Bio-fabricated silver nanoparticles preferentially targets Gram positive depending on cell surface charge

Mandal, Debasis; Dash, Sandeep Kumar; Das, Balaram; Chattopadhyay, Sourav; Ghosh, Totan; Das, Debasis; Roy, Somenath

doi:10.1016/j.biopha.2016.07.011

Cited by 86 publications

(55 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The work of Abbaszadegan et al (2015) states that the antimicrobial action of the nanoparticle shelf depends on the charge of the external surface of the particles as influenced by the stabilizers and capping agents used in the synthesis; thus, the AgNP fabricated in the present study can be considered negatively charged. According to Mandal et al (2016), the mechanism of AgNP action depends on the outer charge of the bacterial membranes, and this may explain the decreased susceptibility of S. mutans. Furthermore, the physical and chemical properties of the AgNP related to the release of Ag + ions are noteworthy.…”

Section: Discussionmentioning

confidence: 99%

Sodium trimetaphosphate and hexametaphosphate impregnated with silver nanoparticles: characteristics and antimicrobial efficacy

et al. 2018

View full text Add to dashboard Cite

This study aimed to synthesize and characterize materials containing silver nanoparticles (AgNP) with polyphosphates (sodium trimetaphosphate (TMP) or sodium hexametaphosphate (HMP), and evaluate their effect against Candida albicans and Streptococcus mutans. The minimum inhibitory concentration (MIC) was determined, which was followed by the quantification of the biofilm by counting colony-forming units (CFUs), the amount of metabolic activity, and the total biomass. The MICs revealed greater effectiveness of composites containing 10% Ag (TMP + Ag10% (T10) and HMP + Ag10% (H10)) against both microorganisms. It was observed that T10 and H10 reduced the formation of biofilms by 56-76% for C. albicans and by 52-94% for S. mutans for total biomass and metabolic activity. These composites promoted significant log reductions in the number of CFUs, between 0.45-1.43 log for C. albicans and 2.88-3.71 log for S. mutans (p < .001). These composites demonstrated significant antimicrobial activity, especially against S. mutans, and may be considered a potential alternative for new dental materials.

show abstract

Section: Discussionmentioning

confidence: 99%

Sodium trimetaphosphate and hexametaphosphate impregnated with silver nanoparticles: characteristics and antimicrobial efficacy

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Zeta potential is another physico-chemical property that has an effect on antimicrobial activity since the interaction between nanoparticles and the cell membrane is based on electrostatic adhesion. [150][151][152] In their study, El Badawy et al synthesized AgNPs having various zeta potentials and investigated the antibacterial activity against Bacillus species. 153 They found a direct correlation between the nanoparticle surface charge and antibacterial activity.…”

Section: Factors Affecting the Antimicrobial Activity Of Silver Nanopmentioning

confidence: 99%

Green synthesis of silver nanoparticles: biomolecule-nanoparticle organizations targeting antimicrobial activity

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The tolerance level of the tested pathogens against sAgNPs was determined from MBC/MIC ratio and was found to be 4. When MBC/MIC ratio is ≥16, the test agent is considered to have bacteriostatic effect, and when ≤4, it is considered to be bactericidal . Based on this, sAgNPs used in this study might have exerted bactericidal effects to both S .…”

Section: Resultsmentioning

confidence: 98%

Antibacterial Effectiveness of Rice Water (Starch)‐Capped Silver Nanoparticles Fabricated Rapidly in the Presence of Sunlight

Mathew

Raveendran

Mathew

et al. 2018

Photochem & Photobiology

View full text Add to dashboard Cite

Green synthesized silver nanoparticles (AgNPs) have enormous applications. Hence, there is an increasing demand to explore diverse bioresources for AgNP fabrication to make the process more cost-effective and rapid as possible. Due to the abundantly present hydroxyl groups of rice starch, it provides ideal sites for metal ion complexation and thereby synthesis of nanoparticles with promising activity. So the study was designed to develop rapid, eco-friendly and cost-effective method for green AgNP synthesis using boiled rice water starch in the presence of sunlight irradiation. The starch-capped nanoparticles (sAgNPs) formed in the study were found to have the surface plasmon absorbance at 439 nm. The study showed optimum yield of sAgNPs when 25% rice starch was treated with aqueous 1 mM AgNO for 15 min in the presence of sunlight. Fourier transform infrared spectroscopy analysis provided mechanistic insight into the role of -OH groups of starch in the reduction of AgNO to sAgNPs. On further characterization by X-ray diffraction analysis, the sAgNPs were identified to have FCC crystal structure. At the same time, high-resolution transmission electron microscopic analysis showed majority of sAgNPs to have spherical morphology, and dynamic light scattering study revealed the average particle size as 36.3 nm. Further confirmation on presence of AgNPs was carried out by energy-dispersive X-ray spectroscopy. Moreover, the sAgNPs exhibited promising antibacterial activity against foodborne pathogens, Salmonella Typhimurium and Staphylococcus aureus.

show abstract

Bio-fabricated silver nanoparticles preferentially targets Gram positive depending on cell surface charge

Cited by 86 publications

References 52 publications

Sodium trimetaphosphate and hexametaphosphate impregnated with silver nanoparticles: characteristics and antimicrobial efficacy

Sodium trimetaphosphate and hexametaphosphate impregnated with silver nanoparticles: characteristics and antimicrobial efficacy

Green synthesis of silver nanoparticles: biomolecule-nanoparticle organizations targeting antimicrobial activity

Antibacterial Effectiveness of Rice Water (Starch)‐Capped Silver Nanoparticles Fabricated Rapidly in the Presence of Sunlight

Contact Info

Product

Resources

About