Most people think brushing and flossing are only important for keeping teeth clean and avoiding bad breath.
However, new research shows that oral health may also play an important role in protecting the heart, especially after a heart attack.
A recent study from Tokyo Medical and Dental University in Japan, published in the International Journal of Oral Science, has found a surprising link between a common mouth bacterium and how well the heart heals after a heart attack. The findings suggest that poor oral health may make heart recovery more difficult.
To understand this, it helps to first know what happens during a heart attack. A heart attack occurs when blood flow to the heart muscle is blocked, usually by a clot in the coronary arteries. These arteries supply oxygen and nutrients to the heart. When the blood flow stops, heart muscle cells begin to die because they do not get enough oxygen.
After a heart attack, the body tries to limit damage and repair the heart. One important process involved in this repair is called autophagy. This is a natural system where cells clean out damaged parts and recycle them. It helps keep cells healthy and allows the heart to recover after injury.
The researchers focused on a bacterium called Porphyromonas gingivalis. This bacterium is commonly found in the mouth and is known to cause gum disease. Gum disease is very common, especially in adults, and can lead to swollen, bleeding gums and tooth loss if not treated.
Scientists had already found this bacterium in different parts of the body, including areas affected by heart disease. However, it was not clear how it might affect the heart after a heart attack. To explore this, the research team studied a substance produced by the bacterium called gingipain.
Gingipain is a type of protein that helps the bacterium damage tissues and avoid the body’s defenses. It is considered one of the main reasons why this bacterium can cause disease. The researchers wanted to see how gingipain affects heart cells during recovery.
To do this, they created a version of the bacterium that did not produce gingipain. They then compared how this modified bacterium and the normal bacterium affected heart cells and mice after a heart attack.
The results were clear. Heart cells exposed to the bacterium without gingipain were healthier and survived better. In contrast, cells exposed to the normal bacterium showed more damage. In mice, those infected with the normal bacterium had worse heart damage after a heart attack than those infected with the modified version.
The researchers discovered that gingipain interferes with the autophagy process. Normally, damaged materials inside cells are collected and then broken down so the cell can function properly. But gingipain blocks an important step in this process. As a result, harmful materials build up inside heart cells.
This buildup causes more damage and makes it harder for the heart to heal. In the mice, this led to larger heart cells and more serious injury to the heart muscle.
These findings are important because they show a direct way that oral bacteria can affect heart health. It is not just about bacteria entering the bloodstream. It is also about how substances produced by these bacteria can interfere with the body’s natural healing processes.
This study suggests that people with gum disease may have a higher risk of poor recovery after a heart attack. It also highlights the importance of taking care of oral health, especially for people who already have heart problems or are at risk of heart disease.
Good oral hygiene includes brushing teeth at least twice a day, flossing regularly, and visiting a dentist for check-ups. These simple habits can help reduce harmful bacteria in the mouth and lower the risk of gum disease.
In the future, doctors may also look at new treatments that target these harmful bacteria or their proteins. By doing this, it may be possible to improve heart recovery after a heart attack.
Overall, this research shows that the health of the mouth and the health of the heart are closely connected. Taking care of your teeth and gums is not only important for your smile, but it may also help protect your heart and improve recovery after serious heart problems.
For more information about health, please see recent studies that Vitamin D deficiency can increase heart disease risk, and results showing Zinc and vitamin B6 linked to lower death risk in heart disease.
For more information about heart health, please see recent studies about more coffee linked to heart rhythm disease, and results showing Zinc and vitamin B6 linked to lower death risk in heart disease.
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