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Current treatment for chronic hepatitis B in Japan

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Abstract

To standardize diagnosis, treatment, and management of chronic hepatitis B, updated treatment guidelines in Japan have been formulated by a research team of the Japanese Ministry of Health, Labor and Welfare (MHLW)’s study project “Research on standardization of treatment for viral liver diseases including liver cirrhosis.” The guidelines recommend first that chronic hepatitis B patients characterized by ALT levels of at least 31 IU/l, with HBe antigen (HBeAg)-positive patients having HBV DNA levels of at least 5 log copies/ml and HBeAg-negative patients with HBV DNA levels of at least 4 log copies/ml, be targeted for treatment. Patients indicated for treatment intervention, for whom are suggested such basic treatments as entecavir therapy, long-term interferon (IFN) therapy, and sequential therapy, are divided into age groups comprising young patients (less than 35 years of age) and middle-aged/elderly patients (35 years and older), HBeAg-positive and HBe-negative patients, and patients with HBV DNA levels of at least 7 log copies/ml and those of less than 7 log copies/ml. As for switching to entecavir for chronic hepatitis B patients currently undergoing lamivudine therapy, the guidelines suggest specific therapies for different groups, dividing patients into those undergoing lamivudine therapy for less than 3 years and those treated for 3 years or longer, as well as those having HBV DNA levels of less than 1.8 log copies/ml and those of 1.8 log copies/ml or more. Formulated on the basis of consideration of chronic hepatitis B patient age, ALT level, HBeAg status, HBV DNA level, and liver disease severity, these guidelines are considered useful for the understanding and implementation of chronic hepatitis B infection diagnosis and treatment, which in recent years have advanced markedly and grown ever more diverse.

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Correspondence to Kazuaki Chayama.

Appendix: Supplement to guidelines

Appendix: Supplement to guidelines

  • Efficacy of hepatitis B treatment varies depending on HBV genotype, making it desirable to consider such genotype information when treatment methods are determined. In particular, because IFN therapy for genotypes A and B even in those aged 35 years and older is highly effective, IFN therapy is desirable as the first treatment option.

  • The IFN treatment period is generally 24 weeks, but for responders (decrease in HBV DNA levels and/or normalization of ALT levels), 48-week treatment is recommended.

  • In the many patients when mother-to-child hepatitis B infection is IFN resistant, sequential entecavir and IFN therapy is considered one option.

  • Patients with liver cirrhosis and/or HCC post-curative also can be treated with nucleoside analogues.

  • For patients aged 35 years or older with normal ALT levels, and in whom viral replication is persistent, antiviral therapy is applicable. However, for patients in whom administration of antiviral therapy proves difficult, such as in the elderly or in HBeAg-negative patients, liver supporting therapy over time is an option.

  • Even for patients in whom HBV DNA levels are low and ALT levels are normal, immunosuppressive drugs and anti-cancer drug administration can lead to increased HBV DNA levels and severe hepatic damage [37], requiring great caution.

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Ohishi, W., Chayama, K. Current treatment for chronic hepatitis B in Japan. Clin J Gastroenterol 2, 325–330 (2009). https://doi.org/10.1007/s12328-009-0100-1

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