Table 1. Bioassay data regarding the cytotoxicity of Kigelia pinnata stem bark methanolic extract in a panel of human tumor cell lines. The equieffective IC₅₀ concentrations were calculated from the experimental bioassay data using non-linear regression analysis (GraphPad Prizm software).

Treatment	IC50 (µg/ml)
	SKW-3a	Rehb	HL-60c	K-562 d	DOHH-2e	HD-MY-Zf	MCF-7g	LLh
TME	15.1 ± 3.4	126.0 ± 9.1	90.7 ± 4.7	186.0 ± 9.2	101.0 ± 7.4	124.1 ± 8.9	11.8 ± 3.8	10.2 ± 2.7
CF3	148.1 ± 7.5	n.d.	n.d.	n.d.	n.d.	n.d.	n.d.	n.d.
CF7	150.6 ± 3.4	n.d.	n.d.	n.d.	n.d.	n.d.	n.d.	n.d.
Vincristine*	0.22 ± 0.1	3.3 ± 0.9	1.5 ± 0.7	4.1 ± 1.4	1.2 ± 0.6	7.4 ± 1.0	3.7 ± 0.6	2.2 ± 0.4

^aT-cell leukemia (a KE-37 derivative), ^bacute lymphoid leukemia, ^cacute myeloid leukemia, ^dchronic myeloid leukemia, ^enon-Hodgkin lymphoma, ^fHodgkin lymphoma, ^gbreast cancer; ^hLewis lung cell line – murine lung cancer; *positive control.