Table 1.

The amounts of compounds used for transfections in a serum-free medium (Opti-MEM) and associated cytotoxicity.

siRNA (µg)	CPP-GNP (µg)	CPP, Max. (µg/µM)	CPP Cytotoxicity (24 h)	CPP Cytotoxicity (48 h)
0.1	4	1.3/4.4	Non-cytotoxic	Non-cytotoxic
0.3	12	3.8/13	Non-cytotoxic	12–24%
0.7	28	9/31	50%	n/d *
1.0	40	12.8/44	90%	11–29%
0	0	28/95	n/d *	55–88%
0	0	45/153	n/d *	98%

* n/d stands for “not determined”.