lec·i·thin

(les'i-thin),

Traditional term for 1,2-diacyl-sn-glycero-3-phosphocholines or 3-sn-phosphatidylcholines, phospholipids that on hydrolysis yield two fatty acid molecules and a molecule each of glycerophosphoric acid and choline. In some varieties of lecithin, both fatty acids are saturated, others contain only unsaturated acids (for example, oleic, linoleic, or arachidonic acid); in others again, one fatty acid is saturated, the other unsaturated. Lecithins are yellowish or brown waxy substances, readily miscible in water, in which they appear under the microscope as irregular elongated particles known as "myelin forms," and are found in nervous tissue, especially in the myelin sheaths, in egg yolk, and as essential constituents of animal and vegetable cells.

[G. lekithos, egg yolk]

Farlex Partner Medical Dictionary © Farlex 2012

phosphatidylcholine

(fŏs′fə-tīd′l-kō′lēn′)

Any of a class of phospholipids that contain a choline group and are a major component of cell membranes. Also called lecithin.

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References in periodicals archive

3.1 Analysis on Market Share of Major Polyene Phosphatidylcholine Manufacturers

China Polyene Phosphatidylcholine Markets, 2013-2017 & 2019-2023: Incidence of Viral Hepatitis, Developments, Major Manufacturers, Retail Prices, Prospects

The effect of phosphatidylcholine and deoxycholate compound injections to the localized adipose tissue: an experimental study with a murine model.

Apoptosis of Adipose-Derived Stem Cells Induced by Liposomal Soybean Phosphatidylcholine Extract

The main conclusion from the work presented above is that supplementation of the volunteers with lycopene, a powerful antioxidant, and phosphatidylcholine (PC), a membrane-stabilizing agent, ingested as a highly bioavailable combined lycosome formulation before single intake of a moderate amount of alcohol, ameliorates the increase in serum level of acetaldehyde without affecting circulating levels of ethanol and corrects some abnormalities of biological oxidation caused by alcohol intake.

Effect of Lycosome-Formulated Phosphatidylcholine on Parameters of Biological Oxidation after Single Intake of Moderate Amount of Alcohol

Jacobs, "The critical role of phosphatidylcholine and phosphatidylethanolamine metabolism in health and disease," Biochimica etBiophysica Acta (BBA)--Biomembranes, vol.

Reduction of Liver Span and Parameters of Inflammation in Nonalcoholic Fatty Liver Disease Patients Treated with Lycosome Formulation of Phosphatidylcholine: A Preliminary Report

Vance, "Phosphatidylcholine biosynthesis and lipoprotein metabolism," Biochimica et Biophysica Acta, vol.

Metabolomic Signature of Coronary Artery Disease in Type 2 Diabetes Mellitus

Cui, "Molecular distinction of phosphatidylcholine synthesis between the CDP-choline pathway and phosphatidylethanolamine methylation pathway," Journal of Biological Chemistry, vol.

Combined Supplementation of Choline and Docosahexaenoic Acid during Pregnancy Enhances Neurodevelopment of Fetal Hippocampus

Yanagita, "Dietary phosphatidylcholine alleviates fatty liver induced by orotic acid," Nutrition, vol.

Heating Has No Effect on the Net Protein Utilisation from Egg Whites in Rats

35 mg liposome nanoparticles were prepared by dissolving phosphatidylcholine into 3 mL chloroform and then by evaporation.

Effect of Chitosan and Liposome Nanoparticles as Adjuvant Codelivery on the Immunoglobulin G Subclass Distribution in a Mouse Model

The occurrence of dyserythropoiesis has been documented in a variant of hereditary stomatocytosis due to Gly796Arg mutation of the erythroid anion exchanger [24] and in one case with HX associated with hereditary high phosphatidylcholine haemolytic anaemia [17] but excluded in another PIEZO1 mutated patient described by Archer et al.

Hereditary Xerocytosis due to Mutations in PIEZO1 Gene Associated with Heterozygous Pyruvate Kinase Deficiency and Beta-Thalassemia Trait in Two Unrelated Families

Along with an increase in maintenance of total phospholipids (TP) (P < 0.01), fractions of lysophosphatidylcholine (LPC), phosphatidylserine (PS), phosphatidylethanolamine (PEA) (P < 0.05) raise and the maintenance of fractions sphingomyelin (SPM) (P < 0.01), phosphatidylcholine (PC) (P < 0.01) decreases that lead to an increase in a value of the coefficient saying of a relation between easily oxidizable (PS, PEA) to difficult oxidizable (SPM, PC).

Structure and function of erythrocyte membranes in moderate degree iron-deficiency anemia in early-age children in mountain conditions

Glynis Ablon's research on the fat-melting injections caught his eye: the active ingredient was purportedly phosphatidylcholine (PC), a nutritional supplement Rotunda knew from his post-workout protein shakes.

Powerful medicine: A lifelong passion for nutrition fuels Adam Rotunda