[The first results of a combined all-Russian study on clinical genetics of multiple sclerosis].

Multiple sclerosis is a classic multifactorial disease in which etiology interaction of external factors and structural features of a large number of genes plays an important role. Identifying risk factors for multiple sclerosis and creating an integrated model of pathogenesis are urgent tasks of neurology. Revealing true risk factors is possible only in studies with sufficient statistical power, so with a large amount of samples.

[Participation of the lipid peroxidation processes in the adaptation mechanism of Muridae like rodents to the radioactive contamination of the Chernobyl NPP zone].

Results of the comparative analysis of the complex investigation of rodent population state caught at areas with different levels of contamination in the accident zone of the Chernobyl NPP during 1986-1993 and 2007, at areas with a practically normal radiation background in the neighborhood of the Kiev City in 1993 and at areas with the normal and increased radiation background in Ukhta region of Komi Republic in 1993-2008 are presented. It is shown that the absence of the linear dependence in changes of the lipid peroxidation (LPO) regulatory system parameters in rodent tissues on the dose of the external gamma-radiation at areas of their trap persists for a long time. Different ability to normalization of the studied indices and nonlinearity of their dose dependences allow us to suggest that changes of the scale and direction of interrelations between the reciprocal parameters of the LPO regulatory system in norm in tissues of rodents which were caught in the accident zone and at areas with an increased radiation background should be the information signal determining selection of the strategy of adaptation to the chronic radiation factor action.

[Action of the radioactive environment contamination on the age changes of the lipid peroxidation state in the rodent tissues].

Influence of the environment radioactive contamination on the age changes of the lipid peroxidation state in the Microtus oeconomus tissues (rodents caught in the Komi Republic areas and in the Chernobyl accident zone) was studied. The data show that action extent depends on the external y-radiation level in the trapping areas, the animal sex and the supply of the tissue lipids by antioxidants.

[Correlation of phospholipid composition and physicochemical characteristics of lipids in tissues of the root vole Microtus oeconomus of different ages].

There was performed a comparative analysis of phospholipids and of lipid physicochemical characteristics in spleen, blood erythrocytes, and liver of the root voles caught in the natural environmental habitation at different phases of the population cycle, as well as of the animals born and raised throughout the entire life in vivarium, depending on the animals' sex and age. The age-related changes in the phospholipid composition have been established to correlate with lipid physicochemical characteristics, while the scale and direction of the changes depend on the tissue functional role, the initial level of the antioxidative activity (AOA) of its lipids, and sex of the animals. In the process of the organism aging, parameters of the system of regulation of lipid peroxidation change not unidirectionally; in group of animals of the same age, individuals with different biochemical characteristics can be present.

[Dependence of response reaction of root voles to low-intensity irradiation on the initial state of the tissue antioxidant system].

There has been studied the response of antioxidant (AO) reaction of the tissue system of the root voles Microtus oeconomus Pall. whose parents belonged to the populations long inhabiting the Republic Komi regions with different degrees of radioactive contamination on an additional radiation action at low doses. Differences have been revealed in the phospholipid content, activities of AO defense, intensities of processes of lipid peroxidation (LPO) in tissues of the vole offspring caught in the control and contaminated regions.