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Garcia, S.C., Grotto, D., Bulcao, R.P., Moro, A.M., Roehrs, M., Valentini, J., de Fretas, F.A., Paniz, C., Bubols, G.B. and Charao, M.F. (2012) Evaluation of lipid damage related to pathological and physiological conditions. Drug and Chemical Toxicology, Epub ahead of print. doi:10.3109/01480545.2012.720989

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• TITLE: Oxidative stress and its complications in human health

  AUTHORS: Guniz M. Koksal

  KEYWORDS: Oxidative Stress; Release Oxygen Radicals; Anti-Oxidative Defense; Choric Diseases

  JOURNAL NAME: Advances in Bioscience and Biotechnology, Vol.3 No.8, December 12, 2012

  ABSTRACT: Under normal physiological conditions, a homeostatic balance exists between the formation of oxgyen radicals (ROS) and their removal by endogenous scavenging antioxidants. An imbalance between oxidants and antioxidants that is in favor of the oxidants potentially leading to damage is termed “oxidative stress”. Mitochondria are a major producer of ROS, which mainly consists of superoxide anion, hydrogen peroxide, and hydroxyl radical. Especially, during systemic inflammatory response syndrome, sepsis, septic shock, there is an overproduction of ROS while the natural antioxidant mechanisms are weakened, mainly because of endothelial cell damage. General anesthesia can impair the immunological defense mechanisms while inducing an inflammatory reaction in alveolar macrophages. In chronic diseases and high mortality situations like sepsis, oxidative/antioxidative equilibrium shifts to the direction of oxidative stress. When elderly patients with chronic diseases and patients with sepsis undergo surgical operations, anesthesia and anesthetic agents used increases the oxidative stress in addition to the surgical trauma. Thence many studies are ongoing on the antioxidant drugs and enzymes. We must never forget to take the oxidative stress of our patients into account while planning their treatments.