A Long-term Follow-up of a Phase I/II Study to Compare the Persistence and to Perform in Depth Characterisation of the Cellular and Humoral Immune Response Following Vaccinations With GSK Biologicals' Candidate Vaccines Containing HBsAg and Different Adjuvants in Healthy Adult Volunteers
试验速览
- 阶段
- 1 期
- 状态
- 已完成
- 入组人数
- 93
- 试验地点
- 3
- 主要终点
- Frequency of CD4 and CD8 T cells expressing IFN-γ and/or TNF-α and/or IL-2 and/or CD40L upon short term in vitro stimulation with HbsAg derived peptides using cytokine flow cytometry.
研究概览
简要总结
The purpose of this long-term follow-up study was to evaluate the persistence of the cellular and the humoral immune response 4 years after the first dose of GSK Biologicals' investigational vaccine formulations containing HBsAg (used as a model antigen) and an adjuvant.
详细描述
Subjects in this long-term follow-up study were recruited among those subjects who completed the study 287615 (NCT00508833) and who were enrolled in specific groups. All subjects were vaccinated in the study 287615 (NCT00508833) according to a 0, 1, 10 month schedule. No new subjects were enrolled and no vaccine was administered in this long-term follow-up study. There was a single visit at Year 4 at which blood samples for immunogenicity assays were taken.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Prevention
- 盲法
- None
入排标准
- 年龄范围
- 22 Years 至 45 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Subjects who the investigator believes can and will comply with the requirements of the protocol.
- •Subjects who took part in and completed study 287615 (NCT00508833).
- •Written informed consent obtained from the subject.
- •Healthy subjects as established by medical history before entering into the study.
排除标准
- •Use of any investigational or non-registered product other than the study vaccine(s) within 30 days preceding the blood sampling, or planned use during the study period.
- •Chronic administration of immunosuppressants or other immune-modifying drugs within three months prior to the blood sampling.
- •Administration of immunoglobulins within the three months preceding the blood sampling or planned administration during the study period.
- •Pregnant or lactating female.
- •Documented HIV-positive subject.
结局指标
主要结局
Frequency of CD4 and CD8 T cells expressing IFN-γ and/or TNF-α and/or IL-2 and/or CD40L upon short term in vitro stimulation with HbsAg derived peptides using cytokine flow cytometry.
时间窗: Year 4.
次要结局
- Exploratory analysis of proteins and low molecular weight biomolecules in the serum using ELISA and other techniques to be defined.(Day 0, Day 1.)
- Frequency of HBsAg specific memory B cells by B Cell Elispot assay.(Week 48, Week 78, Year 4.)
- Frequency of HBs-specific or non specific T regulatory cells using cytokine flow cytometry and other techniques to be defined.(Day 0, Week 6, Week 46, Week 48.)
- Anti-HBs antibody titres as measured by ELISA.(Week, 48, Week 78, Year 4.)