A new scientific discovery is changing how doctors think about a well-known medicine used for diabetes and weight loss.
The drug, called semaglutide, has been widely used because it helps people control blood sugar and reduce body weight. It works by copying a hormone in the body that affects appetite and digestion.
For years, doctors believed that any benefits to the liver from this drug were mainly due to weight loss. Losing weight is known to improve liver health, especially in people with fatty liver disease. But many patients taking semaglutide showed liver improvement even when they did not lose much weight. This raised an important question about how the drug really works.
Researchers at Sinai Health in Toronto have now provided a clear answer. Their study, published in Cell Metabolism, shows that semaglutide directly affects the liver in a way that does not depend on weight loss.
The liver plays a key role in keeping the body healthy. It processes food, removes harmful substances, and helps control energy. When too much fat builds up in the liver, it can lead to disease. One serious condition is MASH, where fat buildup causes inflammation and scarring. This condition can progress to severe damage and even liver failure.
Because fatty liver disease is closely linked to obesity and diabetes, treatment has focused heavily on weight loss. However, weight loss can be difficult, and not all patients respond in the same way.
In this new study, scientists used detailed lab experiments to explore how semaglutide works inside the liver. They discovered that the drug targets specific cells in the liver that were previously overlooked. These cells are called liver sinusoidal endothelial cells.
Although these cells are few in number, they play a powerful role in controlling the liver environment. They help filter substances and send signals to other cells. The researchers found that semaglutide activates these cells and changes how they behave.
Once activated, these cells begin to produce signals that reduce inflammation. This helps calm the liver and protect it from damage. Over time, this can improve liver function and reduce scarring.
One of the most important findings was that this process works without the need for weight loss. In experiments, even when appetite-related brain pathways were removed, the liver still improved. But when the special liver receptors were removed, the drug no longer helped the liver, even if weight loss occurred.
This shows that semaglutide has a direct and independent effect on the liver.
This discovery could have real benefits for patients. It means doctors may not need to rely only on weight loss to measure success. Patients who struggle to lose weight may still benefit from the drug.
It also suggests that lower doses might be effective. This could reduce side effects such as nausea and lower treatment costs. However, more research is needed before these changes can be widely applied.
There are also limitations. The study was mainly done in animal models, so human studies are still needed. Scientists must confirm that the same processes happen in people and ensure long-term safety.
Even with these limits, the study offers a new way to think about treatment. It shows that medicines can work directly on organs in ways that are not always obvious. It also highlights the importance of studying the body as a connected system.
In conclusion, semaglutide may offer a new way to treat liver disease beyond weight loss. This could help many patients who need better options for managing their condition. As research continues, this discovery may lead to more effective and personalized treatments.
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Source: Sinai Health.
