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    Biological Functional Relevance of Asymmetric Dimethylarginine (ADMA) in Cardiovascular Disease

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    There is growing evidence that increased levels of the endogenous NO synthase inhibitor asymmetric dimethylarginine (ADMA) may contribute to endothelial dysfunction. Studies in animal models as well as in humans have suggested that the increase in ADMA occurs at a time when vascular disease has not yet become clinically evident. ADMA competitively inhibits NO elaboration by displacing L-arginine from NO synthase. In a concentration-dependent manner, it thereby interferes not only with endothelium-dependent, NO-mediated vasodilation, but also with other biological functions exerted by NO. The upshot may be a pro-atherogenic state. Recently, several studies have investigated the effect of various therapeutical interventions on ADMA plasma concentrations. [...

    Quality of Life and clinical symptoms in asthmatic subjects.

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    Abstract OBJECTIVE: Quality of Life (QoL) measurements are more responsive to clinically significant changes than conventional clinical measures. The aim of the study was to evaluate the relationship between asthma symptoms and QoL in asthmatic patients. METHODS: A total of 277 asthmatics subjects, divided into three groups showing different symptoms, underwent complete clinical evaluation, baseline respiratory function, and methacholine challenge test and completed an Asthma Quality of Life Questionnaire (AQLQ). RESULTS: One hundred and forty-five subjects with asthmatic crisis, chest tightness, and dyspnea (group 3) reported a significantly lower median value in single domains and all items compared to the values scored by the 97 subjects with wheezing, rhinitis, and conjunctivitis (group 2) (p < 0.01). No statistical significance was found between the 35 patients of group 1 (with only cough) and group 3. CONCLUSIONS: The main advantage for the clinician is to evaluate important areas in which QoL could be improved and the possibility to correct and optimize compliance to chronic therapy

    Carotenoids and vitamins C and E in the prevention of cardiovascular diseaseRiccioni

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    Atherosclerotic cardiovascular diseases (CVD) are a major source of mortality and morbidity in the general population. Oxidative modification of low-density lipoprotein cholesterol (LDL-C) represents the most important determinant factor in the development and progression of atherosclerotic lesions. Oxidative damage and the production of free radicals (FRs) in the endothelium are some of the main factors involved in the pathogenesis of the atherosclerotic process that causes CVD. Appropriate nutritional practices are of central importance in managing risk and treatment of CVD; in fact, many current guidelines for a healthy general population contain nutritional recommendations to reduce the risk of these diseases. Observational studies of vitamins C and E, the most prevalent natural antioxidant vitamins, suggest that supplemental use of these vitamins may lower the risk for coronary events. Despite these data, several large, randomized controlled trials have failed to confirm the benefits of vitamin C and E in cardiovascular prevention. The aim of this review is to examine the published studies regarding the effect of vitamins (C and E) and beta-carotene supplementation in the prevention of CVD due to atherosclerosis
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