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LOCALIZATION OF THE ANTIGEN IN POPLITEAL LYMPH NODES OF RABBITS DURING THE FORMATION OF ANTIBODIES TO HORSERADISH PEROXIDASE

WERNER STRAUS 1

1 Department of Biochemistry, The Chicago Medical School, Chicago, Illinois 60612

The localization of an antigen (horseradish peroxidase) in popliteal lymph nodes of rabbits was investigated in order to detect the possible interrelationship with the location of the specific antibody in the same tissue material. Staining procedures for peroxidase with benzidine, diaminobenzidine and 3-amino-9-ethyl-carbazole, as well as double staining procedures for the antigen and the antibody and for the antigen (or antibody) and acid phosphatase, were applied before and after adsorption of the antigen to sites of antibody in vitro. The appearance of the antigen in the cells lining the lymph sinuses, in reticular cells of medullary cords, in macrophages and in the "intercellular web" of lymphoid follicles was studied after a single and repeated injection of peroxidase, and the persistence of the antigen at these sites was observed. It was found that the localization of the antigen in the cortex and medulla of the lymph node was different depending on whether or not specific antibodies were present in the blood at the time of injection, and that at certain periods a considerable number of plasma cells and lymphoblasts contained the antigen together with the specific antibody.

Submitted on August 13, 1969


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