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We present a simple and robust method to evaluate the transfection efficiency of commercially available transfection reagents intended to be established for use in nonmammalian cell lines. To illustrate the method, we compare the ability of four different reagents to transfect the embryonic zebrafish cell line Z3. Z3 cells were seeded in a 96-well plate and simultaneously transfected in several variations by using minimum volumes of transfection reagent and a vector DNA encoding an amplified version of green fluorescent protein (GFP). After 24 and 48 h, transfection efficiency was determined by a dual fluorescence plate reader measurement of GFP and Hoechst 33342 fluorescence, an indicator of cell density. Of the four different reagents tested, certain variations of JetPrime(™) reagent and X-tremeGene(™) HP reagent produced the highest fluorescence signal per cell after 24- and 48-h incubation, respectively. The simultaneous multivariate setup enables comparing different reagent/DNA combinations at different time points well, independent of cell growth variability or seeding density.

A Method to Evaluate the Efficiency of Transfection Reagents in an Adherent Zebrafish Cell Line