摘要:
Expression vectors ideal for use in vaccinating individuals against disease based on vaccinia virus and other chordopoxviruses having high expression of recombinant genes and low expression of vector genes in target animals, and low expression of recombinant genes and high expression of vector genes in cells used for propagation.
摘要:
The present invention provides a method for recovering an essentially cell-associated expression product from a host cell comprising (a) culturing said host cell under conditions that allow expression of said expression product; (b) collecting said host cell in/on a filter unit; (c) disrupting said host cell in/on the filter unit; and (d) separating said expression product from said disrupted host cell. Said host cell is preferably a vertebrate cell, more preferably an avian cell, which is preferably cultured in suspension. Furthermore, the present invention provides for the use of a filter unit characterized in that said filter unit is (i) suitable to retain a host cell which expresses an expression product; and (ii) suitable for elution of said expression product from the filter unit after cell disruption in/on said filter unit for recovering said expression product from said host cell as well as for a system for recovering an expression product from a host cell comprising said filter unit. The present invention also provides an expression product obtainable by said method, said expression product being preferably a virus, specifically a poxvirus, in particular selected from the group consisting of fowlpoxvirus, vaccinia virus and, more preferably, modified vaccinia virus Ankara, MVA.
摘要:
The present application relates to a method of stabilising a virus selected from modified vaccinia Ankara (MVA) virus or E1/E3-deleted human adenovirus serotype 5 (AdHu5), wherein said virus retains activity after storage, the method comprising: (a) forming a liquid mixture of the virus with a glass-forming excipient which comprises trehalose and sucrose; (b) applying said liquid mixture to a support; and (c) drying said liquid mixture at a temperature that does not exceed 35°C and does not fall below 1°C to form a glass containing the virus, wherein said virus retains activity after storage in the glass at 45°C for at least 4 months, and wherein said virus expresses an antigen selected from a malarial antigen, an influenza antigen, a tuberculosis antigen and/or an HIV antigen.
摘要:
The invention relates to vectors comprising two or more homologous nucleotide sequences and methods for generating them. The invention concerns substituting bases in the homologous nucleotide sequences with different bases that do not alter the encoded amino acid sequence. The invention allows for the reduction of intramolecular recombination between homologous nucleotide sequences, in particular in mammalian cells. The invention further relates to nucleotide sequences containing substituted bases.
摘要:
The present invention relates to a method for the cultivation of primary cells. The primary cells are cultivated in a serum free medium comprising a factor selected from the group consisting of growth factors and attachment factors. The method for the cultivation of primary cells may be one step in a method for the amplification of viruses, such as poxviruses. According to this latter method the primary cells are cultivated in a serum free medium comprising a factor selected from the group consisting of growth factors and attachment factors. The cells are then infected with the virus and the infected cells are cultivated in serum free medium until progeny virus is produced.
摘要:
The invention relates to use of fluorescence activated cell sorting in the production of recombinant poxvirus, in particular to the use of fluorescence activated cell sorting in the separation of cells containing recombinant poxvirus from cells not containing recombinant poxvirus.
摘要:
Provided are compounds that enhance the efficacy of viruses by increasing spread of the virus in cells, increasing the titer of virus in cells, or increasing the antigen expression from a virus, gene or trans-gene expression from a virus, or virus protein expression in cells. Other uses, compositions and methods of using same are also provided.
摘要:
It is desirable to produce live vaccines, which are highly attenuated and which do only contain minimal or no animal-derived components. The production of highly attenuated live viruses can be better achieved when using specifically designed cell lines as producer substrate as opposed to using less defined primary cells. However, live viruses, thus produced comprise undesirable components from the cell lines and cell culture. The present invention relates to methods of production and purification of live enveloped viruses, which are suitable for vaccination.
摘要:
The present invention relates to a method for production of continuous cell lines comprising providing living cells of an animal or a human, irradiating said cells with UV light, proliferating said cells and selecting multiplying cells as cells of a continuous cell line.