Search

The Lamiaceae family are utilized as ornamental, medicinal, and food supplements throughout the world. The current study focuses on a comparative analysis of the phenolic compositions and bioactivities (including antioxidant, anticholinergic, and antibacterial activities) of ethanolic extracts derived from the aerial parts of the two species (Lavandula stoechas L. and Thymus sipyleus Boiss). The presence of phenolic compounds and phytochemicals in the plant extracts was identified using the LC-MS/MS technique. The LC-MS/MS analysis revealed that vanillic acid (125,596.66 µg/L) was the most abundant phytochemical in L. stoechas. Kaempferol (8550.52 µg/L) was the most abundant substance in Thymus sipyleus. The assessment of the antioxidant efficacy of the species extracts was conducted using the DPPH (2.2-diphenyl-1-picryl-hydrazyl-hydrate), ABTS (2.2′-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid)), Fe3+–Fe2+ reducing, and CUPRAC (Cu2+–Cu+ reducing) assays. The anticholinergic activity of the samples was determined using the acetylcholinesterase (AChE) inhibition assay. The results of antioxidant activity were higher in the T. sipyleus than in the L. stoechas ethanol extracts. The extracts of L. stoechas exhibited radical scavenging activity ranging from 15 to 18%, while T. sipyleus had activity effects ranging from 34% to 38%. The AChE inhibition potential for L. stoechas and T. sipyleus extracts as IC50 values were 0.221 ± 0.01 mg/mL and 0.067 ± 0.02 mg/mL, respectively. The antibacterial effects of the ethanolic extracts of these species against pathogenic bacteria isolates were determined using the MIC (minimal inhibitory concentration) method. These findings indicated that the extracts from L. stoechas and T. sipyleus possess the potential to be natural antioxidants in the realm of food preservation. Additionally, their antioxidant, anticholinergic, and antimicrobial properties suggest potential therapeutic utility in the management of certain diseases. [ABSTRACT FROM AUTHOR]

Epilobium angustifolium is widely used in medicine for disease treatments, as well as in the cosmetic and food industries. The aim of this research was to investigate the antioxidant, and anticholinergic properties, phenolics profile and antibacterial activities of the E. angustifolium ethanol extract. The analysis of phenolic compounds was performed with LC–MS/MS. The antioxidant capacity (radical scavenging, metal-reducing power and total antioxidant activity) was assessed by DPPH, ABTS, Cu2+–Cu+ reducing (CUPRAC), Fe3+–Fe2+ reducing and ferric thiocyanate methods. The antibacterial activity was determined by disc diffusion and MIC (Minimum inhibitory concentration) methods and the anticholinergic property was predicted by inhibition of acetylcholinesterase (AChE). The major phenolic compounds, founding in the plant extract were luteolin, fumaric acid, vanillic acid, and caffeic acid. The ethanol extract of the plant showed DPPH free radical scavenging value of 11.3%, while the ABTS radical scavenging activity was 19.4% and showed moderately metal-reducing power. Also, the extract had 39.3% inhibition on lipid peroxidation of linoleic acid emulsion and showed an inhibition effect on the AChE with IC50 values (0.14 mg mL−1). The ethanol extract of the plant showed antibacterial effect on Staphylococcus aureus, Escherichia coli, and Salmonella Typhimurium at different levels. These results suggested that E. angustifolium extract might be a suitable natural antioxidant in the preservation of foods by preventing the oxidation of polyunsaturated fatty acids, and might play a role in the treatment of some diseases with its antioxidant, anticholinergic, and antibacterial activity. [ABSTRACT FROM AUTHOR]