Liver cancer is one of the deadliest forms of cancer in the world. It causes hundreds of thousands of deaths every year and is especially common in people with long-term liver disease.
Although doctors have made progress in detecting and treating liver cancer, many patients are still diagnosed at advanced stages when treatment becomes more difficult.
Now, scientists from Hiroshima University and several Japanese medical institutions have uncovered important new clues about what may cause liver cancer to grow. Their findings suggest that inflammation and aging-related changes inside the liver may play a major role in triggering cancer development.
The research was published in the Journal of Proteome Research. The team studied hepatocellular carcinoma, often called HCC, which is the most common type of liver cancer. HCC is responsible for most liver cancer cases around the world.
In recent years, researchers have noticed that many liver cancer patients also suffer from chronic liver disease, even when the disease is not caused by viruses such as hepatitis B or hepatitis C. Chronic liver disease can develop from conditions including obesity, fatty liver disease, diabetes, alcohol use, and long-term liver inflammation.
Scientists have been trying to understand exactly how chronic liver disease changes healthy liver tissue and eventually leads to cancer. To investigate this question, the Japanese research team compared healthy liver tissue with tissue from patients who had chronic liver disease linked to liver cancer.
The researchers used advanced methods to examine gene activity and chemical changes inside liver cells. They studied RNA, which carries genetic instructions inside cells, to see which genes were more active or less active in diseased liver tissue.
At the same time, they examined metabolites, which are small molecules produced during the body’s normal chemical processes.
By combining these approaches, the scientists were able to identify several important changes happening inside the liver before cancer fully develops.
One of the biggest discoveries involved inflammation. The researchers found that many liver tissues showed strong activation of inflammation-related pathways. Inflammation is the body’s natural response to injury or infection, but when inflammation continues for many years, it can damage healthy tissue.
The study suggests that this long-term inflammation may create conditions that help liver cancer grow. Constant inflammation may stress liver cells, damage DNA, and interfere with normal repair systems inside the body.
The scientists also discovered important changes linked to aging and metabolism. In some patients, liver tissue showed problems with fatty acid metabolism, which is the process the body uses to break down and use fats for energy. These tissues also showed abnormal buildup of fats and shortages of important metabolites.
The researchers divided chronic liver disease into two major subtypes. One subtype was strongly connected to inflammation, while the second subtype was more closely linked to aging-related metabolic problems.
These findings suggest that liver cancer may not develop in exactly the same way in every patient. Instead, different biological processes may drive cancer growth in different people. Understanding these differences could help doctors design more personalized prevention and treatment strategies in the future.
The research team believes these discoveries are important because they may reveal new targets for preventing liver cancer before it starts. Instead of only treating cancer after tumors appear, doctors may eventually be able to stop the harmful liver changes that lead to cancer development.
The study also explored whether certain compounds could help reverse some of the harmful changes inside the liver. The researchers pointed to earlier studies showing that epigallocatechin gallate, often called EGCG, may help reduce inflammation-related pathways. EGCG is a natural antioxidant found in green tea.
Previous animal studies have suggested that green tea compounds may help improve some liver abnormalities linked to chronic liver disease. However, the researchers stressed that much more work is needed before any treatment recommendations can be made for patients.
The scientists hope future therapies may target the specific biological problems found in different groups of patients. For example, treatments that reduce inflammation may help people whose liver disease is driven mainly by inflammatory processes, while other therapies may help correct metabolic problems linked to aging.
Liver cancer remains a growing global health problem. Experts estimate that cases may continue rising in the coming decades due to increasing rates of obesity, fatty liver disease, and diabetes worldwide. Because liver cancer is often difficult to detect early, prevention and early intervention are considered extremely important.
The findings also highlight how complex cancer development can be. Liver cancer is not caused by just one single factor. Instead, it may develop slowly over many years as inflammation, metabolic changes, aging, and cellular damage interact with each other.
Although the study does not provide an immediate cure, it offers scientists a better understanding of the hidden biological processes that may fuel liver cancer growth. Researchers believe this knowledge could eventually lead to more precise treatments and better ways to prevent cancer before it develops.
If you care about liver health, please read studies about simple habit that could give you a healthy liver, and common diabetes drug that may reverse liver inflammation.
For more information about health, please see recent studies about simple blood test that could detect your risk of fatty liver disease, and results showing this green diet may strongly lower non-alcoholic fatty liver disease.
The study was published in the Journal of Proteome Research.
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