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Objective : The proportion of hepatitis e antigen (HBeAg)-negative chronic hepatitis B (CHB) patients in China has increased rapidly. However, the response of these patients to peginterferon (peg-IFN) treatment is poor, and the antiviral treatment strategies are inconsistent. This study aimed to investigate the role of hepatitis B virus (HBV) DNA and hepatitis B surface antigen (HBsAg) in early prediction of response in HBeAg-negative CHB patients receiving peg-IFN α-2a. Patients and Methods : Treatment-naïve HBeAg-negative patients were involved in this prospective study during 2014-2018. The HBV DNA and HBsAg were quantified at baseline and during treatment (weeks 12, 24 and 48) in sera. The factors associated with HBV DNA undetectable and HBsAg &lt;100 IU/ml at treatment 48 weeks were assessed. Results : This study involved 45 patients. There was HBV DNA undetectable in 36 cases (80%), including 19 (52.8%) with HBsAg &lt;100 IU/ml at week 48. The HBV DNA &lt;2.0 log 10 IU/ml at week 24 (PPV = 96.9%, NPV = 66.7%, P = 0.018) was an independent predictor of HBV DNA undetectable at week 48. The HBsAg &lt;800 IU/ml at baseline (PPV = 92.1%, NPV = 69.7%, P = 0.054) and HBsAg decline &gt;5.00-fold at week 24 (PPV = 83.3%, NPV = 77.8%, P = 0.038) were independent predictors of HBsAg &lt;100 IU/ml and HBV DNA undetectable at week 48. Conclusion : Early on-treatment quantification of HBV DNA and HBsAg in patients with HBeAg-negative CHB treated with peg-IFN α-2a may help identify those likely to be cured by this method and optimize therapy strategies.

HBV DNA and HBsAg: Early Prediction of Response to Peginterferon α-2a in HBeAg-Negative Chronic Hepatitis B