Figure 2
From: Evaluation of bioactive sphingolipids in 4-HPR-resistant leukemia cells
Effect of selected insults on the viability of 4-HPR-sensitive and resistant leukemia cell lines. 4-HPR-sensitive (CCRF-CEM) and derived resistant cell lines (R0.5 and R10) were exposed to several drugs or UV radiation, and cytotoxicity tested after 48 h by the XTT assay. Data are average ± SD of three independent experiments performed in quadruplicates (n = 12); *P < 0.05, **P < 0.01; ANOVA plus Tamhane post-hoc test.