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Biomedical subjects

Ia S Shvartsman

Publications and source records attributed to Ia S Shvartsman.

At least 19 recordsLinked to original sources
PubMed1979

[Anti-infective activity of anti-influenza antibodies from human colostrum].

Antibodies against influenza virus of A, B serological types and PC-virus were detected in the colostrum collected after an epidemic. These antibodies belonged to the secretory IgA form. The secretory antibodies preparation made of colostrum, and its IgA fraction instilled intransally to mice and rats prevented the development of infection caused by 100--10 ID50/0.1 ml of the influenza A virus. The protective action of the antibodies of IgA class was due to its capacity to become fixed on the surface of the cells of the mucosal epithelium of the respiratory tract.

Adsorption↗
PubMed1977

[Participation of secretory antibodies in the protection from influenza].

Two collective bodies (319 persons in all) were under observation from October, 1974 to March, 1975 for the purpose of studying the problem on the participation of antibodies of the respiratory tract secretion in the protection from influenza virus, type A, infection. During the influenza epidemic outbreak there was revealed a reverse relationship between the antibody concentration in the nasal cavity secretion and the incidence of the disease, and also an interaction between the antibodies of the secretions and the serum in the influenza protection.

Adolescent↗
PubMed1976

[Interaction of different types of cells in production of anti-influenzal antibodies. IV. Stimulation of B-lymphocytes by several biologically active substances].

Various biologicall-active preparations such as extracts of syngenous and allogenous thymus and LP S of Gram negative bacteria were administered to sublethally irradiated mice ascertain a possibility of replacement of T-lymphocytes in the production of antibodies to influenza virus. It appeared that the function of T-lymphocytes participating in the production of antibodies to influenza virus in mice could be replaced by the administration to these animals of extracts of the syngenous and allogenous thymus and LP S of Gram negative bacteria.

Animals↗
PubMed1976

[Action of different cell types in influenza antibody production. 5. Keeping the immunologic memory to influenza virus A serotype by B- and T-lymphocytes].

The authors present data on the cooperation of the B- and T-lymphocytes in secondary immunological response to the antigens of influenza virus of serological type A. Cells of the spleen, bone marrow and the thymus in various combinations from the intact and immunized animals were transplanted to sublethally irradiated recipients; influenza virus was administered at the same time. Immunological memory to the virus antigens of serological type A proved to be preserved both by the B- and T-lymphocytes. Both in the primary and in the secondary response B-lymphocytes served as the precursors of cells-producers of antibodies.

Animals↗
PubMed1975

[Interaction of various types of cells in the production of anti-influenzal antibodies. III. Cooperation of B- and T-lymphocytes in the production of antibodies to the influenza virus].

Bone marrow and thymus cells of syngenous donors were transplanted to sublethally irradiated mice to study the interaction between the B- and T-lymphocytes in the production of antibodies to the influenza virus. Influenza virus proved to be referred to the thymus-dependent antigens; both types of the lymphocytes participated in the antibody production. The T-lymphocyte function could not be replaced by an increase in the dose of the antigen and of the amount of B-lymphocytes. The ratio of the B- and T-lymphocytes optimal for the antibody production was 1:1 or 1:2.

Animals↗
PubMed1975

[Formation of secretory antibodies in experimental influenza infection].

The principal peculiarities attending formation of specific secretory immunity in experimental influenza infection were marked individual variability and a relative autonomicity of accumulation of the secretory antibodies. Functional condition of the secretory immunity before the infection influenced the formation of antibodies in the secretions and the blood sera: when the concentration of the secretory antibodies before the infection constituted 1 : 8--1 : 16, general and secretory antibodies accumulated less intensively. There was a progressive fall of the concentration of the secretory immunoglobulin A in the majority of the volunteers the first 3 weeks after the infection. It is supposed that this process played a significant role in the pathogenesis of influenza complications.

Antibody Formation↗
PubMed1975

[Interaction of cells of the lymphoid organs in the production of antibodies against the influenza virus. Report 1. Localization of the virus in the cells of the spleen].

A study was made of localization of crude and inactivated influenza virus injected intravenously and intraperitoneally. Macrophages were found to engulf the virus penetrating into the spleen; this was shown by the quantitative and qualitative immunofluorescent method, elcetron microscopy and inoculation to syngenous recipients of homogenates of macrophagal and lymphocytic fractions of splenic cells. No virus was revealed in the lymphocytes.

Animals↗
PubMed1975

[Interrelationships between serum and secretory antibodies in immunization with live influenza vaccine].

A study was made of the accumulation of antibodies in the blood serum and the secretions of the respiratory tracts of persons immunized with the living influenza vaccine. The duration of inductive phase and the dynamics of the antibody accumulation in the secretions occurred irrespective of their initial level in the blood sera, this pointing to the autonomic character of the local immunity system. On the other hand the functional condition of the system of local immunity influenced the intensity of the antibody formation in the system of the general immunity. If before the immunization the antibody titre in the secretions were 1:4 and greater, the antibody accumulation in the blood sera took place less intensively. An analogous phenomenon was also observed when the antibodies were absent in the secretions before the immunization, but their formation took place as soon as the first week after it. The mechanism of this peculiar "competition for the antigen" of the systems of local and general immunity consisted in the neutralization of the influenza virus in the area of the porta of infection.

Antibodies, Viral↗