Hepatitis B Clinical Trial
Official title:
An Open Single Centre Study to Evaluate the Long-term Antibody Persistence and Immune Memory Between 16 and 20 Years After the Primary Study HAB-028 (208127/021) in Which Healthy Adults Were Vaccinated With Twinrix Adult Following a Three-dose Schedule.
Verified date | January 2018 |
Source | GlaxoSmithKline |
Contact | n/a |
Is FDA regulated | No |
Health authority | |
Study type | Interventional |
This study will evaluate the persistence of the immune response to HAV (Hepatitis A Virus)
antigens and HBs (Hepatitis B surface) antigens in healthy adults previously vaccinated with
GlaxoSmithKline (GSK) Biologicals' Twinrix Adult. The subjects will be invited for blood
sampling 16, 17, 18, 19 and 20 years after vaccination to evaluate the antibody persistence.
For subjects in whom low circulating antibodies are detected, the presence of immune memory
against hepatitis A & B antigens will be investigated by the administration of a challenge
dose of the appropriate vaccine (Havrix and/or Engerix-B) at the next planned visit.
No new subjects will be recruited during this study.
Status | Completed |
Enrollment | 44 |
Est. completion date | July 25, 2014 |
Est. primary completion date | July 25, 2014 |
Accepts healthy volunteers | Accepts Healthy Volunteers |
Gender | All |
Age group | N/A and older |
Eligibility |
Inclusion Criteria: All subjects must satisfy the following criteria at entry into each of the long-term follow-up visits: - 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 who received the complete primary vaccination course in the primary study Hepatitis A and B vaccine (HAB), HAB-028 (208127/021). - Written informed consent obtained from the subject. All subjects must satisfy the following criteria at entry into the challenge dose phase: - Subjects who the investigator believes that they can and will comply with the requirements of the protocol. - A male or female who received the complete primary vaccination course in the primary study HAB-028 (208127/021). - Written informed consent obtained from the subject. - Subjects who participated in the long-term follow-up (LTFU) phase of the HAB-028 (208127/021) study and for whom the antibody concentrations were below the cut-off at the last available follow-up time-point. - Female subjects of non-childbearing potential may be enrolled in the study. - Female subjects of childbearing potential may be enrolled in the study, if the subject: - has practiced adequate contraception for 30 days prior to vaccination, and - has a negative pregnancy test on the day of vaccination, and - has agreed to continue adequate contraception for two months after the administration of the challenge dose. Exclusion Criteria: The following criteria should be checked before entry into each of the long-term follow-up visits. If any exclusion criterion applies, the subject must not be included in the study: - Use of any investigational or non-registered product within 30 days prior to blood sampling. - Administration of a hepatitis A, hepatitis B or combined hepatitis A and B vaccine outside the study procedures, since the primary study HAB-028 (208127/021). - History of hepatitis A or hepatitis B infection since the primary study HAB-028 (208127/021). - Administration of hepatitis A or hepatitis B immunoglobulins and/or any blood products within three months prior to blood sampling. The following criteria should be checked before the challenge dose is administered. If any apply, the subject must not be included in the challenge dose phase: - Use of any investigational or non-registered product within 30 days prior to study start or planned use during the study. - Administration of a hepatitis A, hepatitis B or combined hepatitis A and B vaccine between the last LTFU visit and the challenge dose visit. - History of hepatitis A or hepatitis B infection between the last LTFU visit and the challenge dose visit. - History of anaphylactic reactions following the administration of vaccines. - History of any reaction or hypersensitivity likely to be exacerbated by any component of the vaccines. - Acute disease and/or fever at the time of enrolment. - Pregnant or lactating female. - Female planning to become pregnant or planning to discontinue contraceptive precautions. |
Country | Name | City | State |
---|---|---|---|
Belgium | GSK Investigational Site | Wilrijk |
Lead Sponsor | Collaborator |
---|---|
GlaxoSmithKline |
Belgium,
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | Number of Subjects Seropositive for Anti-hepatitis A Virus Antibodies (Anti-HAV) and Anti-hepatitis B Surface Antigen (Anti-HBs) Antibodies and With Anti-HBs Antibody Concentrations >= 10 Milliinternational Units Per Milliliter (mIU/mL) | Seropositivity for anti-HAV antibodies is defined as antibody concentrations >= 15 milliinternational units per milliliter (mIU/mL). Seropositivity for anti-HBs antibodies is defined as antibody concentrations >= 6.2 mIU/mL. | At Years 16, 17, 18, 19 and 20. | |
Primary | Anti-HAV and Anti-HBs Geometric Mean Concentrations (GMCs) | Concentrations were expressed as GMCs in mIU/mL. | At Years 16, 17, 18, 19 and 20. | |
Secondary | Number of Subjects With Immune Response to the Challenge Vaccine Antigen | None of the subjects received a challenge dose at Years 16, 17, 18 and 20 while, one subject received the challenge dose at Year 19. | Before, 14 days and one month after the challenge dose at Year 19. | |
Secondary | Anti-hepatitis B Virus (Anti-HBs) Antibody Concentration | Concentrations are given as Geometric Mean Concentrations (GMCs) expressed as mIU/mL. | At Year 18, 14 days and 30 days post challenge dose (Year 19). | |
Secondary | Number of Subjects Reporting Unsolicited Adverse Events (AE) | An unsolicited AE was defined as any AE (i.e. any untoward medical occurrence in a patient or clinical investigation subject, temporally associated with use of a medicinal product, whether or not considered related to the medicinal product) reported in addition to those solicited during the clinical study and any solicited symptom with onset outside the specified period of follow-up for solicited symptoms. Any was defined as occurrence of any unsolicited symptom regardless of intensity grade or relation to vaccination. | During the 31-day (Day 0 to 30) period after administration of the challenge dose at Year 19. | |
Secondary | Number of Subjects Reporting Serious Adverse Events (SAEs) | A serious adverse event was any untoward medical occurrence that: resulted in death, was life threatening, required hospitalization or prolongation of hospitalization, resulted in disability/incapacity or was a congenital anomaly/birth defect in the offspring of a study subject. Any was defined as occurrence of any symptom regardless of intensity grade or relation to vaccination and related was an event assessed by the investigator as causally related to the study vaccination. | During the 31-day (Day 0 to 30) period after administration of the challenge dose at Year 19. | |
Secondary | Number of Subjects Reporting Serious Adverse Events (SAEs) | A serious adverse event is any untoward medical occurrence that: resulted in death, was life threatening, required hospitalization or prolongation of existing hospitalization, resulted in disability/incapacity, or was a congenital anomaly/birth defect in the offspring of a study subject, or may evolve into one of the outcomes listed above. Any was defined as occurrence of any symptom regardless of intensity grade or relation to vaccination and related was an event assessed by the investigator as causally related to the study vaccination. | Up to Year 20. |
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