scholarly journals Synergic antibacterial effect between visible light and hydrogen peroxide on Streptococcus mutans

2006 ◽  
Vol 57 (5) ◽  
pp. 872-876 ◽  
Author(s):  
Osnat Feuerstein ◽  
Daniel Moreinos ◽  
Doron Steinberg
Keyword(s):  
Hydrogen Peroxide ◽  
Visible Light ◽  
Streptococcus Mutans ◽  
Antibacterial Effect

scholarly journals Genetic and Physiological Effects of Noncoherent Visible Light Combined with Hydrogen Peroxide on Streptococcus mutans in Biofilm

2008 ◽  
Vol 52 (7) ◽  
pp. 2626-2631 ◽  
Author(s):  
Doron Steinberg ◽  
Daniel Moreinos ◽  
John Featherstone ◽  
Moshe Shemesh ◽  
Osnat Feuerstein
Keyword(s):  
Gene Expression ◽  
Hydrogen Peroxide ◽  
Visible Light ◽  
Streptococcus Mutans ◽  
Laser Scanning ◽  
Antibacterial Effect ◽  
Laser Scanning Microscopy ◽  
Confocal Laser ◽  
Planktonic Bacteria ◽  
Deep Layers

ABSTRACT Oral biofilms are associated with the most common infections of the oral cavity. Bacteria embedded in the biofilms are less sensitive to antibacterial agents than planktonic bacteria are. Recently, an antibacterial synergic effect of noncoherent blue light and hydrogen peroxide (H2O2) on planktonic Streptococcus mutans was demonstrated. In this study, we tested the effect of a combination of light and H2O2 on the vitality and gene expression of S. mutans embedded in biofilm. Biofilms of S. mutans were exposed to visible light (wavelengths, 400 to 500 nm) for 30 or 60 s (equivalent to 34 or 68 J/cm2) in the presence of 3 to 300 mM H2O2. The antibacterial effect was assessed by microbial counts of each treated sample compared with that of the control. The effect of light combined with H2O2 on the different layers of the biofilm was evaluated by confocal laser scanning microscopy. Gene expression was determined by real-time reverse transcription-PCR. Our results show that noncoherent light, in combination with H2O2, has a synergistic antibacterial effect through all of the layers of the biofilm. Furthermore, this treatment was more effective against bacteria in biofilm than against planktonic bacteria. The combined light and H2O2 treatment up-regulated the expression of several genes such as gtfB, brp, smu630, and comDE but did not affect relA and ftf. The ability of noncoherent visible light in combination with H2O2 to affect bacteria in deep layers of the biofilm suggests that this treatment may be applied in biofilm-related diseases as a minimally invasive antibacterial procedure.

Visible light-induced antibacterial effect of MoS2: Effect of the synthesis methods

2021 ◽  
Vol 411 ◽  
pp. 128517
Author(s):  
Manman Zhang ◽  
Kun Wang ◽  
Shaohua Zeng ◽  
Ying Xu ◽  
Wangyan Nie ◽  
...  
Keyword(s):  
Visible Light ◽  
Antibacterial Effect ◽  
Synthesis Methods

Reusable iron sulfide nanospheres towards promoted photocatalytic and electrocatalytic activities

2017 ◽  
Vol 41 (18) ◽  
pp. 10083-10095 ◽  
Author(s):  
Bibhutibhushan Show ◽  
Nillohit Mukherjee ◽  
Anup Mondal
Keyword(s):  
Hydrogen Peroxide ◽  
Visible Light ◽  
Iron Sulfide ◽  
Sensing Properties ◽  
Electrochemically Deposited

Electrochemically deposited FeS nanospheres were found to degrade efficiently a series of toxic pigments and phenol in the presence of visible light. The material also showed excellent hydrogen peroxide sensing properties.

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