[Evaluation of cyto- and genotoxic action of ferronanomagnetic and constant magnetic field in in vivo system].

Cyto- and genotoxic effects of nanoparticles on the basis of FM, CMF or their combination have been studied in AKE cells, BM cells of erythroid line, and peripheral blood lymphocytes with the use of MN test and "DNA-comet" assay. It has been shown that expression of mentioned effects is related to FM concentration and duration of tested agent action. It has been also demonstrated that action of CMF alone in the studied cells did not cause any changes in cell architectonics or affect MN counts which are associated with DNA damage. When FM and CMF were used in combination there has been observed the phenomenon of induction of CMF action with FM nanoparticles. The obtained results allow recommend MN test and "DNA-comet" assay as the markers of genome stability in the tests of genotoxic effects of nanomaterials for development of vector nanosystems.

[Visualization of iron nanoparticles accumulation and distribution features in sensitive and resistant to antitumor drugs human breast cancer cells after different time intervals of cultivation with liposomal ferromagnetic].

It was shown in vitro that visualization of iron nanoparticles by histochemical Lilly method, modified by authors for cytomorphological studies, could be a certain control of ferromagnetic income to human breast cancer MCF-7 cells with different sensitivity to antitumor drugs (doxorubicin and cisplatin). The form of the visualized iron nanoparticles, their localization and distribution towards intracellular structures was studied. It was shown that localization, dynamics of accumulation and release of ferromagnetic from cells were connected to their sensitivity to antitumor drugs and time of incubation with iron nanoparticles.

[Experience with using anti-TB preparations (rifabutin)]. / Opyt monitoringa ispol'zovaniia protivotuberkuleznykh preparatov (na primere rifabutina).

The study deals with the first experience of practically using a computer program designed to monitor the treatment process with a subsequent analysis of the efficiency of an anti-TB therapy with regard for different characteristics of patients. The efficiency of chemotherapy was compared (by using the clinical, microbiological and laboratory criteria) in two patients' groups, i.e. a control group (standard chemotherapy regimens) and a group, whose patients received rifabutin. Subgroups were isolated from among the last mentioned patients according to the below factors: primary and secondary therapy courses, completed and interrupted chemotherapy courses, and patients with multidrug resistance who discharged M. tuberculosis. Statistically reliable advantages of rifabutin were shown in respect to the arrest of bacterial discharge during a sufficiently prolonged (at leas 4 months) treatment course applicable to primarily diagnosed patients including those with multidrug resistance and M. tuberculosis. Disadvantages related with the application of rifabutin (a lack of clear-cut indications and abuse of treatment terms virtually in 50% of cases), which reduces the efficiency of its prescription, were equally detected.

[Use of WOBE-MUGOS E for prevention and correction of experimental doxorubicin side-effects]. / Ispol'zovanie VOBE-MUGOS E dlia profilaktiki i korrektsii pobochnykh reaktsii doksorubitsina gidrokhlorida v éksperimente.

Examined in treating rats with Guerin's carcinoma with doxorubicin was the possibility that the polyenzymic drug preparation wobe-mugos E had hepatoprotective, cardioprotective and myeloprotective effects. In intramuscular administration wobe-mugos E has not been found to stimulate the tumour growth, it exhibited a manifest hepatoprotective and myeloprotective actions with respect to adverse reactions of doxorubicin but failed to diminish cardiotoxicity of the latter. The protective effect of the above polyenzymic drug was of a dose-dependent character.

[Correction of DNA methylation disorder as a possible way to modulation of malignant cells drug resistance].

The role of DNA methylation in functioning of a normal and cancer cell is shown in this review. The value of methylation in functioning of the systems which are involved in the process of formation of malignant cells drug resistance phenotype (regulator proteins of cellular cycle, DNA-adducts reparation, transport systems, systems of detoxication and adhesion) is explicated. The prospects of the antineoplastic therapy directed to regulation of DNA methylation by means of homocysteine and demethylation agents are analyzed.