Biomaterial Database

Familial lecithin:cholesterol acyltransferase deficiency. Biochemistry of the cornea. 1985

A F Winder, and A Garner, and G A Sheraidah, and P Barry

Opacification of the cornea from lipid accumulation is an early and characteristic feature of familial lecithin:cholesterol acyltransferase (LCAT) deficiency. Visual impairment in a female age 48 years led to keratoplasty and the first detailed analysis of cornea in this disorder. Multilaminar figures were present, and total lipid extracts were enriched with phospholipid and cholesterol; cholesteryl esters were reduced, and accounted for about 12% of the cholesterol. Linoleate C18:2 was the predominant residue in the cholesteryl ester fatty acid fraction, with a C18:1/18:2 ratio of 1:6.5. This ratio differs from that in normal cornea, and from that in plasma and in other tissue deposits in LCAT deficiency. Various disorders of the HDL/LCAT system in plasma can lead to corneal lipid accumulation and opacification. These disorders may share general defects of lipid clearance from the cornea, but this study of LCAT cornea indicates that the character of the accumulating lipid is significantly influenced by active local metabolism, irrespective of the defect in the HDL/LCAT system also present.

UI	MeSH Term	Description	Entries
D007009	Hypolipoproteinemias	Conditions with abnormally low levels of LIPOPROTEINS in the blood. This may involve any of the lipoprotein subclasses, including ALPHA-LIPOPROTEINS (high-density lipoproteins); BETA-LIPOPROTEINS (low-density lipoproteins); and PREBETA-LIPOPROTEINS (very-low-density lipoproteins).	Hypolipoproteinemia,Hypoprebetalipoproteinemia
D007863	Lecithin Cholesterol Acyltransferase Deficiency	An autosomal recessive disorder of lipoprotein metabolism caused by mutation of LECITHIN CHOLESTEROL ACYLTRANSFERASE gene. It is characterized by low HDL-cholesterol levels, and the triad of CORNEAL OPACITIES; HEMOLYTIC ANEMIA; and PROTEINURIA with renal failure.	Dyslipoproteinemic Corneal Dystrophy,Fish-Eye Disease,LCAT Deficiency,LCATA Deficiency,Lecithin:Cholesterol Acyltransferase Deficiency,Norum Disease,alpha-LCAT Deficiency,alpha-Lecithin-Cholesterol Acyltransferase Deficiency,alpha-Lecithin:Cholesterol Acyltransferase Deficiency,Acyltransferase Deficiency, Lecithin:Cholesterol,Corneal Dystrophy, Dyslipoproteinemic,Deficiency, LCAT,Deficiency, alpha-LCAT,Fish Eye Disease,LCATA Deficiencies,alpha LCAT Deficiency
D008055	Lipids	A generic term for fats and lipoids, the alcohol-ether-soluble constituents of protoplasm, which are insoluble in water. They comprise the fats, fatty oils, essential oils, waxes, phospholipids, glycolipids, sulfolipids, aminolipids, chromolipids (lipochromes), and fatty acids. (Grant & Hackh's Chemical Dictionary, 5th ed)	Lipid
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D002849	Chromatography, Gas	Fractionation of a vaporized sample as a consequence of partition between a mobile gaseous phase and a stationary phase held in a column. Two types are gas-solid chromatography, where the fixed phase is a solid, and gas-liquid, in which the stationary phase is a nonvolatile liquid supported on an inert solid matrix.	Chromatography, Gas-Liquid,Gas Chromatography,Chromatographies, Gas,Chromatographies, Gas-Liquid,Chromatography, Gas Liquid,Gas Chromatographies,Gas-Liquid Chromatographies,Gas-Liquid Chromatography
D002855	Chromatography, Thin Layer	Chromatography on thin layers of adsorbents rather than in columns. The adsorbent can be alumina, silica gel, silicates, charcoals, or cellulose. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)	Chromatography, Thin-Layer,Thin Layer Chromatography,Chromatographies, Thin Layer,Chromatographies, Thin-Layer,Thin Layer Chromatographies,Thin-Layer Chromatographies,Thin-Layer Chromatography
D003315	Cornea	The transparent anterior portion of the fibrous coat of the eye consisting of five layers: stratified squamous CORNEAL EPITHELIUM; BOWMAN MEMBRANE; CORNEAL STROMA; DESCEMET MEMBRANE; and mesenchymal CORNEAL ENDOTHELIUM. It serves as the first refracting medium of the eye. It is structurally continuous with the SCLERA, avascular, receiving its nourishment by permeation through spaces between the lamellae, and is innervated by the ophthalmic division of the TRIGEMINAL NERVE via the ciliary nerves and those of the surrounding conjunctiva which together form plexuses. (Cline et al., Dictionary of Visual Science, 4th ed)	Corneas
D003318	Corneal Opacity	Disorder occurring in the central or peripheral area of the cornea. The usual degree of transparency becomes relatively opaque.	Leukoma,Corneal Opacities,Leukomas,Opacities, Corneal,Opacity, Corneal
D005260	Female		Females
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man