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Helena Radbruch, Ronja Mothes, Daniel Bremer, Stefanie Seifert, Ralf Köhler, Julian Pohlan, Lennard Ostendorf, Robert Günther, Ruth Leben, Werner Stenzel, Raluca Aura Niesner, Anja E Hauser
In aging individuals, both protective as well as regulatory immune functions are declining, resulting in an increased susceptibility to infections as well as to autoimmunity. Nicotinamide adenine dinucleotide phosphate (NADPH) oxidase 2-deficiency in immune cell subsets has been shown to be associated with aging. Using intravital marker-free NAD(P)H-fluorescence lifetime imaging, we have previously identified microglia/myeloid cells and astrocytes as main cellular sources of NADPH oxidase (NOX) activity in the CNS during neuroinflammation, due to an overactivation of NOX...
2017: Frontiers in Immunology
Disna Kumari, Terrence Madhujith, Anoma Chandrasekara
Soluble and bound phenolic compounds were extracted from different varieties of millet types namely, finger millet, foxtail, and proso millet cultivated at dry and intermediate climatic zones in Sri Lanka. The extracts were examined for their total phenolic content (TPC), total flavonoid content (TFC), and proanthocyanidin content (PC). The antioxidant activities were meassured by reducing power (RP), trolox equivalent antioxidant capacity (TEAC), 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity, ferrous ion chelating ability (FICA), and using a β carotene linoleate model system...
May 2017: Food Science & Nutrition
Behnoosh Hossein Nia, Sirous Khorram, Hassan Rezazadeh, Abdolrasol Safaiyan, Ali Tarighat-Esfanjani
OBJECTIVE: Oxidative stress has a major role in development of diabetic complications. In this study we investigated whether clinoptilolite and nano-sized clinoptilolite could reduce hyperglycemia and oxidative stress in streptozotocin-induced diabetic rats and attempted to determine which intervention was more effective. METHODS: Thirty-six rats were randomly allocated to 2 groups; 1 group was randomly chosen as a diabetic group and injected with streptozotocin (60 mg/kg body weight in 0...
February 2018: Canadian Journal of Diabetes
Wenbo Li, Randy F Lacey, Yajin Ye, Juan Lu, Kuo-Chen Yeh, Youli Xiao, Laigeng Li, Chi-Kuang Wen, Brad M Binder, Yang Zhao
Copper ions play an important role in ethylene receptor biogenesis and proper function. The copper transporter RESPONSIVE-TO-ANTAGONIST1 (RAN1) is essential for copper ion transport in Arabidopsis thaliana. However it is still unclear how copper ions are delivered to RAN1 and how copper ions affect ethylene receptors. There is not a specific copper chelator which could be used to explore these questions. Here, by chemical genetics, we identified a novel small molecule, triplin, which could cause a triple response phenotype on dark-grown Arabidopsis seedlings through ethylene signaling pathway...
April 2017: PLoS Genetics
Camila Leandra Bueno de Almeida, Thaise Boeing, Lincon Bordignon Somensi, Viviane Miranda Bispo Steimbach, Luísa Mota da Silva, Sérgio Faloni de Andrade, Franco Delle Monache, Valdir Cechinel-Filho, Priscila de Souza
Active constituents from natural origin have long been used for the treatment of patients suffering from cardiovascular and renal diseases. This study therefore aimed to investigate the diuretic and natriuretic properties of nothofagin, a dihydrochalcone isolated from Leandra dasytricha (A. Gray) Cogn. leaves in normotensive and hypertensive rats. Male Wistar normotensive rats were orally treated with vehicle (1 ml/kg); hydrochlorothiazide (HCTZ; 25 mg/kg); ethyl acetate fraction from L. dasytricha (EALD; 3-30 mg/kg) and nothofagin (NOT; 0...
April 25, 2017: Chemico-biological Interactions
Ovidiu H Bedreag, Alexandru F Rogobete, Dorel Sandesc, Carmen A Cradigati, Mirela Sarandan, Sonia E Popovici, Raluca Dumache, Florin G Horhat, Corina Vernic, Laurentiu V Sima, Loredana Luca, Marius Papurica
BACKGROUND: One of the major causes of mortality in the world is represented by multiple traumas. Thoracic trauma is commonly associated with polytraumas. A series of physiopathological complications follow polytraumas, leading to a significant decrease in the survival rate. As a result of injuries, significant quantities of free radicals (FR) are produced, responsible for oxidative stress (OS). To minimize the effects of OS, we recommend the administration of antioxidant substances. In this study we want to highlight statistically significant correlations between antioxidant therapy and a series of clinical variables...
September 1, 2016: Clinical Laboratory
Naourez Ktari, Amal Feki, Imen Trabelsi, Mehdi Triki, Hana Maalej, Sirine Ben Slima, Moncef Nasri, Ibtissem Ben Amara, Riadh Ben Salah
A novel polysaccharide named Fenugreek Water-Soluble Polysaccharide (FWSP), consisting of a gluconic acid polymer, was isolated from fenugreek seeds. It was structurally characterized by Fourier transformed infrared (FT-IR), X-ray diffraction (XRD), High performance liquid chromatograpy (HPLC), and Nuclear magnetic resonance (NMR) spectroscopies. FT-IR and NMR spectra showed the characteristic bands of polysaccharides. According to XRD spectrum, FWSP is a semi-crystalline polymer. Functional properties of FWSP were investigated based on Water Holding Capacity (WHC), Oil Holding Capacity (OHC), emulsification activity, and foaming ability...
May 2017: International Journal of Biological Macromolecules
Hongmei Zhang, Yan Dong, Qing Su
In the present study, we investigated oxidative stress parameters and antioxidant defence status in perinatal hypothyroid rat liver and heart. We found that the proteincarbonyl content did not differ significantly between the three groups both in the pup liver and in the heart. The OH˙ level was significantly decreased in the hypothyroid heart but not in the liver compared with controls. A slight but not significant decrease in SOD activity was observed in both perinatal hypothyroid liver and heart. A significantly increased activity of CAT was observed in the liver but not in the heart of hypothyroid pups...
February 2017: Canadian Journal of Physiology and Pharmacology
Bharat Singh, Pooran M Sahu, Ram A Sharma
The flavonoids are the largest group of phenolic compounds isolated from a wide range of higher plants. These compounds work as antimicrobials, anti-insect agents and protect plants from other types of biotic and abiotic stresses. Various researchers have suggested that flavonoids possessed antioxidant, antineoplastic and cytotoxic activities. The main objective of this study was to test dichloromethane fraction of resinous exudate of Heliotropium subulatum for their antioxidant, antineoplastic and cytotoxic activities, as well as to search new antioxidant and antineoplastic agents for pharmaceutical formulations...
February 2017: Cytotechnology
David Calderón Guzman, Hugo Juárez Olguín, Ernestina Hernández García, Armando Valenzuela Peraza, Diego Zamora de la Cruz, Monica Punzo Soto
BACKGROUND: Diabetic retinopathy (DR) is one of the main complications in patients with diabetes and has been the leading cause of visual loss since 1990. Oxidative stress is a biological process resulting from excessive production of reactive oxygen species (ROS). This process contributes to the development of many diseases and disease complications. ROS interact with various cellular components to induce cell injury. Fortunately, there is an antioxidan t system that protects organisms against ROS...
January 2017: Redox Report: Communications in Free Radical Research
Hooi-Leng Ser, Loh Teng-Hern Tan, Uma D Palanisamy, Sri N Abd Malek, Wai-Fong Yin, Kok-Gan Chan, Bey-Hing Goh, Learn-Han Lee
A novel strain, Streptomyces antioxidans MUSC 164(T) was recovered from mangrove forest soil located at Tanjung Lumpur, Malaysia. The Gram-positive bacterium forms yellowish-white aerial and brilliant greenish yellow substrate mycelium on ISP 2 agar. A polyphasic approach was used to determine the taxonomy status of strain MUSC 164(T). The strain showed a spectrum of phylogenetic and chemotaxonomic properties consistent with those of the members of the genus Streptomyces. The cell wall peptidoglycan was determined to contain LL-diaminopimelic acid...
2016: Frontiers in Microbiology
Xiang-Lan Wei, Ru-Tang Fang, Yong-Hua Yang, Xue-Yuan Bi, Guo-Xia Ren, A-Li Luo, Ming Zhao, Wei-Jin Zang
BACKGROUND: Liver fibrosis is a feature in the majority of chronic liver diseases and oxidative stress is considered to be its main pathogenic mechanism. Antioxidants including vitamin E, are effective in preventing liver fibrogenesis. Several plant-drived antioxidants, such as silymarin, baicalin, beicalein, quercetin, apigenin, were shown to interfere with liver fibrogenesis. The antioxidans above are polyphenols, flavonoids or structurally related compounds which are the main chemical components of Pomegranate peels and seeds, and the antioxidant activity of Pomegranate peels and seeds have been verified...
October 27, 2015: BMC Complementary and Alternative Medicine
Karsten Schrör, Bernhard H Rauch
Aspirin is an unique compound because it bears two active moieties within one and the same molecule: a reactive acetyl group and the salicylate metabolite. Salicylate has some effects similar to aspirin, however only at higher concentrations, usually in the millimolar range, which are not obtained at conventional antiplatelet aspirin doses of 100-300 mg/day. Pharmacological actions of aspirin in the cardiovascular system at these doses are largely if not entirely due to target structure acetylation. Several classes of lipid mediators become affected: Best known is the cyclooxygenase-1 (COX-1) in platelets with subsequent inhibition of thromboxane and, possibly, thrombin formation...
September 2015: Prostaglandins & Other Lipid Mediators
O A Vrzhesinskaia, N A Beketova, O V Kosheleva, Z V Karagodina, O G Pereverzeva, V M Zhminchenko, V M Kodentsova, A V Vasil'ev
The full replacement of fatty component of a diet (10% of feed mass, sunflower-seed oil and lard 1:1) on enriched with alpha-tocopherol acetate fish oil or on linen oil under additional coenzyme Q10 intake (100 mg per 1 kg body weight) within 12 months led to a significant vitamin A blood serum decrease on 23-31%, 2-2,8 fold fall of vitamin E blood serum level and vitamin C rat liver diminution due to significant dehydroascorbic acid reduction on 28-45%. In both cases, the intensification of POL was not observed...
2012: Voprosy Pitaniia
Xiao-Peng Liu, Zong-Gen Peng, Gui-Yang Guo
No abstract text is available yet for this article.
November 2003: Chinese Journal of Applied Physiology
C Alberti
Genetic factors and their interactions with environmental conditions and internal microenvironment influence the prostate cancer (PC) development, so that gene expression couldn't strictly occur on the basis of reductionist determinisms of DNA causality but should also conform to multifactorial and stochastic events, moreover, considering the pre-RNA alternative splicing-mediated multi-protein assemblying mechanisms. Nevertheless, after age and ethnic background, the strongest epidemiological risk factor for PC is a positive family history...
January 2010: European Review for Medical and Pharmacological Sciences
A N Beliaev, E A Rygin, A N Zakhvatov, A N Gulin, A G Gruznov
No abstract text is available yet for this article.
2007: Khirurgiia
Nareman M Abdel-Naeem, Nagwa F Kandell, Azza A El-Shamaa, Tarek M Harba, Afaf A Abdel-Hady
Oxidative stress has been shown in (ESRD) patients specially those receiving regular haemodialysis (HD) in relation with an increased production of toxic free radicals due to membrane-induced complement leukocyte activation. An imbalance between oxidants and antioxidans has been suggested in uremic patients on HD. The respective influence of uremia and dialysis procedure has not been evaluated. Studies that have probed into the mechanism of oxygen radical production have implicated the bio-incompatibility of dialysis membranes...
December 2005: Journal of the Egyptian Society of Parasitology
A A Ramadan, A A Ghoniem, H M Hassan, A E Youssef
The effect of different concentrations of three antioxidans on phagocytic and kill activities of blood polymorphonuclear leukocytes (PMN) isolated from buffaloes during the peripartum period (4 weeks before to 7 weeks after parturition) was investigated in this study. Two concentrations of beta-carotene and vitamin A (10(-6) and 10(-5) M) and one concentration of Se (10(-9) M) were used. Phagocytic activity of PMN treated with beta-carotene (10(-6)M) significantly enhanced (P < 0.05) after parturition (Week 0 until Week 3), whereas the kill activity of the same cells significantly (P < 0...
February 1, 2001: Theriogenology
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