Cytotoxicity determination of MEF cells after LMF.

<p>(A) Liposomal magnetofection particles (arrows) in MEF cells at 24 hr post-LMF with either one or two LMF procedures and with different DNA doses (o: 1.5 µg, h: 0.75 µg). (B and C) The colorimetric absorbance values and LDH release percentages for control MEF cells, the four LMF treatment groups (1LMF-o, 1LMF-h, 2LMF-o, and 2LMF-h) at 24 hr post-LMF, and triton X-100–exposed MEF cells.