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Cholesterol-lowering medication accelerates depletion of plaque in arteries
Date:12/13/2011

In a new study, NYU Langone Medical Center researchers have discovered how cholesterol-lowering drugs called statins promote the breakdown of plaque in the arteries. The study was published online by the journal PLoS One on December 6, 2011.

The findings support a large clinical study that recently showed patients taking high-doses of the cholesterol-lowering medications not only reduced their cholesterol levels but also reduced the amount of plaque in their arteries. However, until now researchers did not fully understand how statins could reduce atherosclerosis, the accumulation of fat and cholesterol that hardens into plaque in arteries, a major cause of mortality in Western countries. High blood cholesterol is a major culprit in atherosclerosis. As a result of narrowing arteries, blood clots can form or plaque can break off causing blockages in vessels. This can lead to a potentially fatal heart attack or stroke.

"Our new research shows statins actually promote the regression of atherosclerosis by altering the expression of a specific cell surface receptor within plaque cells," said co-author of the study, Edward Fisher, MD, PhD, Leon H. Charney Professor of Cardiovascular Medicine and director of the Marc and Ruti Bell Vascular Biology Program at NYU Langone Medical Center. "This molecular phenomenon helps dissolve plaque by expelling coronary artery disease-causing cells from the plaque lining the arteries."

The NYU Langone study reveals how statins promote the transformation of arterial plaques by activating a protein that sits on the surface of macrophages, immune cells that are prevalent in plaque. The immune system sends macrophages to clean up cholesterol deposits in arteries, but once they fill up with the bad form of cholesterol they get stuck in the arteries, triggering the body's inflammatory response. The bloated macrophages then become major components of plaque lining artery walls.

In the study, r
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Contact: Lauren Woods
lauren.woods@nyumc.org
212-404-3555
NYU Langone Medical Center / New York University School of Medicine
Source:Eurekalert

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