Retroviral vectors capable of transducing non-dividing cells

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 15/86 (2006.01) C12N 5/10 (2006.01) C12N 7/01 (2006.01) C12N 15/867 (2006.01)

Patent

CA 2265522

In accordance with the present invention, methods have been developed to modify retroviral vectors derived from viruses which are not known to be pathogenic in humans (e.g., MLV), so that such vectors are rendered capable of transducing heterologous sequences into non-dividing cells. Thus, it has been discovered that retroviruses can be rendered capable of infecting non-dividing cells by introducing into the viral particle one of several specifically defined modifications. For example, an element which is recognized by the nuclear import machinery of a non-dividing cell can be associated with the nucleoprotein complex of the retrovirus. Alternatively, at least one protein encoded by viral gag or pol nucleic acid is modified so as to be recognized by the nuclear import machinery of a non-dividing cell.

Selon la présente invention, on a mis au point des procédés destinés à modifier des vecteurs rétroviraux dérivés de virus qui ne sont pas connus comme étant pathogènes chez l'homme (par exemple le virus de la leucémie murine de Moloney), afin que ces vecteurs puissent transduire des séquences hétérologues dans des cellules ne se divisant pas. Ainsi, on a découvert que l'on pouvait rendre des rétrovirus capables d'infecter des cellules ne se divisant pas, en introduisant dans la particule virale l'une de ces modifications déterminées bien précisément. Par exemple, on peut associer un élément reconnu par le mécanisme d'importation nucléaire d'une cellule ne se divisant pas, au complexe de nucléoprotéines du rétrovirus. Dans un autre mode de réalisation, on modifie au moins une protéine codée par l'acide nucléique viral gag ou pol, de façon que cette protéine soit reconnue par le mécanisme d'importation nucléaire d'une cellule ne se divisant pas.

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