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. - Full Text View

Sponsored by:	GlaxoSmithKline
Information provided by:	GlaxoSmithKline
ClinicalTrials.gov Identifier:	NCT00197054

Purpose

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 II

MedlinePlus related topics: Malaria

Drug Information available for: Malaria Vaccines

U.S. FDA Resources

Study Type:	Interventional
Study Design:	Prevention, Randomized, Double-Blind, Parallel Assignment, Safety Study
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.

Further study details as provided by GlaxoSmithKline:

Primary Outcome Measures:

Safety of the vaccine up to 7 days post Dose 3.

Secondary Outcome Measures:

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.

Estimated Enrollment:	255
Study Start Date:	July 2005

Detailed Description:

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.

Eligibility

Ages Eligible for Study:	18 Years to 35 Years
Genders Eligible for Study:	Both
Accepts Healthy Volunteers:	Yes

Criteria

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

Contacts and Locations

Please refer to this study by its ClinicalTrials.gov identifier: NCT00197054

Locations

Kenya
GSK Investigational Site
Kisumu, Kenya

Sponsors and Collaborators

GlaxoSmithKline

Investigators

Study Director:

GSK Clinical Trials

GlaxoSmithKline

More Information

Responsible Party:	GSK ( Study Director )
Study ID Numbers:	104743
Study First Received:	September 13, 2005
Last Updated:	October 9, 2008
ClinicalTrials.gov Identifier:	NCT00197054
Health Authority:	United States: Food and Drug Administration

Study placed in the following topic categories:

Protozoan Infections
Parasitic Diseases
Malaria

Additional relevant MeSH terms:

Coccidiosis

ClinicalTrials.gov processed this record on January 16, 2009