Green synthesis of silver nanoparticles using Nardostachys jatamansi and evaluation of its anti-biofilm effect against classical colonizers

In this communication, we present the green synthesis of silver nanoparticles (AgNPs) using medicinally important Nardostachys jatamansi rhizome extract in the presence of sunlight. UV-vis spectroscopy, Fourier Transform Infrared spectroscopy (FTIR), Transmission electron microscope (TEM) and Energy dispersive X-ray analysis (EDX) were employed to characterize the synthesized AgNPs. UV-visible spectroscopic studies confirmed the presence of biosynthesized AgNPs. Transmission Electron Microscopic studies revealed the structure of spherical AgNPs in the diameter range of 10-15 nm. Energy dispersive X-ray analysis and elemental mapping clearly confirmed the presence of silver in AgNPs samples. Interestingly, biomolecules functionalised AgNPs exhibited a remarkable antioxidant, anti-inflammatory, and anti-biofilm activities and hence biosynthesized AgNPs from N. jatamansi can be used as a promising biomaterial for biomedical applications.

L-Methionine based phenolic compound mediates unusual assembly of AgNPs and exerts efficient anti-biofilm effect

A methionine based phenolic chelating ligand together with PSS, PVA, PVP and SDS capping agents produced an unusual self-assembly of AgNPs and strong anti-biofilm effect.

Identification of benzochromene derivatives as a highly specific NorA efflux pump inhibitor to mitigate the drug resistant strains of S. aureus

Benzochromene (BC) derivatives identified as potent EPI against NorA efflux pump. BC displays 32-fold ciprofloxacin MIC reversal against NorA overexpressing mutant. BC as an adjuvant with antibiotic can curtail MDRS. aureus.

Copper nanoparticles as an efflux pump inhibitor to tackle drug resistant bacteria

Casein capped copper nanoparticles at sub inhibitory concentrations function as an efflux pump inhibitor and restores susceptibility to antibiotics in drug resistant bacteria.

Dual role of pinostrobin-a flavonoid nutraceutical as an efflux pump inhibitor and antibiofilm agent to mitigate food borne pathogens

Drastic 128 fold MIC reversal in MRSA stain via EPI effect. Remarkable anti-biofilm effect against gram negative bacteria. Efflux pump other than NorA is involved.