Figure 2

I3C induces cell-cycle arrest in HTLV-1-infected T-cell lines. HTLV-1-infected T-cell lines were incubated in the absence or presence of I3C (100 μM) for 12 h and then stained with propidium iodide, and analyzed for DNA content by flow cytometry. Three independent experiments per cell line were performed and results are presented as the mean percentage ± SD. *P < 0.05, compared with control.