• American heart journal · May 2014

    Galectin-3 is independently associated with cardiovascular mortality in community-dwelling older adults without known cardiovascular disease: The Rancho Bernardo Study.

    • Lori B Daniels, Paul Clopton, Gail A Laughlin, Alan S Maisel, and Elizabeth Barrett-Connor.
    • Division of Cardiology, Department of Medicine, University of California at San Diego, La Jolla, CA; Department of Family and Preventive Medicine, University of California at San Diego, San Diego, CA. Electronic address: lbdaniels@ucsd.edu.
    • Am. Heart J. 2014 May 1;167(5):674-82.e1.

    BackgroundGalectin-3 is a marker of myocardial fibrosis that has been implicated in the pathophysiologic pathway of fibrosis; its association with all-cause and cardiovascular disease (CVD) mortality in a community-based cohort free of baseline CVD has not been reported. Our aim was to determine the association between galectin-3 levels and all-cause and CVD mortality in community-dwelling older adults without known CVD.MethodsWe measured plasma galectin-3 levels in 1,393 Rancho Bernardo Study participants without CVD with a mean age of 70 years. Participants were followed up for a mean of 11 years for coronary heart disease, CVD mortality, and all-cause mortality.ResultsDuring follow-up, 436 participants died (169 from CVD). In models adjusted for traditional CVD risk factors and renal function, galectin-3 was a significant predictor of CVD mortality (hazard ratio [HR] per SD log increase 1.30, 95% CI 1.10-1.53) and all-cause mortality (HR 1.12, 1.01-1.24), but not coronary heart disease (HR 1.09, 0.92-1.30). After further adjusting for N-terminal pro B-type natriuretic peptide, galectin-3 remained an independent predictor (HR 1.24, 1.05-1.47) of CVD mortality. Galectin-3 improved the c statistic (0.847-0.851, P = .003) for prediction of CVD death. Net reclassification improvement (>0) with the addition of galectin-3 was 35% (P < .0001); the integrated discrimination index was also significant (P = .03). Participants with both galectin-3 and N-terminal pro B-type natriuretic peptide above the median had increased risk of CVD death vs those with higher levels of only 1 of these markers (HR 1.74, 1.24-2.43).ConclusionHigher levels of galectin-3 are independently associated with all-cause and CVD mortality among community-dwelling older adults with no known CVD at baseline.Copyright © 2014 Mosby, Inc. All rights reserved.

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