This study aims to assess the phytochemical composition, antioxidant potential, and antidiabetic properties of Erigeron annuus (L.) Pers. The ethyl acetate fraction of Erigeron annuus leaves exhibited the highest extraction rate (22.42%). The preliminary qualitative phytochemical analysis in crude extract and fractions is often performed using chemical tests. For quantitative analysis, spectrophotometric methods are widely used to estimate the concentration of phytochemicals. The antioxidant properties were evaluated using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging assay and the ferric reducing antioxidant power (FRAP) assay, which measures the reduction of Fe3+ to Fe2+. Qualitative screening revealed the presence of tannins, flavonoids, phenols, saponins, and alkaloids. Notably, the ethyl acetate fraction showed significantly (p < 0.05) higher total phenolic content (70.01 ± 1.1 mg/g) and total flavonoid content (80.29 ± 1.03 mg/g). This fraction also demonstrated substantial α-amylase inhibitory activity and antioxidant potential, suggesting the ability of polyphenols to reduce α-amylase activity. The α-amylase inhibition (23.15 ± 1.22% to 67.31 ± 2.01%) activity and IC50 value (40.59 ± 0.03 μg/mL) were notably higher in the ethyl acetate fraction compared with the standard drug metformin (19.88 ± 1.51 μg/mL). Erigeron annuus ethyl acetate fraction exhibited significantly higher glucose levels (10.88% ± 1.29% to 65.11 ± 0.94%) and conducted a lipid peroxidation experiment utilizing egg yolk as the source of lipids with high content. The most bioactive fraction was evaluated for cytotoxicity against the HEK293 cell line. The cytotoxicity assay revealed that 50% cell viability was observed at a concentration of 50 μg/mL, indicating that the plant extract is nontoxic at concentrations below this threshold. Furthermore, the dominant fraction was further investigated using liquid chromatography-mass spectroscopy and high-performance thin-layer chromatography techniques from the selected plant. Moreover, an in vivo study will be performed to evaluate the antidiabetic efficacy of Erigeron annuus, isolate and characterize its bioactive components, and examine its molecular mechanism of action to improve its therapeutic applicability.

Centre for Advance Innovation Technologies VSB Technical University of Ostrava Ostrava Czech Republic

Department of Biomedical Science Institute of Health Jimma University Jimma Oromia Region Ethiopia

Department of Chemistry Faculty of Science University of Hradec Kralove Hradec Kralove Czech Republic

Division of Research and Development Lovely Professional University Phagwara Punjab India

Petroleum and Chemical Engineering Department Faculty of Engineering Universiti Teknologi Brunei Bandar Seri Begawan Brunei Darussalam

School of Bioengineering and Food Technology Shoolini University of Biotechnology and Management Sciences Solan India

School of Biological and Environmental Sciences Shoolini University of Biotechnology and Management Sciences Solan India

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