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

Published

Journal Article

Statins are prescribed widely to lower plasma low-density lipoprotein (LDL) concentrations and cardiovascular disease risk and have been shown to have beneficial effects in a broad range of patients. However, statins are associated with an increased risk, albeit small, of clinical myopathy and type 2 diabetes. Despite evidence for substantial genetic influence on LDL concentrations, pharmacogenomic trials have failed to identify genetic variations with large effects on either statin efficacy or toxicity, 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 treatment. 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.

Full Text

Cited Authors

  • Mangravite, LM; Engelhardt, BE; Medina, MW; Smith, JD; Brown, CD; Chasman, DI; Mecham, BH; Howie, B; Shim, H; Naidoo, D; Feng, Q; Rieder, MJ; Chen, Y-DI; Rotter, JI; Ridker, PM; Hopewell, JC; Parish, S; Armitage, J; Collins, R; Wilke, RA; Nickerson, DA; Stephens, M; Krauss, RM

Published Date

  • October 2013

Published In

Volume / Issue

  • 502 / 7471

Start / End Page

  • 377 - 380

PubMed ID

  • 23995691

Pubmed Central ID

  • 23995691

Electronic International Standard Serial Number (EISSN)

  • 1476-4687

International Standard Serial Number (ISSN)

  • 0028-0836

Digital Object Identifier (DOI)

  • 10.1038/nature12508

Language

  • eng