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Antimicrobial activity of cream incorporated with silver nanoparticles biosynthesized from Withania somnifera

Authors Marslin G, Selvakesavan RK, Franklin G, Sarmento B, Dias ACP

Received 21 January 2015

Accepted for publication 16 April 2015

Published 22 September 2015 Volume 2015:10(1) Pages 5955—5963

DOI https://doi.org/10.2147/IJN.S81271

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 5

Editor who approved publication: Dr Thomas J Webster

Gregory Marslin,1 Rajendran K Selvakesavan,1 Gregory Franklin,1 Bruno Sarmento,2,3 Alberto CP Dias1

1Centre for the Research and Technology of Agro-Environment and Biological Sciences (CITAB-UM), AgroBioPlant Group, Department of Biology, University of Minho, Braga, Portugal; 2Instituto de Engenharia Biomédica (INEB), University of Porto, Porto, Portugal; 3CESPU, Instituto Universitário de Ciências da Saúde, Gandra, Portugal

Abstract: We report on the antimicrobial activity of a cream formulation of silver nanoparticles (AgNPs), biosynthesized using Withania somnifera extract. Aqueous extracts of leaves promoted efficient green synthesis of AgNPs compared to fruits and root extracts of W. somnifera. Biosynthesized AgNPs were characterized for their size and shape by physical-chemical techniques such as UV-visible spectroscopy, laser Doppler anemometry, transmission electron microscopy, scanning electron microscopy, atomic force microscopy, X-ray diffraction, and X-ray energy dispersive spectroscopy. After confirming the antimicrobial potential of AgNPs, they were incorporated into a cream. Cream formulations of AgNPs and AgNO3 were prepared and compared for their antimicrobial activity against human pathogens (Staphylococcus aureus, Pseudomonas aeruginosa, Proteus vulgaris, Escherichia coli, and Candida albicans) and a plant pathogen (Agrobacterium tumefaciens). Our results show that AgNP creams possess significantly higher antimicrobial activity against the tested organisms.

Keywords: Withania somnifera, green synthesis, silver nanoparticles cream, antimicrobial activity

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