COMPARATIVE CHARACTERIZATION OF THE MACROORGANISM IMMUNE RESPONSE AFTER PERORAL AND PARENTERAL INTRODUCTION OF METALLIC NANOCOMPOSITE

Influence of a cobalt-containing nanobiocomposite on basis of arabinogalactane on morphological changes in immunocompetent organs of the experimental animals at peroral and parenteral introduction was studied, by a computer program. «Morphometry». Comparative estimation, of morphological and. histological changes in spleen and. regional lymph, nodes of the outbred. white mice was performed

ESTIMATION OF INFLUENCE OF ARGENTOGALACTOMANNAN AND ARGENTO-POLY-1-VINYL-1,2,4-TRIAZOLE ON POPULATION STRUCTURE OF RED MARROW CELLS OF EXPERIMENTAL ANIMALS

We studied influence of silver-containing nanocomposites — galactomannan and poly-1-vinyl-1,2,4-triazole — on cell structure of peripheral blood and red marrow of white mice. The results obtained after the experiments testify that these nanocomposites aren't toxic, the changes caused by their introduction are productive and. part of them points at the activization of immune system of macroorganizm

COMPARATIVE CHARACTERISTICS OF IMMUNOLOGICAL RECONSTRUCTION OF WHITE MICE IMMUNIZED BY CELL WALL OF DIFFERENT SUBSPECIES OF FRANCISELLA TULARENSIS

At present, development of effective vaccines of new generation is an actual problem, in particular concerning the tularemia causative agent. It determines the need to search antigen determinants with high immunogenic activity. Some authors demonstrate that outer membrane proteins of Francisella tularensis possess immunological activity. This fact gave occasion to isolation and comprehensive study of F tularensis cellular envelopes as a perspective component in vaccine engineering. The influence of cell walls of F. tularensis was studied for morphological changes in immunocompetent organs of experimental animals. Cell walls were obtained from three virulence strains of living cultures: F. tularensis subsp. mediaasiatica А-61, F. tularensis subsp. nearctica В-399 A-Cole, F. tularensis subsp. holarctica 306 and vaccine strain F. tularensis subsp. holarctica 15 (extracted by Research Institute of Epidemiology and Hygiene). Cell walls of different subspecies of F. tularensis stimulate the production of antibody forming cells and cell proliferation more in T-dependent zones of lymph nodes and spleen. It has been determined that these antigen preparations do not cause stress reaction of the experimental animal organisms. Basing on the findings, we made a conclusion that there is a need for further detailed investigation of immunogenic properties of CE F. tularensis subsp. holarctica 306, F. tularensis subsp. mediasiatica А-61 and F. tularensis subsp. tularensis B-399 A-Cole as perspective components in development of tularemia vaccines

Changes in cellular components of peritoneal fluid of white mice with infection caused by Yersinia pestis with different plasmid profile

The article presents the data on the influence of Yersinia pestis plasmid profile on subpopulation structure of mononuclear cells of peritoneal fluid of mice at the early stages of infectious process. It was showed that change of cellular composition of peritoneal fluid of the experimental animals depended on the plasmid profile of Yersinia pestis strains. The phase character in the changes of quantitative composition of the mast cells of peritoneal fluid of white mice infected with Y. pestis strains with different plasmid spectrum was determined

Changes in immunocompetent guinea pigs immunizing with Francisella Tularensislipopoly-saccharide

Influence of Francisella tularensis lipopolysaccharide preparations on morphological changes in immunocompetent experimental animals was studied by subcutaneous introduction using survey microscopy and morphometric methods. Low expressed activation of B- and T-dependent bands in immunocompetent organs was determined. Proliferation of antigen-presented cells at early stages of investigation indicates the cell immunity activation. Pathomorphological alterations caused by lipopolysaccharide inoculation are homogeneous and benignant

Assessment of Toxic and Immunoadjuvant Properties of Nanocomposites

Introduction. The current direction in medicine is the creation of immunobiological preparations to increase the effectiveness of specific immunotherapy and immunoprophylaxis, containing immunomodulators in their composition. These natural or synthetic substances can have a regulating effect on the immune system. At present, water-soluble organic-inorganic polymeric materials with nanoparticles of various chemical substances with bactericidal and immunomodulating properties can serve as such promising compounds.The aimof the work is to study the acute toxicity of polymer nanocomposites based on 1-vinil-1,2,4-triazole copolymer with N-vinylpyrrolidone with silver, gold and selenium nanoparticles and their effect on the functional state of immune system cells in vitro.Materials and methods.The study of acute toxicity was performed on outbred white mice. The activity of superoxide dismutase and glucose-6-phosphate dehydrogenase were studied in guinea pig peritoneal macrophages. The study of spontaneous and nanocomposite-induced production of pro- (interferon gamma and tumor necrosis factor alpha) and anti-inflammatory (interleukin-4) cytokines by blood cells was carried out using clinical material obtained from volunteers using the ELISA method. Results. It has been established that nanocomposites with silver and gold nanoparticles do not cause the death of white mice, their temperature increase and body weight decrease. The average lethal dose for a nanocomposite with selenium nanoparticles was determined as 1 gram per 1 kilogram of animal mass. It was shown that the tested nanocomposites have a stimulating effect on the production of cytokines by human blood cells in vitro. It was established that a nanocomposite with selenium nanoparticles increases the activity of superoxide dismutase and glucose-6-phosphate dehydrogenase. A comparative analysis of their actions with the actions of commercial preparations of biological origin, with immunomodulatory properties.Conclusion. The data obtained allow us to substantiate the need for further research on the effects of nanocomposites based on 1-vinyl-1,2,4-triazole copolymer with N-vinylpyrrolidone with silver, gold and selenium nanoparticles on the macroorganism in both in vitro and in vivo conditions

Change of the composition of splenic lymphocytes at the effect of argentogalactomanann and argento-poly-1-vinyl-1,2,4-triazole on the experimental animals

The article presents the results of the research of effect of metal-containing nanocomposites on the content of splenic Band T-lymphocytes of white mice. Phenotypic analysis of the spleen cells suspension was conducted by flow cytometry on BD FACSCanto ™ П. Stimulating effect of these medications on the immune response formation is showed and is proved by the increase of content of B-lymphocytes and T-helper cells and it indicates cooperative interactions between the cells of immune system. It was experimentally showed that the medications 2-N-HTP-Ag, GM-Ag can be recommended for the further research in order to increase protective properties of an organism

PATHOMORPHOLOGICAL CHANGES IN LIVER OF WHITE MICE AT EXPERIMENTAL PLAGUE INFECTION CAUSED BY YERSINIA PESTIS OF DIFFERENT PLASMID COMPOSITION

Data of histological study of pathomorphological changes in liver of white mice with experimental plague are represented in the article. An important element in evaluation and prediction of the pathological process in the liver is the analysis of hepatocyte karyokinesis, the mitotic index calculation, the counting number of atypical mitosis and the degree of organ regeneration ability. Dynamics of these liver changes at infection process in experimental animals caused by Yersinia pestis plasmid variants was investigated in this work. The variability of liver injuries was shown depending on plasmid-associated virulence of the infection agent. It was proved that the Y. pestis strain carrying three basic pYP (6 mDa), pYV (45 mDa), pYT (61 mDa) plasmids caused the most severe systemic disease with lethal outcome as a rule. Lack of species-specific plasmids and especially virulence and pathogenicity plasmids reduced the rate of infection process generalization and the ability of the pathogen to initiate pathological changes incompatible with the microorganism life. Therefore, all morphological liver changes in experimental plague infection are directly dependent on plasmid profile of the pathogen. The mechanism of toxicity included the damaging effect of the toxin to the cellular structures and failure of the metabolic processes in the organism. Acuity of intoxication and the development of pathological process can be estimated by exploring changes in liver morphology

INFLUENCE OF BRUCELLA ABORTUS I-206 THERMOEXTRACTS IN L- AND S-FORM ON MORPHOFUNCTIONAL STATE OF WHITE MICE ADRENAL GLANDS

Live vaccines are used for specific brucellosis prophylaxis in the Russian Federation. These vaccines in addition to a number of  positive properties have some limitations including high  agglutinogenicity, reactogenicity, sensitizing activity. In this  connection, the development of subunit vaccines without adverse  reactions is a perspective direction in modern vaccinology. Complex  morphological research of the adrenal glands and comparative  analysis of peripheral blood (leukogram, leukocytic index and index  of allergization) of white mice immunized with thermoextracts (ТE)  of Brucella abortus I-206 in L- and S-form and inactivated vaccine B.  abortus 19 ВА were conducted. It was shown that ТE unlike B.  abortus 19 ВА caused minor alterations in peripheral blood of the  experimental animals in early periods of observation (increase of allergization index, changes in leukogram) with the subsequent  levelling to the values in control. Expositions of the adrenal gland  zoning were determined and cellular structure was estimated in  consideration of morphometry. Changes in architectonics of the mice  organ immunized with B. abortus 19 ВА were revealed. These alterations could indicate the stress-reaction development. In  case of ТE application the given changes were insignificant and were  developed in early periods. The revealed morphological changes in  adrenal glands of laboratory animals permit to prove the necessity of  realization the further experimental researches to ТE application  as the components for development of a subcellular brucellosis vaccine

Studying of immunophysiological properties of Yersinia Pestis strains with various plasmid composition

Data of Yersinia pestis plasmid structure influence on its adhesive properties and phagocytic activity of peritoneal macrophages in vitro are represented. It is shown that Y. pestis strains of diverse subspecies differing by a plasmid profile, particularly by one of the plasmids (pYP, pYV) lacking, possess low adhesive activity and promote the increase of laboratory animal phagocyte absorbing capacity