Fusion proteins for intracellular and intercellular...

C - Chemistry – Metallurgy – 12 – N

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C12N 15/62 (2006.01) C07K 14/035 (2006.01) C07K 14/47 (2006.01) C12N 15/79 (2006.01)

Patent

CA 2278002

Coupled polypeptides and fusion polypeptides for intracellular transport, and their preparation and use, include (i) an aminoacid sequence with the transport function of herpesviral VP22 protein (or homologue, e.g. from VZV, BHV or MDV) and (ii) another protein sequence selected from (a) proteins for cell cycle control; (b) suicide proteins; (c) antigenic sequences or antigenic proteins from microbial and viral antigens and tumour antigens; (d) immunomodulating proteins; and (e) therapeutic proteins. The coupled proteins can be used for intracellular delivery of protein sequences (ii), to exert the corresponding effector function in the target cell, and the fusion polypeptides can be expressed from corresponding polynucleotides, vectors and host cells.

La présente invention concerne des polypeptides couplés et des polypeptides hybrides permettant le transport intracellulaire, ainsi que leur préparation et leur utilisation. Lesdits polypeptides contiennent (i) une séquence d'acides aminés dotée de la fonction de transport de la protéine du virus de l'herpès VP22 (ou d'un homologue provenant par exemple du virus varicelle-zona, du virus-herpès bovin ou du virus MDV) et (ii) une autre séquence de protéine sélectionnée à partir de (a) protéines permettant la régulation du cycle cellulaire; (b) de protéines suicide; (c) de séquences antigéniques ou de protéines antigéniques provenant d'antigènes microbiens et viraux et d'antigènes tumoraux; (d) de protéines immunomodulatrices; et (e) de protéines thérapeutiques. On peut utiliser les protéines couplées pour l'administration intracellulaire de séquences de protéines (ii), pour exercer la fonction effectrice correspondante dans la cellule cible, et on peut exprimer les polypeptides hybrides à partir des polynucléotides, vecteurs et cellules hôtes correspondants.

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