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The triglycerides are not stable in HDL, but are degraded by hepatic lipase so that, finally, small HDL particles are left, which restart the uptake of cholesterol from cells. [2] The cholesterol delivered to the liver is excreted into the bile and, hence, intestine either directly or indirectly after conversion into bile acids. Delivery of HDL ...
Traditionally the amount of HDL-C is used as a proxy to measure the amount of HDL particles, and from there a proxy for the reverse cholesterol transport capacity. However, a number of conditions that increase reverse cholesterol transport (e.g. being male) will reduce HDL-C due to the greater clearance of HDL, making such a test unreliable.
HDL cholesterol provides extreme benefits to the body and is vital in sustaining the fluidity of natural membranes. [6] HDL cholesterol must be maintained at a certain level to ensure normal cell growth and reproduction. The HDL capability of absorption of cholesterol and transport to the liver, aids in the removal of cholesterol in the body. [7]
In the cytosol of epithelial cells, triglycerides and cholesterol are packaged into bigger particles called chylomicrons which are amphipathic structures that transport digested lipids. [9] Chylomicrons will travel through the bloodstream to enter adipose and other tissues in the body.
All cells use and rely on fats and cholesterol as building blocks to create the multiple membranes that cells use both to control internal water content and internal water-soluble elements and to organize their internal structure and protein enzymatic systems. The outer shell of lipoprotein particles have the hydrophilic groups of phospholipids ...
1071 n/a Ensembl ENSG00000087237 n/a UniProt P11597 n/a RefSeq (mRNA) NM_000078 NM_001286085 n/a RefSeq (protein) NP_000069 NP_001273014 n/a Location (UCSC) Chr 16: 56.96 – 56.98 Mb n/a PubMed search n/a Wikidata View/Edit Human Cholesteryl ester transfer protein (CETP), also called plasma lipid transfer protein, is a plasma protein that facilitates the transport of cholesteryl esters and ...
The apolipoproteins forming the surface of the given lipoprotein particle determine from what cells cholesterol will be removed and to where it will be supplied. The largest lipoproteins, which primarily transport fats from the intestinal mucosa to the liver, are called chylomicrons. They carry mostly fats in the form of triglycerides.
It can also be sent to peripheral cells for its cholesterol and used in anabolic pathways to build molecules that the cell needs such as hormones that include a cholesterol backbone. [ 11 ] To prevent the build-up of plaque (also referred to as a lipid pool), nascent HDL molecules which are low in triglycerides, take off free fatty acids from ...