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In this study, the therapeutic potential and phytochemical composition of ethanolic extract of  Cephalaria elazigensis  var . purpurea  (CE), an endemic species, were investigated. For this purpose, the antiproliferative effect of CE on the MCF-7 human breast cancer cell line was evaluated by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay, and its effectiveness on colony formation and cell migration was analyzed with clonogenic assay and wound healing assay, respectively. In addition, the cell death detection ELISA (CDDE) assay was conducted to determine the pro-apoptotic capacity of CE. The IC 50  value of the CE was determined as 324.2 ± 14.7 µg/mL. Furthermore, upon 1000 µg/mL CE treatment, there was 4.96-fold increase in the population of cells undergoing apoptosis compared to the untreated control cells. The antioxidant activity tests were performed by DPPH free radical, ABTS cation radical, ferric-ion reducing power (FRAP) and ferrous-ion chelating power (FCAP) assays. Antioxidant activity values for the DPPH, ABTS and FRAP assays were found to be 125.6 ± 6.3, 34.09 ± 0.1 and 123.4 ± 4.2 µmol TE/mg DE, respectively. We further determined the effect of CE ethanolic extract against acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE) enzymes. CE plays an effective inhibitory role in AChE and BuChE (AChE: IC 50 : 10.54 µg/mL, BuChE: IC 50 : 6.84 µg/mL) respectively. Further, molecular docking stuy was conducted to understand the nature of the all compound against AChE an BChE. It is revealed that α-Linolenic acid shows lowest binding energy (-7.90 kcal/mol) towards AChE, on the other side, Linoleic acid shows good binding affinity (-7.40 kcal/mol) for BChE. Communicated by Ramaswamy H. Sarma

In vitro anticancer, antioxidant and enzyme inhibitory potentials of endemic Cephalaria elazigensis var. purpurea with in silico studies