View clinical trials related to Oxidative Stress.
Filter by:Purpose/Objective of the study: The main objective of the study is to investigate oral health awareness and attitudes towards oral health among Norwegian pregnant women and assess the impact of information about oral hygiene on the risk of dental caries during pregnancy. The hypothesis of the study are: 1. The state of oral health during pregnancy depends on pregnant woman's preventive oral hygiene behaviour and practice. 2. Pregnant women with high level of oral health awareness and positive attitude towards oral health are more likely to visit their dentists regularly and have better oral hygiene compared to those with less awareness. 3. Proper information and guidance on oral hygiene care provided during pregnancy can help to improve oral bacteriological milieu and reduce the dental caries risk among pregnant women.
Both oxidative stress and Bisphenol A (BPA) had been associated with polycystic ovary syndrome (PCOS). BPA, one of endocrine-disrupting chemicals (EDCs), is an environmental estrogen used in the synthesis of plastics, is a "high-volume production" chemical with widespread human exposure. BPA was been reported in several female reproductive disturbance. However, the pathological pathway of BPA impact on female reproductive system had not been well-understood. Reactive oxygen species (ROS) have a role in the modulation of gamete quality and gamete interaction. Persistent and elevated generation of ROS leads to a disturbance of redox potential that in turn causes oxidative stress (OS). The first part of The investigators study is aim to evaluate the oxidative stress impact on the biochemical parameters in women with PCOS; the secondary part of the investigators study is to investigate the BPA on the clinical and biochemical of women with PCOS; finally, the investigators plan to test the hypothesis that BPA might increase oxidative stress and then elevated ROS in women with menstrual disturbance, furthermore, the role of oxidative stress and BPA impact on insulin resistance and metabolic disturbance will be also investigated. Study and control cases will be included. Serum total oxidant status (TOS), total antioxidant status (TAS), Bisphenol A (BPA), and clinical/biochemical parameters will be obtained for all cases. Oxidative stress and BPA will be evaluated with all clinical/biochemical parameters for all subjects.
Rationale: Extracts of the plant Salvia miltiorrhiza (Danshen) have been used as traditional Chinese medicine in the treatment of cardiovascular diseases, such as angina pectoris and myocardial infarction. Several preclinical studies point towards promising effects of Danshen on risk factors of atherosclerotic cardiovascular diseases, such as hyperlipidemia and hypertension. Objective: Our primary objective is to determine the effect of Salvia miltiorrhiza extract (Danshen) on hyperlipidemia. Secondary objective is to investigate the effect of Danshen on hypertension. Further objectives are to determine its effect on endothelial function, oxidative stress, inflammation, hemostasis and hemorheology, and on insulin sensitivity.
Insulin is secreted by cells in the pancreas called beta-cells. Beta-cell dysfunction is a critical feature of type 2 diabetes (T2DM). High glucose levels can exacerbate beta-cell dysfunction with oxidative stress proposed as a major mediator of this "glucotoxic" effect. High glucose levels have also been shown to contribute to vascular dysfunction and inflammation and these adverse responses decreased with the use of antioxidants. The hypothesis is that antioxidants improve beta-cell function in individuals with elevated glucose levels by decreasing oxidative stress. In this study the investigators will specifically test whether the antioxidant N-acetylcysteine (NAC) can improve beta-cell function in individuals with type 2 diabetes by decreasing oxidative stress. This study will be a dose finding study to determine the tolerability of 600 mg versus 1200 mg twice a day of NAC and the effects on beta-cell function, glucose tolerance and oxidative stress markers in persons with type 2 diabetes.
The purpose of this study is to compare the effect of vildagliptin vs. pioglitazone to oxidative stress on daily blood glucose fluctuations, in patients with type 2 diabetes that was inadequately controlled by metformin.
Gut hypoperfusion - reperfusion injury is an unavoidable event at the end of laparoscopic surgery. It produces oxidative stress (reactive oxygen species). Malondialdehyde have been demonstrated to be a reliable biomarker for the evaluation of oxidative stress in vivo. Propofol (2, 6 - diisopropylphenol), a highly liposoluble anaesthetic, has a potent antioxidant activity against lipid peroxidation in both in vitron and in vivo studies. On the basis of this knowledge, the investigators hypothesized that propofol has preventive effect for gut hypoperfusion - reperfusion induced injury in robot-assisted laparoscopic radical prostatectomy.
Liver fibrosis is the most serious complication of schistosomiasis mansoni. However only limited proportion of subjects with infection develop this pathology and there is limited knowledge on risk factors for the differential morbidity patterns observed in endemic communities. Our preliminary cross-sectional study indicated that serum levels of antioxidants may be related with the development of fibrosis. The present project is a randomised double blinded placebo controlled prospective study investigating the role of food based antioxidant supplements on the outcome of anti-schistosomal chemotherapy with regards to the extent of fibrosis reversal.
Obstructive Sleep Apnea (OSA) is associated with increased oxidative stress. The major sources of Reactive Oxygen Species (ROS) in the vasculature are the NADPH oxidases. Several polymorphisms related to NADPH oxidase expression or NADPH oxidase activity has been identified. The investigators are going to compare the distribution of the allelic frequencies of A-930G and C242T polymorphisms and their possible relationship with the levels of 8-isoprostanes as a marker of oxidative stress in patients with OSA and in a control group without OSA.
The proposed work is based on the detection of a novel molecule for sensitivity to oxidative stress in humans in venous blood