Photodynamic inactivation assisted by localized surface plasmon resonance of silver nanoparticles: In vitro evaluation on Escherichia coli and Streptococcus mutans

Ribeiro, Martha S.; Melo, Letícia Santos Alves de; Farooq, Sajid; Baptista, Alessandra; Kato, Ilka Tiemy; Núñez, Silvia Cristina; Araujo, Renato E. de

doi:10.1016/j.pdpdt.2018.04.007

Cited by 36 publications

(12 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Evaluate the molecular interaction on the surface of a nanoparticle. Depends on several factors: particle's size and shape, electronic properties, dielectric media, and temperature [13] The size, morphology, surface, and particle distribution of nanoparticles have proven to influence the physicochemical properties of AgNPs which can be altered through various synthesis methods, reducing agents, and stabilizers [14]. Size has been the determining factor of biological properties of AgNPs and can be adjusted according to specific application typically in the range from 2 nm until 100 nm e.g., the size of AgNPs for drug delivery application need to be greater than 100 nm to accommodate for the quantity of the drug to be delivered [15].…”

Section: X-ray Diffractionmentioning

confidence: 99%

The Potential of Silver Nanoparticles for Antiviral and Antibacterial Applications: A Mechanism of Action

et al. 2020

View full text Add to dashboard Cite

Rapid development of nanotechnology has been in high demand, especially for silver nanoparticles (AgNPs) since they have been proven to be useful in various fields such as medicine, textiles, and household appliances. AgNPs are very important because of their unique physicochemical and antimicrobial properties, with a myriad of activities that are applicable in various fields, including wound care management. This review aimed to elucidate the underlying mechanisms of AgNPs that are responsible for their antiviral properties and their antibacterial activity towards the microorganisms. AgNPs can be synthesized through three different methods—physical, chemical, and biological synthesis—as indicated in this review. The applications and limitations of the AgNPs such as their cytotoxicity towards humans and the environment, will be discussed. Based on the literature search obtained, the properties of AgNPs scrutinizing the antibacterial or antiviral effect shown different interaction towards bacteria which dependent on the synthesis processes followed by the morphological structure of AgNPs.

show abstract

Section: X-ray Diffractionmentioning

confidence: 99%

The Potential of Silver Nanoparticles for Antiviral and Antibacterial Applications: A Mechanism of Action

et al. 2020

View full text Add to dashboard Cite

show abstract

“…One possiblility is the development of new photosensitizers, while another is the combination with other compounds. Applying silver nanoparticles together with riboflavin as photosensitizer increased the bactericidal activity of aPDT on Streptococcus mutans but not on E. coli [29]. Antimicrobial peptides were used together with rose bengal as photosensitizer and the followed illumination killed efficiently a multi-resistant Pseudomonas aeruginosa strain [30].…”

Section: Discussionmentioning

confidence: 99%

In- vitro-activity of additive application of hydrogen peroxide in antimicrobial photodynamic therapy using LED in the blue spectrum against bacteria and biofilm associated with periodontal disease

Kunz

Wirth

Sculean

et al. 2019

Photodiagnosis and Photodynamic Therapy

View full text Add to dashboard Cite

Background: Although antimicrobial photodynamic therapy (aPDT) has been shown to be efficient in killing planktonic periodontopathogenic bacteria, its activity on established biofilms is very limited. The aim of the present in-vitro study was to evaluate the potential effect of hydrogen peroxide as a pretreatment for aPDT. Methods: aPDT consisting of riboflavin as photosensitizer and illumination by a LED lamp emitting in the blue spectrum for 30 s and 60 s (aPDT60) was combined with a pretreatment with 0.25% and 3% hydrogen peroxide. The antimicrobial activity of these treatments was determined against eight oral species (incl. Porphyromonas gingivalis and Tannerella forsythia) and against eight-species biofilms. Treatment of biofilms in an artificial pocket model included a mechanical removal of the biofilm. Results: Against planktonic bacteria, pretreatment with hydrogen peroxide increased killing of planktonic bacteria, after aPDT60 no viable bacteria were detected in 7 of 8 strains. In biofilms formed on well-plates, aPDT60 reduced bacterial counts only by 0.53 log10 cfu, whereas reduction was closed to 4 log10 or higher when 3% hydrogen peroxide was used. When biofilms were treated in the periodontal-pocket model, reduction of cfu was less than 0.5 log10 after mechanical therapy or aPDT60 only, however no bacteria were detected after mechanical biofilm removal followed by the use 3% of hydrogen peroxide and aPDT60. Conclusions: aPDT using riboflavin and blue LED light applied after mechanical removal of biofilm and adjunctive 3% hydrogen peroxide solution appears to represent an alternative for antimicrobial periodontal therapy.

show abstract

“…It was reported that the detection limit for dopamine can vary inversely with the aspect ratio of plasmonic nanoparticles [151,152]. LSPR sensors allow the bioanalysis of different kinds of biomarkers that facilitate the diagnosis of cancer [153], pathogens [146,154], auto-immune diseases and immunodiagnostics [86,155] and constitute an important class of biosensors that are capable of replacing the conventional SPR-based detection strategies [84].…”

Section: Localised Surface Plasmon Resonance Sensors For Biomedical Dmentioning

confidence: 99%

Recent Progress in Optical Sensors for Biomedical Diagnostics

Pirzada

Altıntaş

2020

Micromachines

View full text Add to dashboard Cite

In recent years, several types of optical sensors have been probed for their aptitude in healthcare biosensing, making their applications in biomedical diagnostics a rapidly evolving subject. Optical sensors show versatility amongst different receptor types and even permit the integration of different detection mechanisms. Such conjugated sensing platforms facilitate the exploitation of their neoteric synergistic characteristics for sensor fabrication. This paper covers nearly 250 research articles since 2016 representing the emerging interest in rapid, reproducible and ultrasensitive assays in clinical analysis. Therefore, we present an elaborate review of biomedical diagnostics with the help of optical sensors working on varied principles such as surface plasmon resonance, localised surface plasmon resonance, evanescent wave fluorescence, bioluminescence and several others. These sensors are capable of investigating toxins, proteins, pathogens, disease biomarkers and whole cells in varied sensing media ranging from water to buffer to more complex environments such as serum, blood or urine. Hence, the recent trends discussed in this review hold enormous potential for the widespread use of optical sensors in early-stage disease prediction and point-of-care testing devices.

show abstract

Photodynamic inactivation assisted by localized surface plasmon resonance of silver nanoparticles: In vitro evaluation on Escherichia coli and Streptococcus mutans

Cited by 36 publications

References 39 publications

The Potential of Silver Nanoparticles for Antiviral and Antibacterial Applications: A Mechanism of Action

The Potential of Silver Nanoparticles for Antiviral and Antibacterial Applications: A Mechanism of Action

In- vitro-activity of additive application of hydrogen peroxide in antimicrobial photodynamic therapy using LED in the blue spectrum against bacteria and biofilm associated with periodontal disease

Recent Progress in Optical Sensors for Biomedical Diagnostics

Contact Info

Product

Resources

About