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J Viral Hepat. 2017 Jun 5. doi: 10.1111/jvh.12736. [Epub ahead of print]
Hepatitis B Surface Antigen Loss and Sustained Viral Suppression in Asian Chronic Hepatitis B Patients: A Community-Based Real World Study.Wong RJ1, Nguyen MT2, Trinh HN3, Chan C1, Huynh A2, Ly MT2, Nguyen HA3, Nguyen KK3, Torres S1, Yang J3, Liu B1, Garcia RT3, Bhuket T1, Baden R1, Levitt B3, da Silveira E3, Gish RG4,5.
Author information
1Division of Gastroenterology and Hepatology, Alameda Health System - Highland Hospital, Oakland, California, USA.2Silicon Valley Research Institute, San Jose, California, USA.3San Jose Gastroenterology, San Jose, California, USA.4Division of Gastroenterology and Hepatology, Department of Medicine, Stanford University Medical Center, Stanford, California, USA.5Hepatitis B Foundation, Doylestown, Pennsylvania, USA.
AbstractCommunity-based real-world outcomes on effectiveness of antiviral therapies for chronic hepatitis B virus (CHB) in Asians are limited. Whether hepatitis B surface antigen (HBsAg) loss correlates with undetectable virus and alanine aminotransferase (ALT) normalization on treatment or what predicts risk of seroreversion or detectable virus after stopping therapy is unclear. We aim to evaluate rates and predictors of HBsAg loss, seroconversion, ALT normalization and undetectable HBV DNA, including HBsAg seroreversion or re-emergence of HBV DNA among Asian CHB patients. We retrospectively evaluated 1,072 CHB adults on antiviral therapy at two community gastroenterology clinics from 1997-2015. Rates of HBsAg loss, ALT normalization, achieving undetectable HBV DNA, and developing surface antibody (anti-HBs) were stratified by HBeAg status. Following HBsAg loss, HBsAg seroreversion or re-emergence of detectable HBV DNA were analyzed. With median treatment of 76.7 months, the overall rate of HBsAg loss was 4.58%, with similar HBsAg loss rates between HBeAg-positive and HBeAg-negative patients (4.44% vs. 4.71%, p=0.85) in a predominantly Asian population (98.1%). Among HBsAg loss patients, 33.3% developed anti-HBs, 95.8% achieved undetectable virus, and 66.0% normalized ALT. No significant baseline or on-treatment predictors of HBsAg loss were observed. While 6 patients who achieved HBsAg loss had seroreversion with re-emergence of HBsAg positivity, viral load remained undetectable, demonstrating the sustainability of viral suppression. Among a large community-based real-world cohort of Asian CHB patients treated with antiviral therapy, rate of HBsAg loss was 4.58%. Despite only 33.3% of HBsAg loss patients achieving anti-HBs, nearly all patients achieved sustained undetectable virus. This article is protected by copyright. All rights reserved.
This article is protected by copyright. All rights reserved.
KEYWORDS: HBV; Asians; oral antivirals; surface antigen; viral suppression
PMID:28581644DOI:10.1111/jvh.12736
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