Change in serum hepatitis B surface antigen level and its clinical significance in treatment-naïve, hepatitis B e antigen-positive patients receiving entecavir

Young Kul Jung, Ji Hoon Kim, Young Sun Lee, Hyun Jung Lee, Eileen Yoon, Eun Suk Jung, Seung Kwon Hong, Moon Kyung Joo, Jong Eun Yeon, Jong Jae Park, Jae Seon Kim, Young Tae Bak, Kwan Soo Byun

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34 Citations (Scopus)

Abstract

Background/Aim: We investigated changes in hepatitis B surface antigen (HBsAg) level and its correlation with clinical outcomes in treatment-naive chronic hepatitis B (CHB) patients undergoing entecavir therapy. PATIENTS AND METHODS: Among 51 hepatitis B e antigen (HBeAg)-positive treatment-naive CHB patients receiving entecavir for more than 1 year, 28 were enrolled. HBsAg levels were measured at baseline, 6 months, and 12 months after treatment using the Architect HBsAg QT assay (Abbott, dynamic; range: 0.05 to 125,000 IU/mL). Serum alanine aminotransferase, HBeAg, anti-HBe, and hepatitis B virus (HBV) DNA (Cobas Taqman: low detection limit 1.84 log10 copies/mL) were measured at baseline and every 3 months. The HBsAg response was defined as an HBsAg level that decreased more than 1 log10 IU/mL from baseline level at 12 months after entecavir treatment. Results: Twenty-eight patients were treated for a median period of 21 months (range: 18 to 24 mo). Serum HBsAg level showed a mean of 4.0, 3.7, and 3.6 log10 IU/mL at pretreatment, 6, and 12 months, respectively, and declined significantly (P<0.001). Serum HBV DNA level showed a mean of 8.1, 3.1, and 2.4 log10 copies/mL at pretreatment, 6, and 12 months, respectively, and declined significantly (P<0.001). The decline in HBsAg level was significantly correlated with that of the HBV DNA level at 12 months from baseline (γ=0.391, P=0.044). Five patients showed an HBsAg response, and cumulative incidence of HBeAg loss at 1 year after entecavir treatment was 80% versus 30% in patients with an HBsAg response and those without, respectively (P=0.034). Conclusions: Monitoring changes in quantitative HBsAg level could be a useful parameter for assessing the response to entecavir therapy in HBeAg-positive treatment-naive CHB patients.

Original languageEnglish
Pages (from-to)653-657
Number of pages5
JournalJournal of Clinical Gastroenterology
Volume44
Issue number9
DOIs
Publication statusPublished - 2010 Oct 1

Keywords

  • chronic hepatitis B
  • entecavir
  • hepatitis B e antigen positive
  • hepatitis B surface antigen
  • treatment-naive

ASJC Scopus subject areas

  • Gastroenterology

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