine the possible protective effect of quercetin (QT), which is well known for its antioxidant and protective effects in circumstances of oxidative stress, on urinary bladder tissue in a rat model of ischemia/reperfusion (I/R) injury, which is a known factor for the development of lower urinary tract dysfunction partly mediated by the generation of free radicals causing oxidative damage. METHODS: Thirty male Sprague-Dawley rats were subjected to I/R injury through clamping the abdominal aorta for 30 min and then allowing reperfusion for the next 60 min...
May 2017: Lower Urinary Tract Symptoms
https://www.readbyqxmd.com/read/28376137/effects-of-tempol-and-quercetin-on-human-sperm-function-after-cryopreservation
#18
L Azadi, M Tavalaee, M R Deemeh, M Arbabian, M H Nasr-Esfahani
  BACKGROUND: Quercetin is a flavonoid with high reactive oxygen species (ROS) scavenging and ion chelating activity. It also enhances the activity of antioxidant enzymes and reduces enzymatic activity such as NADPH oxidase and NADH-dependent oxido-reductase. Tempol, as a superoxide dismutase mimetic agent, converts superoxide to less toxic hydrogen peroxide (H2O2), but cannot reduce highly toxic hydroxyl radicals in Fenton or Haber-Weiss reactions mediated with free iron or cupper. OBJECTIVE: The study was to compare the effect of Quercetin and Tempol in an optimized commercial cryo-protective media on ROS induced cryoinjury for the first time...
January 2017: Cryo Letters
https://www.readbyqxmd.com/read/28350760/involvement-of-hsp70-and-ho-1-in-the-protective-effects-of-raloxifene-on-multiple-organ-dysfunction-syndrome-by-endotoxemia-in-ovariectomized-rats
#19
Hsin-Hsueh Shen, Shieh-Yang Huang, Pao-Yun Cheng, Yen-Ju Chu, Shu-Ying Chen, Kwok-Keung Lam, Yen-Mei Lee
OBJECTIVE: Accumulating evidence demonstrates that raloxifene, a selective estrogen receptor modulator, possesses anti-inflammatory action. This study evaluates the preventive effects of long-term treatment of raloxifene on acute inflammation and multiple organ dysfunction syndrome (MODS) in ovariectomized (OVX) rats with endotoxemia and its underlying mechanism of action. METHODS: Adult female rats were OVX bilaterally to induce estrogen insufficiency. OVX rats were administered with raloxifene (1 mg/kg, gavage, once daily) for 8 weeks, beginning 1 week after surgery, followed by induction of sepsis via intravenous infusion of lipopolysaccharides (LPS; 30 mg/kg) for 4 hours...
March 27, 2017: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/28339814/modulating-oxidative-stress-relieves-stress-induced-behavioral-and-cognitive-impairments-in-rats
#20
Naimesh Solanki, Ankita Salvi, Gaurav Patki, Samina Salim
Background: Persistent psychological stress often leads to anxiety disorders and depression. Benzodiazepines and selective serotonin reuptake inhibitors are popular treatment options but have limited efficacy, supporting the need for alternative treatment. Based on our recent preclinical work suggesting a causal link between neurobehavioral deficits and elevated oxidative stress, we hypothesized that interventions that mitigate oxidative stress can attenuate/overcome neurobehavioral deficits...
February 24, 2017: International Journal of Neuropsychopharmacology
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