Intermediate-density lipoprotein
Intermediate-density lipoprotein (IDL) (/ɪntərˈmiːdiət dɛnsɪti laɪpəˈproʊtiːn/), is a type of lipoprotein, which is a molecule that is a combination of lipid (fat) and protein. IDLs are often considered as a transition stage between very low-density lipoprotein (VLDL) and low-density lipoprotein (LDL), hence the term "intermediate".
Etymology
The term "intermediate-density lipoprotein" is derived from the fact that the density of these lipoproteins falls between that of low-density lipoproteins and high-density lipoproteins. The term "lipoprotein" is a combination of "lipid" and "protein", indicating the composition of these molecules.
Function
IDLs play a crucial role in the transport of cholesterol and triglycerides in the body. They are formed from the degradation of very low-density lipoproteins and can be further processed by the liver to form low-density lipoproteins.
Related Terms
- Lipoprotein: A molecule that combines lipids and proteins, which transports fats around the body.
- Cholesterol: A type of fat that is carried in the blood by lipoproteins.
- Triglycerides: A type of fat that is carried in the blood by lipoproteins.
- Very low-density lipoprotein (VLDL): A type of lipoprotein that primarily carries triglycerides.
- Low-density lipoprotein (LDL): Often referred to as 'bad cholesterol', LDL carries cholesterol from the liver to the rest of the body.
- High-density lipoprotein (HDL): Often referred to as 'good cholesterol', HDL carries cholesterol from the body back to the liver.
External links
- Medical encyclopedia article on Intermediate-density lipoprotein
- Wikipedia's article - Intermediate-density lipoprotein
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