Antiinfectives and Low-Level Light: A New Chapter in Photomedicine

Sommer, Andrei P.

doi:10.1089/pho.2007.2058

Cited by 11 publications

(6 citation statements)

References 40 publications

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“…10 It is based on the effect of visible light on the viscosity and density profile of interfacial water layers and confined water at room temperature, in particular, on the finding that exposure to moderately intense red light (670 nm) instantly increased the fluidity and decreased the density of interfacial water layers on hydrophilic surfaces. 11 Because of the hydrophilic nature of the total surface found in cells (macromolecules and organelles), most of the water confined in cells is necessarily interfacial water.…”

Section: Resultsmentioning

confidence: 99%

Extraordinary Anticancer Effect of Green Tea and Red Light

Sommer

Zhu²,

Scharnweber³

2010

Photomedicine and Laser Surgery

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Section: Resultsmentioning

confidence: 99%

Extraordinary Anticancer Effect of Green Tea and Red Light

Sommer

Zhu²,

Scharnweber³

2010

Photomedicine and Laser Surgery

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“…Thus, the results of our study where the irradiation with the two different doses (3 J at 0.25 W/10 Hz or 59 J at 1 W/10 Hz) resulted in a reduction in S. mutans and C. albicans amount in the same session can be explained by this above-mentioned phenomenon. The effect of laser on bacterial/fungal destruction was also described by Sommer where the expansion and contraction of the intracellular water volume and fluidity generate bidirectional flow [ 27 ].…”

Section: Discussionmentioning

confidence: 99%

Effects of Nd:YAG laser irradiation on the growth of Candida albicans and Streptococcus mutans: in vitro study

et al. 2018

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The purpose of this study was to evaluate the effects of Nd:YAG laser with flat-top handpiece on the in vitro growth of Candida albicans and Streptococcus mutans. The incidence of C. albicans (opportunistic commensal) and S. mutans (facultatively anaerobic) infections is increasing, despite available treatments. Cultures of Streptococcus mutans and Candida albicans were irradiated using Nd:YAG laser (LightWalker, Fotona) with flat-top handpiece (Genova, LightWalker, Fotona) at the following parameters: group G1: 0.25 W, 10 Hz, 15 s, 3 J and group G2: 1 W, 10 Hz, 60s, 59 J. The results were evaluated directly and 24 h after irradiation using a quantitative culture method (estimation of colony-forming units in 1 ml of suspension, cfu/ml), and microscopic analysis with Janus green stain and compared with control group in which laser was not applied. C. albicans was reduced by 20 up to 54% for G1, and for G2 by 10 up to 60% directly after the application. The cfu/ml values for S. mutans decreased by 13% (p = 0.1771) for G1 and 89% (p < 0.0001) for G2. In both test groups 24 h after the application, the number of colony-forming units decreased by 15-46% for G1 and by 15-64% for G2. The arrested cell division, increasing the surface area and increasing the number of metabolically inactive cells, were observed in morphometric analysis. Macroscopic and microscopic analyses revealed a reduction in cell number and a significant decrease of cell metabolism after laser application for both C. albicans and S. mutans.

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“…The effect of laser on bacterial/fungal destruction was also described by Sommer, where the expansion and contraction of the intracellular water volume and fluidity generate bidirectional flow 28) . This phenomenon likely accounts for our findings, where the irradiation with the two different doses (500 J and 700 J at 15 W/25 Hz) resulted in a reduction in S. aureus and P. aeruginosa amount.…”

Section: Discussionmentioning

confidence: 85%

Effect of high-power Nd:YAG laser on the growth of <i>Staphylococcus aureus</i> and <i>Pseudomonas aeruginosa</i>: an experimental study

et al. 2021

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The aim of this study was to evaluate the effect of high-power Nd:YAG laser on Staphylococcus aureus and Pseudomonas aeruginosa bacterial growth. [Materials and Methods] Seven samples of S. aureus and seven samples of P. aeruginosa were prepared in the microbiology lab, one used as a control sample and the remaining six samples used as experimental samples, which were irradiated by a high-power laser (LASERSIX ME, 15W) with a total dose of 500 and 700 J. The primary measure was the semi-qualitative assessment of turbidity and bacterial count; the turbidity was assessed 24 h after laser application. [Results] There was a significant decrease in turbidity in all experimental samples of S. aureus and P. aeruginosa after 24 h of high-power laser application for 500 and 700 J and a significant decrease in the colony-forming unit (CFU) value in both types, and there were no significant differences in turbidity and CFU when comparing 500 and 700 J. [Conclusion] A high power Nd:YAG laser was found to be an effective modality for inhibition of S. aureus and P. aeruginosa growth.

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Antiinfectives and Low-Level Light: A New Chapter in Photomedicine

Cited by 11 publications

References 40 publications

Extraordinary Anticancer Effect of Green Tea and Red Light

Extraordinary Anticancer Effect of Green Tea and Red Light

Effects of Nd:YAG laser irradiation on the growth of Candida albicans and Streptococcus mutans: in vitro study

Effect of high-power Nd:YAG laser on the growth of <i>Staphylococcus aureus</i> and <i>Pseudomonas aeruginosa</i>: an experimental study

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