Clinical variant of Tangier disease in Japan: mutation of the ABCA1 gene in hypoalphalipoproteinemia with corneal lipidosis.
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Ishii J, Nagano M, Kujiraoka T, Ishihara M, Egashira T, Takada D, Tsuji M, Hattori H, Emi M
Clinical variant of Tangier disease in Japan: mutation of the ABCA1 gene in hypoalphalipoproteinemia with corneal lipidosis.
J Hum Genet. 2002;47(7):366-9.
- PubMed ID
- 12111371 [ View in PubMed]
- Abstract
Despite progress in molecular characterization, specific diagnoses of disorders belonging to a group of inherited hypoalphalipoproteinemias, i.e., apolipoprotein AI deficiency, lecithin-cholesterol acyltransferase deficiency, Tangier disease (TD), and familial high-density lipoprotein (HDL) deficiency, remain difficult on a purely clinical basis. Several TD patients were recently found to be homozygous for mutations in the ABCA1 gene. We have documented here a clinical variant of TD in a Japanese patient who manifested corneal lipidosis and premature coronary artery disease as well as an almost complete absence of HDL-cholesterol, by identifying a novel homozygous ABCA1 mutation (R1680W). We propose that patients with apparently isolated HDL deficiency who are found to carry ABCA1 mutations may in fact belong to a category of TD patients whose phenotypic features are only partially expressed, and that a number of hidden clinical variants of TD might exist among other HDL deficiency patients who have escaped correct clinical diagnosis.