Figure 2
The HHV-8 K1-derived peptide S20-3 induces cell death in K1-positive and K1-negative hematological cancer cells but not in PBMCs from healthy donors. Indicated cell lines (1 × 106 cells/mL) were incubated with 100 μM peptide S20-3 or buffer for 1 hour. Cells were washed and incubated in complete medium for 24 hours before flow cytometry analysis. (A) HHV-8– and K1-positive cell lines KS-1, BC-3, BCBL-1; (B) HHV-8 and K1-negative cell lines BJAB, Jurkat, Daudi; (C) Jurkat cells and PBMCs from healthy donors. Data in (A) and (B) are shown as the means ± SD of triplicate wells. Double asterisks indicate significant differences compared with control treatments; **P < 0.01. Panel (C) shows representative results of 2 experiments with samples analyzed in triplicates.