Polyphenol-capped biogenic synthesis of noble metallic silver nanoparticles for antifungal activity against candida auris

Malik, Maqsood Ahmad and Batterjee, Maha G. and Kamli, Majid Rasool and Alzahrani, Khalid Ahmed and Danish, Ekram Y. and Nabi, Arshid (2022) Polyphenol-capped biogenic synthesis of noble metallic silver nanoparticles for antifungal activity against candida auris. Journal of Fungi, 8 (6). ISSN 2309-608X, DOI https://doi.org/10.3390/jof8060639.

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In terms of reduced toxicity, the biologically inspired green synthesis of nanoparticles has emerged as a promising alternative to chemically fabricated nanoparticles. The use of a highly stable, biocompatible, and environmentally friendly aqueous extract of Cynara cardunculus as a reducing and capping agent in this study demonstrated the possibility of green manufacturing of silver nanoparticles (CC-AgNPs). UV-visible spectroscopy validated the development of CC-AgNPs, indicating the surface plasmon resonance (SPR) lambda(max) band at 438 nm. The band gap of CC-AgNPs was found to be 2.26 eV. SEM and TEM analysis examined the surface morphology of CC-AgNPs, and micrographs revealed that the nanoparticles were spherical. The crystallinity, crystallite size, and phase purity of as-prepared nanoparticles were confirmed using XRD analysis, and it was confirmed that the CC-AgNPs were a face-centered cubic (fcc) crystalline-structured material. Furthermore, the role of active functional groups involved in the reduction and surface capping of CC-AgNPs was revealed using the Fourier transform infrared (FTIR) spectroscopic technique. CC-AgNPs were mostly spherical and monodispersed, with an average size of 26.89 nm, and were shown to be stable for a longer period without any noticeable change at room temperature. Further, we checked the antifungal mechanism of CC-AgNPs against C. auris MRL6057. The minimum inhibitory concentrations (MIC) and minimum fungicidal concentrations (MFC) were 50.0 mu g/mL and 100.0 mu g/mL respectively. The cell count and viability assay confirmed the fungicidal potential of CC-AgNPs. Further, the analysis showed that CC-AgNPs could induce apoptosis and G2/M phase cell cycle arrest in C. auris MRL6057. Our results also suggest that the CC-AgNPs were responsible for the induction of mitochondrial toxicity. TUNEL assay results revealed that higher concentrations of CC-AgNPs could cause DNA fragmentation. Therefore, the present study suggested that CC-AgNPs hold the capacity for antifungal drug development against C. auris infections.

Item Type: Article
Funders: Institutional Fund Projects - Ministry of Education and King Abdulaziz University, Deanship of Scientific Research (DSR), Jeddah, Saudi Arabia [Grant No:IFPHI136-130-2021]
Uncontrolled Keywords: Green synthesis; Polyphenols; Cell cycle; Candida auris
Subjects: Q Science > QR Microbiology
Divisions: Faculty of Science > Department of Chemistry
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 17 Oct 2023 01:22
Last Modified: 17 Oct 2023 01:22
URI: http://eprints.um.edu.my/id/eprint/41958

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