Abstract: The present invention relates to retroviral particle comprising a protein derived from the Gag polyprotein, an envelope protein, optionally an integrase and at least two encapsidated non-viral RNAs, the encapsidated non-viral RNAs each comprising an RNA sequence of interest bound to an encapsidation sequence, each encapsidation sequence being recognized by a binding domain introduced into the protein derived from the Gag polyprotein and/or into the integrase, and at least one of said sequences of interest of the encapsidated non-viral RNAs comprises a part coding at least one epitope and/or at least one molecular structure specifically recognizing an epitope.

Abstract: The present invention relates to a retro viral system for the transfer of non-viral RNA into target cells and more particularly a retroviral particle capable of delivering multiple RNAs. More particularly, it relates to retroviral particles comprising a protein derived from the Gag polyprotein, an envelope protein, optionally an integrase and at least two encapsidated non-viral RNAs, the encapsidated non-viral RNAs each comprising an RNA sequence of interest linked to an encapsidation sequence, each encapsidation sequence being recognised by a binding domain introduced into the protein derived from the Gag polyprotein and/or into the integrase.

Abstract: The present invention relates to a retroviral system for the transfer of non-viral RNA into target cells and more particularly a retroviral particle capable of delivering multiple RNAs. More particularly, it relates to retroviral particles comprising a protein derived from the Gag polyprotein an envelope protein, optionally an integrase and at least two encapsidated non-viral RNAs, the encapsidated non-viral RNAs each comprising an RNA sequence of interest linked to an encapsidation sequence, each encapsidation sequence being recognised by a binding domain introduced into the protein derived from the Gag polyprotein and/or into the integrase.

Abstract: The present invention relates to a retroviral particle comprising a protein derived from the Gag polyprotein, an envelope protein, optionally an integrase and at least two encapsidated non-viral RNAs, the encapsidated non-viral RNAs each comprising an RNA sequence of interest bound to an encapsidation sequence, each encapsidation sequence being recognized by a binding domain introduced into the protein derived from the Gag polyprotein and/or into the integrase, and at least one of said sequences of interest of the encapsidated non-viral RNAs comprises a part coding a nuclease.

Abstract: The present invention relates to a retroviral particle comprising a protein derived from the Gag polyprotein, an envelope protein, optionally an integrase and at least two encapsidated non-viral RNAs, the encapsidated non-viral RNAs each comprising an RNA sequence of interest bound to an encapsidation sequence, each encapsidation sequence being recognized by a binding domain introduced into the protein derived from the Gag polyprotein and/or into the integrase, and at least one of said sequences of interest of the encapsidated non-viral RNAs comprises a part coding a nuclease.

Abstract: The present invention relates to retroviral particle comprising a protein derived from the Gag polyprotein, an envelope protein, optionally an integrase and at least two encapsidated non-viral RNAs, the encapsidated non-viral RNAs each comprising an RNA sequence of interest bound to an encapsidation sequence, each encapsidation sequence being recognized by a binding domain introduced into the protein derived from the Gag polyprotein and/or into the integrase, and at least one of said sequences of interest of the encapsidated non-viral RNAs comprises a part coding at least one epitope and/or at least one molecular structure specifically recognizing an epitope.

Abstract: The present invention provides viral vector compositions of high titer and purity, as well as methods for production of said compositions. The methods of the invention incorporate multiple features, such as production of viral vector particles in serum free media and multiple harvesting steps following transduction of the producer cell which provides for enhanced production of said viral vectors. The viral vector compositions of the invention, by virtue of their high titer and purity, minimize the deleterious phenotypic changes that typically occur following transduction of target cells, such as loss of a sub-populations of transduced cells, and effects on proliferation, differentiation, reprogramming or functionality of transduced cells.

Abstract: The present invention relates to a retroviral system for the transfer of non-viral RNA into target cells and more particularly a retroviral particle capable of delivering multiple RNAs. More particularly, it relates to retroviral particles comprising a protein derived from the Gag polyprotein an envelope protein, optionally an integrase and at least two encapsidated non-viral RNAs, the encapsidated non-viral RNAs each comprising an RNA sequence of interest linked to an encapsidation sequence, each encapsidation sequence being recognised by a binding domain introduced into the protein derived from the Gag polyprotein and/or into the integrase.

Abstract: The present invention relates to methods and compositions for characterization of global cellular changes in response to introduction of viral vector compositions into target cells. It more particularly refers to a method for assessing the quality of a viral vector composition for a transgene transfer into target cells comprising measuring the expression level of at least one biomarker selected in the group consisting of CXCL2 and EREG and/or of at least one biomarker selected in the group consisting of ASPM, AURKB, CENPA, CENPF, CKS1B, E2F8, ERCC6L, FAM83D, KIFC1, MKI67, NEK2, NUSAP1, OIP5, PRC1, RRM2, SGOL1, SPC25, TOP2A and TTK.

Abstract: The present invention relates to methods and compositions for characterization of global cellular changes in response to introduction of viral vector compositions into target cells. It more particularly refers to a method for assessing the quality of a viral vector composition for a transgene transfer into target cells comprising measuring the expression level of at least one biomarker selected in the group consisting of CXCL2 and EREG and/or of at least one biomarker selected in the group consisting of ASPM, AURKB, CENPA, CENPF, CKS1B, E2F8, ERCC6L, FAM83D, KIFC1, MKI67, NEK2, NUSAP1, OIP5, PRC1, RRM2, SGOL1, SPC25, TOP2A and TTK.

Abstract: The present invention provides viral vector compositions of high titre and purity, as well as methods for production of said compositions. The methods of the invention incorporate multiple features, such as production of viral vector particles in serum free media and multiple harvesting steps following transduction of the producer cell which provides for enhanced production of said viral vectors. The viral vector compositions of the invention, by virtue of their high titre and purity, minimize the deleterious phenotypic changes that typically occur following transduction of target cells, such as loss of a sub-populations of transduced cells, and effects on proliferation, differentiation, reprogramming or functionality of transduced cells.