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Antiviral therapy can prevent liver cancer in chronic hepatitis B patients

2014-06-23
(Press-News.org) Antiviral Therapy Can Prevent Liver Cancer in Chronic Hepatitis B Patients

Bethesda, MD (June 23, 2014) — One of the most severe complications of hepatitis B is the development of liver cancer, which is responsible for approximately 745,000 deaths worldwide each year. Two new studies appearing in the June issue of Gastroenterology provide strong evidence that antiviral therapy can reduce the risk of liver cancer in patients with chronic hepatitis B infection. Gastroenterology is the official journal of the American Gastroenterological Association.

In the first paper,1 researchers from National Yang-Ming University in Taiwan showed that the licensed oral antiviral agent nucleos(t)ide (NUC) resulted in a reduced long-term risk for liver cancer in a large, nationwide cohort of chronic hepatitis B patients. This retrospective study analyzed the risk of hepatocellular carcinoma, the most common form of liver cancer, in patients treated with several different agents. The NUC-treated cohort had a significantly lower seven-year incidence of liver cancer compared with controls. Overall, the effect of the treatment on reduced risk for cancer was stronger in young patients without cirrhosis and in patients without diabetes.

"Our findings suggest that NUC use reduces the risk of liver cancer in chronic hepatitis B patients, particularly in younger patients with minimal liver damage," said lead study author Chun-Ying Wu, MD, PhD. "The large cohort contributed to the strength of our study, leading to reliable results regarding who can benefit the most from this treatment."

The second study,2 also a retrospective analysis, compared outcomes of chronic hepatitis B patients treated with the antiviral agent entecavir and a less potent drug, lamivudine, at a tertiary care hospital in Seoul, Korea. Researchers found that patients in the entecavir group had a significantly lower risk of death or transplantation than patients treated with lamivudine; however this reduction in risk did not translate to a decreased risk of liver cancer. Both groups produced a similar reduction in liver cancer.

"There is a persistent risk of liver cancer in hepatitis B patients treated with even the most potent agents," said study author Young-Suk Lim, MD, PhD, from department of gastroenterology, University of Ulsan College of Medicine, Seoul, Korea. "Based on our findings, we support recommendations that surveillance for liver cancer should be continued in chronic hepatitis B patients regardless of the treatment used."

Both papers support the accumulating evidence that, to avert the risk of liver cancer, antiviral therapy needs to be initiated early during the chronic hepatitis B infection, preferably before the stage of advanced fibrosis.

INFORMATION: For more information on hepatitis, read AGA's patient brochure.

About the AGA Institute The American Gastroenterological Association is the trusted voice of the GI community. Founded in 1897, the AGA has grown to include 17,000 members from around the globe who are involved in all aspects of the science, practice and advancement of gastroenterology. The AGA Institute administers the practice, research and educational programs of the organization. http://www.gastro.org.

About Gastroenterology Gastroenterology, the official journal of the AGA Institute, is the most prominent scientific journal in the specialty and is in the top 1 percent of indexed medical journals internationally. The journal publishes clinical and basic science studies of all aspects of the digestive system, including the liver and pancreas, as well as nutrition. The journal is abstracted and indexed in Biological Abstracts, Current Awareness in Biological Sciences, Chemical Abstracts, Current Contents, Excerpta Medica, Index Medicus, Nutrition Abstracts and Science Citation Index. For more information, visit http://www.gastrojournal.org.

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1 Wu, Chun-Ying et al. Association of Nucleos(t)ide Analogue Therapy with Reduced Risk of Hepatocellular Carcinoma in Patients with Chronic Hepatitis B – A Nationwide Cohort Study. Gastroenterology 2014: 148(8):143. 2 Lim, Young-Suk et al. Mortality, Liver Transplantation, and Hepatocellular Carcinoma Among Patients with Chronic Hepatitis B Treated with Entecavir vs Lamivudine. Gastroenterology 2014: 148(8):152.


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[Press-News.org] Antiviral therapy can prevent liver cancer in chronic hepatitis B patients