A statin-dependent QTL for GATM expression is associated with statin-induced myopathy


Statins are prescribed widely to lower plasma low-density lipoprotein (LDL) concentrations and cardiovascular disease risk1 and have been shown to have beneficial effects in a broad range of patients2,3. However, statins are associated with an increased risk, albeit small, of clinical myopathy4 and type 2 diabetes5. Despite evidence for substantial genetic influence on LDL concentrations6, pharmacogenomic trials have failed to identify genetic variations with large effects on either statin efficacy7,8,9 or toxicity10, and have produced little information regarding mechanisms that modulate statin response. Here we identify a downstream target of statin treatment by screening for the effects of in vitro statin exposure on genetic associations with gene expression levels in lymphoblastoid cell lines derived from 480 participants of a clinical trial of simvastatin treatment7. This analysis identified six expression quantitative trait loci (eQTLs) that interacted with simvastatin exposure, including rs9806699, a cis-eQTL for the gene glycine amidinotransferase (GATM) that encodes the rate-limiting enzyme in creatine synthesis. We found this locus to be associated with incidence of statin-induced myotoxicity in two separate populations (meta-analysis odds ratio = 0.60). Furthermore, we found that GATM knockdown in hepatocyte-derived cell lines attenuated transcriptional response to sterol depletion, demonstrating that GATM may act as a functional link between statin-mediated lowering of cholesterol and susceptibility to statin-induced myopathy.

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Figure 1: Simvastatin treatment alters transcript expression in LCLs.
Figure 2: Treatment-specific QTL associated with GATM expression.
Figure 3: GATM knockdown attenuated sterol-mediated induction of expression of SREBP-responsive genes.

Accession codes


Gene Expression Omnibus

Data deposits

The gene expression data have been deposited in the Gene Expression Omnibus (GEO) under accession number GSE36868 and in Synapse (https://www.synapse.org/) under accession number syn299510. Code and analytical output complementary to this analysis are also provided through Synapse (https://www.synapse.org/#!Synapse:syn299510). The genotype data have been deposited in the database for genotypes and phenotypes (dbGaP, http://www.ncbi.nlm.nih.gov/gap) under accession number phs000481. The full set of eQTLs identified in our study is available at http://eqtl.uchicago.edu.


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This project was funded by a grant from the US National Institutes of Health (NIH), U01 HL69757. B.E.E. was funded through the Bioinformatics Research Development Fund, supported by K. and G. Gould and NIH grant K99/R00 HG006265. M.S. was funded by NIH grant HG002585. We acknowledge the efforts of T. Kitchner and R. Mareedu for case validation in the Marshfield cohort. SEARCH was supported by the Medical Research Council, British Heart Foundation, National Health Service Genetic Knowledge Park, Centre National de Génotypage and Merck. The Heart Protection Study was funded by grants from the Medical Research Council, British Heart Foundation, Roche Vitamins and Merck. J.C.H. acknowledges support from the BHF Centre of Research Excellence, Oxford, UK. Genetic analysis in JUPITER was funded by a grant from AstraZeneca to D.I.C. and P.M.R.

Author information




L.M.M. designed experiment and analyses, generated samples, performed analyses, and wrote the manuscript. B.E.E. designed and performed analyses and wrote the manuscript. C.D.B. performed analyses of ENCODE data. B.H.M. designed and performed correlation analyses. J.D.S., M.J.R. and D.A.N. generated expression and genotype data. M.W.M. and D.N. designed, performed and analysed functional experiments. B.H. and H.S. developed and performed the imputation methodology. R.A.W, Q.F., J.D.S., M.J.R. and D.A.N. collected and genotyped the myopathy cohort from the Marshfield clinic and performed association analyses. J.C.H., S.P., J.A. and R.C. collected and genotyped myopathy cohort from the SEARCH trial and performed association analyses in that cohort along with the Heart Protection Study. J.I.R. and Y.-D.I.C. measured creatine kinase in CAP. D.I.C. and P.M.R. measured creatine kinase and performed related analyses in JUPITER. M.S. supervised, designed and contributed to analyses, and participated in manuscript development. R.M.K. supervised the project and participated in experimental design and manuscript development. M.S. and R.M.K. co-directed this project.

Corresponding authors

Correspondence to Lara M. Mangravite or Matthew Stephens or Ronald M. Krauss.

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Competing interests

The authors declare no competing financial interests.

Supplementary information

Supplementary Information

This file contains Supplementary Figures 1-5, Supplementary Methods, Supplementary Data, Supplementary Tables 2, 4, 7, 8, 9 and additional references. See separate files for Supplementary Tables 1, 3, 5 and 6. (PDF 601 kb)

Supplementary Table 1

Stable cis-eQTLs identified in association with gene expression following simvastatin exposure (treated, T), control exposure (control, C), or averaged across both exposures (averaged, S). Top eQTL listed for each gene. Significance threshold set at log10BF=3.24. (XLS 749 kb)

Supplementary Table 3

Supplementary Table 3 Stable trans-eQTLs identified in association with gene expression following simvastatin exposure (treated, T), control exposure (control, C), or averaged across both exposures (averaged, S). Significance threshold set at log10BF=7.20. (XLS 53 kb)

Supplementary Table 5

Differential cis-eQTLs identified by univariate analysis to be in association with gene expression following simvastatin exposure (treated, T), control exposure (control, C), or averaged across both exposures (averaged, S). Top eQTL listed for each gene with log10BF>2.0. Significance threshold set at log10BF=4.9. (XLS 169 kb)

Supplementary Table 6

Differential trans-eQTLs identified by univariate analysis as associated with gene expression following simvastatin exposure (treated, T), control exposure (control, C), or averaged across both exposures (averaged, S). Top eQTL listed for each gene with log10BF>5.0. Significance threshold set at log10BF=7.20. (XLS 116 kb)

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Mangravite, L., Engelhardt, B., Medina, M. et al. A statin-dependent QTL for GATM expression is associated with statin-induced myopathy. Nature 502, 377–380 (2013). https://doi.org/10.1038/nature12508

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