Figure 1.

NAC effect on cell viabilities of sinuleptolide-treated oral cancer and normal cells.

Notes: (A) Cell viabilities of oral cancer cells. (B) Cell viabilities of oral normal cells. With or without 4 mM NAC pretreatment for 1 h, oral cancer cells (Ca9-22) or oral normal cells (HGF-1) were incubated with 3, 6, 12, and 24 µg/mL of sinuleptolide for 24 h. Cell viability was measured by the MTS assay. Data, mean ± SD (n=6). **P-value of <0.002 for the significance between data with or without NAC pretreatment.

Abbreviation: NAC, N-acetylcysteine.