Phase 1 Clinical Trial of the BioMed rTSST-1 Variant Vaccine in Healthy Adults
Trial Snapshot
- Phase
- Phase 1
- Status
- Completed
- Sponsor
- Enrollment
- 46
- Locations
- 2
- Primary Endpoint
- Number of Participants With Adverse Events as a Measure of Safety and Tolerability
Study Overview
Brief Summary
Toxic Shock Syndrome (TSS) a severe condition with high morbidity and mortality results 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 demonstrate the safety and tolerability of the BioMed recombinant toxic shock syndrome toxin (rTSST-1) Variant Vaccine in healthy adults. The second aim of the study is to measure antibodies in the blood of these healthy volunteers which have been produced in response to treatment with the BioMed rTSST-1 Variant Vaccine. These antibodies are expected to be important in resistance against the diseases. 46 healthy adults, male and female, age 18-64 years will be assigned to 6 dose groups of the vaccine at the Department of Clinical Pharmacology of the Medical University of Vienna. The patients will be monitored for vital signs, hematology, clinical chemistry, blood cytokine level and antibodies against TSST-1. Immunization will be repeated 4 weeks after the first with the same dose.
Detailed Description
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, partly randomized, parallel control, dose escalation study of the safety and immunogenicity of the BioMed rTSST1 Variant Vaccine compared to adjuvant in healthy adults.
28 - 3 days prior to entry into the study, 50 male and female subjects 18 - 64 years in age will be screened for eligibility , screening criteria to 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. 46 of these subjects will be entered into the study.
In a first step, two subjects will receive the adjuvanted Vaccine containing 100 ng rTSST-1 Ag and one subject will receive the adjuvant containing 0.2 mg Al(0H)3 only (Group 1). The subjects will be seen four times after immunization in a period of 14 days (6 h, 48 h + 2 hrs, 7 + 1 days and 14 + 2 days).Tests and examinations will include vital signs, hematology and clinical chemistry parameters, C-reactive protein, cytokines, TSST-Ab , local reactions and adverse events.
In the absence of clinically relevant adverse events , another three subjects will be entered into the study one week later, two of them to receive the adjuvanted Vaccine containing 300 ng rTSST-1 Ag, one receiving the adjuvant containing 0.6 mg Al(0H)3 (Group 2) and be followed for a period of 14 days as described above.
Study Design
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Parallel
- Primary Purpose
- Treatment
- Masking
- Triple (Participant, Care Provider, Investigator)
Eligibility Criteria
- Ages
- 18 Years to 64 Years (Adult)
- Sex
- All
- Accepts Healthy Volunteers
- Yes
Inclusion Criteria
- •male and female
- •18 - 64 years
- •written informed consent
- •physical exam: no abnormal findings unless considered irrelevant by the investigator
- •uneventful medical history
- •females: adequate contraception
Exclusion Criteria
- •pregnancy
- •positive virology markers
- •signs and symptoms of relevant autoimmunity
- •TSST-1 Ab titer > 1:2000
Outcomes
Primary Outcomes
Number of Participants With Adverse Events as a Measure of Safety and Tolerability
Time Frame: through day 70
Clinical observations and clinical laboratory values
Secondary Outcomes
- Number of Participants With Seroconversion(through day 70)