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Association of Triglyceride-Lowering LPL Variants and LDL-C-Lowering LDLR Variants with Risk of Coronary Heart Disease

Research output: Contribution to journalArticle

  • Brian A. Ference
  • John J.P. Kastelein
  • Kausik K. Ray
  • Henry N. Ginsberg
  • M. John Chapman
  • Chris J. Packard
  • Ulrich Laufs
  • Clare Oliver-Williams
  • Angela M. Wood
  • Adam S. Butterworth
  • Emanuele Di Angelantonio
  • John Danesh
  • Stephen J. Nicholls
  • Deepak L. Bhatt
  • Marc S. Sabatine
  • Alberico L. Catapano
Original languageEnglish
Pages (from-to)364-373
Number of pages10
JournalJAMA - Journal of the American Medical Association
Volume321
Issue number4
DOIs
DateAccepted/In press - 17 Dec 2018
DatePublished (current) - 29 Jan 2019

Abstract

Importance: Triglycerides and cholesterol are both carried in plasma by apolipoprotein B (ApoB)-containing lipoprotein particles. It is unknown whether lowering plasma triglyceride levels reduces the risk of cardiovascular events to the same extent as lowering low-density lipoprotein cholesterol (LDL-C) levels. Objective: To compare the association of triglyceride-lowering variants in the lipoprotein lipase (LPL) gene and LDL-C-lowering variants in the LDL receptor gene (LDLR) with the risk of cardiovascular disease per unit change in ApoB. Design, Setting, and Participants: Mendelian randomization analyses evaluating the associations of genetic scores composed of triglyceride-lowering variants in the LPL gene and LDL-C-lowering variants in the LDLR gene, respectively, with the risk of cardiovascular events among participants enrolled in 63 cohort or case-control studies conducted in North America or Europe between 1948 and 2017. Exposures: Differences in plasma triglyceride, LDL-C, and ApoB levels associated with the LPL and LDLR genetic scores. Main Outcomes and Measures: Odds ratio (OR) for coronary heart disease (CHD) - defined as coronary death, myocardial infarction, or coronary revascularization - per 10-mg/dL lower concentration of ApoB-containing lipoproteins. Results: A total of 654783 participants, including 91129 cases of CHD, were included (mean age, 62.7 years; 51.4% women). For each 10-mg/dL lower level of ApoB-containing lipoproteins, the LPL score was associated with 69.9-mg/dL (95% CI, 68.1-71.6; P = 7.1 × 10 -1363 ) lower triglyceride levels and 0.7-mg/dL (95% CI, 0.03-1.4; P =.04) higher LDL-C levels; while the LDLR score was associated with 14.2-mg/dL (95% CI, 13.6-14.8; P = 1.4 × 10 -465 ) lower LDL-C and 1.9-mg/dL (95% CI, 0.1-3.9; P =.04) lower triglyceride levels. Despite these differences in associated lipid levels, the LPL and LDLR scores were associated with similar lower risk of CHD per 10-mg/dL lower level of ApoB-containing lipoproteins (OR, 0.771 [95% CI, 0.741-0.802], P = 3.9 × 10 -38 and OR, 0.773 [95% CI, 0.747-0.801], P = 1.1 × 10 -46 , respectively). In multivariable mendelian randomization analyses, the associations between triglyceride and LDL-C levels with the risk of CHD became null after adjusting for differences in ApoB (triglycerides: OR, 1.014 [95% CI, 0.965-1.065], P =.19; LDL-C: OR, 1.010 [95% CI, 0.967-1.055], P =.19; ApoB: OR, 0.761 [95% CI, 0.723-0.798], P = 7.51 × 10 -20 ). Conclusions and Relevance: Triglyceride-lowering LPL variants and LDL-C-lowering LDLR variants were associated with similar lower risk of CHD per unit difference in ApoB. Therefore, the clinical benefit of lowering triglyceride and LDL-C levels may be proportional to the absolute change in ApoB.

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    Rights statement: This is the final published version of the article (version of record). It first appeared online via JAMA at https://doi.org/10.1001/jama.2018.20045 . Please refer to any applicable terms of use of the publisher.

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