Upregulated RNF44 and downregulated AMPK-α1 sensitize BR xenograft tumors
to ADI-PEG20 treatment. (A) (B) Corresponding to our previous study (Li, et al.,
2006), ADI-PEG20 significantly reduced BR tumor sizes by inducing cell
apoptosis. Female nude mice were inoculated subcutaneously with 1 ×
106 melanoma cells. When tumor volume reached 100 mm3,
tumor bearing mice received treatment of ADI-PEG20 (100 IU/kg) twice per week.
On day 32, single-cell suspensions were prepared from tumor tissues and then
were labeled with Annexin V and then analyzed by FACS. (C) (D) AMPK-α1
and RNF44 expressions were detected by IHC staining and the data were presented
as H-scores (scale bar = 100 μm) (n = 5, *p <
0.05, **p < 0.01, and ***p <
0.005).