RESUMO
Background: Reactive oxygen species released on stimulation by periodontal pathogens cause oxidation of biomolecules and play significant role in periodontal disease pathogenesis. Aim: This study aimed to evaluate the levels of oxidative by?products malondialdehyde (MDA) and 8?hydroxy deoxyguanosine (8?OHdG) as biomarkers in chronic periodontitis patients compared to healthy as well as before and after nonsurgical periodontal therapy. The correlation between biomarkers and clinical attachment level was also evaluated. Settings and Design: A total of 112 subjects were included in this study. The subjects were divided into two groups (Group I included 56 healthy subjects and Group II constituted 56 chronic periodontitis patients) on the basis of clinical periodontal parameters. Materials and Methods: Group I subjects received no treatment and were evaluated once only for clinical and oxidative stress biomarker parameters. Nonsurgical periodontal therapy was carried out in Group II patients and they were evaluated at baseline and 3 months after therapy. Results: Both salivary and serum levels of MDA and 8?OHdG were found to be increased in chronic periodontitis patients as compared to healthy subjects. After nonsurgical periodontal therapy, the levels of MDA and 8?OHdG significantly reduced. Linear correlation between clinical attachment level and oxidative stress parameters was found to be positive and highly significant. Conclusion: It can be concluded that periodontal therapy is effective in improving the oxidative stress condition.
RESUMO
Oxygen is vital for aerobic processes of metabolism and respiration- It has been also implicated in many diseases and degenerative conditions. Free radicals formed from reactive oxygen and nitrogen species act as key players in the initiation and progression of tumor cells and enhance their metastatic potential. The imbalance in the formation and use of free radicals in the tissue creates oxidative stress. Inadequacy in normal cells antioxidant defense system or excessive free radical formation or even both can cause the cell to experience the oxidative stress. This review outlines the involvement of free radicals in different aspects of cancer, from prevention to initiation, progression, treatment and to reduce morbidity and mortality.
RESUMO
Background: Interception of free radical events and damage in clinical situation remain arbitrary with poor understanding on antioxidant pharmacology. Methods: Experiments on in vitro per-oxidation insult as well as assumed free radical damage situation in ischemia reperfusion are examined for profi le of malondialdehyde rise and effect of Gikgobiloba treatment by different schedule. Results: Effect of Ginkgobiloba was seen on ischemia reperfusion induced, hydrogen peroxide induced and ferric chloride induced methods. Antioxidant effect of Ginkgobiloba was consistent in all techniques. Conclusions: Results reveal the signifi cance of complementary experiment to elaborate issue of antioxidants.