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Cleveland Clinic-Led Study Discovers Link between High Levels of Niacin - a Common B Vitamin - and Heart Disease

 
Cleveland Clinic-Led Study Discovers Link between High Levels of Niacin - a Common B Vitamin - and Heart Disease

Excess niacin fuels inflammation, cardiovascular disease through newly discovered pathway

March 21, 2024, Cleveland: Researchers from global health system Cleveland Clinic have identified a new pathway that contributes to cardiovascular disease associated with high levels of niacin, a common B vitamin previously recommended to lower cholesterol.

The team, led by Stanley Hazen, M.D., Ph.D., discovered a link between 4PY, a breakdown product from excess niacin, and heart disease. Higher circulating levels of 4PY were strongly associated with development of heart attack, stroke and other adverse cardiac events in large-scale clinical studies. The researchers also showed in preclinical studies that 4PY directly triggers vascular inflammation, which damages blood vessels and can lead to atherosclerosis over time.

The study, published in Nature Medicine, also details genetic links between 4PY and vascular inflammation. The findings provide a foundation for potential new interventions and therapeutics to reduce or prevent that inflammation.

“What’s exciting about these results is that this pathway appears to be a previously unrecognized yet significant contributor to the development of cardiovascular disease,” said Dr. Hazen, Chair of Cardiovascular and Metabolic Sciences at Cleveland Clinic’s Lerner Research Institute and Co-Section Head of Preventive Cardiology in the Heart, Vascular & Thoracic Institute. “What’s more, we can measure it, meaning there is potential for diagnostic testing. These insights set the stage for developing new approaches to counteract the effects of this pathway.”

Dr. Hazen adds, “For decades, more than 50 nations have mandated niacin (vitamin B-3) fortification in staple foods such as flour, cereals and oats to prevent disease related to nutritional deficiency.” Yet one in four subjects in the researchers’ patient cohorts appear to be getting too much, and had high levels of 4PY, which appears to contribute to cardiovascular disease development.

Dr. Hazen compares our intake of niacin as multiple taps pouring water into a bucket. Once that bucket is filled, it begins to spill over. The human body then needs to process that spill-over and produce other metabolites, including 4PY.

“The main takeaway is not that we should cut out our entire intake of niacin – that’s not a realistic approach,” said Dr. Hazen. “Given these findings, a discussion over whether continued mandates of flour and cereal fortification with niacin could be warranted.”

Dr. Hazen notes broader use of over-the-counter supplements made with different forms of niacin have also become popular because of presumed anti-aging purposes. He adds that patients should consult with their doctors before taking over-the-counter supplements and focus on a diet rich in fruit and vegetables while avoiding excess carbohydrates.

The new findings also might help explain why niacin is no longer a go-to treatment for lowering cholesterol. Niacin was one of the first treatments prescribed to lower LDL or “bad” cholesterol. However, eventually niacin showed to be less effective than other cholesterol-lowering drugs and was associated with other negative effects and higher mortality rates in previous research.

“Niacin’s effects have always been somewhat of a paradox,” Dr. Hazen said. “Despite niacin lowering of cholesterol, the clinical benefits have always been less than anticipated based on the degree of LDL reduction. This led to the idea that excess niacin caused unclear adverse effects that partially counteracted the benefits of LDL lowering. We believe our findings help explain this paradox. This illustrates why investigating residual cardiovascular risk is so critical; we learn so much more than what we set out to find.”

The study authors note that long-term investigations are needed to assess the effect of chronic elevation of 4PY levels on atherosclerosis and other phenotypes.

Dr. Hazen also directs Cleveland Clinic’s Center for Microbiome and Human Health and holds the Jan Bleeksma Chair in Vascular Cell Biology and Atherosclerosis.


Posted by : DubaiPRNetwork.com Editorial Team
Viewed 10758 times
PR Category : Healthcare & Medicine
Posted on : Thursday, March 21, 2024  1:48:00 PM UAE local time (GMT+4)
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