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[Suppression by bone marrow cells of the level of specific IgE antibodies in the blood of mice and decrease in the production of IGE by bone marrow cells].

Changes in the level of the specific IgE-antibodies to ovalbumin under the influence of syngeneic cells of a bone marrow were studied. The IgE-response was induced by ovalbumin in mice (CBA X C57Bl/6)F1. The bone marrow cells suspensions (20-30 X 10(6) cells per mouse) from syngeneic donors was inoculated simultaneously with the immunization. It was found that bone marrow cells suppressed both the level of IgE-antibodies in experimental mice serum and the production of IgE by the bone marrow cells of the recipient. The ability to suppress IgE-response remained when erythrocytes, monocytes and T-lymphocytes were removed from inoculated suspensions. The bone marrow cells taken from the mice immunized with ovalbumin, at the stage of a decreasing IgE-response, provided more pronounced suppression, than bone marrow cells taken from intact animals.