Blood protein predicts risk of he...( High levels of a blood protein called m...)

Blood protein predicts risk of heart attack

High levels of a blood protein called mannose-binding lectin (MBL) are associated with lower risk of heart attack, particularly among diabetics, report Saevardottir and colleagues. They suggest that measuring this protein in the bloodstream may help doctors decide if certain patients should receive additional treatments to decrease their heart attack risk, according to a study in the January 3rd issue of The Journal of Experimental Medicine.

MBL is a protein that circulates in the blood and binds to invading microbes and prepares them for destruction by immune cells. The level of MBL protein in an individual's circulation is genetically determined and can vary drastically from person to person. Several mutations in the gene that codes for MBL result in lower than average concentrations of circulating MBL.

The authors suggest that MBL may protect against heart attack by binding to and helping clear the oxidized forms of cholesterol that build up in arteries. This type of cholesterol is abundant in diabetic patients, which may explain why high levels of MBL are particularly good news for these individuals.

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Contact: Nickey Henry
henryn@rockefeller.edu
212-327-8366
Journal of Experimental Medicine
27-Dec-2004

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