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Early Serum HBsAg Kinetics as Predictor of HBsAg Loss in Patients with HBeAg-Negative Chronic Hepatitis B after Treatment with Pegylated Interferonα-2a

  • RESEARCH ARTICLE
  • Published:
Virologica Sinica

Abstract

Hepatitis B surface antigen (HBsAg) loss is an ideal treatment endpoint for patients with chronic hepatitis B (CHB). We investigated the predictive value of on-treatment HBsAg levels for HBsAg loss in hepatitis B e antigen (HBeAg)-negative CHB patients who received 120-week PEG-IFNα-2a treatment. Serum HBV DNA, HBsAg, and anti-HBs levels were assayed at baseline and every 3 months during the treatment. Of 81 patients, 12 achieved HBsAg loss, 20 achieved HBsAg < 100 IU/mL, and 49 maintained HBsAg ≥ 100 IU/mL. HBsAg loss rate was only 3.7% at 48 weeks, while it reached to 11.1% and 14.8% after treatment of 96 weeks and 120 weeks. The cutoff HBsAg levels at 12 weeks predicting HBsAg loss at 96 weeks and 120 weeks of treatment were 400 IU/mL and 750 IU/mL, with AUC 0.725 and 0.722, positive predictive value (PPV) 29.41% and 30.56%, and negative predictive value (NPV) 93.75% and 97.78%, respectively. The cutoff HBsAg levels at 24 weeks predicting HBsAg loss at 96 weeks and 120 weeks of treatment were 174 IU/mL and 236 IU/mL respectively, with AUC 0.925 and 0.922, PPV 40.0% and 46.15%, and both NPV 100%. The predictive ability of the cutoff HBsAg levels at 24 weeks was better than that at 12 weeks for HBsAg loss at either 96 or 120 weeks (χ2 = 3.880, P = 0.049 and χ2 = 4.412, P = 0.036). These results indicate that extended therapy is critical to HBsAg loss in HBeAg-negative CHB patients during PEG-IFN treatment, and the HBsAg level at 24 weeks can be used to predict HBsAg loss during tailoring PEG-IFN therapy.

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Acknowledgements

This study was funded in part by the Bei**g Hospitals Authority of Hospitals Clinical Medicine Development of Special Funding Support (XMLX 201706), the National Science and Technology Major Project of China (2017ZX10203202-003, 2017ZX10201201-001-006, and 2017ZX10201201-002-006), Bei**g Science and Technology Commission (D161100002716002), and the Digestive Medical Coordinated Development Center of Bei**g Hospitals Authority (XXZ0302 and XXT28).

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YX designed the study. ML, LZ, YL, QC, HL, FS and ZZ performed the data collection and patient followup. YX and GW conducted data analysis. ML and LZ drafted the manuscript. LZ and YX revised and finalized the manuscript. All authors read and approved the final version of the manuscript.

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Correspondence to Linqing Zhao or Yao **e.

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The authors declare that they have no conflict of interest.

Animal and Human Rights Statement

The study was approved by the Institutional Review Board of Bei**g Ditan Hospital (Approval number: JDL2013-031-07). Written informed consent was obtained from all patients, and the study was registered at clinicaltrials.gov (Clinical Trials. gov ID: NCT02387684).

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Li, M., Zhang, L., Lu, Y. et al. Early Serum HBsAg Kinetics as Predictor of HBsAg Loss in Patients with HBeAg-Negative Chronic Hepatitis B after Treatment with Pegylated Interferonα-2a. Virol. Sin. 36, 311–320 (2021). https://doi.org/10.1007/s12250-020-00290-7

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