Lipoproteins

Lipoproteins
Complexes of lipid and protein, the way lipids travel in the blood. Cholesterol, a building block of the outer layer of cells (cell membranes), is transported through the blood in the form of water- soluble carrier molecules known as lipoproteins. The lipoprotein particle is composed of an outer shell of phospholipid, which renders the particle soluble in water; a core of fats called lipid, including cholesterol and a surface apoprotein molecule that allows tissues to recognize and take up the particle. These lipoproteins are characterized by their density: high density lipoprotein (HDL), low density lipoprotein (LDL), very low density lipoprotein (VLDL). The first stages of cholesterol build up in the blood vessels (atherosclerosis) occur when LDL particles circulating in the blood penetrate through the inner lining of blood vessels and become trapped in the artery wall. Eventual build up of LDL, fat-filled cells, cells of inflammation, and blood clotting can block the normal blood flow in the coronary arteries. This is a catastrophic event that stops the flow of nutrients and oxygen to the heart muscle, leading to heart attack (myocardial infarction).

Medical dictionary. 2011.

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Look at other dictionaries:

  • lipoproteins — lipoproteins. См. липопротеины. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • lipoproteins — An important class of serum proteins in which a lipid core with a surface coat of phospholipid monolayer is packaged with specific proteins (apolipoproteins). Classified according to density: chylomicrons, large low density particles; very low… …   Dictionary of molecular biology

  • lipoproteins — n. protein that contains a lipid and a simple protein (Chemistry) …   English contemporary dictionary

  • high density lipoproteins — Involved in cholesterol transport in serum. See lipoproteins …   Dictionary of molecular biology

  • Human plasma lipoproteins — ▪ Table Human plasma lipoproteins chylomicron VLDL IDL LDL HDL Density (g/ml) …   Universalium

  • floating beta lipoproteins — β VLDL; so called for the abnormally low density of these lipoproteins relative to their electrophoretic mobility …   Medical dictionary

  • High density lipoproteins — High density lipo|proteins [hai dạ̈nßiti lipopro̱utins; engl. high = hoch, engl. density = Dichte u. engl. lipoproteins = Lipoproteine] Mehrz.: Plasmalipoproteine im Dichtebereich von 1,063 1,210 g/ml; Abk: HDL …   Das Wörterbuch medizinischer Fachausdrücke

  • Low density lipoproteins — Low density lipo|proteins [lo̱u dạ̈nßiti lipopro̱utins; engl. low = niedrig, engl. density = Dichte u. engl. lipoproteins = Lipoproteine] Mehrz.: Plasmalipoproteine im Dichtebereich von 1,006 bis 1,063 g/ml; Abk.: LDL …   Das Wörterbuch medizinischer Fachausdrücke

  • Very low density lipoproteins — Very low density lipo|proteins [wạ̈ri lo̱u dạ̈nßiti lipopro̱utins; engl. very = sehr, engl. low = niedrig, engl. density = Dichte u. engl. lipoproteins = Lipoproteine] Mehrz.: Plasmalipoproteine im Dichtebereich von 0,9 bis 1,006 g/ml; Abk.: VLDL …   Das Wörterbuch medizinischer Fachausdrücke

  • Intermediate density lipoproteins — Inter|mediate density lipo|proteins [intermi̱djet dạ̈nßiti lipopro̲utins; engl. = Lipoproteine mittlerer Dichte] Mehrz.: Plasmalipoproteine, deren Dichtebereich zwischen den sehr niedrigen (↑VLDL) und den niedrigen (↑LDL) Proteinen liegt; Abk.:… …   Das Wörterbuch medizinischer Fachausdrücke

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