Leporipox-based vector vaccines

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 15/86 (2006.01) A61K 39/12 (2006.01) A61K 39/21 (2006.01) A61K 39/275 (2006.01) C12N 15/863 (2006.01)

Patent

CA 2439872

The present invention is directed to the use of a live, recombinant leporipox virus comprising exogenous DNA which is operably linked to at least one expression control element and which is incorporated in a non-essential region of the virus genome, in the manufacture of a vector vaccine for the treatment and/or prophylaxis of infectious diseases in non-lepori species. The invention furthermore relates to a live, recombinant leporipox virus comprising exogenous DNA operably linked to at least one expression control element and incorporated in a non-essential region of the virus genome characterized in that said exogenous DNA encodes at least one antigen of a non-lepori pathogen. Due to its restricted host-range the recombinant leporipox virus is non- pathogenic in non-susceptible hosts such as non-lepori vertebrates. Vaccination with said recombinant leporipox virus induced an antigenic or immunogenic response in the vaccinated non-lepori host even though productive replication of the virus was not observed in the host.

L'invention concerne l'utilisation d'un virus vivant de leporipox de recombinaison comprenant un ADN exogène relié à au moins un élément de contrôle d'expression et incorporé dans une zone non essentielle du génome viral, ce virus servant à préparer un vaccin vectoriel pour le traitement et/ou la prophylaxie de maladies infectieuses dans des espèces autres que lepori. Elle concerne, de plus, un virus vivant de leporipox de recombinaison comprenant un ADN exogène relié à au moins un élément de contrôle d'expression et incorporé dans une zone non essentielle du génome viral caractérisé par le fait que ledit ADN exogène code pour au moins un antigène d'un pathogène autre que lepori. Etant donné sa plage de réception restreinte, ce virus de leporipox est non pathogène chez des hôtes non susceptibles, tels que des vertébrés autres que lepori. La vaccination au moyen de ce virus de leporipox a induit une réponse antigénique ou immunogène chez l'hôte vacciné autre que lepori, bien qu'on n'ait pas observé de réplication productive du virus.

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