Galectin-3 Protein Can Predict Higher Risk of Heart Failure, Death in Older Adults
Heart failure has enormous risk of death, often few warning signs
Aug. 31, 2012 If you are a senior citizen, it is almost a certainty you have wondered about the chances that your heart
will fail. Well, if you really want to know, a way to answer the question may have arrived. Government scientists have discovered a protein
galectin-3 that identifies which people are at higher risk of heart failure.
This research, supported by the National Heart, Lung, and Blood Institute (NHLBI), is based on work from the NHLBI's
Framingham Heart Study, which began in 1948 and has been the leading source of research findings about heart disease risk factors. Daniel
Levy, M.D., director of the Framingham Heart Study is a coauthor on the study done by researchers with the Framingham project.
"Galectin-3, a Marker of Cardiac Fibrosis, Predicts Incident Heart Failure in the Community," is published online in the
Journal of the American College of Cardiology and will be in the October 2 print issue.
Good news may warrant changes to current heart failure prevention guidelines of American Heart Association that say coffee drinking
may be risky for heart patients; bit of bad news - excess coffee bad!
Heart failure occurs when the heart cannot fill with enough blood and/or pump enough blood to meet the body's needs.
Galactin-3 (sometimes referred to as, Gal-3) has recently been associated with cardiac fibrosis, a condition in which scar tissue replaces
heart muscle, and cardiac fibrosis plays an important role in the development of heart failure.
Heart failure carries enormous risk for death or a lifetime of disability and often there are few warning signs of
impending heart failure. Measuring levels of galectin-3 in the blood may offer a way to identify high-risk individuals who could benefit from
treatments to prevent debilitating heart failure and death.
Early identification of predisposed individuals would allow treatment to begin long before heart failure develops and
could help people at high risk for heart failure to live longer, more active lives.
Galectin-3 levels were measured in 1996-1998 as part of a routine examination of 3,353 participants enrolled in the
Offspring Cohort of the Framingham Heart Study.
At the time of measurement the average age of the participants was 59 years old. During an average follow-up of 11 years,
166 participants (5.1 percent) had a first heart failure event.
Among the 25 percent of people with the highest galectin-3 levels (ranging from 15.4 to 52.1 nanograms per milliliter)
the annual rate of heart failure was 12 per 1,000 people compared with 3 per 1,000 people for the 25 percent of participants with the lowest
galectin-3 levels (ranging from 3.9 to 12 nanograms per milliliter).
Fifty-three percent of participants were women.
Spironolactone and other related drugs believed to counteract cardiac fibrosis have been shown to improve outcomes in
heart failure patients. Future research will be needed to determine whether treatment with these or other drugs can benefit healthy patients
with elevated galectin-3 levels.
Part of the National Institutes of Health, the National Heart, Lung, and Blood Institute (NHLBI) plans, conducts, and
supports research related to the causes, prevention, diagnosis, and treatment of heart, blood vessel, lung, and blood diseases; and sleep
disorders. The Institute also administers national health education campaigns on women and heart disease, healthy weight for children, and
other topics. NHLBI press releases and other materials are available online at
About the National Institutes of Health (NIH): NIH, the nation's medical research agency, includes 27 Institutes
and Centers and is a component of the U.S. Department of Health and Human Services. NIH is the primary federal agency conducting and
supporting basic, clinical, and translational medical research, and is investigating the causes, treatments, and cures for both common and
rare diseases. For more information about NIH and its programs, visit
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