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Laser Device for the Protection of Biological Objects from the Damaging Action of Ionizing Radiation

Journal of Physical Science and Application 2012年第6期2卷 152-157页

作者： Karine Voskanyan Svetlana Vorozhtsova alia abrosimova Gennady Mitsyn Victor Gaevsky Joint Institute for Nuclear Research Dubna 141980 Russia Institute of Medico-Biological Problems of the Russian Academy of Sciences Moscow 123007 Russia

Laser irradiation device for the protection of biological objects from the action of ionizing radiation to be used in practice has been manufactured （invention patent RU 2 428 228 C2）. Research of the action of y-radiation itself as well as of the combined action of laser devices on survival, weight, skin and the general mitotic index of the bone marrow cells （mitotic index of all nucleus-containing cells of the bone marrow） of C57BL/6 experimental young mice was carried out. The mice were irradiated with ionizing （whole body irradiation） and laser radiation, separately one by one in a special frame device. Laser radiation in the dose 1 mJ/cm^2 irradiated only the back of a mouse, or both the back and the abdomen of mice. In case of combined irradiation of mice, the time interval between two types of irradiation did not exceed 30 min. First, the mice were exposed to y-radiation then to laser radiation. The method of the laser radiation-protection of biological subjects contributes to an increase in the viability of mice, prevents the damages of skin and also increases the mitotic activity of mice bone marrow cells.

关键词： Radiation protection laser radiation mitotic activity of bone marrow cells.

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The Effectiveness of Radiation Damage Reduction in Mice by Laser Light in Dependence of the Time Interval between Exposures

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Journal of Physical Science and Application 2015年第4期5卷 291-295页

作者： Karine Voskanyan Svetlana Vorozhtsova alia abrosimova Gennady Mitsyn Victor Gaevskiy Joint Institute for Nuclear Research Dubna 141980 Russia Institute of Medico-Biological Problems of the Russian Academy of Sciences Moscow 123007 Russia

A research was carried out to determine the period of time during which it is possible to reduce the radiation damage in mice by means of laser radiation （650 nm） after gamma irradiation. First, the mice were exposed to γ- radiation （whole body irradiation）, then after 2 h or 24 h they were irradiated with laser radiation. The results of these studies have shown that the use of laser irradiation to reduce radiation damage in mice is effective 24 h after the exposure to 5 Gy ionizing radiation which leads to the bone-marrow clinical form of the ARS （Acute radiation sickness）. In case of the lethal dose of ionizing radiation 7 Gy （the transitional clinical form of the ARS）, the increase in life expectancy of mice is observed using laser radiation both 2 and 24 h after the exposure to γ- radiation, but the effectiveness of the laser used 2 h after the ionizing radiation is significantly more efficient.

关键词： Gamma radiation laser radiation reduction of the radiation damage.

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Reduction of Radiation Damage in Mice after Acute and Prolonged Irradiation with Gamma Rays by Means of Laser Device

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Journal of Physical Science and Application 2014年第8期4卷 501-506页

作者： Karine Voskanyan Svetlana Vorozhtsova alia abrosimova Gennady Mitsyn Victor Gaevsky Alexander Molokanov Joint Institute for Nuclear Research Dubna 141980 Russia Institute of Medico-Biological Problems of the Russian Academy of Sciences Moscow 123007 Russia

An opportunity to use laser radiation as a means to reduce negative aftermath of acute and prolonged exposure to ionizing radiation was checked. The mice were exposed to γ- rays of ^60Co （whole body irradiation） in the dose of 7 Gy （the transitional clinical form of the acute radiation sickness）. The dose rate at acute irradiation was 1.14 Gy/min, and at prolonged exposure, 0.027 Gy/min. Laser radiation in the dose l mJ/cm^2 was used to irradiate only the back of a mouse. First, the mice were exposed to γ-radiation, then to laser radiation. The time interval between two types of irradiation did not exceed 30 min. It was shown that the radiation protection of mice with laser radiation is possible at exposure to ionizing radiation in a wide dose interval and can reduce negative after-effects of both the acute and prolonged radiation exposure.

关键词： Radiation protection prolonged irradiation laser radiation.

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