[The effect of natural polyphenol complex of red grape wine on L-arginine/NO system in peripheral blood of rats under low doses of ionizing radiation].

The total activity of NO-synthase and content of stable metabolitic products of nitric oxide in the peripheral blood of rats under low doses of ionizing radiation and administration of natural polyphenol complex of grape was investigated. It was found that natural polyphenol compounds of grapes have the ability to correct radioinduced changes in L-arginine/NO system. It was noted that the action of X-radiation increased activity of NO-synthase in the peripheral blood of rats.

[Activity of antioxidant enzymes in enterocytes of the small intestine and blood cells after ionizing irradiation and administration of vitamin E in rats].

The long-term influence of low X-ray irradiation increases lipid peroxidation (LP) in radiosensitive (bone marrow, enterocytes of small intenstine) and in relatively radioresistant blood cells (erythrocytes). The activation of antioxidant system enzymes in observed cells does not decrease LP intensity. We concluded that additional administration of alpha-tocopherol provided the decrease of the first and end products of LP in the observed tissues mostly in the beginning of the experiment.

[Small doses of X-ray irradiation activate the NO-synthase component of the nitric oxide cycle].

It has been shown that chronic X-ray irradiation, (CRI), activates the formation of NO in rats. This is apparent in the increase in the level of NO2- in the blood plasma from 12.59 +/- 1.

[Effects of chronic radiation exposure on erythrocyte metabolism and functioning].

The structural and functional state of blood erythrocytes in people exposed to radiation during Chernobyl NPP accident was studied two or six years later. The changes in oxygen transport system of erythrocytes and in the ratio between some organic phosphate fractions were observed. The beta-carotene per os administration to rats during low-level irradiation increased hemolytic stability and activity of glycolytic enzymes, that bears witness to the increasing of organism adaptive reactions at provitamin administration during irradiation.