Table 2.

Reversal of resistance to taxol in CCRF-CEM/VBL₁₀₀ cells by NAA

Treatment	CCRF-CEM	CCRF-CEM/VBL100, IC50 in μ	Ratio
Taxol only	0.0011 (A)	1.51 (C)	(C)/(A) = 1372†
	±0.0015	±0.30
Taxol with	0.00048 (B)	0.0018 (D)	(D)/(B) = 3.8†
10 μm NAA	±0.000004	±0.0001
Ratio	(A)/(B) = 2.3*	(C)/(D) = 839*

The IC₅₀ values for taxol were determined with the median-effect plots using a computer (23, 24). The taxol was varied at 6-7 concentrations. Mean ± 95% confidence intervals are shown. 

^*Fold of enhancement of taxol effect by 10 μM of NAA. 

^†Fold of resistance to taxol in CCRF-CEM/VBL₁₀₀ cells.