eng Oriental Scientific Publishing Company Biomedical and Pharmacology Journal 0974-6242 2021-09-30 14 3 1685 1693 10.13005/bpj/2270 40763 article Renuka Saravanan 1 Ravichandran Natesan 1 Sumathi C Samiappan 1 Sivakumar Ramalingam 1 Department of Chemistry and Biosciences, SASTRA University, Srinivasa Ramanujam Centre, Kumbakonam 612001, Tamil Nadu, India. The study evaluates the antioxidant, antibacterial and anticancer activities of different extracts of Menthapiperitaleaves against the MCF-7 cell line. The leaves of Menthapiperitawere extracted with aqueous, ethyl acetate, and chloroform. These extracts were subjected to qualitative phytochemical screening, antibacterial activity, cytotoxic activity, and AO/ErBr assay for cells' apoptotic effect against the MCF-7 cell line. Qualitative analysis of the leaves' different extracts revealed glycosides, alkaloids, flavonoids, terpenoids, tannin, and saponin. The antibacterial activity of the leaf extracts was examined against four different bacterial species (Bacillus cereus, Pseudomonasfluorescens, Aeromonas hydrophila, and Klebsiella pneumoniae). The aqueous extract exhibited a high level of antibacterial activity (18.66mm ±1.1 in Bacillus cereus).Free‑radicalscavenging activity of chloroform extractof M. piperita leaves was found to be more than aqueous and ethyl acetate extracts. Further, aqueous, ethyl acetate,and chloroform extracts exerted a cytotoxic effect with the IC₅₀value of 45±1.5μg/ml, 29±1.2μg/ml, and 24±1.0μg/ml, respectively.From this study, we have observed that chloroform extract showed a concentration-dependent apoptotic effect against MCF-7 cellsdetermined by AO/EtBr assay.The resultsfurther depicted that the selected traditionalMentha piperita could be used as a potential anticancer, antibacterial, and good antioxidant agent against the MCF-7 cell line. https://biomedpharmajournal.org/vol14no3/anti-oxidant-anti-bacterial-and-anti-cancer-activity-of-mentha-piperita-against-mcf-7-cells/ Anti-oxidant Anti-bacterial Anti-cancer  Mentha piperita MCF-7