Heart disease is still the leading cause of death in the United States and many other parts of the world. For decades, doctors and scientists have focused on well-known risk factors such as high cholesterol, high blood pressure, and diabetes.
Treatments like statins and aspirin have helped many people reduce their risk. However, even with these advances, many individuals still suffer from heart attacks and strokes.
This has led researchers to search for other causes that may not be fully understood. Now, a new study from the University of Michigan has identified a protein in the body that may play a major role in heart disease. This protein is called suPAR, and it is produced by the immune system.
Heart disease often develops through a process known as atherosclerosis. This happens when fatty deposits, known as plaques, build up inside the arteries. Over time, these plaques can narrow the arteries and reduce blood flow.
If a plaque breaks open, it can block blood flow completely, leading to a heart attack or stroke. Atherosclerosis affects more than a billion people worldwide, making it one of the most serious health problems today.
SuPAR, which stands for soluble urokinase plasminogen activator receptor, is made in the bone marrow. It helps control how the immune system responds to different situations.
Scientists have known for some time that people with higher levels of suPAR tend to have a higher risk of heart disease. However, it was not clear whether suPAR was simply a warning sign or if it actually caused the disease.
In this new research, scientists found strong evidence that suPAR is not just a marker but a direct cause of atherosclerosis. They first studied more than 5,000 people who did not have heart disease at the beginning of the study.
They discovered that people with higher suPAR levels were much more likely to develop atherosclerosis over time. This was true even when other risk factors, such as cholesterol levels and blood pressure, were taken into account.
To further explore this link, the researchers carried out a genetic study involving 24,000 people. They identified a variation in a gene called PLAUR, which controls how much suPAR the body produces. People with this genetic variation had higher levels of suPAR in their blood and were more likely to develop atherosclerosis.
The researchers then expanded their analysis using data from about 500,000 participants in the UK Biobank, one of the largest health databases in the world. They also confirmed their findings in two additional large groups of people. These results strengthened the conclusion that suPAR plays a direct role in causing artery disease.
To make sure their findings were accurate, the scientists also performed experiments using mice. They increased suPAR levels in some mice and compared them with mice that had normal levels.
The mice with higher suPAR developed more plaque in their arteries, showing clear signs of atherosclerosis. This provided strong evidence that suPAR is not just linked to heart disease but can actively drive its development.
This discovery is important because current treatments do not target suPAR. Most existing medications focus on lowering cholesterol or controlling blood pressure.
While these treatments are effective, they do not address all possible causes of heart disease. This may explain why some people still develop heart problems even when their traditional risk factors are well managed.
The research team, led by Dr. Salim Hayek, is now working on ways to reduce suPAR levels safely. If successful, this could open up a new way to prevent and treat heart disease. Instead of only focusing on cholesterol and blood pressure, doctors may one day be able to target the immune system directly.
The study also helps explain why heart disease and kidney disease are often linked. Many people with kidney problems also develop heart disease, and vice versa. High levels of suPAR may be a common factor connecting these conditions, offering a new understanding of how they are related.
This research was published in the Journal of Clinical Investigation. It shows how important it is to continue exploring new ideas in medicine. By understanding the role of the immune system in heart disease, scientists may be able to develop more effective and personalized treatments in the future.
For patients, this discovery offers hope. It suggests that there may soon be new ways to reduce the risk of heart attacks and strokes, especially for those who do not respond fully to current treatments. As research continues, targeting suPAR could become an important part of protecting heart health and improving lives.
If you care about heart disease, please read studies that herbal supplements could harm your heart rhythm, and how eating eggs can help reduce heart disease risk.
For more health information, please see recent studies that apple juice could benefit your heart health, and results showing yogurt may help lower the death risks in heart disease.
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