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Highly efficient transfection of mammalian cells by electric field pulses

Application to large volumes of cell culture by using a flow system

Marie‐Pierre ROLS

Centre de Recherches de Biochimie et de Génétique Cellulaires du CNRS, Toulouse, France

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Denis COULET

Centre de Recherches de Biochimie et de Génétique Cellulaires du CNRS, Toulouse, France

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Justin TEISSIÉ

Corresponding Author

Centre de Recherches de Biochimie et de Génétique Cellulaires du CNRS, Toulouse, France

Correspondence to J. Teissié, Centre de Recherches de Biochimie et de Génétique Cellulaires du CNRS, 118 route de Narbonne, F‐31062 Toulouse cédex, France
Fax: + 33 61 33 5886.
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First published: May 1992
Cited by: 34

Abstract

We have transfected mammalian cells with plasmid DNA by application of electric pulses. Chinese hamster ovary cells were chosen as a model in order to study and to optimize the transfection protocol. A plasmid carrying the gene coding for β‐galactosidase activity was used to determine transient expression of the electrotransferred acitivity at the cell level. Optimum transient expression for cells in suspension was obtained by application of 10 square wave pulses of 5‐ms duration and 0.6‐kV/cm intensity. Under the best conditions, transfection frequencies as high as 50–60% could be obtained and appeared to be highly dependent on the age of the cell culture. The method was applicable to plated cells growing in a petri dish or on microcarriers. The possibility of extension of the technique to large volumes of cells is presented. A flow system, composed of a peristaltic pump connected to the electropulser chamber, allowed large volumes of cells to be treated with flow rates in the order of several milliliters/minute. Transfection frequencies for the large volumes were 25% for cells in suspension and 35% for cells on microcarriers. These results open new perspectives in large‐scale transfection technology of cells however they are grown.

Number of times cited: 34

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