Table 1.

IC₅₀ values of paclitaxel in human cancer cell lines (ng/mL). Cancer cells were treated with various concentrations of paclitaxel alone (Control) or in the presence of 10 μg/mL of ETA for 48 h. Cell viability was measured by CCK-8 assay. Data were expressed as Mean ± SD of three independent experiments. * p < 0.05 and ** p < 0.01 compared to control.

Treatment	Tumor Cell Lines
	K562	HeLa	HepG2	KB-3-1
Paclitaxel alone (Control)	4.8 ± 0.4	17.1 ± 4.1	67.2 ± 12.3	8.1 ± 1.3
Paclitaxel + 10 μg/mL ETA	3.8 ± 0.6	8.3 ± 1.0 *	14.1 ± 8.5 **	5.1 ± 0.6 *