Asymptomatic homozygous hypobetalipoproteinemia associated with apolipoprotein B45.2.

Abstract:

:Familial hypobetalipoproteinemia is caused by apolipoprotein (apo) B gene mutations and is frequently associated with a truncated apo-B protein in the plasma. Homozygosity for mutations yielding a truncated apo-B is extremely rare; fewer than five true homozygotes have been described in the world's literature. These patients typically have normal levels of triglycerides and virtually absent low density lipoprotein (LDL) cholesterol. The clinical status of these patients is variable, ranging from asymptomatic in two homozygotes who synthesized a truncated apo-B (apo-B87) to severe neurological disease resulting from vitamin E deficiency in a homozygote who synthesized a shorter apo-B (apo-B50). In this report, we describe a 48-year-old female homozygous for a nonsense mutation resulting in an even shorter apo-B, apo-B45.2. Although this individual had virtually no LDL cholesterol, she was asymptomatic and had normal plasma levels of vitamin E. This case demonstrates that homozygosity for an apo-B mutation associated with a relatively short apo-B truncation can be completely asymptomatic.

journal_name

Hum Mol Genet

journal_title

Human molecular genetics

authors

Young SG,Bihain B,Flynn LM,Sanan DA,Ayrault-Jarrier M,Jacotot B

doi

10.1093/hmg/3.5.741

subject

Has Abstract

pub_date

1994-05-01 00:00:00

pages

741-4

issue

5

eissn

0964-6906

issn

1460-2083

journal_volume

3

pub_type

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