News tagged with lipid

Related topics: cells , cell membrane , protein , diabetes , heart disease

Low HDL-cholesterol—Not quantity, but quality

Many of the genes regulating the inflammation and immune response of the body are also associated with low HDL-cholesterol levels in the circulation, tells the recent study conducted at the University of ...

Apr 30, 2013
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Olive oil is good for you—in more ways than one

Olive oil is a key component of the Mediterranean diet and is considered by many to be a natural health-food product. Until recently, the known protective effects of olive oil against oxidative stress-associated ...

Aug 28, 2013
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Dodging antibiotic side effects

A team of scientists at the Wyss Institute for Biologically Inspired Engineering at Harvard University has discovered why long-term treatment with many common antibiotics can cause harmful side effects—and ...

Jul 03, 2013
popularity 4.5 / 5 (6) | comments 2 | with audio podcast

Lipid deficiency linked to neuron degeneration

A type of lipid that naturally declines in the aging brain impacts – within laboratory models used to study Parkinson's disease – a protein associated with the disease, according to a study co-authored by University of ...

Sep 09, 2014
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Lipid

Lipids are a broad group of naturally-occurring molecules which includes fats, waxes, sterols, fat-soluble vitamins (such as vitamins A, D, E and K), monoglycerides, diglycerides, phospholipids, and others. The main biological functions of lipids include energy storage, as structural components of cell membranes, and as important signaling molecules.

Lipids may be broadly defined as hydrophobic or amphiphilic small molecules; the amphiphilic nature of some lipids allows them to form structures such as vesicles, liposomes, or membranes in an aqueous environment. Biological lipids originate entirely or in part from two distinct types of biochemical subunits or "building blocks": ketoacyl and isoprene groups. Using this approach, lipids may be divided into eight categories: fatty acyls, glycerolipids, glycerophospholipids, sphingolipids, saccharolipids and polyketides (derived from condensation of ketoacyl subunits); and sterol lipids and prenol lipids (derived from condensation of isoprene subunits).

Although the term lipid is sometimes used as a synonym for fats, fats are a subgroup of lipids called triglycerides. Lipids also encompass molecules such as fatty acids and their derivatives (including tri-, di-, and monoglycerides and phospholipids), as well as other sterol-containing metabolites such as cholesterol. Although humans and other mammals use various biosynthetic pathways to both break down and synthesize lipids, some essential lipids cannot be made this way and must be obtained from the diet.

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