Studies on the Protein Defect in Tangier Disease: ISOLATION AND CHARACTERIZATION OF AN ABNORMAL HIGH DENSITY LIPOPROTEIN

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Abstract

High density lipoproteins (d 1.063-1.210 g/ml) were isolated from the plasma of normal individuals (HDL) and seven homozygous patients with Tangier disease (HDLt). In Tangier patients, the concentration of protein in the high density region (HDLt) was only 0.5-4.5% of normal. Immunochemical studies, including mixing experiments conducted in vivo and in vitro, indicated that HDLt was different from HDL. HDLt was the only high density lipoprotein detectable in the plasma of Tangier homozygotes. In heterozygotes both HDL and HDLt were present. HDLt was not detected in the plasma of over 300 normal persons and 10 patients with secondary high density lipoprotein deficiency and appeared to be a unique marker for Tangier disease.

Authors

Samuel E. Lux, Robert I. Levy, Antonio M. Gotto, Donald S. Fredrickson