New insights into how fatty liver disease progresses to cancer

Orlando, Fla. (April 7, 2019) – The buildup of fat in the liver known as fatty liver disease sometimes leads to hard-to-treat liver cancer. Scientists don’t understand why the cancer risk is higher for fatty liver disease caused by excessive alcohol consumption than for non-alcoholic fatty liver disease, which is associated with obesity and type 2 diabetes.

New research has uncovered important differences in the biological pathways that lead to cancer for alcoholic fatty liver disease compared to non-alcoholic fatty liver disease. The findings could benefit the more than 3 million people diagnosed with fatty liver disease each year.

“We want to find out the key factors and pathways that lead to liver cancer in fatty liver patients so we can slow or even prevent the liver cancer,” said Yue Jia, MD, PhD, a pathology resident at the Harbor-UCLA Medical Center who conducted the study. “It is estimated that this type of liver cancer is responsible for 250,000 to 1 million deaths each year.”

Jia will present the research at the American Society for Investigative Pathology annual meeting during the 2019 Experimental Biology meeting to be held April 6-9 in Orlando, Fla.

In the new study, the researchers examined expression levels of proteins in liver biopsies from a group of patients with alcoholic fatty liver disease and a group with non-alcoholic fatty liver disease. The proteins studied are involved in epigenetic regulation, which controls gene expression, and inflammation, which plays an important role in the disease.

The researchers observed that the two groups of patients showed significant differences in the expression of proteins involved in epigenetic regulators and inflammation. Importantly, these differences matched the ratio of liver cancer development seen for the two groups.

“If, through additional studies, we can prove that the molecules and pathways we identified modulate liver cancer development in the alcoholic fatty liver disease or non-alcoholic fatty liver disease patients, it may help identify new targets for preventing or reducing the risk of liver cancer that arises from other liver disease,” said Jia.

The researchers plan to perform additional experiments in animal models of fatty liver disease to learn more about how epigenetic regulation and inflammation pathways lead to liver cancer.

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Experimental Biology is an annual meeting that attracts more than 14,000 scientists and exhibitors from five host societies and more than two dozen guest societies. With a mission to share the newest scientific concepts and research findings shaping clinical advances, the meeting offers an unparalleled opportunity for exchange among scientists from across the U.S. and the world who represent dozens of scientific areas, from laboratory to translational to clinical research. http://www.experimentalbiology.org #expbio

ASIP is a society of biomedical scientists who investigate mechanisms of disease. Investigative pathology is an integrative discipline that links the presentation of disease in the whole organism to its fundamental cellular and molecular mechanisms. ASIP advocates for the practice of investigative pathology and fosters the professional career development and education of its members. http://www.asip.org

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