Saber Samadiafshar; Somayeh Farahmand; Ali Nikakhtar; nadia Garmsiri; Farnia Garmsiri; Sahel Samadiafshar; Roghayeh Azizi
Abstract
Urinary tract infections represent a global health challenge increasingly complicated by antimicrobial resistance. This study explores the therapeutic potential of Stachys schtschegleevii essential oil against common uropathogens. Gas chromatographic-Mass Spectrometry analysis revealed four principal ...
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Urinary tract infections represent a global health challenge increasingly complicated by antimicrobial resistance. This study explores the therapeutic potential of Stachys schtschegleevii essential oil against common uropathogens. Gas chromatographic-Mass Spectrometry analysis revealed four principal bioactive compounds (α-Pinene, β-Pinene, Linalool, and Hexadecanoic Acid) exhibiting remarkable synergistic antimicrobial activity. Molecular docking simulations demonstrated exceptional binding affinities between these phytocompounds and bacterial dihydrofolate reductase enzymes, with α-Pinene and β-Pinene forming strongest complexes with Enterococcus faecalis DHFR (-6.1 kcal/mol) and Hexadecanoic Acid with Staphylococcus aureus DHFR (-6.1 kcal/mol). In vitro evaluation confirmed significant antimicrobial efficacy, with substantial inhibition zones (E. faecalis 20.16±0.2mm, E. coli 17.7±0.45mm, S. aureus 20.53±1.47mm) and impressive minimum inhibitory concentrations (E. faecalis 6.25mg/ml, E. coli 1.56mg/ml, S. aureus 3.12mg/ml). The multi-component nature of these extracts creates a complementary mechanism of action whereby multiple compounds simultaneously target different bacterial pathways, significantly reducing resistance development probability compared to single-compound therapeutics. This synergistic interaction, coupled with the plant's documented anti-inflammatory properties, presents schtschegleevii as an exceptional candidate for developing novel phytotherapeutic approaches against increasingly resistant uropathogens, offering an optimal balance of therapeutic efficacy, economic viability, and patient safety in urinary tract infection management.
Soghra Fathalipour; Sima Pourbeyram; Sanaz Lotfi; Rasul Bulgar
Abstract
Silver nanoparticles (Ag NPs)-reduced graphene oxide was prepared through the in situ nucleation of Ag NPs on reduced, modified GO (rMGO). Glycine was used as a green reducing as well as modifier agent for GO to obtain rMGO. Nucleation of Ag NPs on rMGO was carried out at 80 ◦C at aqueous media. UV-Vis, ...
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Silver nanoparticles (Ag NPs)-reduced graphene oxide was prepared through the in situ nucleation of Ag NPs on reduced, modified GO (rMGO). Glycine was used as a green reducing as well as modifier agent for GO to obtain rMGO. Nucleation of Ag NPs on rMGO was carried out at 80 ◦C at aqueous media. UV-Vis, FT-IR, and XRD techniques confirmed the reduction, modification, and synthesis of Ag NPs. Meanwhile, the morphology of rMGO and rMGO-Ag nanocomposite was investigated with SEM and TEM images. The synthesized nanocomposite showed excellent catalytic behavior for the reduction of 4-nitrophenol (4-NP) by NaBH4. The electrocatalytic behavior of Ag NPs on rMGO for electroreduction of H2O2 was investigated by cyclic voltammetry (CV). In the optimum condition, H2O2 was determined with a detection limit of 9.4 µM and sensitivity of 0.52 µAµM-1. In addition, with the investigation of MIC data of nanocomposite, it was distinguished that this compound has excellent antibacterial activity.
