“…Cyperus rotundus L. is known to have cytotoxic effects on some cancer cells, such as leukemia cells K562 and L1210 [4], lymphoma cells of L5178 mice [5], HeLa cells and SiHa cells in cervical cancer [6], Ehrlich's ascites carcinoma breast cancer [7], and KB oral cancer [8].The essential oil potent cytotoxic activities against colon (HCT-116), hepatocellular (Hep G-2) and breast (MCF-7) human cancer cell lines with IC 50 of 1.06, 1.17 and 2.22 μg/mL, respectively [3]. Therefore this study is to prove whether the rhizome of Cyperus roundus L.fractionated with nhexane has the potential as a breast anticancer performed by cytotoxic testing, selectivity index (IS), induction apoptosis in MCF-7 cells.…”