chylomicron

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chylomicron

 [ki″lo-mi´kron]
a particle of the class of lipoproteins responsible for the transport of exogenous cholesterol and triglycerides from the small intestine to tissues after meals. Chylomicrons are spherical particles with a core of triglycerides surrounded by a layer of phospholipids, cholesterol, and apolipoproteins.

chy·lo·mi·cron

, pl.

chy·lo·mi·cra

,

chy·lo·mi·crons

(kī'lō-mī'kron, -mī'kră, -mi'kronz),
A large lipid droplet (up to 100 mm in diameter) of reprocessed lipid synthesized in epithelial cells of the small intestine and containing triacylglycerols, cholesterol esters, and several apolipoproteins (for example, A-I, B-48, C-I, C-II, C-III, E); the least dense (less than 1.006 g/mL) of the plasma lipoproteins that function as transport vehicles.
[chylo- + G. micros, small]

chylomicron

/chy·lo·mi·cron/ (-mi´kron) a class of lipoproteins that transport exogenous (dietary) cholesterol and triglycerides after meals from the small intestine to tissues for degradation to chylomicron remnants.

chylomicron

(kī′lō-mī′krŏn′)
n.
A lipoprotein formed in the small intestine that transports dietary fats and cholesterol through the lymphatic system to the bloodstream. Chylomicrons are larger and less dense than very-low-density lipoproteins.

chylomicron

[kī′lōmī′kron]
Etymology: Gk, chylos + mikros, small
minute lipoproteins measuring less than 0.5 μm in diameter. Chylomicrons consist of about 90 triglycerides with small amounts of cholesterol, phospholipids, fat-soluble vitamins, and protein. They are synthesized in the GI tract and carry dietary fat from the intestinal mucosa via the thoracic lymphatic duct into the plasma and ultimately to the liver and tissues. The remnant chylomicron particles are removed by the liver.

chy·lo·mi·cron

, pl. chylomicra, pl.chylomicrons (kī'lō-mī'kron, -kră,-kronz)
A droplet of reprocessed lipid synthesized in epithelial cells of the small intestine; the least dense of the plasma lipoproteins.
[chylo- + G. micros, small]

chylomicron

the form in which fat is transported from the gut to the rest of the body, consisting of a lipid core surrounded by an envelope of protein, cholesterol and phospholipid. Chylomicrons are around 100 nm across and are formed in the intestinal mucosa, from where they enter the LACTEALS and eventually the bloodstream.

chylomicron

a stable droplet containing principally triglyceride fat, but also cholesterol, phospholipids and protein; found in intestinal lymphatics (lacteals) and blood during and after meals.

chylomicron test
in chilled serum, chylomicrons rise to form a creamy top layer and the serum clears; very low-density lipoproteins remain dispersed and the serum is turbid. Called also the refrigeration test.