Chromatographic Profile and Antioxidant and Enzyme Inhibitory Activity of Sideritis Leptoclada: an Endemic Plant from Turkey

Sideritis species have been used for centuries for their antimicrobial, digestive, anti-ulcerogenic and anti-inflammatory properties. Therefore, in this study, it was aimed to evaluate the chemical composition, antioxidant and enzyme inhibitory activities of solvent extracts of S. leptoclada O. Schwarz & P.H. Davis, an endemic species. It was determined that methanol (MeOH) and water extracts contained high amounts of chlorogenic acid and verbascoside, while the ethyl acetate (EtOAc) extract contained high amounts of 4-hydroxybenzoic and vanilic acids. The water extract showed the highest antioxidant activity in almost all parameters. Inhibitory activity of the MeOH extract on tyrosinase was 1.04 mg/ml, which was the highest value in this experiment. On the other hand, in alpha-amylase inhibitory assay, the EtOAc extract showed an activity of 2.21 mg/ml. Docking analysis showed that verbascoside can be an effective tyrosinase and alpha-amylase inhibitory agent. (C) 2021 SAAB. Published by Elsevier B.V. All rights reserved.