Accumulation of Pt (ng/10⁶ cells) in cancer cells after exposure to complexes 1 or Pt-Fe (10 μM, 1 h, in the dark)^a.

Complex	Platinum accumulation (ng/106 cells)
	A2780	A549	PC3	T24
Pt-Fe	3.4 ± 0.6**	4.9 ± 1.0*	6.7 ± 1.8*	3.8 ± 0.4***
1	1.19 ± 0.04***	1.2 ± 0.4*	1.3 ± 0.5*	n.d.

^aAll data were determined from triplicate samples and compared with values obtained for untreated cells using a two-tail t-test with unequal variances. *p < 0.05, **p < 0.01, ***p < 0.005.