HBV Envelope Proteins Variability on HBs Antigen Clearance Under Nucleos(t)Ide Analogue Therapy

November 20, 2017 updated by: Central Hospital, Nancy, France

Influence of Hepatitis B Virus (HBV) Envelope Glycoprotein Characteristics on HBsAg Clearance on Anti-HBV Treatment by Nucleos(t)Ide Analogues

Hepatitis B virus (HBV) infection remains difficult to eradicate with about 240 million people living with HBV chronic infection. HBsAg clearance, correlated with a good clinical prognosis, is difficult to achieve even with antiviral treatments (3-14 %). HBV envelope proteins are essential for entry into hepatocyte and are targeted by the immune system. Molecular characteristics of HBV envelope proteins may favour better viral fitness at the entry step into hepatocytes and/or HBV escape from host immunity. Here we investigated whether variability of HBV envelope proteins can contribute to the differential responses to anti-HBV treatment in patients with HBsAg clearance or persistence.

Study Overview

Status

Completed

Conditions

Detailed Description

Our study is a retrospective study of patients with chronic hepatitis B virus, selected exclusively at the University Hospital Center of Nancy in the Department of Hepato-Gastroenterology (HGE). the patient inclusion criteria were as follows: Adult patients with chronic hepatitis B, treated with nucleos(t)ide analogues, mono-infected with HBV (without co-infection with HCV, HIV and HDV). For each patient included, biological, clinical and therapeutic data were collected retrospectively. Patients with loss of viral load on treatment were included in this study. Among them, patients showed either a clearance of HBsAg on treatment ("responders") or the control patients showed a persistence of HBsAg on treatment ("non-responders", control patients).

Study Type

Observational

Enrollment (Actual)

19

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 and older (Adult, Older Adult)

Accepts Healthy Volunteers

N/A

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Our study is a retrospective study of patients with chronic hepatitis B virus, selected exclusively at the University Hospital Center of Nancy in the Department of Hepato-Gastroenterology (HGE). the patient inclusion criteria were as follows: Adult patients with chronic hepatitis B, treated with nucleos(t)ide analogues, mono-infected with HBV (without co-infection with HCV, HIV and HDV). For each patient included, biological, clinical and therapeutic data were collected retrospectively. Patients with loss of viral load on treatment were included in this study. Among them, patients showed either a clearance of HBsAg on treatment ("responders") or the control patients showed a persistence of HBsAg on treatment ("non-responders", control patients).

Description

Inclusion Criteria:

  • adults
  • patients with chronic hepatitis B
  • treated with nucleos(t)ide analogues
  • mono-infected with HBV (without co-infection with HCV, HIV and HDV)

Exclusion Criteria:

  • minor
  • pregnant women
  • patients with VHC or VHD

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
Measure Description
Time Frame
Clearance of Hepatitis B surface antigen (HBsAg)
Time Frame: May 2016 (manuscript Velay et al., 2016)
Subgroup of patients infected by HBV genotype D
May 2016 (manuscript Velay et al., 2016)

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Clearance of Hepatitis B surface antigen (HBsAg)
Time Frame: September 2017 (manuscript Eschlimann et al., 2017)
Subgroup of patients infected by HBV genotype A
September 2017 (manuscript Eschlimann et al., 2017)

Collaborators and Investigators

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

Sponsor

Central Hospital, Nancy, France

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 (Actual)

November 5, 2013

Primary Completion (Actual)

May 1, 2016

Study Completion (Actual)

September 1, 2017

Study Registration Dates

First Submitted

September 29, 2017

First Submitted That Met QC Criteria

November 20, 2017

First Posted (Actual)

November 22, 2017

Study Record Updates

Last Update Posted (Actual)

November 22, 2017

Last Update Submitted That Met QC Criteria

November 20, 2017

Last Verified

September 1, 2017

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • DC 2013-1801

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

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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