Heart disease is the leading cause of death in the United States and many other countries. It includes serious conditions such as heart attacks and strokes, which can be life-threatening.
For many years, doctors have worked hard to reduce the risk of heart disease by treating common problems like high blood pressure, high cholesterol, and diabetes. They also use medicines such as aspirin and statins to lower cholesterol and prevent blood clots.
These treatments have saved many lives, but heart disease is still very common. Many people continue to develop it even when they follow medical advice.
Because of this, scientists have been searching for other reasons why heart disease is so difficult to control. A new study from researchers at the University of Michigan has found an important clue.
The research focuses on a protein in the body called suPAR. This protein may play a key role in the development of heart disease and could help explain why some people get sick even without the usual risk factors.
SuPAR is made in the bone marrow and released into the bloodstream. It is part of the immune system, which helps the body fight infections. In simple terms, suPAR acts like a signal that keeps the immune system alert. This is helpful when the body needs to respond to illness. However, when suPAR levels are too high, it can cause problems.
High levels of suPAR can lead to ongoing inflammation in the body. Inflammation is the body’s natural response to injury or infection, but when it continues for a long time, it can damage healthy tissues. In the case of heart disease, this damage affects the blood vessels. Over time, it can lead to a condition called atherosclerosis.
Atherosclerosis happens when fatty substances, cholesterol, and other materials build up inside the walls of the arteries. These build-ups are called plaques. As plaques grow, they make the arteries narrower and harder. This reduces blood flow and can eventually block it completely, leading to a heart attack or stroke.
In this study, the researchers first looked at more than 5,000 people who did not yet have heart disease. They measured the levels of suPAR in their blood and followed their health over time.
They found that people with higher levels of suPAR were more likely to develop atherosclerosis and heart problems. This was true even for people who did not have high cholesterol or other common risk factors.
The researchers then studied the genetic data of about 24,000 people. They discovered that some people have certain genes that cause them to produce more suPAR. These individuals also had a higher risk of developing heart disease. This finding suggests that suPAR is not just linked to heart disease but may actually help cause it.
To confirm their results, the scientists examined even larger groups of people, totaling around 500,000 individuals. Once again, the same pattern appeared. Higher levels of suPAR were associated with a greater risk of heart problems. This strong and consistent evidence made the researchers more confident in their findings.
The team also carried out experiments on mice. They found that mice with higher suPAR levels developed more plaque in their arteries compared to normal mice. This showed that suPAR is not only connected to heart disease but may directly contribute to it.
This discovery is important because current treatments for heart disease do not target suPAR. This means that even if a person manages their cholesterol or blood pressure, high suPAR levels could still increase their risk.
Researchers are now exploring ways to reduce suPAR safely. If they succeed, it could lead to new treatments that help people who do not respond well to existing medicines.
The study also found a link between suPAR and kidney disease. Kidney disease is another common condition, affecting about one in seven people in the United States. Many people with kidney disease also have heart disease.
In fact, a large number of patients with kidney problems show signs of heart issues, and many heart patients also have kidney damage. The research suggests that suPAR may be a shared factor connecting these two diseases.
This study was led by Dr. Salim Hayek and was published in the Journal of Clinical Investigation. It highlights the importance of looking at the body as a whole system rather than focusing on just one condition at a time.
By understanding how different parts of the body are connected, scientists may find better ways to prevent and treat complex diseases like heart disease.
In summary, suPAR appears to be an important new factor in heart disease. While more research is needed, this discovery offers hope for new treatments in the future. It also reminds us that heart health is influenced by many different factors, some of which we are only beginning to understand.
If you care about heart health, please read studies about top foods to love for a stronger heart, and why oranges may help fight obesity, diabetes, and heart disease.
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