HBsAg Clearance in Inactive Chronic HBsAg Carriers After Interferon Treated

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01471535
Recruitment Status : Completed
First Posted : November 15, 2011
Last Update Posted : March 10, 2015
Information provided by (Responsible Party):
Yao Xie, Beijing Ditan Hospital

Brief Summary:

Hepatitis B surface antigen loss/seroconversion, considered to be the ideal outcome of chronic hepatitis B virus (HBV) infection, occurs spontaneously at a low rate in inactive carriers.

The researchers aim to investigate the ability of peginterferon alpha-2a to achieve surface antigen loss/seroconversion therapy in inactive carriers with persistently normal alanine aminotransferase (ALT) levels, undetectable HBV DNA and low surface antigen levels, who would not generally be considered candidates for therapy.

Condition or disease Intervention/treatment Phase
Chronic Hepatitis B Drug: Pegylated interferon alfa-2a Not Applicable

Detailed Description:

Chronic HBV inactive carriers were enrolled in the out-patient department of Beijing Ditan Hospital. All of them were HBsAg positive and anti-HBs negative for more than 6 months with persistent undetectable HBV DNA and normal ALT levels measured at 3-6 monthly intervals during the preceding 2 years as well as with serum HBsAg levels ≤100 IU/mL determined on two occasions during the month prior to treatment. All patients did not have other liver diseases and contraindications for interferon therapy.

After giving informed consent, patients were treated with weekly subcutaneous injections of peginterferon alpha-2a 180 µg. The use of other immune suppressive or regulatory drugs and other antiviral drugs was prohibited during the course of the study.

In this study, the only parameter to assessing the treatment response was HBsAg level change. Treatment endpoint was HBsAg loss(<0.05 IU/mL) and anti-HBs positive(>10 mIU/mL) defined as seroconversion.

Depending on the decline of HBsAg level, treatment was either continued for a prolonged period until the endpoint was achieved, or terminated in case of nonresponse. Treatment was proceeded if HBsAg level continued to decline until HBsAg seroconversion was achieved and the anti-HBs level was above 200 mIU/ml. If the patients were not willing to extend treatment, the therapy was ended at the time of HBsAg loss, or stopped without further decline of HBsAg levels on three months treatment.

Liver function parameters, including ALT, aspartate aminotransferase (AST), albumin (ALB) and total bilirubin (Tbil) were examined using an automated biochemical analyzer. Peripheral blood neutrophil and platelet count were detected before treatment, and monitored during treatment with one to three month intervals, and base on the test results to adjust the next checking time. Quantitative HBV DNA testing was conducted using a commercially available real-time fluorescence quantitative PCR kit. HBsAg levels were quantified with Architect i2000 HBsAg quantitative assay (Abbott Laboratories) kit.

The main efficacy endpoints were HBsAg loss and seroconversion.

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 20 participants
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: HBsAg Loss/Seroconversion in Inactive Chronic Hepatitis B Carriers Treated With Peginterferon Alpha-2a
Study Start Date : May 2008
Actual Primary Completion Date : December 2012
Actual Study Completion Date : December 2012

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Experimental: peginterferon alpha 2a
the inactive chronic HBsAg carriers were treated with peginterferon alpha 2a for 72 weeks and followed for 24 weeks.
Drug: Pegylated interferon alfa-2a
patients were given peginterferon alfa-2a (40KD) (Pegasys®; Roche, Basel, Switzerland)180 µg by subcutaneous injection once weekly for 120 weeks
Other Name: Pegasys®; Roche, Basel, Switzerland

Primary Outcome Measures :
  1. HBsAg loss/seroconversion [ Time Frame: HBsAg level was lower than 0.05IU/mL after 96 weeks treatment ]
    HBsAg loss was defined as HBsAg levels <0.05 IU/mL. Anti-HBs was measured using Architect i2000 kit,and anti-HBs >10 mIU/L was considered positive.

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Ages Eligible for Study:   18 Years to 60 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • HBsAg positive and anti-HBs negative for more than 6 months
  • HBeAg-negative/anti-HBe-positive
  • Persistently undetectable HBV DNA with normal ALT levels, as established at 3-6 monthly intervals during the preceding 2 yrs
  • Serum HBsAg levels ≤100 IU/mL, as determined on two occasions during the month prior to treatment
  • Absence of previous antiviral therapy

Exclusion Criteria:

  • With active alcohol and/or drugs consumption
  • With human immunodeficiency virus or hepatitis C virus coinfections
  • With clinical evidence of cirrhosis
  • With history of autoimmune hepatitis
  • With hematological or psychiatric diseases
  • With evidence of neoplastic diseases
  • With severe cardiac or pulmonary disease

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01471535

China, Beijing
liver disease center, Beijing Ditan Hospital
Beijing, Beijing, China, 100015
Sponsors and Collaborators
Beijing Ditan Hospital
Principal Investigator: Yao Xie, phD/MD Liver diseases center, Beijing Ditan Hospital

Responsible Party: Yao Xie, Director of division 4, liver diseases center, Beijing Ditan Hospital Identifier: NCT01471535     History of Changes
Other Study ID Numbers: DTH-XY002
First Posted: November 15, 2011    Key Record Dates
Last Update Posted: March 10, 2015
Last Verified: March 2015

Keywords provided by Yao Xie, Beijing Ditan Hospital:
chronic hepatitis B

Additional relevant MeSH terms:
Hepatitis A
Hepatitis, Chronic
Hepatitis B
Hepatitis B, Chronic
Liver Diseases
Digestive System Diseases
Hepatitis, Viral, Human
Virus Diseases
Enterovirus Infections
Picornaviridae Infections
RNA Virus Infections
Hepadnaviridae Infections
DNA Virus Infections
Peginterferon alfa-2a
Antineoplastic Agents
Antiviral Agents
Anti-Infective Agents
Immunologic Factors
Physiological Effects of Drugs