Recently, many interdisciplinary community researchers have focused their efforts on study of the low-level light irradiation effects (photobiomodulation, PBM) as a promising therapeutic technology. Among the priorities, a search of new wavelength ranges of laser radiation to enhance the laser prospects in treatment of autoimmune and cancer diseases commonly accompanied by disorders in the antioxidant system of the body. The laser wavelengths within 1265-1270 nm corresponds to the maximum oxygen absorption band. Therefore, PBM effects on a model organism within this spectrum range are of particular interest for preclinical research. Here, we report comprehensive biomolecular studies of the changes in the BALB/c nude mice skin after an exposure to the continuous laser radiation at the 1270 nm wavelength and energy densities of 0.12 and 1.2 J/cm 2. Such regime induces both local and systemic PBM effects, presumably due to the short-term increase in ROS levels, which in turn activate the cell antioxidative system.
Исследуется влияние непрерывного лазерного излучения на длине волны 1265 нм на ре-докс-зависимые процессы в организме-опухоленосителе с привитым раком шейки матки РШМ-5. Рассматривается возможность использования указанного диапазона длин волн для фотодина-мической терапии на основе светокислородного эффекта. Вместе с тем проанализирована воз-можность развития побочных эффектов, в частности лазериндуцированного канцерогенеза, под воздействием лазерного излучения на соответствующей длине волны.Ключевые слова: ВКР-лазер, оксидативный стресс, редокс-зависимые процессы, рак шейки матки. THE EFFECT OF LASER RADIATION AT 1265 NM ON REDOX-DEPENDENT PROCESSES IN TUMOR-BEARING ORGANISMSWe study the effect provided by a quasi-continuous wave laser operating at the wavelength of 1265 nm on redox-dependent processes in tumor-bearing organism implanted with cervical cancer-5 (CC5). The laser wavelength is eligible for potential applications in photodynamic therapy based on light-oxygen effect. Also, we analyze possible side effects, in particular, laser-induced carcinogenesis.
ВЛИЯНИЕ ПИКОСЕКУНДНОГО ЛАЗЕРНОГО ОБЛУЧЕНИЯ IN VIVO НА ЭРИТРОЦИТЫ И КОЖУ МЫШЕЙУстановлены существенные изменения структуры кожи после облучения различной интенсивности пикосекундным лазерным излучением на длине волны 1560 нм и пиковой мощностью около 4 кВт, в том числе такие изменения, как утолщение эпидермиса, увеличение функциональной активности ядер, возникновение инфильтрации разной степени в зависимости от интенсивности облучения. Установлена активность антиоксидантных ферментов: супероксиддисмутаза увеличивается относительно контроля после воздействия лазерного излучения в обоих режимах. Зафиксированы признаки оксидативного стресса.Ключевые слова: пикосекундное лазерное излучение (ПСЛИ), перекисное окисление липидов, оксидативный стресс, эпидермис, дерма.Substantial changes are found in the structure of the skin after irradiation by varying -intensity picosecond laser radiation at a wavelength of 1,560 nm and a peak power of about 4 kW: including such changes as a thickening of the epidermis, the increase of the functional activity of the nuclei, varying degrees of infiltration of occurrence depending on the intensity of exposure. It is established the activity of antioxidant enzymes: superoxide dismutase is increased relative to controls after exposure to laser light in both modes. Signs of oxidative stress are observed.
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