| 摘要 |
<p>AbstractThe present invention relates to a complementation SV40 packaging cell line for in-trans complementation of viral T-antigen (T-Ag). This cell line eliminates the generation of viable virus carrying the T-Ag gene, by reducing homologous recombination in packaging process of an SV40 vector, wherein said cell line is transformed with at least one expression cassette having minimal sequence identity to SV40 sequences comprised within said SV40 viral vector. The expression cassette of the invention comprises nucleic acid encoding SV40 T-Ag under the control of a heterologous promoter, heterologous termination signal; and optionally additional operably linked control elements and/or selectable markers. The invention further relates to methods for the preparation of packaging cell line, processes for production of a safe preparation of SV40 viral vectors and compositions comprising the same.</p> |
