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Diet-Induced Heart Diseases can be Prevented

by Bidita Debnath on February 14, 2016 at 4:26 AM
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 Diet-Induced Heart Diseases can be Prevented

Stanley Hazen, MD, PhD, Chair of Cellular and Molecular Medicine, and colleagues made a landmark discovery four years ago linking intestinal bacteria to heart disease.

His team found that when our digestive systems digest the nutrients carnitine and choline (abundant in red meat and eggs, respectively), a bacterial waste product called TMAO is formed. They showed that high levels of TMAO are associated with higher rates of heart attack, stroke and cardiac death.

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Now, Dr. Hazen's team has discovered a naturally occurring TMAO inhibitor called DMB, which is found in some cold-pressed extra virgin olive oils and grape seed oils. DMB blocks the production of TMAO and reduces atherosclerosis (hardening of the arteries) in mice fed a diet containing high levels of choline. The discovery was published in the December 17, 2015, issue of the prestigious journal Cell.

This exciting discovery opens the door to preventing diet-induced heart disease by targeting the intestinal, or "gut," bacteria. Heart disease is the number one killer in the United States, a fact which is commonly associated with the typical "Western" diet. Therefore, a therapeutic intervention may help save the lives of some of the nearly 400,000 Americans who die each year of heart disease.
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Interestingly, although DMB targets a bacterial pathway, it is not an antibiotic. Therefore, its use will not contribute to antibiotic overuse or resistance, which is a worldwide health crisis.

"Many chronic diseases like atherosclerosis, obesity and diabetes are linked to gut microbes," said Dr. Hazen. "These studies demonstrate the exciting possibility that we can prevent or retard the progression of diet-induced heart diseases starting in the gut. This opens the door in the future for new types of therapies for atherosclerosis, as well as other metabolic diseases."

Dr. Hazen is also section head of Preventive Cardiology & Rehabilitation in the Miller Family Heart & Vascular Institute at Cleveland Clinic. He holds the Jan Bleeksma Chair in Vascular Cell Biology and Atherosclerosis and the Leonard Krieger Chair in Preventive Cardiology. Zeneng Wang, PhD, first author on the Cell publication, is also a member in the Department of Cellular & Molecular Medicine in the Lerner Research Institute.

Source: Newswise
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