Synergistic Antitumor Effect of Genitinib (Iressa®) with Flavonoids from the Scutellaria baicalensis Root on the Non-Small Cell Lung Cells

Fig. (2) IC₅₀ isobolograms of gefitinib and Wogon flavonoid against A549 cells. The IC₅₀ value of gefitinib alone is expressed as 1.0 on the Y-axis of the isobologram, while that of Wogon flavonoid (wogonin, oroxylin A, galangin, chrysin or sculcap flavone II) alone is expressed as 1.0 on the X-axis.