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PROGRESS IN UREMIC TOXIN RESEARCH: Resistin as a Cardiovascular and Atherosclerotic Risk Factor and Uremic Toxin

Resistin is a 12.5 kDa protein originally found to be secreted by mouse adipocytes. Whereas in rodents adipose tissue is the main source of resistin, in humans resistin is expressed primarily in macrophages. In a variety of pathophysiologic states, particularly in type 2 diabetes mellitus and in chronic kidney disease, the serum concentration of resistin is increased. Resistin reduces the glucose uptake in adipose tissue and skeletal muscle cells and may be involved in insulin resistance. A positive correlation between resistin levels and inflammatory markers has been described. Resistin has a potential role in cardiovascular disease and may contribute to an increased atherosclerotic risk by modulating the activity of endothelial cells. We recently found that resistin in concentrations measured in uremia is able to interfere with the chemotactic movement and the oxidative burst of neutrophils, cells of the first‐line nonspecific immune defense. Therefore, resistin may also contribute to the disturbed immune response and as a consequence to the increased risk of infections in uremic and diabetic subjects.