Hepatitis B Virus Mutants and the Therapeutic Effect of Peginterferon Alfa-2a in HBeAg-Positive Chronic Hepatitis B

July 29, 2013 updated by: Cheng-Yuan Peng, China Medical University Hospital

Relation of Hepatitis B Virus Mutants and the Therapeutic Effect of Peginterferon Alfa-2a in HBeAg-Positive Chronic Hepatitis B

In order to clarify the association between HBV mutations appearing before and during interferon therapy and the therapeutic effects, serial serum samples from 100 HBeAg-positive CHB patients undergoing peginterferon alfa-2a therapy will be collected and analyzed for the mutations of preS/S gene and BCP-preC/C region, particularly for the deletion mutations. Furthermore, Real-Time PCR will be performed to measure the ratios of wild-type HBV and deletion mutant HBV before and at the end of peginterferon alfa-2a therapy. Finally, statistical analysis will be done to elucidate whether the mutations of preS/S gene and BCP-preC/C region have any relation with the therapeutic effect of peginterferon alfa-2a.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Hepatitis B virus (HBV) infection is a serious worldwide health issue. Approximately 400 million people worldwide are chronic hepatitis B (CHB) patients. Currently, two therapeutic methods can be used to treat CHB. One is the nucleos(t)ide analogues, the other is the interferon alfa. Interferon alfa acts mainly by enhancing the immune system and directly inhibits the virus to a limited extent. It is known that mutations at preS, S, basal core promoter, precore and core gene are associated with an increased risk of HCC. However, it remains to be clarified as to the relation between HBV mutations and the therapeutic responses to interferon treatment. In order to clarify the association between HBV mutations appearing before and during interferon therapy and the therapeutic effects, serial serum samples from 100 HBeAg-positive CHB patients undergoing peginterferon alfa-2a therapy will be collected and analyzed for the mutations of preS/S gene and BCP-preC/C region, particularly for the deletion mutations. Furthermore, Real-Time PCR will be performed to measure the ratios of wild-type HBV and deletion mutant HBV before and at the end of peginterferon alfa-2a therapy. Finally, statistical analysis will be done to elucidate whether the mutations of preS/S gene and BCP-preC/C region have any relation with the therapeutic effect of peginterferon alfa-2a.

Study Type

Observational

Enrollment (Actual)

103

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Taiwan
      • Taichung, Taiwan, 404
        • China Medical University Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 65 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

HBeAg-positive chronic hepatitis B

Description

Inclusion Criteria:

HBeAg-positive chronic hepatitis B patients on Peginterferon therapy

Exclusion Criteria:

HBeAg-negative chronic hepatitis B patients HBeAg-positive chronic hepatitis B patients on other kinds of therapy

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Therapeutic response to Peginterferon Alfa-2a in HBeAg-Positive Chronic Hepatitis B
Time Frame: 24 weeks after the end of 24 weeks of Peginterferon alfa-2a treatment
24 weeks after the end of 24 weeks of Peginterferon alfa-2a treatment

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

China Medical University Hospital

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

March 1, 2011

Primary Completion (Actual)

March 1, 2012

Study Completion (Actual)

March 1, 2012

Study Registration Dates

First Submitted

March 8, 2011

First Submitted That Met QC Criteria

March 8, 2011

First Posted (Estimate)

March 10, 2011

Study Record Updates

Last Update Posted (Estimate)

July 30, 2013

Last Update Submitted That Met QC Criteria

July 29, 2013

Last Verified

July 1, 2013

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • DMR99-IRB-313

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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