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Milica G. Paunović, Branka I. Ognjanović, Miloš M. Matić, Andraš Š. Štajn and Zorica S. Saičić
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Seyed Fazel Nabavi, Solomon Habtemariam, Antoni Sureda, Akbar Hajizadeh Moghaddam, Maria Daglia and Seyed Mohammad Naba
Gallic acid has been identified as an antioxidant component of the edible and medicinal plant Peltiphyllum peltatum. The present study examined its potential protective role against sodium fluoride (NaF)-induced oxidative stress in rat erythrocytes. Oxidative stress was induced by NaF administration through drinking water (1030.675 mg m-3 for one week). Gallic acid at 10 mg kg-1 and 20 mg kg-1 and vitamin C for positive controls (10 mg kg-1) were administered daily intraperitoneally for one week prior to NaF administration. Thiobarbituric acid reactive substances, antioxidant enzyme activities (superoxide dismutase and catalase), and the level of reduced glutathione were evaluated in rat erythrocytes. Lipid peroxidation in NaF-exposed rats significantly increased (by 88.8 %) when compared to the control group (p<0.05). Pre-treatment with gallic acid suppressed lipid peroxidation in erythrocytes in a dose-dependent manner. Catalase and superoxide dismutase enzyme activities and glutathione levels were reduced by NaF intoxication by 54.4 %, 63.69 %, and 42 % (p<0.001; vs. untreated control group), respectively. Pre-treatment with gallic acid or vitamin C significantly attenuated the deleterious effects. Gallic acid isolated from Peltiphyllum peltatum and vitamin C mitigated the NaF-induced oxidative stress in rat erythrocytes.
Masoumeh Khalili, Mohammad Ali Ebrahimzadeh and Yaghoub Safdari
Reactive oxygen species (ROS) can lead to haemolysis and eventually to diseases such as thalassemia and sickle cell anaemia. Their action can be counteracted by the antihaemolytic activity of therapeutic agents. The aim of our study was to identify plants that most efficiently counteract ROS-caused haemolysis. From ten plants known for their antioxidant activity (Orobanche orientalis G. Beck, Cucumis melo L., Albizzia julibrissin Durazz, Galium verum L., Scutellaria tournefortii Benth, Crocus caspius Fischer & Meyer, Sambucus ebulus L., Danae racemosa L., Rubus fruticsos L., and Artemisia absinthium L.) we prepared 30 extracts using three extraction methods (percolation, Soxhlet, and ultrasound-assisted extraction) to see whether the extraction method affects antihaemolytic efficiency, and one extraction method (polyphenol extraction) to see how much of this action is phenol-related. Extract antihaemolytic activity was determined in mice red blood cells and compared to that of vitamin C as a known antioxidant. Nine of our extracts were more potent than vitamin C, of which G. verum (aerial parts/percolation) and S. tournefortii (aerial parts/polyphenol) extracts were the most potent, with an IC50 of 1.32 and 2.08 μg mL-1, respectively. Haemolysis inhibition depended on extract concentration and the method of extraction. These plants could provide accessible sources of natural antioxidants to the pharmaceutical industry
Mohammad Najafi, Abazar Roustazadeh, Ali Asghar Moshtaghie and Mohsen Ani
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Syed M Nurulain, Peter Szegi, Kornèlia Tekes and Syed Nh Naqvi
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Deepti Srivastava, Ramlingam Subramanian, Datta Madamwar and Swaran Flora
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Ana Marija Marjanović Čermak, Ivan Pavičić and Davor Želježić
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Hoenjet KM, Dagnelie PC, Delaere KP, Wijckmans NE, Zambon JV, Oosterhof GO. Effect of a nutritional supplement containing vitamin E, selenium, vitaminC and coenzyme Q10 on serum PSA in patients with hormonally untreated carcinoma of the prostate: a randomised placebo-controlled study. Eur