An early replacement SV40 vector efficiently transduces exogenous DNA into mammalian cells, particularly monkey kidney cells, with significantly higher efficiency than the calcium phosphate precipitation method.
SV40 vector boosts in vitro transduction efficiency; leaves open in vivo efficacy and safety for gene therapy.
An early replacement SV40 vector, SV40-Mu beta, was constructed by replacing part of the early genes of the virus with mouse interferon-beta (IFN-beta) cDNA. Upon transfection of COS-7 cells with this DNA, transducing viral particles were produced, which could infect various cells and cause efficient production of mouse IFN-beta. The viral stock contained no detectable wild-type SV40. The IFN production after the virus infection was very high in monkey kidney cells, but less so in human epithelial cells, and low in mouse, pig, hamster cells and in human lymphocytes. The efficiency of introduction of the DNA to monkey kidney cells was compared with that by the calcium phosphate precipitation method, and the viral vector was found to be more efficient by a factor of several tens to hundreds.
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Asano et al. (1985) studied this question.
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