Dracocephalum kotschyi: Inhibition of critical enzyme relevant to type-2 diabetes, essential oil composition, bactericidal and anti-oxidant activity

Document Type : Research Paper

Authors

Department of Biology, Faculty of Sciences, University of Guilan, Rasht, Iran

10.22124/cjes.2023.6256

Abstract

Dracocephalum kotschyi, an endemic medicinal plant in Iran, has long been used in folk medicine to treat various disorders. This study aimed to determine the phytochemical composition and biological activities of various extracts of leaves and flowers of D. kotschyi. Different solvent extracts (aqueous solution of acetone, methanol, ethanol, and a mixture of acetone and methanol) of D. kotschyi were screened for anti-amylase activity, antioxidant potential, and antibacterial efficiency. Antioxidant effects were elucidated by the methods such as DPPH and FRAP. The inhibitory potential of the extracts against amylase, a key enzyme involved in diabetes, was investigated by the Bernfeld method. The total phenolic, flavonoid, and anthocyanin contents of these extracts were also calculated. Disc diffusion, MIC, and MBC methods were applied to analyze the antibacterial efficiency of the extracts. GC-MS analysis of the essential oil was performed. Additionally, the HPLC method was used for the identification and quantification of caffeic acid. Based on antioxidant assays, the acetonic extract showed the highest antioxidant ability, due to its highest total antioxidant content. Also, the acetonic extract strongly inhibited α-amylase activity. Various extracts of D. kotschyi displayed inhibitory effects against both Gram-positive and Gram-negative bacteria. Analyzing the essential oils of the leaves and flowers of D. kotschyi by GC-MS led to identifying 6 and 19 compounds, respectively. These results suggest that D. kotschyi can be considered a promising source of natural antioxidant, antimicrobial, and anti-amylase agents for managing oxidative damage, as well as pharmaceutical and food purposes.

Keywords

References

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Caspian Journal of Environmental Sciences
Volume 22, Issue 2
April 2024
Pages 289-303

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