GC-MS profiling, in vitro antioxidant and toxicity evaluation, and in silico pharmacokinetic and molecular docking prediction of the phytocompounds of Rungia repens (L.) Nees targeting SarA of Staphylococcus aureus
The results indicate that R. repens has abundant compounds with biological activity and offers a source for drug development and delivery strategies and offers a source for drug development and delivery strategies.
Abstract
The medicinal plant Rungia repens (L.) Nees (Acanthaceae) is commonly known as kodagasalai in Tamil. It is recognized for its antipyretic, diuretic, anti-inflammatory, and vermifunge properties. The present study is primarily focused on identifying the phytocompounds and evaluating the antioxidant activity and cytotoxicity of R. repens leaf extract. In silico molecular docking studies were performed for SarA, an anti-virulence target of Staphylococcus aureus, and pharmacokinetic prediction was carried out to identify a suitable compound for drug delivery. The total flavonoid (TFC), phenolic content (TPC), and antioxidant activity of the ethanol extract were found to be 65.31 ± 7.2 mg QUE/g, 202.40 ± 2.97 mg GAE/g, and 76.166% ± 0.15% radical-scavenging activity, respectively, with an IC50 value of 311.9 ± 1.27 μg/mL. The extract exhibited no toxic effects up to 250 μg/mL against L929 cell line. GC-MS analysis identified 19 phytoconstituents in the R. repens ethanol leaf extract. Antibacterial activity against S. aureus exhibited an inhibition zone of 14 ± 1.73 mm. Phthalic acid, butyl undecyl ester showed a binding energy of −10.0 kcal/mol against SarA of S. aureus. ADME prediction revealed suitable phytocompounds of R. repens for drug development. Overall, the results indicate that R. repens has abundant compounds with biological activity and offers a source for drug development and delivery strategies.
Allium schoenoprasum L. (Amaryllidaceae) is a widely distributed herb traditionally used for cardiovascular, respiratory, and urinary health, with recent studies highlighting its antioxidant, anti-inflammatory, anticancer, and antihypertensive activities. The present study aimed to evaluate the antioxidant, anti-inflammatory, and antidiabetic activities of methanolic and aqueous extracts of A. schoenoprasum L. using in vitro assays, alongside comprehensive in silico analyses to explore the molecular interactions and pharmacological potential of its phytochemicals. Phytochemical quantification revealed that the methanolic extract possessed the highest total phenolic (101.26 ± 9.07 mg GAE/g) and flavonoid contents (49.21 ± 4.11 mg QE/g), which correlated with pronounced antioxidant activity (IC₅₀ = 111.46 ± 1.99 µg/mL). The same extract also demonstrated notable anti-inflammatory potential (IC₅₀ = 114.57 ± 1.29 µg/mL). GC-MS profiling identified a diverse range of compounds, from which nine representative phytochemicals were selected for geometry optimization using density functional theory (DFT) at the B3LYP/6–31 + G (d, p) level. In vitro antidiabetic evaluation showed significant inhibitory activity against α-amylase (IC₅₀ = 65.05 µg/mL) and α-glucosidase (IC₅₀ = 79.46 µg/mL). Molecular docking analysis indicated that 9,12-octadecadienoic acid, methyl ester (C-1; −6.5 kcal/mol) and hexadecanamide (C-6; −6.3 kcal/mol) exhibited the highest binding affinities toward human pancreatic α-amylase (PDB ID: 4GQQ), suggesting a possible association with the observed biological activity, although no direct attribution can be made without compound isolation and validation. Molecular dynamics simulations using YASARA confirmed protein-ligand stability and conformational adaptability. Additionally, ADMET and PASS analyses suggested favorable pharmacokinetic profiles and diverse biological activities. Collectively, these findings provide a robust foundation for future in vivo studies and highlight A. schoenoprasum L. as a promising candidate for therapeutic development.
Tamanna Sultana, M. Uzzaman, Md Kawchar Ahmed Patwary et al.· Discover Chemistry· 0 citations
Hedychium coronarium
J. Koenig (Zingiberaceae) is a medicinal plant with diverse phytochemicals and biological activities. This study characterized the phytochemical profile of the methanolic extract of
H. coronarium
(MEHC) and evaluated its antibacterial, antifungal, and anticancer activities. Gas chromatography–mass spectrometry (GC–MS) analysis tentatively identified 15 compounds, dominated by (
Z
)-2-methoxycinnamaldehyde (69.18%), along with sesquiterpenoids such as
δ-
cadinene,
α-
copaene, and
α-
muurolene. MEHC exhibited high total phenolic content (125.17 ± 2.36 mg GAE/g extract) and moderate total flavonoid content (78.43 ± 3.25 mg QE/g extract). The extract showed dose-dependent cytotoxicity against MCF-7 and HepG2 cells, with IC
50
values of 112.65 ± 1.68 and 98.34 ± 0.58 µg/mL, respectively. Gene expression analysis suggested the involvement of apoptotic pathways, as evidenced by the upregulation of caspase-3, -8, -9, and Bax and the downregulation of Bcl-2 and Bcl-xL. MEHC also demonstrated notable antibacterial activity, particularly against Gram-negative bacteria (MIC: 6.25–25 µg/mL), and antifungal activity against
Candida
species, with the strongest effect against
Candida albicans
(MIC: 12.5 µg/mL). Overall, MEHC exhibited antimicrobial and cytotoxic activities and modulated the expression of apoptosis-related genes. However, these findings are limited to in vitro observations, and further studies involving bioactive compound isolation, mechanistic validation, and in vivo evaluation are required to confirm therapeutic applicability.
Ibrahim M. Aziz, M. Farrag, Noorah A. Alkubaisi et al.· Scientific Reports· 0 citations
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