Table 1.

The cell growth and EGFR TK activities inhibition of U87 cell lines by gefitinib

Cell lines	IC50(μM)
A431	0.31 ± 0.09
U87MG.⧍EGFR	15.3 ± 0.3
U87MG.DK	16.7 ± 1.9
U87MG.wtEGFR	26.7 ± 1.3
U87MG	14.2 ± 1.6

Cells were measured after a 72 hr incubation of gefitinib, assays for all cell lines were performed in triplicate