AASLD guidelines for treatment of chronic hepatitis B

Abstract

Potential conflict of interest: Dr. Jonas consults and received grants from Gilead. She received grants from Bristol‐Myers Squibb and Roche. Dr. Chang advises Genentech, Alnylam, and Arbutus. Dr. Terrault consults for Bristol‐Myers Squibb and received grants from Gilead. Dr. Bzowej received grants from Gilead, Synageva, and Ocera. The funding for the development of this Practice Guideline was provided by the American Association for the Study of Liver Diseases. This Practice Guideline was approved by the AASLD on August 1, 2015. This Practice Guideline published with accompanying Reviews by Lok et al., Jonas et al., and Brown et al. See Editorial on Page 31 Objectives and Guiding Principles Guiding Principles This document presents official recommendations of the American Association for the Study of Liver Diseases (AASLD) on the treatment of chronic hepatitis B (CHB) virus (HBV) infection in adults and children. Unlike previous AASLD practice guidelines, this guideline was developed in compliance with the Institute of Medicine standards for trustworthy practice guidelines and uses the Grading of Recommendation Assessment, Development and Evaluation (GRADE) approach.1 Multiple systematic reviews of the literature were conducted to support the recommendations in this practice guideline. An enhanced understanding of this guideline will be obtained by reading the applicable portions of the systematic reviews. This guideline focuses on using antiviral therapy in chronic HBV infection and does not address other related and important issues, such as screening, prevention, and surveillance. For broader issues related to diagnosis, surveillance, and prevention as well as treatment in special populations (e.g., liver transplant recipients) that are not addressed by this guideline, the previous AASLD guideline2 and recent World Health Organization (WHO) guideline3 are excellent additional resources. Objectives Guideline developers from the AASLD formulated a list of discrete questions that physicians are faced with in daily practice. These questions were: Should adults with immune active CHB be treated with antiviral therapy to decrease liver‐related complications? Should adults with immune‐tolerant infection be treated with antiviral therapy to decrease liver‐related complications? Should antiviral therapy be discontinued in hepatitis B e antigen (HBeAg)‐positive persons who have developed HBeAg seroconversion on therapy? Should antiviral therapy be discontinued in persons with HBeAg‐negative infection with sustained HBV DNA suppression on therapy? In HBV‐monoinfected persons, does entecavir therapy, when compared to tenofovir therapy, have a different impact on renal and bone health? Is there a benefit to adding a second antiviral agent in persons with persistent low levels of viremia while being treated with either tenofovir or entecavir? Should persons with compensated cirrhosis and low levels of viremia be treated with antiviral agents? Should pregnant women who are hepatitis B surface antigen (HBsAg) positive with high viral load receive antiviral treatment in the third trimester to prevent perinatal transmission of HBV? Should children with HBeAg‐positive CHB be treated with antiviral therapy to decrease liver‐related complications? Target Audience This guideline is intended primarily for health care professionals caring for patients with CHB. Additionally, this guideline may assist policy makers in optimizing the care of individuals living with CHB. Background Burden of Disease Globally, an estimated 240 million persons have CHB with a varying prevalence geographically, highest in Africa and Asia.4 In the United States, the National Health and Nutrition Examination Survey (1999 to 2008) identified approximately 704,000 adults with CHB,5 but with adjustments for hepatitis B infection among foreign‐born persons, the upper estimate of CHB in the United States may be as high as 2.2 million.6 Globally, deaths from cirrhosis and hepatocellular carcinoma (HCC) were estimated at 310,000 and 340,000 per year, respectively.7 To reduce the morbidity and mortality of CHB in the United States and worldwide, there is a need for continued efforts to identify infected individuals through targeted screening, prevent new infections through vaccination, and monitor and treat those at risk for complications of their CHB, including surveillance for HCC.8 Natural History in Adults and Children CHB has been traditionally characterized into four phases (Table 1), reflecting the dynamic relationship between viral replication and evolution and the host immune response. These phases are of variable duration and not every person infected with CHB will evolve through all phases. Given the dynamic nature of CHB infection, serial monitoring of HBV DNA and alanine aminotransferase (ALT) levels is important to characterize the phase of infection. A single ALT and HBV DNA level are insufficient to assign phase of infection and/or need for tre