Crucell Holland B.v.

Bestewil Holding B.v.

Antonius J H Stegmann

Maria Grazia Pau

Lennart Holterman

Jorn Kaspers

Described are vaccines against malarial infections, which are based on recombinant viral vectors, such as alpha viruses, adenoviruses, or vaccinia viruses. The recombinant viral-based vaccines can be used to immunize against differentinfections, such as infections byor. Codon-optimized circumsporozoite genes are disclosed. Replication-defective adenoviruses may be used, derived from serotypes that encounter low titers of neutralizing antibodies. Also described is the use of different adenoviral serotypes that are administered to elicit a strong immune response, either in single vaccination set-ups or in prime-boost set-ups in which compositions based on different serotypes can be applied.

Recombinant viral-based malaria vaccines

The present invention relates to novel vaccines against malaria infections, based on recombinant viral vectors, such as alpha viruses, adenoviruses or vaccinia viruses. The recombinant viral-based vaccines can be used to immunize against differentinfections, such as infections byor. Novel codon-optimized circumsporozoite genes are disclosed. Preferably, replication-defective adenoviruses are used, derived from serotypes that encounter low titers of neutralizing antibodies. The invention, therefore, also relates to the use of different adenoviral serotypes that are administered to elicit a strong immune response, either in single vaccination set-ups or in prime-boost set-ups in which compositions based on different serotypes can be applied.

The present invention provides methods and means for preparing vaccines that are capable of eliciting strong immune responses, especially through intranasal delivery. The invention discloses particles, referred to as 'co-micelles,' in which antigens are present that interact through hydrophobic interactions with certain specific types of amphiphilic compounds, wherein the amphiphilic compounds have adjuvant activity and wherein the antigens are preferably antigenic surface proteins, such as integral membrane proteins from infectious agents like viruses.

Compositions comprising antigen-complexes, method of making same as well as methods of using the antigen-complexes for vaccination

The present invention relates to novel vaccines against malaria infections, based on recombinant viral vectors, such as alpha viruses, adenoviruses or vaccinia viruses. The recombinant viral-based vaccines can be used to immunize against differentinfections, such as infections byorNovel codon-optimized circumsporozoite genes are disclosed. Preferably, replication-defective adenoviruses are used, derived from serotypes that encounter low titers of neutralizing antibodies. The invention, therefore, also relates to the use of different adenoviral serotypes that are administered to elicit a strong immune response, either in single vaccination set-ups or in prime-boost set-ups in which compositions based on different serotypes can be applied.

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Katwijk, Netherlands

Antonius J H Stegmann