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Home NEWS Science News Health

Study identifies role of specific gene in hardening of blood vessel walls

Bioengineer by Bioengineer
October 29, 2019
in Health
Reading Time: 2 mins read
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Credit: Mr. Haakon Sigurslid and Dr. Rajeev Malhotra


BOSTON – Oct. 29 2019 – Arterial wall calcification is the buildup of calcium in the blood vessel walls, which can often be a predictor of serious cardiovascular events like heart attacks and strokes. Scientists have long pointed to family history as one possible cause for this hardening of the arteries, but a new study published in Nature Genetics implicates a specific gene – HDAC9 – in the calcification of the human aorta, the largest blood vessel in the body.

The study looked at more than 11,000 people and found patients with significant blood vessel calcification were more likely to have a specific variant of HDAC9. This high-risk variant of HDAC9 is present in about 25 percent of the population. In follow-up mouse studies, the researchers also found HDAC9 caused abnormal changes in the cells of the vessel walls, resembling that of human bone cells.

“Our research proved HDAC9 is not just associated with cardiovascular disease but can actually cause it by changing the makeup of those vascular cells,” said the study’s co-lead author Rajeev Malhotra, MD, of the Massachusetts General Hospital Cardiovascular Research Center. “We then investigated it at the molecular level and looked at what would happen if we knocked out HDAC9.”

The researchers found that inhibiting HDAC9 in mice preserved normal function in vascular cells and prevented vascular calcification, therefore identifying HDAC9 as a target for the potential treatment of cardiovascular disease.

“Currently, there are no heart drugs available to patients that would prevent this type of hardening of the arteries,” said Christopher J. O’Donnell, MD, MPH, of the Cardiology Divisions of Boston Veterans Administration Healthcare System and Brigham and Women’s Hospital, and also a co-lead author of the study. “These findings are exciting in that they harness genetics to open the door for future pathways to heart disease prevention.”

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The researchers’ work was funded in part by the National Institutes of Health’s National Heart Lung and Blood Institute. The authors say future studies will be needed to identify the most effective drugs for targeting HDAC9.

About the Massachusetts General Hospital

Massachusetts General Hospital, founded in 1811, is the original and largest teaching hospital of Harvard Medical School. The MGH Research Institute conducts the largest hospital-based research program in the nation, with an annual research budget of more than $1 billion and comprises more than 8,500 researchers working across more than 30 institutes, centers and departments. In August 2019 the MGH was once again named #2 in the nation by U.S. News & World Report in its list of “America’s Best Hospitals.”

Media Contact
Julie Cunningham
[email protected]
617-724-6433

Related Journal Article

http://dx.doi.org/10.1038/s41588-019-0514-8

Tags: CardiologyMedicine/HealthStroke
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