You may not yet have heard of chylomicrons, but a nutritional scientist at the University of Alberta believes you will soon--especially if you care about preventing a stroke or heart attack.
Dr. Spencer Proctor says chylomicrons gather on arterial walls and may be as dangerous or more dangerous than low-density lipoprotein (LDL) cholesterol in causing strokes and heart attacks. "We were the first in the world to label chylomicrons remnants with florescence and visually show that these particles can accumulate in arterial vessels," Proctor said. "Our next goal is to figure out why they get stuck and whether or not they play a significant role in the development of coronary artery disease--our suspicion now is that they do."
Chylomicrons are metabolized balls of fat and cholesterol that enter the blood stream through the intestines after a meal--usually within about 15 minutes after your last bite. However, because chylomicrons are processed so quickly, when a patient gives a blood sample after fasting for 12 hours or more, as per doctors usual orders, chylomicron cholesterol will usually comprise just three per cent of all the cholesterol in the sample. LDL cholesterol is the most prevalent type of cholesterol, usually comprising about 70 per cent of all cholesterols found in blood samples taken from patients who have fasted for 12 hours or more.
Ryan Smith | EurekAlert!
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