Figure 2. Cellular apoptosis is induced after combination treatment.
(A) Patient leukemic NK cells from 6 patients were treated with 12.5 µM C6-Ceramide and 5, 10, or 15 µM PPMP for 24 hrs then stained for 7AAD//7-AAD then assayed for apoptosis by flow cytometry. (B) RNK-16 cells were treated with 6.25 µM C6-Ceramide nanoliposomes and 5, 10, or 15 µM of PPMP (n=3 independent experiments), then apoptosis assay was performed. (C) NKL were treated with 12.5 µM C6-Ceramide and 5, 10, or 15 µM PPMP (n=3 independent experiments), then apoptosis assay was performed. (D) Normal PBMCs were treated with 12.5 µM C6-Ceramide nanoliposomes and 5, 10, or 15 µM PPMP (n=8), then apoptosis assay was performed. *, P<0.05, **, P<0.005, ***, P<0.0005 indicate significant differences of C6-Ceramide nanoliposomes+PPMP versus control treated cells (Student’s t-test).


