A Study to Evaluate Safety, Immunogenicity and Proof-of-concept of RTS,S/AS02A, and RTS,S/AS01B, Two Candidate Malaria Vaccines in Malaria-experienced Adults Living in Western Kenya.
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The candidate malaria vaccine RTS,S/AS02A developed by GSK Biologicals demonstrated 30% efficacy against clinical episodes of malaria and approximately 58% efficacy against severe malaria disease. As a potential improvement to RTS,S/AS02A, another candidate vaccine RTS,S/AS01B is being developed in parallel in collaboration with the Walter Reed Army Institute of Research (WRAIR). This study will be the first administration of the RTS,S/AS01B vaccine to the African adults to establish safety and immunogenicity in this population. Preliminary indication of vaccine efficacy with this adjuvant will be established by monitoring the time to the first infection with Plasmodium falciparum.
Condition | Intervention | Phase |
---|---|---|
Plasmodium Falciparum |
Biological: RTS,S/AS02A and RTS,S/AS01B |
Phase 2 |
Study Type: | Interventional |
Study Design: | Allocation: Randomized Endpoint Classification: Safety Study Intervention Model: Parallel Assignment Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor) Primary Purpose: Prevention |
Official Title: | A Phase IIb Randomized, Double-blind, Controlled Study of the Safety, Immunogenicity and Proof-of-concept of RTS,S/AS02A, and RTS,S/AS01B, Two Candidate Malaria Vaccines in Malaria-experienced Adults Living in Western Kenya. |
- Safety of the vaccine up to 7 days post Dose 3.
- Safety of the vaccine upto 4 months post Dose 3. Antibody levels for relevant immunological indicators up to 4 months post Dose 3. Efficacy of the vaccine against malaria infection up to 4 months post Dose 3.
Enrollment: | 255 |
Study Start Date: | July 2005 |
Study Completion Date: | September 2006 |
Primary Completion Date: | September 2006 (Final data collection date for primary outcome measure) |
The study comprises of 3 groups and the participating subjects will be randomly allocated to one of the three groups. The first group will receive RTS,S/AS01B, the second group will receive RTS,S/AS02A and the third group will receive rabies vaccine. Immunization will be given by IM injection on 0, 1, 2 month schedule. Infants will be followed up daily for 7 days for solicited symptoms and 30 days for unsolicited symptoms after each vaccine dose. Serious adverse events will be recorded throughout the study period. A week prior to Dose 3, subjects will be treated with a licenced anti-malarial drug. Starting from two weeks after Dose 3, the subjects will be monitored for a 14-week duration for detection of malaria infection.
Ages Eligible for Study: | 18 Years to 35 Years |
Genders Eligible for Study: | Both |
Accepts Healthy Volunteers: | Yes |
Inclusion criteria:
- Healthy male or female volunteers aged between 18 and 35 years at the time of first vaccination who have given written consent for their participation in the study were included
- If the volunteer is female, she must be of non-childbearing potential, i.e. either surgically sterilized or one year post-menopausal; or, if of childbearing potential, she must be abstinent or have used adequate contraceptive precautions for 30 days prior to vaccination, have a negative pregnancy test and must agree to continue such precautions for two months after completion of the vaccination series
Exclusion criteria:
- If a subject plans to take vaccine not foreseen by the study protocol within 30 days of the first dose of vaccine(s) with the exception of tetanus toxoid will be excluded
- Volunteers with any confirmed or suspected immunosuppressive or immunodeficient conditions
- Family history of congenital or hereditary immunodeficiency
- History of allergic reactions to previous immunizations
- HBsAg positive subjects
- History of splenectomy
- Pregnant or lactating females will be excluded from the study
Kenya | |
U.S. Army Research Unit-Kenya | |
Kisumu, Kenya |
Study Director: | GSK Clinical Trials | GlaxoSmithKline |
No publications provided by U.S. Army Medical Research and Materiel Command
Additional publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
Responsible Party: | Cheri Hudson; Clinical Disclosure Advisor, GSK Clinical Disclosure |
ClinicalTrials.gov Identifier: | NCT00197054 History of Changes |
Other Study ID Numbers: | 104743 |
Study First Received: | September 13, 2005 |
Last Updated: | February 10, 2012 |
Health Authority: | United States: Food and Drug Administration |
Additional relevant MeSH terms:
Malaria Protozoan Infections Parasitic Diseases |
ClinicalTrials.gov processed this record on October 16, 2012