Phytochemical, Cytotoxic, and Antimicrobial Evaluation of Tribulus terrestris L., Typha domingensis Pers., and Ricinus communis L.: Scientific Evidences for Folkloric Uses

Table 3

Selectivity of the three extracts against MRC5 normal cells.

Extract	IC50	SI
	MRC5	MCF7	A2780	HT29
Tribulus terrestris L.	13.31 ± 0.98	0.90	3.61	0.41
Typha domingensis Pers.	13.11 ± 1.08	0.62	2.23	1.79
Ricinus communis L.	18.09 ± 0.57	11.90	5.95	4.58

SI: selectivity index = IC₅₀ value of extract against normal MRC5 cells/IC₅₀ value of the same extract against either MCF7, A2780, or HT29 cells.