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Abstract
Hepatitis B virus (HBV) infection is a major public health problem, with an estimated 296 million people chronically infected and 820 000 deaths worldwide in 2019. Diagnosis of HBV infection requires serological testing for HBsAg and for acute infection additional testing for IgM hepatitis B core antibody (IgM anti-HBc, for the window period when neither HBsAg nor anti-HBs is detected). Assessment of HBV replication status to guide treatment decisions involves testing for HBV DNA, whereas assessment of liver disease activity and staging is mainly based on aminotransferases, platelet count, and elastography. Universal infant immunisation, including birth dose vaccination is the most effective means to prevent chronic HBV infection. Two vaccines with improved immunogenicity have recently been approved for adults in the USA and EU, with availability expected to expand. Current therapies, pegylated interferon, and nucleos(t)ide analogues can prevent development of cirrhosis and hepatocellular carcinoma, but do not eradicate the virus and rarely clear HBsAg. Treatment is recommended for patients with cirrhosis or with high HBV DNA levels and active or advanced liver disease. New antiviral and immunomodulatory therapies aiming to achieve functional cure (ie, clearance of HBsAg) are in clinical development. Improved vaccination coverage, increased screening, diagnosis and linkage to care, development of curative therapies, and removal of stigma are important in achieving WHO's goal of eliminating HBV infection by 2030.
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Affiliation(s)
- Wen-Juei Jeng
- Department of Gastroenterology and Hepatology, Linkou Medical Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - George V Papatheodoridis
- Academic Department of Gastroenterology, Medical School of National and Kapodistrian University of Athens, Laiko General Hospital, Athens, Greece
| | - Anna S F Lok
- Division of Gastroenterology and Hepatology, University of Michigan, Ann Arbor, MI, USA.
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Choi HSJ, Sonneveld MJ, Farag MS, Brouwer WP, Brakenhoff SM, Hirode G, Gehring AJ, de Man RA, Hansen BE, Janssen HLA. Effects of on-treatment ALT flares on serum HBsAg and HBV RNA in patients with chronic HBV infection. J Viral Hepat 2021; 28:1729-1737. [PMID: 34514678 DOI: 10.1111/jvh.13613] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 08/26/2021] [Accepted: 08/27/2021] [Indexed: 12/15/2022]
Abstract
As pegylated interferon alpha (PEG-IFN-α) is increasingly used in combination regimens of novel drugs, we aimed to characterize ALT flares and their relationship with serum HBsAg and HBV RNA kinetics in a large combined cohort of chronic hepatitis B (CHB) patients on PEG-IFN-α-based therapy. In this post hoc analysis of four international randomized trials, 269/130/124/128 patients on PEG-IFN-α monotherapy, PEG-IFN-α plus nucleos(t)ide analogue (NA) de novo combination, PEG-IFN-α add-on to NA or NA monotherapy were included, respectively. A flare was defined as an episode of ALT ≥5 × ULN. The association between flares and HBsAg and HBV RNA changes were examined. On-treatment flares occurred in 83/651 (13%) patients (median timing/magnitude: week 8 [IQR 4-12], 7.6 × ULN [IQR 6.2-10.5]). Flare patients were more often Caucasians with genotype A/D and had higher baseline ALT, HBV DNA, HBV RNA and HBsAg levels than the no-flare group. More flares were observed on PEG-IFN-α monotherapy (18%) and PEG-IFN+NA de novo combination (24%) vs. PEG-IFN-α add-on (2%) or NA monotherapy (1%) (p < .001). On-treatment flares were significantly and independently associated with HBsAg and HBV RNA decline ≥1 log10 at the final visit declines started shortly before the flare, progressing towards 24 weeks thereafter. On-treatment flares were seen in 16/22 (73%) patients who achieved HBsAg loss. In conclusion, ALT flares during PEG-IFN-α treatment are associated with subsequent HBsAg and HBV RNA decline and predict subsequent HBsAg loss. Flares rarely occurred during PEG-IFN-α add-on therapy and associated with low HBsAg loss rates. Combination regimens targeting the window of heightened response could be promising.
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Affiliation(s)
- Hannah S J Choi
- Toronto Centre for Liver Disease, University Health Network, Toronto, ON, Canada.,Institute of Medical Science, University of Toronto, Toronto, ON, Canada
| | - Milan J Sonneveld
- Gastroenterology and Hepatology, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Mina S Farag
- Toronto Centre for Liver Disease, University Health Network, Toronto, ON, Canada
| | - Willem P Brouwer
- Gastroenterology and Hepatology, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Sylvia M Brakenhoff
- Gastroenterology and Hepatology, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Grishma Hirode
- Toronto Centre for Liver Disease, University Health Network, Toronto, ON, Canada
| | - Adam J Gehring
- Toronto Centre for Liver Disease, University Health Network, Toronto, ON, Canada
| | - Rob A de Man
- Gastroenterology and Hepatology, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Bettina E Hansen
- Toronto Centre for Liver Disease, University Health Network, Toronto, ON, Canada.,Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, ON, Canada
| | - Harry L A Janssen
- Toronto Centre for Liver Disease, University Health Network, Toronto, ON, Canada
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Jeng W. The unsolved issues in oral antiviral therapy in HBeAg positive chronic hepatitis B patients. ADVANCES IN DIGESTIVE MEDICINE 2021. [DOI: 10.1002/aid2.13276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Wen‐Juei Jeng
- College of Medicine Chang Gung University Taipei Taiwan
- Department of Gastroenterology and Hepatology Chang Gung Memorial Hospital, Linkou branch Taoyuan Taiwan
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