Abstract
The mouse antiserum against isologous aggregated immunoglobulins (MAAS) injected to mice sensitized with 10(5) sheep red blood cells (SRBC) did not influence the delayed-type hypersensitivity (DTH) tested on the peak of sensitization (the 4th day) but enhanced significantly DTH tested on the 6th day. MAAS completely abolished the DTH suppression observed after sensitization with 5 x 10(7) SRBC. In transfer experiments the number of the DTH suppressor cells decreased in the spleen of sensitized mice under the MAAS action. MAAS did not affect the proliferation of antibody-forming cells (AFC) and hemagglutinin production but reduced by 70% the number of rosette-forming cells (RFC) in the spleen on the peak of the initial immune response. The data obtained may indicate that RFC participate in DTH suppression.
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