Oxidative Stress and the Biological and Chemical Processes in Health

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ISSN 2176-7114 -vol. 20, n. 39, Edição Especial -Estresse Oxidativo -2020 fish. The extracts were evaluated for the percentage reduction of the 2,2-diphenyl-1-picryl-hydrazyl radical and for the content of total phenolic compounds. The lipid oxidation of the fish was analyzed by thiobarbituric acid reactive substances (TBARS) test. Based on the result, they suggest the effectiveness of the association of condiments with yerba mate in the reduction of oxidative rancidity of the tilapia fillets submitted to the different thermal processes applied, as well as the in natura product.
In the review of literature "The consumption of fruits as a potential alternative to accelerate the recovery process after high intensity exercise" the authors discussed the recent literature that used fruits to abbreviate the recovery process after high intensity exercise in different sports modalities by reducing ROS and muscle damage markers. According to the authors, nutrient supplementation can enhance recovery after high intensity exercise, particularly fruits of red-blue color such as cherries and blueberries seem to decrease oxidative stress, inflammation, and muscle damage.
In the original article "In-vitro effect of Camellia sinensis extract in human DNA leukocytes" the authors aimed to evaluate the possible genotoxic activity of the green tea extract through the evaluation of DNA damage by the Comet Assay. They concluded that the use of green tea in the diet could have many benefits for the organism, mainly for its bioactive compounds. However, they suggest that studies are necessary to evaluate its toxicity to better evaluate the safety in its use.
In the article "Effects of type 2 diabetes mellitus induction and of moderate physical exercise on the hepatic metabolism and oxidative stress in Wistar rats" the authors tested the hypothesis that the induction of Type 2 Diabetes Mellitus (T2DM) by the association of streptozotocin and high-fat diet causes hepatic alterations and that physical exercise can influence these alterations. They tested the hypothesis using males Wistar rats and induced T2DM by offering a high-fat group (HF) for 8 weeks and on the 14 th received a single dose of streptozotocin (25mg/kg). After T2DM induction, a group performed aerobic exercise. They found that the used protocol induced T2DM but not liver diseases or an increase in blood oxidative stress. Besides, physical exercise acted in synergy with high-fat diet and STZ inducing accumulation of triacylglycerol and VLDL in hepatic tissue, an effect that could either represents lipotoxicity or a protective mechanism to conserve energy.
In the study "L-glutamine supplementation associated with moderate aerobic training improves biometric, glycemic profile and antioxidant defense" the authors aimed to verify whether the L-glutamine supplementation (in its free form) could provide additional improvement in biometric, glycemic and redox parameters in animals undergoing moderate aerobic training (MAT). They found that L-glutamine supplementation increased the gastrocnemius mass and improved the glucose tolerance in animals submitted to MAT. It improved the antioxidant status in gastrocnemius, liver and pancreas, and declined it in adipose tissue in animals undergoing MAT. The drop of adipose antioxidant defense was associated with adiposity, while pancreas antioxidant activity was inversely associated with glucose intolerance.
The editors anticipate this special issue to be of interest to the scientific community. We hope researchers benefit in this issue to make further progress in the understanding of the role of ROS in the development of diseases or for the use of potential therapeutical approaches. The editors would like to thank the authors for submitting their research for publication and the reviewers for their important input and critiques to improve the manuscripts.