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Cytomegalovirus exacerbates atherosclerosis through an autoimmune mechanism

A new study conducted by researchers from the University of Verona and the Institute G. Gaslini in Genova, Italy, confirms the pivotal role played by Cytomegalovirus infection in the pathogenesis of atherosclerosis.

Atherosclerosis is the main cause of morbidity and mortality worldwide. Classic risk factors including smoking, diabetes, hypertension and high cholesterol levels are known to play a pivotal role in the pathogenesis of the disease that also recognises a genetic influence. However, it is well known that acute cardiovascular events may happen without the presence of the mentioned common risk factors. Recently inflammation and infectious agents have been shown to play an important role in the onset of acute cardiovascular events.

The online, open-access PLoS ONE publishes a new study on the relationship between Cytomegalovirus infection and atherosclerosis, conducted by Prof. Roberto Corrocher and Claudio Lunardi from the University of Verona and by Prof. Antonio Puccetti from the Institute G. Gaslini in Genova, Italy.

The same researchers have already shown that Cytomegalovirus infection can be responsible of the initial vascular lesions typical of the atherosclerotic process. The mechanism involved in the vascular lesion is of autoimmune origin: antibodies directed against particular proteins of the virus are able to bind molecules expressed on the surface of the cells that line the arterial walls (endothelial cells) and to cause their death (apoptosis) through a mechanism called "molecular mimicry."

Using a biocomputational technique, the new study shows that the same anti-Cytomegalovirus antibodies, isolated from patients with coronary artery disease, are able to induce the activation not only of genes involved in apoptosis but also of many other genes that encode for proteins involved in different aspects of the atherosclerotic process (lipid metabolism, inflammation, adhesion molecules, etc.). For the first
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Contact: Claudio Lunardi
claudio.lunardi@univr.it
Public Library of Science
29-May-2007


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