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. 1982 Apr;79(8):2485–2489. doi: 10.1073/pnas.79.8.2485

Tangier disease: a structural defect in apolipoprotein A-I (apoA-I Tangier).

L L Kay, R Ronan, E J Schaefer, H B Brewer Jr
PMCID: PMC346223  PMID: 6806810

Abstract

Tangier disease is a familial disorder characterized by orange tonsils, cholesterol ester deposition in reticuloendothelial cells, abnormal chylomicron remnants, and a marked reduction in high density lipoproteins. Plasma concentrations of the apolipoproteins apo-A-I and apoA-II in patients with Tangier disease are approximately 1% and 7% of those in normal subjects, respectively. Previous studies have shown that the low plasma concentrations of apoA-I and apoA-II are due to increased fractional catabolism with a relatively normal apoA-I and apoA-II synthesis. Plasma apoA-I and apoA-II were isolated to electrophoretic homogeneity from delipidated plasma lipoproteins from a patient with Tangier disease. ApoA-I Tangier differed from apoA-I from control subjects in amino acid composition, electrophoretic mobility, apparent molecular weight on sodium dodecyl sulfate/polyacrylamide gel electrophoresis, and heterogeneity of isoforms on isoelectric focusing. ApoA-II Tangier, however, appeared to be identical to normal apoA-II in amino acid composition and in immunological as well as chemical properties. These results have been interpreted as indicating that apoA-I Tangier has a different covalent structure than does normal apoA-I, and apoA-II Tangier is identical to normal apoA-II. This structural change in apoA-I Tangier is associated with rapid catabolism of apoA-I Tangier-and apoA-II Tangier-containing plasma lipoproteins, and it leads to the deficiency in high density lipoproteins, abnormal chylomicron remnants, and the intracellular accumulation of cholesterol ester characteristic of Tangier disease.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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