Lecithin cholesterol acyltransferase deficiency

Lecithin cholesterol acyltransferase deficiency
Lecithin cholesterol acyltransferase deficiency
Classification and external resources
ICD-10 E78.6
ICD-9 272.5
OMIM 245900 136120
DiseasesDB 7343
eMedicine med/1270
MeSH D007863

Lecithin cholesterol acyltransferase deficiency (LCAT deficiency) is disorder of lipoprotein metabolism.[1]

Lecithin cholesterol acyltransferase catalyzes the formation of cholesterol esters in lipoproteins.

Contents

Types

The disease has two forms:[2]

  • familial LCAT deficiency in which there is complete LCAT deficiency.
  • fish eye disease in which there is a partial deficiency.

Both are autosomal recessive disorders caused by mutations of the LCAT gene located on chromosome 16q22.

Presentation

A deficiency of LCAT causes accumulation of unesterified cholesterol in certain body tissues. Symptoms of the familial form include diffuse corneal opacities, target cell hemolytic anemia and proteinuria with renal failure. Fish eye disease only causes progressive corneal opacification.


Mortility and Morbidity

Renal failure is the major cause of morbidity and mortility in complete LCAT deficiency, while in partial deficiency(bird's eye disease) major cause for morbidity is visual impairement due to corneal opacities. These patients have low HDL Cholesterol but surprisingly premature atherosclerosis is not seen. However, There are some reported cases.


Signs and symptoms

In complete LCAT deficincy patients may present with Anemia, Corneal opacities,Hepatosplenomegaly, renal insufficiency while in partial deficiency (bird's eye disease) corneal opacities is the main finding with hepatosplenomegaly.


Diagnosis

Battery of tests are required such as CBC for anemia, kidney functions, urine for proteinurea, Lipid profile,these patients have very low HDL cholesterol and high triglyceride level,High free cholesterol and low cholesterol esters levels. However definitive diagnosis rest with LCAT gene analysis for mutation and functional activity.

References

  1. ^ Kuivenhoven JA, Pritchard H, Hill J, Frohlich J, Assmann G, Kastelein J (February 1997). "The molecular pathology of lecithin:cholesterol acyltransferase (LCAT) deficiency syndromes". J. Lipid Res. 38 (2): 191–205. PMID 9162740. http://www.jlr.org/cgi/pmidlookup?view=long&pmid=9162740. 
  2. ^ Calabresi L, Pisciotta L, Costantin A, Frigerio I, Eberini I, Alessandrini P, Arca M, Bon GB, Boscutti G, Busnach G, Frasc� G, Gesualdo L, Gigante M, Lupattelli G, Montali A, Pizzolitto S, Rabbone I, Rolleri M, Ruotolo G, Sampietro T, Sessa A, Vaudo G, Cantafora A, Veglia F, Calandra S, Bertolini S, Franceschini G (Sep 2005). "The molecular basis of lecithin:cholesterol acyltransferase deficiency syndromes: a comprehensive study of molecular and biochemical findings in 13 unrelated Italian families.". Arteriosclerosis, thrombosis, and vascular biology 25 (9): 1972–1978. doi:10.1161/01.ATV.0000175751.30616.13. ISSN 1079-5642. PMID 15994445. http://atvb.ahajournals.org/cgi/pmidlookup?view=long&pmid=15994445. 




Wikimedia Foundation. 2010.

Игры ⚽ Поможем сделать НИР

Look at other dictionaries:

  • Lecithin-cholesterol acyltransferase — (LCAT, also called phosphatidylcholine sterol O acyltransferase) is an enzyme which converts free cholesterol into cholesteryl ester (a more hydrophobic form of cholesterol) which is then sequestered into the core of a lipoprotein particle… …   Wikipedia

  • lecithin-cholesterol acyltransferase — An enzyme that reversibly transfers an acyl residue from a lecithin to cholesterol, forming a 1 acylglycerophosphocholine (a lysolecithin) and a cholesteryl ester; a deficiency of this enzyme leads to an accumulation of unesterified cholesterol… …   Medical dictionary

  • Lecithin-Cholesterin-Acyltransferase — Masse/Länge Primärstruktur 416 Aminosäuren …   Deutsch Wikipedia

  • deficiency — An insufficient quantity of some substance (as in dietary d. or hemoglobin d. in marrow aplasia); organization (as in mental d.); activity (as in enzyme d. or reduced oxygen carrying capacity of the blood), etc., of which the amount present is of …   Medical dictionary

  • Carnitine palmitoyltransferase II deficiency — Classification and external resources Carnitine ICD 9 …   Wikipedia

  • Lipoprotein lipase deficiency — Classification and external resources ICD 10 E78 OMIM 238600 DiseasesDB …   Wikipedia

  • Familial hypercholesterolemia — Classification and external resources Xanthelasma palpebrarum, yellowish patches consisting of cholesterol deposits above the eyelids. These are more common in people with FH. ICD …   Wikipedia

  • Hypocholesterolemia — is the presence of abnormally low (hypo ) levels of cholesterol in the blood ( emia). Although the presence of high cholesterol (hyper cholesterolemia) has been linked strongly with cardiovascular disease, a defect in the body s production of… …   Wikipedia

  • Tangier disease — Classification and external resources ICD 10 E78.6 ICD 9 272.5 …   Wikipedia

  • Abetalipoproteinemia — Classification and external resources Micrograph showing enterocytes with a clear cytoplasm (due to lipid accumulation) characteristic of abetalipoproteinemia. Duodenal bi …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”