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  • Title: Green and rapid synthesis of silver nanoparticles using Borago officinalis leaf extract: anticancer and antibacterial activities.
    Author: Singh H, Du J, Yi TH.
    Journal: Artif Cells Nanomed Biotechnol; 2017 Nov; 45(7):1310-1316. PubMed ID: 27598388.
    Abstract:
    This study highlights the facile, reliable, cost effective, and ecofriendly synthesis of silver nanoparticles (AgNPs) using Borago officinalis leaves extract efficiently. The biosynthesis of AgNPs was verified by UV-Vis spectrum which showed the surface plasmon resonance (SPR) band at 422 nm. Transmission electron microscope (TEM) analysis revealed that the particles were spherical, hexagonal, and irregular in shape and had size ranging from 30 to 80 nm. The energy dispersive X-ray spectroscopy (EDX) and elemental mapping have displayed the purity and maximum distribution of silver in the AgNPs. The crystalline nature of AgNPs had been identified using X-ray diffraction (XRD) and selected area diffraction pattern (SAED). The particle size analysis revealed that the Z-average diameter of the AgNPs was 50.86 nm with polydispersity index (PDI) 0.136. Zeta potential analysis displayed the colloidal stability of AgNPs. This work also showed the efficacy of AgNPs against lung cancer cell lines (A549) and cervical cancer cell line (HeLa), in vitro. The AgNPs showed cytotoxicity to the A549 and HeLa cancer cell line at the concentrations 5 and 2 μg/ml. The AgNPs were also explored for the antibacterial activity including biofilm inhibition against pathogenic bacteria. The B. officinalis leaves extract can be used efficiently for green synthesis AgNPs. The biosynthesized AgNPs demonstrated potentials as anticancer and antibacterial agents. This work provides helpful insight into the development of new anticancer and antimicrobial agents.
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