Immune Response to Hepatitis B Vaccine Challenge Dose in Subjects Who Received a Primary Neonatal Hepatitis B Vaccine.

This study has been completed.
Information provided by:
GlaxoSmithKline Identifier:
First received: April 4, 2007
Last updated: May 21, 2009
Last verified: May 2009
The current study will evaluate immunological memory to hepatitis B antigen in subjects who received primary neonatal vaccination of hepatitis B vaccine (Engerix™-B ), 20 years ago in the primary study and who have anti-HBs antibody concentrations < pre-defined cut-off values at the previous long-term time point. All participating subjects will receive a challenge dose of hepatitis B vaccine. Subjects will be aged approximately 20-21 years at the time of this study. No new subjects will be recruited in this long-term follow-up study. Blood sampling will be done one month after the administration of the challenge dose. The Protocol Posting has been updated in order to comply with the FDA Amendment Act, Sep 2007.

Condition Intervention Phase
Hepatitis B
Biological: Engerix™-B
Phase 4

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Prevention
Official Title: To Evaluate Immune Response to a Hepatitis B Vaccine (Engerix™-B ) Challenge Dose in Healthy Subjects Who Received GSK Biologicals' Hepatitis B Vaccine (Engerix™-B ) Approximately 20 Years Ago as Primary Vaccination at 0, 1, 2 and 12 Months.

Resource links provided by NLM:

Further study details as provided by GlaxoSmithKline:

Primary Outcome Measures:
  • Number of Participants With Anti-Hepatitis B Surface Antigen (Anti-HBs) Antibody Concentrations Above Specific Cut-Off Values [ Time Frame: One month after the hepatitis B vaccine challenge dose ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • Occurrence, Intensity and Relationship to Vaccination of Unsolicited Adverse Events (AEs) [ Time Frame: During the 31-day follow-up period after the challenge dose of hepatitis B vaccine. ] [ Designated as safety issue: No ]
  • Number of Participants Reporting Any Serious Adverse Events (SAEs). [ Time Frame: Up to 1 month after the challenge dose. ] [ Designated as safety issue: No ]

Enrollment: 76
Study Start Date: April 2007
Study Completion Date: January 2008
Primary Completion Date: January 2008 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Group Engerix™-B
Subjects received a dose of Hepatitis B vaccine approximately 20 years after the primary neonatal vaccination
Biological: Engerix™-B
Intramuscular injection, 1 dose
Other Name: Hepatitis B vaccine


Ages Eligible for Study:   20 Years to 21 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Subjects who the investigator believes that they can and will comply with the requirements of the protocol should be enrolled in the study.
  • A male or female adult who received the complete neonatal primary vaccination course of hepatitis B vaccine in primary study approximately 20 years earlier.
  • Documented level of anti-HBs antibody concentrations < specified concentration at the previous long-term time point for which serological results are available for that subject.
  • Written informed consent obtained from the subject.
  • Healthy subjects as established by medical history and clinical examination before entering into the study.
  • If the subject is female, she must be of non-childbearing potential or if she is of childbearing potential, she must practice adequate contraception for 30 days prior to vaccination, have a negative pregnancy test and continue such precautions for 2 months after completion of the hepatitis B challenge dose.

Exclusion Criteria:

  • Chronic administration (defined as more than 14 days) of immunosuppressants or other immune-modifying drugs within six months prior to the hepatitis B vaccine challenge dose.
  • Administration of a vaccine not foreseen by the study protocol during the study period.
  • Administration of immunoglobulins and/or any blood products during the study period.
  • Drug and/or alcohol abuse.
  Contacts and Locations
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Please refer to this study by its identifier: NCT00456625

GSK Investigational Site
Bangkok, Thailand, 10330
Sponsors and Collaborators
Study Director: GSK Clinical Trials GlaxoSmithKline
  More Information

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Study Director, GSK Identifier: NCT00456625     History of Changes
Other Study ID Numbers: 108984 
Study First Received: April 4, 2007
Results First Received: January 15, 2009
Last Updated: May 21, 2009
Health Authority: Thailand: not applicable

Keywords provided by GlaxoSmithKline:
Challenge dose
Hepatitis B vaccine

Additional relevant MeSH terms:
Hepatitis A
Hepatitis B
DNA Virus Infections
Digestive System Diseases
Enterovirus Infections
Hepadnaviridae Infections
Hepatitis, Viral, Human
Liver Diseases
Picornaviridae Infections
RNA Virus Infections
Virus Diseases
Immunologic Factors
Physiological Effects of Drugs processed this record on May 24, 2016