Loss-of-Function Mutations in<i>APOC3,</i>Triglycerides, and Coronary Disease
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Résumé
BACKGROUND: Plasma triglyceride levels are heritable and are correlated with the risk of coronary heart disease. Sequencing of the protein-coding regions of the human genome (the exome) has the potential to identify rare mutations that have a large effect on phenotype. METHODS: We sequenced the protein-coding regions of 18,666 genes in each of 3734 participants of European or African ancestry in the Exome Sequencing Project. We conducted tests to determine whether rare mutations in coding sequence, individually or in aggregate within a gene, were associated with plasma triglyceride levels. For mutations associated with triglyceride levels, we subsequently evaluated their association with the risk of coronary heart disease in 110,970 persons. RESULTS: An aggregate of rare mutations in the gene encoding apolipoprotein C3 (APOC3) was associated with lower plasma triglyceride levels. Among the four mutations that drove this result, three were loss-of-function mutations: a nonsense mutation (R19X) and two splice-site mutations (IVS2+1G→A and IVS3+1G→T). The fourth was a missense mutation (A43T). Approximately 1 in 150 persons in the study was a heterozygous carrier of at least one of these four mutations. Triglyceride levels in the carriers were 39% lower than levels in noncarriers (P<1×10(-20)), and circulating levels of APOC3 in carriers were 46% lower than levels in noncarriers (P=8×10(-10)). The risk of coronary heart disease among 498 carriers of any rare APOC3 mutation was 40% lower than the risk among 110,472 noncarriers (odds ratio, 0.60; 95% confidence interval, 0.47 to 0.75; P=4×10(-6)). CONCLUSIONS: Rare mutations that disrupt APOC3 function were associated with lower levels of plasma triglycerides and APOC3. Carriers of these mutations were found to have a reduced risk of coronary heart disease. (Funded by the National Heart, Lung, and Blood Institute and others.).
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La notice
- Revue
- New England Journal of Medicine
- Thématique
- Genetic Associations and Epidemiology
- Domaine
- Biochemistry, Genetics and Molecular Biology
- Établissements canadiens
- —
- Organismes subventionnaires
- National Heart, Lung, and Blood InstituteMedical Research CouncilCanadian Institutes of Health ResearchMindich Child Health and Development Institute, Icahn School of Medicine at Mount SinaiSchool of Medicine, Stanford UniversityNational Institutes of HealthHelmholtz Zentrum MünchenRegione Emilia-RomagnaNovo Nordisk FondenRheinische Friedrich-Wilhelms-Universität BonnUniversità degli Studi di VeronaTechnische Universität MünchenUmeå UniversitetUniversität zu LübeckNational Cancer InstituteKing Abdulaziz UniversityHjärt-LungfondenGeorge Washington UniversityLunds UniversitetFondation LeducqUniversity of LeicesterNational Institute of Neurological Disorders and StrokeBritish Heart FoundationRussell and Diana Hawkins Family FoundationUniversity of OttawaDeutsches Zentrum für Herz-KreislaufforschungUniversity of Texas Health Science Center at HoustonBroad InstituteUniversity of OxfordBarts and The London School of Medicine and DentistryNorges Teknisk-Naturvitenskapelige UniversitetDonovan Family FoundationUniversity of WashingtonNational Institute on AgingNational Institute for Health and Care ResearchQueen Mary University of LondonUniversità degli Studi di MilanoUniversity of Wisconsin-MilwaukeeUniversity of LeedsMassachusetts General HospitalWellcome TrustUniversity of North Carolina at Chapel HillU.S. Department of Agriculture
- Mots-clés
- Missense mutationNonsense mutationMedicineGeneticsExome sequencingInternal medicineExomeApolipoprotein BEndocrinologyMutationGeneCholesterolBiology
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- oui