News tagged with cholesterol

Related topics: heart disease · heart attack · cholesterol levels · cardiovascular disease · stroke

Sleep loss detrimental to blood vessels

Lack of sleep has previously been found to impact the activation of the immune system, inflammation, carbohydrate metabolism and the hormones that regulate appetite. Now University of Helsinki researchers have found that ...

Apr 22, 2016
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How to turn the bad guys good in hardened arteries

Hardening of the arteries, or atherosclerosis, is one of the most common cardiovascular diseases and is a common feature of ageing but it is not good news. When complex, calcified fatty plaques accumulate and develop up on ...

Apr 29, 2015
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Ring-shaped sugar helps in cases of atherosclerosis

Hardened and inflamed arteries, atherosclerosis, can be very dangerous. The consequences of atherosclerosis are among the most common causes of death in industrialized nations; in particular heart attacks and strokes. Crystalline ...

Apr 06, 2016
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Cholesterol

Cholesterol is a lipidic, waxy steroid found in the cell membranes and transported in the blood plasma of all animals. It is an essential component of mammalian cell membranes where it is required to establish proper membrane permeability and fluidity. Cholesterol is the principal sterol synthesized by animals, but small quantities are synthesized in other eukaryotes, such as plants and fungi. It is almost completely absent among prokaryotes, which include bacteria. Cholesterol is classified as a sterol.

Since cholesterol is essential for life, it is primarily synthesized de novo within the body. However excessive levels of cholesterol in blood circulation are strongly associated with progression of atherosclerosis. For an adult, typical total body cholesterol synthesis is about 1 gram per day (less if dietary intake is high) and total body cholesterol content is about 35 g. Average dietary intake in western societies is 0.2 - 0.3 grams. Cholesterol is excreted by the liver via the bile into the digestive tract. Typically about 50% of the excreted cholesterol is reabsorbed by the small bowel back into the blood stream.

The name cholesterol originates from the Greek chole- (bile) and stereos (solid), and the chemical suffix -ol for an alcohol, as François Poulletier de la Salle first identified cholesterol in solid form in gallstones, in 1769. However, it was only in 1815 that chemist Eugène Chevreul named the compound "cholesterine".

This text uses material from Wikipedia, licensed under CC BY-SA

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