Soluble epoxide hydrolase variant (Glu287Arg) modifies plasma total cholesterol and triglyceride phenotype in familial hypercholesterolemia

Intrafamilial association study in an eight-generation hyperlipidemic kindred

Keiko Sato, Mitsuru Emi, Yoichi Ezura, Yuko Fujita, Daisuke Takada, Tomoaki Ishigami, Satoshi Umemura, Yunpei Xin, Lily L. Wu, Stacey Larrinaga-Shum, Susan H. Stephenson, Steven Hunt, Paul N. Hopkins

Research output: Contribution to journalArticle

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Abstract

Plasma lipid and lipoprotein in general reflect the complex influences of multiple genetic loci, for instance, even familial hypercholesterolemia (FH), a representative example of monogenic hyperlipidemia, often presents with phenotypic heterogeneity. In the course of investigating familial coronary artery disease in Utah, we studied 160 members of an eight-generation extended family of FH in which 69 members were affected with type IIa hyperlipoproteinemia (HLPIIa; high plasma cholesterol) and ten with type IIb hyperlipoproteinemia (HLPIIb; high plasma cholesterol as well as plasma triglyceride). Soluble epoxide hydrolase (EPHX2, sEH) plays a role in disposition of epoxides in plasma lipoprotein particles. Intrafamilial correlation analysis of the modifier effect of Glu287Arg substitution in the EPHX2 gene was carried out among 79 LDLR mutation carriers and 81 noncarriers. In the carriers, plasma cholesterol levels were elevated among carriers of the 287Arg allele (mean ± SD = 358 ± 72 mg/dl) in comparison with 287Glu homozygotes (mean ± SD = 302 ± 72 mg/dl) (p = 0.0087). Similarly, in the LDLR mutation carriers, the plasma triglyceride levels were elevated among carriers of the 287Arg allele (mean ± SD = 260 ± 100 mg/dl) in comparison with 287Glu homozygotes (mean ± SD = 169 ± 83 mg/dl) (p = 0.020). No such gene-interactive effect was observed among noncarriers of the LDLR mutation. Half of the patients who presented with HLPIIb had inherited a defective LDLR allele as well as an EPHX2-287Arg allele, whereas the majority who presented with HLPIIa had a defective LDLR allele but not an EPHX2-287Arg allele. These results indicate a significant modification of the phenotype of FH with defective LDLR allele by EPHX2-287Arg variation in our studied kindred.

Original languageEnglish
Pages (from-to)29-34
Number of pages6
JournalJournal of Human Genetics
Volume49
Issue number1
DOIs
Publication statusPublished - 2004
Externally publishedYes

Fingerprint

Epoxide Hydrolases
Hyperlipoproteinemia Type II
Triglycerides
Alleles
Cholesterol
Phenotype
Homozygote
Mutation
Lipoproteins
Genetic Loci
Epoxy Compounds
Hyperlipidemias
Genes
Coronary Artery Disease
Lipids

Keywords

  • Familial hypercholesterolemia
  • Modifier gene
  • Single nucleotide polymorphism (SNP)
  • Soluble epoxide hydrolase
  • Triglyceride

ASJC Scopus subject areas

  • Genetics(clinical)
  • Genetics

Cite this

Soluble epoxide hydrolase variant (Glu287Arg) modifies plasma total cholesterol and triglyceride phenotype in familial hypercholesterolemia : Intrafamilial association study in an eight-generation hyperlipidemic kindred. / Sato, Keiko; Emi, Mitsuru; Ezura, Yoichi; Fujita, Yuko; Takada, Daisuke; Ishigami, Tomoaki; Umemura, Satoshi; Xin, Yunpei; Wu, Lily L.; Larrinaga-Shum, Stacey; Stephenson, Susan H.; Hunt, Steven; Hopkins, Paul N.

In: Journal of Human Genetics, Vol. 49, No. 1, 2004, p. 29-34.

Research output: Contribution to journalArticle

Sato, Keiko ; Emi, Mitsuru ; Ezura, Yoichi ; Fujita, Yuko ; Takada, Daisuke ; Ishigami, Tomoaki ; Umemura, Satoshi ; Xin, Yunpei ; Wu, Lily L. ; Larrinaga-Shum, Stacey ; Stephenson, Susan H. ; Hunt, Steven ; Hopkins, Paul N. / Soluble epoxide hydrolase variant (Glu287Arg) modifies plasma total cholesterol and triglyceride phenotype in familial hypercholesterolemia : Intrafamilial association study in an eight-generation hyperlipidemic kindred. In: Journal of Human Genetics. 2004 ; Vol. 49, No. 1. pp. 29-34.
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AU - Emi, Mitsuru

AU - Ezura, Yoichi

AU - Fujita, Yuko

AU - Takada, Daisuke

AU - Ishigami, Tomoaki

AU - Umemura, Satoshi

AU - Xin, Yunpei

AU - Wu, Lily L.

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