Risk of death in heart disease is associated with elevated urinary globotriaosylceramide.

Raphael Schiffmann, Sabrina Forni, Caren Swift, Nastry Brignol, Xiaoyang Wu, David J. Lockhart, Derek Blankenship, Xuan Wang, Paul A. Grayburn, Matthew R.G. Taylor, Brian D. Lowes, Maria Fuller, Elfrida R. Benjamin, Lawrence Sweetman

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

Elevated urinary globotriaosylceramide (Gb3) has been considered a hallmark of Fabry disease, an X-linked lysosomal disorder that is a risk factor for most types of heart disease. We screened 1421 consecutive patients with common forms of heart disease for Fabry disease by measuring urinary Gb3 in whole urine using tandem mass spectrometry, α-galactosidase A activity in dried blood spots, and we looked for GLA mutations by parallel sequencing of the whole gene (exons and introns) in pooled genomic DNA samples followed by Sanger sequencing verification. GLA variants were found in 13 patients. In the 1408 patients without GLA mutations, urinary Gb3 levels were significantly higher in heart disease patients compared to 116 apparently healthy controls (median difference=10.0 ng/mL and P<0.001). Urinary lipid profiling showed that levels of 5 other lipids significantly distinguished between urine of patients with Fabry disease (n=7) and heart disease patients with elevated urinary Gb3 (n=6). Sphingomyelin and Gb3 levels were abnormal in the left ventricular wall of patients with ischemic heart failure. Elevated levels of urinary Gb3 were independently associated with increased risk of death in the average follow-up of 17 months (hazard ratio=1.59 for increase in Gb3 of 200, 95% CI=1.36 and 1.87, and P<0.0001). In heart disease patients who do not have Fabry disease or GLA gene mutations, a higher level of urinary Gb3 is positively associated with near-term mortality. The elevation of urinary Gb3 and that of other lipids suggests that heart disease is associated with multiorgan lipid abnormalities. clinicaltrials.gov. Unique Identifier: NCT01019629.

Original languageEnglish (US)
Pages (from-to)e000394
JournalJournal of the American Heart Association
Volume3
Issue number1
DOIs
StatePublished - 2014

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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