The photobiomodulation of vital parameters of the cancer cell culture by low dose of near-IR laser irradiation

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Abstract

The mechanisms underlining the cell adaptive and/or activating oxidative stress called low level light (LLLT) or photobiomodulation therapies (PBMT) still remain unclear for near-infrared (NIR) spectrum range (750-3000 nm) especially for 1265-1270 nm range (highest absorption by molecular oxygen). It is most probably that the mitochondrium may also appear to be the main target for these wavelengths. It is known that mitochondria can generate ROS under visible and 800-1060nm spectrum ranges which in turn control voltage-dependent anion channels (VDAC). Here we investigated cellular damage caused by low doses of 1265-70 nm laser radiation regarding to VDAC activity in the cancer cell culture exposed to low-level laser irradiation at 1265 nm. We observed that the laser radiation at 1265 nm can induce the oxidative stress, enhance apoptosis and disturb mitochondrial functioning at the energy density of 9.54 J/cm2. In addition, inhibition of VDAC enhances the observed effects. It has been shown that the laser irradiation at 1265 nm damages mitochondrial DNA but does not affect the nuclear DNA. The performed experiments bring us to the conclusion that the laser irradiation at 1265 nm can affect cells through mitochondrial damage and the inhibition of VDAC enhances effects of PBMT.

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Original languageEnglish
Article number8410463
JournalIEEE Journal of Selected Topics in Quantum Electronics
Volume25
Issue number1
Early online date12 Jul 2018
DOIs
Publication statusE-pub ahead of print - 12 Jul 2018

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© 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

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