Institut for Biomedicin

Lars Bolund

Phenotypic characterization of a patient homozygous for the D558N LDL receptor gene mutation

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We describe the clinical, biochemical, and genetic features of a patient with true homozygous familial hypercholesterolemia due to the D558N low-density lipoprotein receptor gene mutation, previously designated FH Cincinnati-4. Functional flow-cytometric analysis of the LDL receptorR protein on upregulated EBV-transformed lymphocytes indicated reduction of the number of receptors on the cell surface by 87% and reduction of receptor activity by 89% compared to control cells. With drugs and a portacaval shunt operation, performed when the patient was 15 years old, serum cholesterol was reduced from about 28 to about 15 mmol/l. He died at the age of 32 of a myocardial infarction. The autopsy showed generalized atherosclerosis, especially in the coronary arteries, which were severely stenosed proximally. A rare finding was a large intracranial xanthoma that apparently had been asymptomatic.

OriginalsprogEngelsk
TidsskriftClinical Genetics
Vol/bind50
Nummer5
Sider (fra-til)388-392
Antal sider5
ISSN0009-9163
DOI
StatusUdgivet - nov. 1996

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