lipase

lipase
/luy"pays, lip"ays/, n. Biochem.
any of a class of enzymes that break down fats, produced by the liver, pancreas, and other digestive organs or by certain plants.
[1895-1900; LIP- + -ASE]

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enzyme
      any of a group of fat-splitting enzymes found in the blood, gastric juices, pancreatic secretions, intestinal juices, and adipose tissues. Lipases hydrolyze triglycerides (triglyceride) (fats) into their component fatty acid and glycerol molecules.

      Initial lipase digestion occurs in the lumen (interior) of the small intestine. Bile salts reduce the surface tension of the fat droplets so that the lipases can attack the triglyceride molecules. The fatty acid and glycerol molecules are then taken up into the epithelial cells that line the intestinal wall, where they are resynthesized into triglycerides for transport to muscles and adipose tissues (adipose tissue). At these sites lipases in the bloodstream hydrolyze the triglycerides, and the resulting fatty acids and glycerol are taken up by the cells of these tissues. In the adipose tissues triglycerides are re-formed for storage until the energy needs of the animal increase under conditions of stress or exercise. Lipases in the cells of adipose tissues break down the triglycerides so that fatty acids can reenter the bloodstream for transport to energy-requiring tissues.

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Universalium. 2010.

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  • lipase — [ lipaz ] n. f. • 1890; du gr. lipos « graisse » et ase ♦ Biochim. Enzyme qui hydrolyse les graisses neutres émulsifiées en acides gras et en glycérol. Lipase pancréatique, qui joue un rôle dans la digestion des lipides alimentaires. ● lipase nom …   Encyclopédie Universelle

  • lipase — class of enzymes, 1897, from Fr. lipase (1896), from Gk. lipos fat (see LIPO (Cf. lipo ) (v.)) + chemical ending ASE (Cf. ase) …   Etymology dictionary

  • lipase — lipase. См. липаза. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • lipase — ► NOUN Biochemistry ▪ an enzyme secreted by the pancreas that promotes the breakdown of fats. ORIGIN from Greek lipos fat …   English terms dictionary

  • lipase — [lī′pās΄, lip′ās΄] n. [ LIP(O) + ASE] any of a group of enzymes, esp. from the pancreas, that aid in digestion by hydrolyzing fats into fatty acids and glycerol …   English World dictionary

  • Lipase — A lipase is a water soluble enzyme that catalyzes the hydrolysis of ester bonds in water–insoluble, lipid substrates [cite journal |author=Svendsen A |title=Lipase protein engineering |journal=Biochim Biophys Acta |volume=1543 |issue=2… …   Wikipedia

  • Lipase — Pankreaslipase Vorhandene Strukturdaten: 1gpl …   Deutsch Wikipedia

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  • lipase — 1. In general, any fat splitting or lipolytic enzyme; a carboxylesterase; e.g., triacylglycerol l., phospholipase A2, lipoprotein l.. 2. SYN: triacylglycerol l.. * * * li·pase lip .ās, līp , .āz n any enzyme (as one secreted by the pancreas) that …   Medical dictionary

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