from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun One of the microscopic particles of emulsified fat found in the blood and lymph and formed during the digestion of fats.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun biology A microscopic globule of
lipoprotein, found in bloodand lymph, that is associated with the digestionof fats
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a microscopic particle of triglycerides produced in the intestines during digestion; in the bloodstream they release their fatty acids into the blood
from The American Heritage® Dictionary of the English Language, 4th Edition
from Wiktionary, Creative Commons Attribution/Share-Alike License
For cholesterol to be absorbed in the intestine, however, it would hitchhike with a chylomicron a fat and protein combination or lipoprotein.
Each chylomicron contains significant quantities of cholesterol estimated to be 40 times more than that for low-density lipoproteins LDL the so-called "bad" cholesterol.
The group following the low-fat, higher carbohydrate diet has a “substantially exaggerated” response in terms of chylomicron levels after the fat challenge than did those on the higher-protein diet.
Apo E • Present in 3 isoforms • E2, E3, E4 • Is found in Chylomicrons and IDL that binds to a specific receptor on liver cell • It is essential for the normal catabolism of triglyceride-rich lipoprotien constituent • E2 binds poorly to receptors homozygous poor clearance of chylomicron remnants and IDL • E4 associated with increased susceptibility to late onset of Alzheimer's disease 27
The liver removes the chylomicron fragments, and the cholesterol is repackaged for transport in the blood in very low-density lipoproteins (VLDLs), which eventually turn into low-density lipoproteins (LDL).
Patients with abetalipoproteinemia develop severe vitamin E deficiency because they are defective in three steps in this pathway: First, along with other fat soluble vitamins, the fat malabsorption decreases the absorption of vitamin E Second, the small amount of vitamin E that maybe absorbed can not be efficiently secreted by the intestine because of the defect in the chylomicron secretion.
LRP1 is a multifunctional endocytic receptor participating in the removal of TG-rich VLDL and chylomicron remnants in the liver
Merriam-Webster's Medical Dictionary, © 2007 Merriam-Webster, Inc. Cite This Source chylomicron chy·lo·mi·cron (kī'lō-mī'krŏn ') en Español