Polyphenol Contents, Potential Antioxidant, Anticholinergic and Antidiabetic Properties of Mountain Mint (Cyclotrichium leucotrichum)

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Abstract In the present work, antioxidant and antidiabetic potentials of mountain mint [Cyclotrichium leu‐cotrichum(Stapf ex Rech. Fil.) Leblebici] was the first time appraised. In this sense, methanol (MECL) and water (WECL) extracts were obtained from aerial parts of mountain mint (Cyclotrichium leucotrichum) and studied for their antioxidant ability by several bioanalytical assays. Also, their inhibition profiles were realized toward several metabolic enzymes connected to some diseases, including butyrylcholinesterase (BChE), α‐glycosidase, acetylcholinesterase (AChE), and α‐amylase enzymes. Additionally, their phenolic contents were determined by putative chromatographic method of LC/MS/MS. Consequently, nineteen phenolic molecules were identified in MECL and fifteen phenolic molecules were found in WECL. Also, antioxidant effects of both extracts were studied using by the methods of 1,1‐diphenyl‐2‐picryl‐hydrazyl (DPPH⋅), 2,2'‐azinobis(3‐ethylbenzthiazoline‐6‐sulfonic acid) (ABTS.+) and N,N‐dimethyl‐p‐phenylenediamine (DMPD.+) scavenging activities, ferric (Fe3+) and cupric (Cu2+) ions and Fe3+‐2,4,6‐tri(2‐pyridyl)‐s‐triazine (TPTZ) reducing capacities. MECL and WECL were found as powerful DPPH⋅ (IC50: 23.74 and 28.85 μg/mL), ABTS.+(IC50: 12.53 and 14.05 μg/mL) and DMPD.+scavenging effects (IC50: 43.52 and 54.80 μg/mL). Also, both extracts demonstrated the effective inhibition on AChE (IC50: 69.31 and 115.51 μg/mL), BChE (IC50: 57.75 and 86.62 μg/mL), α‐glycosidase (IC50: 36.47 and 62.94 μg/mL) and α‐amylase (IC50: 1.01 and 3.43 μg/mL). This study will be useful for future studies to determine the antioxidant properties and enzyme inhibition profile of food, medical and industrially important plants.