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Real-Time Polymerase Chain Reaction-Based Detection and Quantification of Hepatitis B Virus DNA
Published on: December 15, 2023
Hepatitis B surface antigen serum level is associated with fibrosis severity in treatment-naïve, e antigen-positive
Michelle Martinot-Peignoux1, Roberto Carvalho-Filho, Martine Lapalus
1Centre de Recherche Biomédicale Bichat-Beaujon (CRB3), INSERM U-773 and Service d'Hépatologie Hôpital Beaujon APHP, Université Paris-Diderot, 92110 Clichy, France. michelle.martinot@inserm.fr
Insights
Low serum HBsAg levels are linked to severe liver fibrosis in chronic hepatitis B (CHB) patients. A specific HBsAg cutoff may predict fibrosis in certain HBV genotypes.
Area of Science:
- Hepatology
- Virology
- Biochemistry
Background:
- Chronic hepatitis B (CHB) is a significant global health concern.
- Understanding the relationship between viral markers and liver disease severity is crucial for patient management.
- Limited data exists on serum HBsAg and HBV DNA levels in relation to liver disease severity in treatment-naïve CHB patients.
Purpose of the Study:
- To investigate the association between serum HBsAg and HBV DNA levels and liver disease severity in a large cohort of treatment-naïve CHB patients.
- To explore the predictive value of serum HBsAg levels for fibrosis severity.
Main Methods:
- Cross-sectional study of 406 treatment-naïve CHB patients.
- Simultaneous collection of serum samples and liver biopsies.
- Quantification of serum HBsAg, HBV DNA, and HBV genotype; histological scoring using the METAVIR system.
Main Results:
- Strong correlation between serum HBsAg and HBV DNA levels in HBeAg(+) patients (r=0.44).
- Significant association between serum HBsAg levels and fibrosis severity (r=0.43).
- HBeAg(+) patients with moderate to severe fibrosis showed lower serum HBsAg and HBV DNA levels.
- A serum HBsAg cut-off of 3.85 logIU/ml demonstrated high predictive value for fibrosis in HBV genotypes B or C.
Conclusions:
- Low serum HBsAg levels are associated with moderate to severe liver fibrosis in HBeAg(+) CHB patients.
- A serum HBsAg cut-off can predict fibrosis severity in CHB patients with HBV genotypes B or C.
- These findings offer insights into non-invasive fibrosis assessment in CHB management.
Background & Aims:
Little is currently known about the association between serum HBsAg or HBV DNA levels and the severity of liver disease in chronic hepatitis B (CHB) patients. Therefore, we investigated these relationships in a large cohort of unselected, well-characterized, treatment-naïve CHB patients.
Methods:
CHB patients were assessed at the Hôpital Beaujon in Paris, France, between 2000 and 2008. Serum samples and liver biopsies were obtained on the same day. HBsAg, HBV DNA, and HBV genotype were investigated using commercial diagnostic assays and liver histology was scored using the METAVIR system.
Results:
406 patients were included in this cross-sectional study. Serum HBsAg and HBV DNA levels in hepatitis B e antigen-positive (HBeAg[+]) patients showed strong correlation (r=0.44, p<0.0001), as did serum HBsAg levels and fibrosis severity (r=0.43, p<0.0001). HBeAg(+) patients with moderate to severe fibrosis exhibited significantly lower serum HBsAg and HBV DNA levels compared with patients with no or mild fibrosis. Modeling analysis suggested a serum HBsAg cut-off of 3.85 logIU/ml would provide a theoretical sensitivity of 100% (95% CI: 0-100), theoretical specificity of 86% (95% CI: 50-100), and a negative predictive value of 100% (95% CI: 67-100) in HBeAg(+) patients infected with HBV genotype B or C.
Conclusions:
We found an association between low serum HBsAg levels and moderate to severe fibrosis in HBeAg(+) CHB patients. Furthermore, we described a serum HBsAg cut-off for the prediction of fibrosis severity in CHB patients infected with HBV genotype B or C.
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