Phase 2 Clinical Trial of the BioMed rTSST-1 Variant Vaccine in Healthy Adults
试验速览
- 阶段
- 2 期
- 状态
- 已完成
- 发起方
- 入组人数
- 140
- 试验地点
- 2
- 主要终点
- Number of Participants (Percentage) With Abnormal Laboratory Values and/or Adverse Events That Are Related to Treatment
研究概览
简要总结
Toxic Shock Syndrome (TSS) is a severe condition with high morbidity and mortality from the hosts overwhelming inflammatory response and cytokine storm. Staphylococcal superantigen toxins are the main causative agents. Toxic shock syndrome toxin (TSST-1) being responsible for almost all of menstruation associated and more than 50% of all other cases. There is no specific therapy.
The aim of this study is to extend the safety and tolerability of two doses of the BioMed recombinant toxic shock syndrome toxin (rTSST-1) Variant Vaccine after one to three vaccinations in healthy adults. The second aim of the study is to measure immunogenicity and persistence of antibodies which produced in response to treatment with the BioMed rTSST-1 Variant Vaccine over a period of 12 months. These antibodies are expected to be important in prevention and mitigation of the diseases. 140 healthy adults, male and female, age 18-64 years will be assigned to 7 groups comprising two doses of the vaccine or adjuvant at the Department of Clinical Pharmacology of the Medical University of Vienna. The patients will be monitored for vital signs, hematology, clinical chemistry, and antibodies against TSST-1. Immunization will be repeated 3 months after the first with the same dose and 6 months after the second immunization in the respective groups.
Antibodies will be determined through monitoring TSST-1 binding antibodies as assessed through ELISA and neutralizing antibodies (exploratory endpoint) as assessed by inhibition of T cell activation (3H Thymidine incorporation; ≥ 50%).
详细描述
The BioMed rTSST-1 Variant Vaccine has been developed by Biomedizinische ForschungsgmbH as one component of a polyvalent staphylococcal vaccine for the prevention of toxic shock and hyperimmunization of donors for the production of TSST-1 immunoglobulin.
This is a prospective, randomized, parallel control, phase 2 study of extended safety, local tolerance, immunogenicity, and TSST-1 antibody persistence in healthy adults, who have been vaccinated with one, two or three doses of the BioMed rTSST1 Variant Vaccine compared to adjuvant.
Over a period of 60 days prior to entry into the study, 145 male and female subjects 18 - 64 years in age will be screened for eligibility. Screening criteria will include physical examination, medical history, pregnancy/ adequate contraception in females, HIV Ab, hepatitis C virus antibodies (HCV Ab), hepatitis B antigen (HBs Ag) and TSST-1 Ab. 140 qualified subjects will be entered into the study.
Group 1 will receive 10 µg of rTSST-1 Variant Vaccine and two administrations of Adjuvant; Group 2 will receive the same dose of Vaccine twice and one dose of Adjuvant; and Group 3 will be injected the 10 µg of the Vaccine three times. Groups 4 to 6 will be given 100 µg of Vaccine following the same schedule. Group 7 will receive Al(OH3) adjuvant three times.
Prior to, and 24 h (+3 h) after each vaccination, the subjects will be examined for vital signs. Blood will be drawn for hematology, clinical chemistry tests, and C-reactive protein. Local reactions and adverse events will be assessed in all post vaccination visits.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Sequential
- 主要目的
- Treatment
- 盲法
- Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
入排标准
- 年龄范围
- 18 Years 至 64 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •males or females aged 18-64 years
- •signed informed consent
- •physical exam: no abnormal findings unless considered irrelevant by the investigator
- •uneventful medical history
- •Females with childbearing potential: adequate contraception
排除标准
- •females with childbearing potential: pregnancy, lactation or unreliable contraception
- •positive HIV Ab and/or positive HCV Ab and/or positive HBsAG signs and symptoms of autoimmunity
- •TSST-1 Ab titer > 1:1000
- •current or recent (< 1 month) immunosuppressive therapy with corticosteroids or immunomodulators
结局指标
主要结局
Number of Participants (Percentage) With Abnormal Laboratory Values and/or Adverse Events That Are Related to Treatment
时间窗: 12 months and 18 months follow up
次要结局
- Number of Participants With a Fold Increase of ELISA IgG Against rTSST-1(12 months and 18 months follow up)