Long-Term Follow-up of Children for a 2-Year Period to Confirm the Safety and Immunogenicity of GSK 257049 Vaccine

Summary

The RTS,S/AS02A vaccine (or GSK 257049 vaccine), GSK Biologicals' candidate Plasmodium falciparum (P. falciparum) malaria vaccine is being developed for the routine immunization of infants and children living in malaria endemic areas. The vaccine would offer protection against malaria disease due to the parasite P. falciparum. The vaccine would also provide protection against infection with hepatitis B virus (HBV). This phase IIb trial is being carried out following the demonstration of efficacy of the candidate malaria vaccine in children in Mozambique: there, the vaccine demonstrated approximately 30% efficacy against clinical episodes of malaria and approximately 58% efficacy against severe malaria disease. In this study, the children from Mozambique (NCT= NCT00197041) are followed-up to assess the safety, immunogenicity and efficacy of the candidate malaria vaccine for a two year period commencing 21 months after Dose 1. This protocol posting deals with objectives \& outcome measures of the extension phase at year 2. During this extension study, no new subjects will be recruited and no vaccine will be administered. The Protocol Posting has been updated in order to comply with the FDA Amendment Act, Sep 2007.

Timeline

Start

2005-04

Primary completion

2007-05

Completion

2007-05

Publications

• Background Alonso PL, Sacarlal J, Aponte JJ, Leach A, Macete E, Aide P, Sigauque B, Milman J, Mandomando I, Bassat Q, Guinovart C, Espasa M, Corachan S, Lievens M, Navia MM, Dubois MC, Menendez C, Dubovsky F, Cohen J, Thompson R, Ballou WR. Duration of protection with RTS,S/AS02A malaria vaccine in prevention of Plasmodium falciparum disease in Mozambican children: single-blind extended follow-up of a randomised controlled trial. Lancet. 2005 Dec 10;366(9502):2012-8. doi: 10.1016/S0140-6736(05)67669-6.
• Background Aponte et al. A 4 years follow-up of the safety, immunogenicity and efficacy of the candidate malaria vaccine RTS,S/AS02A in children vaccinated at aged 1 to 4 years in a malaria-endemic region of Mozambique. Abstract presented at the 56th Annual Meeting ASTMH, Philadelphia, PA, USA, 05-07 November 2007.
• Background Sacarlal J, Aide P, Aponte JJ, Renom M, Leach A, Mandomando I, Lievens M, Bassat Q, Lafuente S, Macete E, Vekemans J, Guinovart C, Sigauque B, Sillman M, Milman J, Dubois MC, Demoitie MA, Thonnard J, Menendez C, Ballou WR, Cohen J, Alonso PL. Long-term safety and efficacy of the RTS,S/AS02A malaria vaccine in Mozambican children. J Infect Dis. 2009 Aug 1;200(3):329-36. doi: 10.1086/600119.
• Aide P, Dobano C, Sacarlal J, Aponte JJ, Mandomando I, Guinovart C, Bassat Q, Renom M, Puyol L, Macete E, Herreros E, Leach A, Dubois MC, Demoitie MA, Lievens M, Vekemans J, Loucq C, Ballou WR, Cohen J, Alonso PL. Four year immunogenicity of the RTS,S/AS02(A) malaria vaccine in Mozambican children during a phase IIb trial. Vaccine. 2011 Aug 11;29(35):6059-67. doi: 10.1016/j.vaccine.2011.03.041. Epub 2011 Apr 7.

Drugs

Indications