2015
DOI: 10.1590/1414-431x20154459 View full text |Buy / Rent full text
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Abstract: Low-level lasers are used at low power densities and doses according to clinical protocols supplied with laser devices or based on professional practice. Although use of these lasers is increasing in many countries, the molecular mechanisms involved in effects of low-level lasers, mainly on DNA, are controversial. In this study, we evaluated the effects of low-level red lasers on survival, filamentation, and morphology of Escherichia colicells that were exposed to ultraviolet C (UVC) radiation. Exponential and… Show more

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“…In addition, it has also been suggested that LLLT may promote changes in the cell's redox state, playing an important role in ion homeostasis and consequently in cellular activity and induce photobiostimulation processes. Besides that, preexposure of PBM has a protective effect against many external agents, such as hydrogen peroxide (H 2 O 2 ) and UV radiation [124,125].…”
Section: Photobiomodulationmentioning
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“…In addition, it has also been suggested that LLLT may promote changes in the cell's redox state, playing an important role in ion homeostasis and consequently in cellular activity and induce photobiostimulation processes. Besides that, preexposure of PBM has a protective effect against many external agents, such as hydrogen peroxide (H 2 O 2 ) and UV radiation [124,125].…”
Section: Photobiomodulationmentioning
“…It was suggested that LLLT might promote changes in the cellular redox state, playing an important role in sustaining cellular activities, and induce photobiostimlative processes [64]. In addition to the above, pre-exposure of PBM had a protective effect against many external agents such as hydrogen peroxide, H 2 O 2 , and UV radiation [65,66]. There is an evolutionary standpoint confirm that NIR pre-exposure protect cells from the hazard impacts of UV exposure, and the re-exposure for NIR radiation could be important for protection maintenance [67,68]…”
Section: Optical Sources and Biological Interactionmentioning
“…It was suggested that LLLT might promote changes in the cellular redox state, playing an important role in sustaining cellular activities and inducing photo-biostimulative processes [6]. In addition to the above, preexposure of LLLT had a protective effect against many external agents such as hydrogen peroxide (H 2 O 2 ) and UV radiation [7]. In chronic viral diseases the laser therapy provides compensation for NO deficiency, which increases the overall defense of the body against free radicals and reduces the severity of oxidative stress [8].…”
Section: Introductionmentioning