Biogenic synthesis of Adhatoda vasica L. Nees mediated silver nanoparticles and their antibacterial, anticancer activity on Hep-G2 cell lines

Abstract

The present investigation has been studied with the green synthesis of silver nanoparticles (AgNPs) using medicinally valued Adhatoda vasica -Nees and to evaluate the antibacterial and anticancer activity against HEP-G2 (Human epithelium cells of liver cancer) cell lines. The UV-Vis spectroscopy results show a strong resonance centered on the surface of silver nanoparticles at 420 nm. Fourier transform infrared (FT-IR) spectroscopy study demonstrates A. vasica aqueous extract acted as the reducing and stabilizing agent during the synthesis. The X-ray diffraction (XRD) analysis confirmed that the synthesized AgNPs are single crystalline face-centered cubic in structure, average crystal size 21 nm. Scanning electron microscope–energy dispersive spectroscopy (SEM-EDS) image confirmed synthesis of relatively uniform nanoparticles. The EDS analysis of the nanoparticles dispersion, using a range of 2-4 keV, confirmed the presence of elemental silver, without any contamination. The antibacterial activities were carried out against pathogenic bacteria. The maximum zone of inhibition was observed in the synthesized AgNPs (10µg/mL) against Staphylococcus sp. (16mm), Klebsiella sp. (14.5mm). The cytotoxicity activity as evidence by MTT assay with HEP-G2 cell lines. The synthesized AgNPs are ready for the application in the field of nanomedicine against pathogenic bacteria and very good anticancer drug.