Table 2.

IC₅₀ values (μg/mL) of PPSP, PPCP, and free PTX against MCF-7 and HepG2 cells after treatment for 24 and 48 h.

	MCF-7		HepG2
	24 h	48 h	24 h	48 h
PTX	42.4	1.8	5,717.9	891.3
PPCP	24.6	1.1	1,942.3	713.5
PPSP	3.7	0.2	166.3	27.9
Ratioa (%)	8.8	11.1	2.9	3.1
Ratiob (%)	15.0	18.2	8.6	3.9

^aPercentage of PPSP micelle to free PTX,

^bPercentage of PPSP micelle to PPCP.