(A) Polyarginine competition assay; cells were pretreated
with
10 μM cisplatin, BBR3464, or TriplatinNC, followed by 1 μM
Tamra-R9 after 10 min. White arrows; localization of Tamra-R9 to nucleolar
region. Red arrows; nucleolar region (no R9 localization). A representative
of three independent experiments is shown. (B) (Top) Experimental
scheme for 32P-metabolic rRNA labeling and drug treatment
in HCT116 cells. (Bottom) Lanes 1–8 were treated with 0.78,
1.56, 3.13, 6.25, 12.5, 25, 50, and 100 μM TriplatinNC, respectively.
Lanes 9 and 10 are untreated control samples. A representative of
three independent experiments is shown.