View clinical trials related to Oxidative Stress.
Filter by:This study was designed to be a 3 year, 3 phases project, and will explore the therapeutic effects from near-infrared transcranial photobiomodulation (NIR tPBM) in major depressive disordered human subjects, and it's biological mechanisms in cellular and animal model. However, due to shortage of funding under the pandemics, the project is now modified to start from its clinical part first, and will continue to its basic parts later when funding resources in place.
Cardiovascular disease (CVD), a cluster of disorders that affect heart and blood vessels, is the leading cause of morbidity and mortality around the world and is responsible for 17.9 million deaths annually worldwide. CVD risk factors can be modifiable (nutrition, physical activity, obesity, smoking, hyperlipidemia, hypertension and diabetes) and non-modifiable (age, gender, ethnicity, family history and socioeconomic status). Chronic exposure to CVD risk factors induces oxidative stress and promotes inflammation. In addition, endothelial cells in response to the inflammatory reaction secrete growth factors, leading to the destruction of vascular endothelium and promoting atherogenesis. Oxidative stress refers to the imbalance between anti-oxidant and pro-oxidant compounds, with predominance of the pro-oxidant ones. Reactive Oxygen Species overproduction has been implicated in pathogenesis and complications of numerous diseases including diabetes, cardiovascular diseases, cancer, neurodegenerative diseases and chronic kidney disease. Moreover, endothelium consists of a single layer of endothelial cells; it is the natural barrier between blood and tissues and also an endocrine organ. It plays a key role in vascular homeostasis by maintaining a balance between vasodilation and vasoconstriction and is responsible for fluid filtration, blood vessel tone, hormone trafficking, hemostasis, regulation of blood flow and growth of blood vessels. Thus, reductions in endothelial function are detrimental and predict and precede the development of overt CVD. Sesame belongs to Pedaliaceae family and can be consumed in different forms such as seeds, oil or tahini, i.e., a 100 % peeled, ground and roasted sesame paste. Sesame seeds are rich in polyunsaturated fatty acids, proteins, vitamin E and lignans, such as sesamin, sesamolin and sesamol. Recent studies have highlighted the antioxidant, antihypertensive, hypolipidemic and appetite control properties of sesame seeds and sesame oil. Regarding the consumption of tahini and its effect on human health, only three studies are available in the current literature, one of them in patients with type 2 diabetes, one in diabetic animal model and one in Alzheimer's disease animal model. Thus, the aim of the present study is to investigate the effect of tahini consumption on oxidative stress, blood pressure, endothelial function and arterial stiffness in healthy males postprandially.
This clinical study evaluates the effect of 500 mg of 2S-hesperidin for 8 weeks on performance (power generated in different metabolic zones), body composition (fat and muscle mass) and biochemical (antioxidant, inflammatory status) and metabolic (capillary blood in finger) markers in amateur cyclists. Our hypothesis is that chronic intake of 2S-hesperidin can improve performance (maximum power generated). To justify this hypothesis, we measured the parameters mentioned above, which could establish a cause-effect relationship between 2S-hesperidin intake and possible yield improvement.
Introduction: SARS-CoV2 infection produces severe pneumonia with pulmonary alveolar collapse. There is no specific treatment to date. In experimental models and humans with septic shock, there is a high production of nitric oxide (NO) and reactive nitrogen species (RNS) and can cause multiple organ failure. The administration of antioxidants such as n-acetylcysteine (NAC), vitamin C, melatonin, and vitamin E participate in increasing the intracellular content of GSH, ROS sequestration, protection of the lipids of cell membranes, cytosol proteins, nuclear DNA, mitochondrial and decrease LPO. Justification: as there is no specific antiviral therapy, the therapeutic options are limited, complications and mortality are high; It is intended to evaluate the effect of antioxidants on the storm outcome of the dysregulation of oxidative stress. Hypothesis: It is postulated that adjuvant therapy with antioxidants and Pentoxifylline reduces the use of ventilators in patients with or without septic shock secondary to severe SARS-COV2 pneumonia as decreases lipoperoxidation, and corrects dysregulation of oxidative stress by increasing the antioxidant capacity. Objectives: To evaluate whether it is possible to avoid intubation or decrease assisted mechanical ventilation days, improve oxidative stress dysregulation in patients with SARS-COV2 infection with severe pneumonia with or without septic shock. Methodology: Quasi-experimental, open analytical, prospective, and longitudinal study (before-after). In patients over 18 years of age who are admitted to the CITIBANAMEX Center with or without septic shock secondary to severe SARS-COV2 pneumonia. There will be two groups: 1) patients without septic shock and 2) patients with septic shock secondary to severe pneumonia due to SARS-COV2. A single antioxidant will be applied following the clinical decision tree (NAC, Vit C, Vit E, melatonin) more Pentoxifylline orally or by orogastric tube for a total of 5 days from the start of the protocol. APACHE II will calculate the risk, SOFA, MEXSOFA, measurements of IL-8, vitamin C, NO3 / NO2, LOP, total antioxidant capacity will be carried out at baseline and 48 hours. SOFA will be calculated for seven days, in addition to days of hospitalization, days of mechanical ventilation. It was evaluated 28 days after discharge by telephone.
Randomized controlled trial of acute use of electronic cigarette or tobacco cigarette on parameters of ventricular repolarization and inflammation/oxidative stress.
Out-of-hospital cardiac arrest (OHCA) is one of the leading cause of death in the world. In Slovenia approximately 25% of resuscitated patients survives to discharge from hospitals, usually with poorer functional status. One of key pathophysiological process responsible for poorer functional status is global hypoxic-ischemic injury, which is two-stage. Primary stage occurs immediately after cardiac arrest due to cessation of blood flow. With return of spontaneous circulation a secondary injury occurs, of which the leading process is an imbalance between oxygen delivery and consumption. Reperfusion exposes ischemic tissue to oxygen, resulting in the formation of large amounts of highly reactive oxygen species (ROS) within minutes. ROS lead to oxidative stress, which causes extensive damage to cell structures and leads to cell death. Consequently, necrosis and apoptosis are responsible for organ dysfunction and functional outcome of these patients. Such injury of neural tissue causes brain damage, which is ultimately responsible for poor neurological and thus functional outcome of OHCA survivors. The extent of brain damage can be determined in several ways: clinically by assessing quantitative and qualitative consciousness and the presence of involuntary movements in an unconscious patient, by assessing activity on electroencephalographic record, by imaging of the brain with computed tomography and magnetic resonance imaging, as well as by assessing levels of biological markers of brain injury. Of the latter, the S-100b protein and neuron-specific enolase have been shown to be suitable for such assessment. Oxidative stress is counteracted by the body with endogenous antioxidants that balance excess free radicals and stabilize cellular function. Vitamin C (ascorbic acid) is the body's main antioxidant and is primarily consumed during oxidative stress. Large amounts of ROS rapidly depletes the body's vitamin C stores. Humans cannot synthesise vitamin C and enteral uptake of vitamin C is limited by transporter saturation. On the other hand, parenteral (venous) dosing of vitamin C can achieve concentrations of vitamin C above physiological and thus produce a stronger antioxidant effect. The beneficial effect of parenteral dosing of vitamin C has been establish in several preclinical and clinical studies in patients with ischemic stroke and cardiac arrest. The investigators hypothesize that there is a similarly beneficial effect of vitamin C in survivors of OHCA.
A comparison of acute tart cherry formations (juice vs. powdered) and doses (single vs. twice daily) on inflammation and oxidative capacity.
Because of cellular changes in response to ischemia and a following period of reperfusion, damages to organs and different tissues occur. There are several ongoing studies to enlighten the pathophysiological processes underlying these damages inflicted by ischemia/reperfusion. Gases (CO2) with low water content are used in pneumoperitoneum, which is a procedure to inflate the abdominal cavity with an appropriate gas for laparoscopic operations. In the current literature, it was shown that due to a restricted blood flow during the gas insufflation, ischemia develops and with the reperfusion of the organ in deflation period, oxidative stress and inflammation increases, leading to ischemia/reperfusion-related organ and tissue damages. In the proposed study, biomarkers for ischemia/reperfusion-inflicted damage will be evaluated in a biochemical and histopathological perspective in biopsy samples of ovaries from a young patient group in which hysterectomy and bilateral salpingo-oophorectomy will be performed, laparoscopically.
In the current study the investigators intend to evaluate the mode of anesthesia on ischemia modified albumin and outcome in patients with traumatic brain injury undergoing emergency craniotomy
- General Objective To evaluate the effects of curcumin supplementation on cardiovascular risk markers, inflammation, oxidative stress and functional capacity in participants with coronary artery disease. Specific Objectives Assess, before and after supplementation with turmeric: - The nutritional status of the participants; - Blood pressure; - Atherogenic risk; - The expression of transcription factors (Nrf2 and NF-kB), antioxidant enzymes (NQO1, HO-1, sirtuin 1 (SIRT-1)), NLPR3 receptor, as well as the levels of inflammatory cytokines (IL-6, tumor necrosis factor-alpha (TNF-α), protein C reactive (PCR), IL-1, IL 18) and vascular cell adhesion protein 1 (VCAM-1) and E-selectin adhesion molecules; - Routine biochemical parameters; - Lipid peroxidation and oxidized LDL; - The 6-minute walk test, the recovery heart rate and the chair lift test; - Modifiable risk factors before and after supplementation; - The comparison of all parameters between groups.