Cited by 74Lipid metabolism and disordersLipoproteins and Cardiovascular HealthDiabetes, Cardiovascular Risks, and Lipoproteins

Apolipoprotein E gene mutations in subjects with mixed hyperlipidemia and a clinical diagnosis of familial combined hyperlipidemia

Solanas-Barca, María, de Castro-Orós, Isabel, Mateo-Gallego, Rocío, Cofán, Montserrat, Plana, Nuria, Puzo, José, Burillo, Elena, Martín-Fuentes, Paula +5 more·2012·Atherosclerosis

Abstract

Objective Rare mutations in the APOE gene, undetectable with the usual genotyping technique, are responsible for dominant familial dysbetalipoproteinemia (FD) and therefore could be easily misclassified as familial combined hyperlipidemia (FCHL). We aimed to identify APOE mutations associated with dominant combined hyperlipoproteinemia and to establish their frequency in subjects with a clinical diagnosis of FCHL. Methods and results In 279 unrelated subjects with FCHL in whom a functional LDLR mutation was excluded, sequencing of the entire APOE gene detected 9 carriers of a rare mutation: 5 subjects (1.8%) with the R136S mutation (arginine at residue 136 changed to serine) and 4 subjects (1.4%) with the p.Leu149del mutation, a 3-bp inframe deletion that results in the loss of leucine at position 149. Both genetic defects were detected with similar frequency (2.5% and 1.3%, respectively) in an independent group of 160 FCHL subjects from other locations in Spain. Family studies demonstrated cosegregation of these APOE mutations with hyperlipoproteinemia. R136S carriers showed dysbetalipoproteinemia, while the lipid phenotype of p.Leu149del carriers was IIa or IIb. Conclusions Rare APOE mutations are responsible for approximately 3.5% of FCHL cases in our population. APOE R136S and p.Leu149del induce autosomal dominant FD and a phenotype indistinguishable from FCHL, respectively.

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Crossref · 10.1016/j.atherosclerosis.2012.03.011

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Authors
Solanas-Barca, M., de Castro-Orós, I., Mateo-Gallego, R., Cofán, M., Plana, N., Puzo, J., Burillo, E., Martín-Fuentes, P., Ros, E., Masana, L., Pocoví, M., Civeira, F., & Cenarro, A.
Affiliations
  • Hospital Universitario Miguel Servet (ES)
  • Instituto de Salud Carlos III (ES)
  • Hospital General San Jorge (ES)
Corresponding author
Cenarro, Ana
Venue
Atherosclerosis
Publisher
Elsevier BV
Published
2012-06
Volume
222
Issue
2
Pages
449-455
ISSN
0021-9150 (ISSN-L)
OpenAlex
W2085921423
Cited by
74
References
32
Citations by year
2026: 1 · 2025: 4 · 2024: 5 · 2023: 4 · 2022: 5 · 2021: 11 · 2020: 1 · 2019: 5 · 2018: 3 · 2017: 8 · 2016: 11 · 2015: 1 · 2014: 8 · 2013: 6 · 2012: 1
FWCI
3.29
Type
journal article
Language
en
Open access
closed
Locations
  • Atherosclerosis (publishedVersion)
  • PubMed (publishedVersion)
Funders
Spanish Ministry of Health (FIS PS09/0673, FIS PS09/0665, FIS PI10/00387, RETIC C06/01 RD06/0014/0029)
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Lipid metabolism and disorders
  • Health Sciences › Medicine › Surgery › Lipoproteins and Cardiovascular Health
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes, Cardiovascular Risks, and Lipoproteins
Keywords
apolipoprotein E, familial combined hyperlipidemia, familial dysbetalipoproteinemia, mixed dyslipidemia, autosomal dominant inheritance, co-segregation, misdiagnosis, lipid phenotypes
MeSH terms
Adult, Analysis of Variance, Apolipoproteins E, DNA Mutational Analysis, Female, Gene Frequency, Humans, Hyperlipoproteinemia Type II, Hyperlipidemia, Familial Combined, Male, Middle Aged, Mutation, Pedigree, Phenotype, Receptors, LDL, Spain, Chi-Square Distribution, Odds Ratio, Genetic Predisposition to Disease

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